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Nevada State Basin Outlook Report for April, 2013


	NEVADA Water Supply Outlook Report as of April 1, 2013

This year is ending with fairly similar snow and precipitation numbers as 
last year did.  While the Sierra Nevada range started off the New Year with 
phenomenal snowpack numbers, a dry January, February, and March have left 
western Nevada in very dry shape.  The remainder of the state has fared just 
as poorly with dry conditions dominating the region for a second year in a 
row.  A hoped for Fabulous February or even a Miracle March failed to 
materialize, leaving us hoping for an Awesome April to try to recover 
somewhat from the hole the state is currently in.  While reservoir storage 
is adequate for the main populated areas of the state, meeting all water 
needs this summer is going to be very difficult to do, leaving many areas 
facing shortages and having to make some difficult decisions regarding 
irrigated agricultural acreage.  Water users will need to work closely with 
their suppliers to determine the extent of any restrictions that may apply 
this year.  Areas with poor reservoir storage or agricultural areas that get 
their water directly from a river or creek can expect these flows to decline 
earlier than normal this year.


	SNOWPACK

April 1 snowpack conditions for Nevada and eastern California are well below 
average for the entire state.  There are no bright spots in the state this 
year.  Coming on the heels of last year?s very dry conditions, the lack of 
snow is extremely troubling and will lead to water shortages for parts of 
the state.  An extremely dry couple of months have led to declining numbers 
and have resulted in some basins having lower snowpack numbers than they did 
last year.  The Lower Humboldt River Basin had the highest April 1 value at 
75 percent of average.  The Northern Great Basin was the lowest at 0 percent 
of average for the limited number of snow sites reporting.

                                          Last Year            This Year
   Basin                         Percent of Average   Percent of Average

   Lake Tahoe .................................  55 ................  52
   Truckee River ..............................  59 ................  60
   Carson River ...............................  42 ................  63
   Walker River ...............................  37 ................  72
   Northern Great .............................  48 ................   0
   Upper Humboldt River .......................  42 ................  66
   Lower Humboldt River .......................  46 ................  75
   Clover Valley & Franklin River .............  40 ................  63
   Snake River ................................  48 ................  71
   Owyhee River ...............................  35 ................  49
   Eastern Nevada .............................  55 ................  50
   Lower Colorado River.......................   36 ................   2 


	PRECIPITATION

March precipitation for Nevada and eastern California was generally half or 
less of average statewide.  The exception was southern Nevada which received 
average amounts for the month.  This lack of moisture continued the dry 
spell and has led to further declines in our water year totals for the 
state.  March precipitation was the highest in the Lower Colorado River 
Basin at 103 percent of average and the lowest in Eastern Nevada at 26 
percent of average.  Water year precipitation is the highest in the Snake 
River Basin at 91 percent of average and the lowest in the Lower Colorado 
River Basin at 47 percent of average.

                                              March           Water Year
   Basin                         Percent of Average   Percent of Average

   Lake Tahoe .................................  50 ................  84
   Truckee River ..............................  40 ................  77
   Carson River ...............................  50 ................  75
   Walker River ...............................  45 ................  76 
   Northern Great .............................  34 ................  77
   Upper Humboldt River .......................  43 ................  81
   Lower Humboldt River .......................  40 ................  85
   Clover Valley and Franklin River ...........  55 ................  65
   Snake River ................................  52 ................  91
   Owyhee River ...............................  41 ................  85
   Eastern Nevada .............................  26 ................  76
   Lower Colorado River ....................... 103 ................  47


	RESERVOIRS

End of March reservoir storage in Nevada and eastern California has declined 
in many basins.  Reservoir storage was the highest in the Truckee River 
Basin at 106 percent of average.  The Lower Humboldt River Basin is the 
lowest at 11 percent of average.

   Basin                        Percent of Capacity   Percent of Average

   Lake Tahoe .................................  49 ................  93
   Truckee River ..............................  67 ................ 106
   Carson River ...............................  42 ................  62
   Walker River ...............................  32 ................  49
   Lower Humboldt River .......................  23 ................  11
   Owyhee River ...............................  40 ................  73
   Lower Colorado River .......................  54 ................  68


	STREAMFLOW

Streamflow forecasts for Nevada and eastern California are expected to be 
well below average for the state.  Streamflow forecasts are the highest in 
the Walker River Basin at 61 percent of average and the lowest in the Lower 
Humboldt River Basin at 10 percent of average.

