United States Department of Agriculture
Natural Resources Conservation Service
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National Water and Climate Center

Map Products

Snow

SNOTEL & Snow Course
Snow Water Equivalent
 
1st of Month
 
Note: These maps are discontinued after May 2018 due to resource constraints.
West-wide point map
  % of Normal  
Regional point maps
  % of Normal by region:
Alaska
Arkansas, Colorado and Rio Grande Basins
Columbia Basin
Great Basin and California
Missouri Basin  
 
SNOTEL
Snow Water Equivalent
Current
1st of Month
 
West-wide point maps

% of Normal

% or Normal
 
 
State point maps  
 % of Normal
  
 % of Normal
  
 
 
Basin filled maps
 % of Normal

% of Normal

 % of Normal
 


 

 
NEW! Interactive Map Percentile
Records
   
SNOTEL
Snow Depth
Current
1st of Month
Change
NEW! Interactive map  Snow Depth    1 Day
 3 Day
 7 Day
SNOTEL
Snow Density
Current
1st of Month
 
NEW! Interactive map  Snow Density

 

Definitions:

Snow Water Equivalent (SWE): The liquid water equivalent of the snowpack, expressed in terms of depth.
Water Year: October 1 to September 30
Normal: The 1981-2010 median.
% of Normal: The current value as percent of the current date’s normal.
% of Normal Peak:
The current value as % of the normal seasonal peak for the year.  
Percentile: Ranking with respect to data on the same day of the year for other years in the period of record. The ranking percentile is equal to the fraction of available years whose value is less than the current year’s value. 100% means that all other years are less than the present value. 0% means that all other years are greater than or equal to the present value.
Record: A “new record high” means that the current value is now the highest value on record. A “near record high” means that the current value is exceeded or tied by only one other value on record. This is not necessarily an all-season record.
SNOTEL (SNOw TELemetry):  An automated near real-time data collection network that provides mid to high elevation hydroclimatic data from mountainous regions of the western United States.  A standard SNOTEL station provides snow water equivalent, snow depth, precipitation, and temperature data.  The SNOTEL network is maintained by the USDA Natural Resources Conservation Service Snow Survey and Water Supply Forecasting Program.
 

Disclaimer:

Data are provisional and subject to revision