                                                      Percent of Average
                                         50 Percent Chance of Exceedance
Basin                                  

   Lake Tahoe ......................................................  35
   Truckee River ...................................................  47
   Carson River ....................................................  40
   Walker River ....................................................  61
   Northern Great ..................................................  58
   Upper Humboldt River ............................................  38
   Lower Humboldt River ............................................  10
   Clover Valley and Franklin River ................................  58
   Snake River .....................................................  64
   Owyhee River ....................................................  20
   Eastern Nevada ..................................................  31
   Lower Colorado River ............................................  34


	LAKE TAHOE BASIN as of April 1, 2013

Snowpack conditions in the Lake Tahoe Basin are well below median.  Snow 
water content is 52 percent of the April 1 median.  Last year, snow water 
content was 55 percent of median.

March precipitation was 50 percent of average.  Water year precipitation, 
beginning October 1, was 84 percent of average.  Last year, March 
precipitation was 159 percent of average and water year precipitation was 67 
percent of average.

The elevation of Lake Tahoe on the last day of March was 6225.98 feet and 
usable storage was 362,400 acre-feet or 93 percent of average.  Last year, 
at this time, the elevation of Lake Tahoe was 6227.06 for a usable storage 
of 494,100 acre-feet.  

Lake Tahoe is forecast to rise 0.55 feet from April 1 to its high elevation.

================================================================================
                              LAKE TAHOE BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Marlette Lk Inflow (Acre-Ft)
   APR-JUL     17.0      131       325       36       622      983       911  
   MAY-JUL     13.0       77       190       30       429      781       630  

Lake Tahoe Rise (Gates Closed) (1)
   APR-HIGH     0.03     0.37      0.55      42       0.73     1.13      1.31 
   MAY-HIGH     0.01     0.12      0.30      28       0.48     0.88      1.00  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              LAKE TAHOE BASIN
                   Reservoir Storage (1000AF) End of March
================================================================================
                                Usable     ********** Usable Storage *********
Reservoir                      Capacity    This Year    Last Year      Average
================================================================================
LAKE TAHOE                       744.6        362.4        494.1         ----   
================================================================================

================================================================================
                              LAKE TAHOE BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
LAKE TAHOE RISE                      14                 85                 52
LAKE TAHOE BASIN                     13                 85                 53
================================================================================


	TRUCKEE RIVER BASIN as of April 1, 2013

Snowpack conditions in the Truckee River Basin are well below median.  Snow 
water content is 60 percent of the April 1 median.   Last year, snow water 
content was 59 percent of median.

March precipitation was 40 percent of average.  Water year precipitation, 
beginning October 1, was 77 percent of average.  Last year, March 
precipitation was 153 percent of average and water year precipitation was 67 
percent of average.

Reservoir storage for the basin on the last day of March was 197,100 acre-
feet or 106 percent of average.  Boca Reservoir was 86 percent of average, 
Prosser Reservoir was 95 percent of average, and Stampede Reservoir was 109 
percent of average.  Last year, at this time, basin reservoir storage was 
221,000 acre-feet or 124 percent of average.

Streamflows are expected to be well below average.  The Truckee River, at 
Farad, CA, is expected to flow at 46 percent of average or 120,000 acre-feet 
during the April-July forecast period.  The Little Truckee River, above Boca 
Reservoir, is expected to flow at 55 percent of average or 44,000 acre-feet 
during the April-July forecast period.

================================================================================
                              TRUCKEE RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Sagehen Ck nr Truckee
   APR-JUL      1.1      1.3       1.3       22       1.5      1.8       5.6  
   MAY-JUL      0.7      0.8       0.8       19       1.0      1.1       4.2  

L Truckee R ab Boca
   APR-JUL      3.2     13.1        44       55        75      120        80  
   MAY-JUL      1.3      9.4        33       52        57      106        63  

Truckee R at Farad
   APR-JUL      7.0       74       120       46       166      233       260  
   MAY-JUL    -20.0       41        83       43       125      186       193  

Steamboat Ck at Steamboat
   APR-JUL      0.2      0.7       1.3       17       2.3      4.4       7.9  

Galena Ck at Galena Ck State Pk
   APR-JUL      1.1      1.8       2.3       53       2.8      3.5       4.4  

Galena Ck nr Steamboat (Acre Feet)
   APR-JUL     1314     1635      1900       44      2205     2748      4345  
   MAY-JUL     1121     1437      1700       43      2013     2577      3936  

Pyramid Lake Rise (ft)
   LOW-HIGH   -2.80    -0.79      0.10        6      0.99     3.00      1.70 

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              TRUCKEE RIVER BASIN
                   Reservoir Storage (1000AF) End of March
================================================================================
                                Usable     ********** Usable Storage *********
Reservoir                      Capacity    This Year    Last Year      Average
================================================================================
BOCA RESERVOIR                    40.9         20.2          9.3         23.4   
PROSSER RESERVOIR                 28.6          9.8         10.0         10.3   
STAMPEDE RESERVOIR               226.5        167.1        201.7        153.0   
================================================================================

================================================================================
                              TRUCKEE RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
TRUCKEE RIVER                        17                 93                 61
LITTLE TRUCKEE RIVER                  5                 89                 62
SAGE HEN CREEK                        3                 89                 61
GALENA CREEK                          2                131                 83
STEAMBOAT DRAINAGE                    3                130                 80
PYRAMID LAKE                         31                 90                 58
TRUCKEE RIVER BASIN                  17                 93                 61
================================================================================


	CARSON RIVER BASIN as of April 1, 2013

Snowpack conditions in the Carson River Basin are well below median.  Snow 
water content is 63 percent of the April 1 median.  Last year, snow water 
content was 42 percent of median.

March precipitation was 50 percent of average.  Water year precipitation, 
beginning October 1, was 75 percent of average.  Last year, March 
precipitation was 130 percent of average and water year precipitation was 59 
percent of average.

Lahontan Reservoir storage on the last day of March was 123,800 acre-feet or 
62 percent of average.  At this time, last year, reservoir storage was 
217,300 acre-feet or 98 percent of average.

Streamflows are expected to be well below average.  The Carson River, near 
Carson City, is expected to flow at 39 percent of average or 70,000 acre-
feet during the April-July forecast period.  The Carson River, at Fort 
Churchill, is expected to flow at 33 percent of average or 56,000 acre-feet 
during the April-July forecast period.  The East Fork Carson River near 
Gardnerville is expected to flow at 500 cfs on June 3, while the 200 cfs 
flow is expected on June 23.

================================================================================
                              CARSON RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
EF Carson R nr Gardnerville
   APR-JUL       46       75        95       51       115      144       186  
   MAY-JUL       20       48        68       45        87      115       151  

   Date of 500 cfs flow
              18May    28May       03Jun            09Jun    19Jun     01Jul
   Date of 200 cfs flow
              06Jun    16Jun       23Jun            30Jun    01Jul     25Jul

WF Carson R at Woodfords
   APR-JUL     13.1       23        30       56        37       47        54  
   MAY-JUL     -3.5      8.7      17.0       41        25       38        42  

Carson R nr Carson City
   APR-JUL       44       58        70       39        83      105       179  
   MAY-JUL       27       39        50       35        62       84       144  

Marlette Lk Inflow (Acre-Ft)
   APR-JUL     17.0      131       325       36       622      983       911  
   MAY-JUL     13.0       77       190       30       429      781       630  

Carson R nr Fort Churchill
   APR-JUL       28       43        56       33        71       98       171  
   MAY-JUL     15.0       27        37       27        50       74       138  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              CARSON RIVER BASIN
                   Reservoir Storage (1000AF) End of March
================================================================================
                                Usable     ********** Usable Storage *********
Reservoir                      Capacity    This Year    Last Year      Average
================================================================================
LAHONTAN RESERVOIR               295.1        123.8        217.3        198.8   
================================================================================

================================================================================
                              CARSON RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
E.F. CARSON RIVER                     4                129                 65
W.F. CARSON RIVER                     7                127                 63
CARSON Rv. at Carson City             7                127                 63
CARSON Rv. at Ft. Churchill           7                127                 63
CARSON RIVER BASIN                    7                127                 63
================================================================================


	WALKER RIVER BASIN as of April 1, 2013

Snowpack conditions in the Walker River Basin are well below median.  Snow 
water content is 72 percent of the April 1 median.  Last year, snow water 
content was 37 percent of median.

March precipitation was 45 percent of average.  Water year precipitation, 
beginning October 1, was 76 percent of average.  Last year, March 
precipitation was 83 percent of average and water year precipitation was 54 
percent of average.

Reservoir storage for the basin on the last day of March was 32,800 acre-
feet or 49 percent of average.  Bridgeport Reservoir was 64 percent of 
average and Topaz Reservoir was 38 percent of average.  Last year, at this 
time, basin reservoir storage was 85,800 acre-feet or 122 percent of 
average.

Streamflows are expected to be well below average.  The West Walker River, 
near Coleville, CA, is expected to flow at 62 percent of average or 101,000 
acre-feet during the April-July forecast period.  The East Walker River, 
near Bridgeport, CA, is expected to flow at 63 percent of average or 42,000 
acre-feet during the April-August forecast period.

================================================================================
                              WALKER RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
E Walker R nr Bridgeport
   APR-AUG      3.6       26        42       63        58       80        67  
   MAY-AUG     10.4       29        35       59        53       72        59  

W Walker R bl L Walker R nr Coleville
   APR-JUL       59       84       100       62       116      141       162  
   MAY-JUL       42       66        82       58        98      122       142  

W Walker R nr Coleville
   APR-JUL       93       98       101       62       104      109       163  

Walker Lake Rise (ft)
   LOW-HIGH   -2.30    -0.98      0.12       11      0.76     1.32      1.14

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              WALKER RIVER BASIN
                   Reservoir Storage (1000AF) End of March
================================================================================
                                Usable     ********** Usable Storage *********
Reservoir                      Capacity    This Year    Last Year      Average
================================================================================
BRIDGEPORT RESERVOIR              42.5         17.7         41.0         27.7   
TOPAZ RESERVOIR                   59.4         15.1         44.8         39.6   
================================================================================

================================================================================
                              WALKER RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
E. WALKER Rv. nr Bridgeport           4                174                 62
W. WALKER Rv. nr Coleville            5                176                 76
WALKER LAKE RISE                      8                176                 72
WALKER RIVER BASIN                    8                176                 72
================================================================================


	NORTHERN GREAT BASIN as of April 1, 2013

Snowpack conditions in the Northern Great Basin are well below median.  Snow 
water content is 0 percent of the April 1 median.  Last year, snow water 
content was 48 percent of median.

March precipitation was 34 percent of average.  Water year precipitation, 
beginning October 1, was 77 percent of average.  Last year, March 
precipitation was 108 percent of average and water year precipitation was 60 
percent of average.

Streamflows are expected to be well below average.  McDermitt Creek, near 
McDermitt, is expected to flow at 49 percent of average or 6,800 acre-feet 
during the April-July forecast period.

================================================================================
                              NORTHERN GREAT BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Eagle Ck nr Eagleville
   APR-JUL      0.7      2.1       2.8       65       3.9      5.3       4.3  

Bidwell CK nr Ft. Bidwell
   APR-JUL      3.6      5.7       7.2       60       8.6     10.7      12.0  

McDermitt Ck nr McDermitt
   APR-JUL      0.4      3.2       6.8       49      10.4     15.8      14.0  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              NORTHERN GREAT BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
QUINN RIVER                           1                  0                  0
E. FORK QUINN                         1                  0                  0
McDERMITT CREEK                       1                  0                  0
NORTHERN GREAT BASIN                  2                  0                  0
================================================================================


	UPPER HUMBOLDT RIVER BASIN as of April 1, 2013

Snowpack conditions in the Upper Humboldt River Basin are well below median.  
Snow water content is 66 percent of the April 1 median.  Last year, snow 
water content was 42 percent of median.

March precipitation was 43 percent of average.  Water year precipitation, 
beginning October 1, was 81 percent of average.  Last year, March 
precipitation was 96 percent of average and water year precipitation was 77 
percent of average.

Streamflows are expected to be well below average.  The Humboldt River, near 
Palisades, is expected to flow at 37 percent of average or 84,000 acre-feet 
during the April-July forecast period.

================================================================================
                              UPPER HUMBOLDT RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Marys R nr Deeth
   APR-JUL      0.7     10.4      17.0       47        24       33        36  
   MAY-JUL      0.5      5.7      13.0       50        20       31        26  

Lamoille Ck nr Lamoille
   APR-JUL      5.6     13.0      18.0       62        23       30        29  
   MAY-JUL      3.3     10.8      16.0       59        21       29        27  

NF Humboldt R at Devils Gate
   APR-JUL      0.7      7.4      13.0       38      18.6       27        34  
   MAY-JUL      0.2      2.2       8.0       36      13.9       22        22  

Humboldt R nr Elko
   APR-JUL      3.1     18.4        54        0        90      142       0.0  
   MAY-JUL      1.2     10.7        36        0        69      118       0.0  

SF Humboldt R ab Dixie Ck
   APR-JUL      1.3     15.8        32       49        48       72        66  
   MAY-JUL      1.1     12.3        28       49        44       67        57  

Humboldt R nr Carlin
   APR-JUL       38       87       120       50       153      202       238  
   MAY-JUL     11.0       57        88       47       119      165       189  

Humboldt R at Palisades
   APR-JUL      7.0       44        84       37       124      184       225  
   MAY-JUL      5.0       22        60       35        98      154       171  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              UPPER HUMBOLDT RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
LAMOILLE CREEK                        3                121                 61
S. FORK HUMBOLDT                      5                128                 67
MARY'S RIVER                          1                105                 58
N. FORK HUMBOLDT                      2                109                 73
HUMBOLDT Rv. at Palisades            18                133                 66
HUMBOLDT RIVER at Comus              18                133                 66
UPPER HUMBOLDT RIVER BASIN           18                133                 66
================================================================================


	LOWER HUMBOLDT RIVER BASIN as of April 1, 2013

Snowpack conditions in the Lower Humboldt River Basin are well below median.  
Snow water content is 77 percent of the April 1 median.  Last year, snow 
water content was 46 percent of median.

March precipitation was 40 percent of average.  Water year precipitation, 
beginning October 1, was 85 percent of average.  Last year, March 
precipitation was 122 percent of average and water year precipitation was 73 
percent of average.

Rye Patch Reservoir storage on the last day of March was 22,000 acre-feet or 
23 percent of average.  Last year, at this time, reservoir storage was 
145,500 acre-feet or 129 percent of average.

Streamflows are expected to be well below average.  The Humboldt River, near 
Imlay, is expected to flow at 11 percent of average or 20,000 acre-feet 
during the April-July forecast period.

================================================================================
                              LOWER HUMBOLDT RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Rock Ck nr Battle Mountain
   APR-JUL      0.4      2.5       5.3       29       8.2     12.4      18.2  
   MAY-JUL      0.2      1.2       2.6       27       5.0      8.5       9.8  

Humboldt R at Comus
   APR-JUL      2.0       22        65       30       112      181       215  
   MAY-JUL      2.0     17.0        45       29        81      135       156  

L Humboldt R nr Paradise Valley
   APR-JUL      0.1      0.6       2.1       22       5.8      9.1       9.7  
   MAY-JUL      0.1      0.7       1.4       19       3.9      6.8       7.6  

Martin Ck nr Paradise Valley
   APR-JUL      0.5      2.9       7.9       45      13.0     18.2      17.5  
   MAY-JUL      0.1      1.6       5.0       41       8.8     12.3      12.2  

Humboldt R nr Imlay
   APR-JUL      2.0      7.0        20       11        79      173       188  
   MAY-JUL      1.0      4.0      14.0       10        71      140       141  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              LOWER HUMBOLDT RIVER BASIN
                   Reservoir Storage (1000AF) End of March
================================================================================
                                Usable     ********** Usable Storage *********
Reservoir                      Capacity    This Year    Last Year      Average
================================================================================
RYE PATCH RESERVOIR              194.3         22.0        145.5         97.0   
================================================================================

================================================================================
                              LOWER HUMBOLDT RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
LITTLE HUMBOLDT RIVER                 4                103                 55
MARTIN CREEK                          3                107                 57
REESE RIVER                           4                237                 87
ROCK CREEK                            3                110                103
LOWER HUMBOLDT RIVER BASIN           11                131                 75
================================================================================


	CLOVER VALLEY & FRANKLIN RIVER BASIN as of April 1, 2013

Snowpack conditions in the Clover Valley and Franklin River Basin are well 
below median.  Snow water content is 63 percent of the April 1 median.  Last 
year, snow water content was 40 percent of median.

March precipitation was 55 percent of average.  Water year precipitation, 
beginning October 1, was 65 percent of average.  Last year, March 
precipitation was 76 percent of average and water year precipitation was 79 
percent of average.

Streamflows are expected to be well below average.  The Franklin River, near 
Arthur, is expected to flow at 58 percent of average or 4,000 acre-feet 
during the April-July forecast period.

================================================================================
                              CLOVER VALLEY & FRANKLIN RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Franklin R nr Arthur
   APR-JUL      2.2      3.3       4.0       58       4.7      5.8       6.9  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              CLOVER VALLEY & FRANKLIN RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
FRANKLIN RIVER                        2                144                 74
CLOVER VALLEY                         1                 79                 35
CLOVER VALLEY & FRANKLIN RIV          3                127                 63
================================================================================


	SNAKE RIVER BASIN as of April 1, 2013

Snowpack conditions in the Snake River Basin are well below median.  Snow 
water content is 71 percent of the April 1 median.  Last year, snow water 
content was 48 percent of median.

March precipitation was 52 percent of average.  Water year precipitation, 
beginning October 1, was 91 percent of average.  Last year, March 
precipitation was 98 percent of average and water year precipitation was 90 
percent of average.

Streamflows are expected to be well below average.  The Salmon Falls Creek, 
near San Jacinto, is expected to flow at 64 percent of average or 45,000 
acre-feet during the April-July forecast period.

================================================================================
                              SNAKE RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Salmon Falls Ck nr San Jacinto
   APR-JUL       25       36        45       64        55       71        70  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              SNAKE RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
SALMON FALLS CREEK                    4                138                 87
SNAKE RIVER BASIN                     7                124                 68
================================================================================


	OWYHEE RIVER BASIN as of April 1, 2013

Snowpack conditions in the Owyhee River Basin are well below median.  Snow 
water content is 49 percent of the April 1 median.  Last year, snow water 
content was 35 percent of median.

March precipitation was 41 percent of average.  Water year precipitation, 
beginning October 1, was 85 percent of average.  Last year, March 
precipitation was 104 percent of average and water year precipitation was 84 
percent of average.

Wildhorse Reservoir storage on the last day of March was 28,600 acre-feet or 
73 percent of average.  Last year, at this time, reservoir storage was 
54,900 acre-feet or 119 percent of average.

Streamflows are expected to be well below average.  The Owyhee River, near 
Gold Creek, is expected to flow at 20 percent of average or 4,400 acre-feet 
during the April-July forecast period.

================================================================================
                              OWYHEE RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Owyhee R nr Gold Ck (2)
   APR-JUL      0.3      1.9       4.4       20       8.5     18.4        22  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              OWYHEE RIVER BASIN
                   Reservoir Storage (1000AF) End of March
================================================================================
                                Usable     ********** Usable Storage *********
Reservoir                      Capacity    This Year    Last Year      Average
================================================================================
WILDHORSE RESERVOIR               71.5         28.6         54.9         39.2   
================================================================================

================================================================================
                              OWYHEE RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
OWYHEE RIVER nr Owyhee                4                133                 53
OWYHEE Rv. nr Gold Creek              2                164                 47
S. FORK OWYHEE RIVER                  4                100                 44
OWYHEE RIVER BASIN                    8                118                 49
================================================================================


	EASTERN NEVADA as of April 1, 2013

Snowpack conditions in Eastern Nevada are well below median.  Snow water 
content is 50 percent of the April 1 median.  Last year, snow water content 
was 55 percent of median.

March precipitation was 26 percent of average.  Water year precipitation, 
beginning October 1, was 76 percent of average.  Last year, March 
precipitation was 82 percent of average and water year precipitation was 82 
percent of average.

Streamflows are expected to be well below average.  Steptoe Creek, near Ely, 
is expected to flow at 26 percent of average or 700 acre-feet during the 
April-July forecast period.

================================================================================
                              EASTERN NEVADA
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Kingston Ck nr Austin
   APR-JUL      0.1      0.4       1.0       28       2.4      3.9       3.6  

Lehman Ck nr Baker
   APR-JUL      0.1      0.4       1.0       37       1.6      2.5       2.7  

Cleve Ck nr Ely
   APR-JUL      0.1      0.5       1.4       32       2.3      3.7       4.4  

Steptoe Ck nr Ely
   APR-JUL      0.1      0.3       0.7       26       1.1      1.8       2.7  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              EASTERN NEVADA
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
KINGSTON CREEK                        1                153                 86
STEPTOE VALLEY                        3                 89                 48
EASTERN NEVADA                       10                 82                 52
================================================================================


	LOWER COLORADO RIVER BASIN as of April 1, 2013

Snowpack conditions in the Lower Colorado River Basin are well below median.  
Snow water content is 2 percent of the April 1 median.  Last year, snow 
water content was 36 percent of median.

March precipitation was 103 percent of average.  Water year precipitation, 
beginning October 1, was 47 percent of average.  Last year, March 
precipitation was 36 percent of average and water year precipitation was 34 
percent of average.

Reservoir storage on the last day of March for the Lower Colorado River 
Basin was 68 percent of average.  Storage for Lake Mead was 13,465,000 acre-
feet or 66 percent of average, while Lake Mohave was 1,673,100 acre-feet or 
99 percent of average.

The Colorado River inflow to Lake Powell is expected to flow at 34 percent 
of average or 2,400,000 acre-feet during the April-July forecast period.  
The Virgin River, near Littlefield, AZ, is expected to flow at 34 percent of 

================================================================================
                              LOWER COLORADO RIVER BASIN
                      Streamflow Forecasts - April 1, 2013
================================================================================
            |  <=== Drier ===  Future  Conditions  === Wetter ===>  |
            |                                                       |
Forecast Pt |  ============== Chance of Exceeding * ==============  |
   Forecast |  90%       70%   |   50%           |  30%       10%   | 30 Yr Avg
   Period   |(1000AF)  (1000AF)|(1000AF) (% AVG.)|(1000AF)  (1000AF)| (1000AF)
================================================================================
Lake Powell Inflow  (2)
   APR-JUL     1183     1856      2400       34      3014     4044      7160  

Virgin R nr Hurricane
   APR-JUL      6.9     14.8        22       35        31       46        63  

Virgin R at Littlefield
   APR-JUL      5.6     14.1        22       34        32       49        65  

================================================================================
   * 90%, 70%, 50%, 30%, and 10% chances of exceeding are the probabilities that
     the actual volume will exceed the volumes in the table.

   The average is computed for the 1981-2010 base period.

   (1) - The values listed under the 10% and 90% Chance of Exceeding are
         actually 5% and 95% exceedance levels.
   (2) - The value is natural volume - actual volume may be affected by upstream
         water management.

================================================================================
                              LOWER COLORADO RIVER BASIN
                   Reservoir Storage (1000AF) End of March
================================================================================
                                Usable     ********** Usable Storage *********
Reservoir                      Capacity    This Year    Last Year      Average
================================================================================
LAKE MOHAVE                     1810.0       1673.1       1668.0       1687.0   
LAKE MEAD                      26159.0      13465.0      14539.0      20450.0   
================================================================================

================================================================================
                              LOWER COLORADO RIVER BASIN
                   Watershed Snowpack Analysis - April 1, 2013
================================================================================
                                 Number of           This Year as Percent of
Watershed                        Data Sites          Last Year       Median
================================================================================
SPRING MOUNTAINS                     10                 28                 12
VIRGIN RIVER BASIN                    0                  0                  0
================================================================================

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