United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of THURSDAY: MAY 23 , 2013 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 158 101 SUSITNA BASIN ................................ 3 of 6 537* 118 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 153* 77 SOUTHERN KENAI ............................... 3 of 6 622* 71 COPPER BASIN ................................. 3 of 4 360 93 PRINCE WILLIAM SOUND ......................... 0 of 6 * 94 CHENA BASIN .................................. 5 of 7 1029* 98 UPPER TANANA ................................. 2 of 4 * 69 KOYUKUK BASIN ................................ 2 of 4 * 66 CENTRAL YUKON BASIN .......................... 0 of 4 * 97 SEWARD PENINSULA ............................. 0 of 2 * 73 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 103 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 2 201 98 ARIZONA VERDE RIVER BASIN ............................ 4 of 10 * 82 SAN FRANCISCO PEAKS .......................... 1 of 1 * 79 CENTRAL MOGOLLON RIM ......................... 3 of 4 * 96 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 * 92 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 8 * 80 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 * 64 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 2 of 5 * 74 TRUCKEE RIVER ................................ 8 of 8 25* 74 LAKE TAHOE ................................... 8 of 8 0* 84 CARSON RIVER ................................. 9 of 9 1* 74 WALKER RIVER ................................. 6 of 6 49 75 KLAMATH ...................................... 16 of 18 16* 86 COLORADO GUNNISON RIVER BASIN ......................... 13 of 16 59* 76 UPPER COLORADO RIVER BASIN ................... 27 of 31 112* 91 SOUTH PLATTE RIVER BASIN ..................... 16 of 20 127 96 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 12 of 12 83 96 YAMPA AND WHITE RIVER BASINS ................. 19 of 20 75* 87 ARKANSAS RIVER BASIN ......................... 6 of 9 72* 76 UPPER RIO GRANDE BASIN ....................... 11 of 16 24* 68 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 16 of 18 18* 68 IDAHO NORTHERN PANHANDLE REGION .................... 10 of 10 89 113 SPOKANE RIVER BASIN .......................... 10 of 10 76 100 CLEARWATER BASIN ............................. 15 of 16 76 98 SALMON BASIN ................................. 21 of 22 42 87 WEISER BASIN ................................. 4 of 4 * 90 PAYETTE BASIN ................................ 11 of 11 18 88 BOISE BASIN .................................. 10 of 10 32 78 BIG WOOD BASIN ............................... 9 of 9 45 83 LITTLE WOOD BASIN ............................ 5 of 5 37* 82 BIG LOST BASIN ............................... 5 of 5 32 83 LITTLE LOST, BIRCH BASINS .................... 4 of 4 59 83 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 58 83 HENRYS FORK, TETON BASINS .................... 8 of 8 46 88 SNAKE BASIN ABOVE PALISADES .................. 18 of 18 52 87 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 0* 89 SNAKE BASIN ABOVE AMERICAN FALLS ............. 29 of 29 54* 88 RAFT BASIN ................................... 1 of 2 0 89 GOOSE CREEK BASIN ............................ 2 of 2 * 92 SALMON FALLS BASIN ........................... 5 of 5 33* 90 BRUNEAU BASIN ................................ 5 of 5 33* 85 OWYHEE BASIN ................................. 8 of 8 * 78 BEAR RIVER BASIN ............................. 15 of 15 41* 84 MONTANA KOOTENAI RIVER BASIN ......................... 8 of 8 82 111 FLATHEAD RIVER BASIN ......................... 13 of 16 95* 113 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 63 92 BITTERROOT RIVER BASIN ....................... 7 of 7 48 94 LOWER CLARK FORK RIVER BASIN ................. 8 of 8 80 105 JEFFERSON RIVER BASIN ........................ 19 of 19 54 85 MADISON RIVER BASIN .......................... 11 of 11 58 88 GALLATIN RIVER BASIN ......................... 7 of 7 71 98 MISSOURI HEADWATERS .......................... 31 of 31 56 88 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 37 97 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 43 96 SUN, TETON AND MARIAS RIVER BASINS ........... 5 of 6 78* 105 MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21 53* 100 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 109* 120 UPPER YELLOWSTONE RIVER BASIN ................ 23 of 24 58 91 WIND RIVER BASIN (WYOMING) ................... 12 of 13 44 79 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 48 95 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 56 94 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 69 86 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 89* 97 LOWER YELLOWSTONE RIVER BASIN ................ 31 of 35 57 87 NEVADA NORTHERN GREAT BASIN ......................... 2 of 5 * 74 SNAKE RIVER .................................. 3 of 3 33 84 OWYHEE RIVER ................................. 5 of 6 * 77 UPPER HUMBOLDT RIVER ......................... 5 of 5 220* 73 LOWER HUMBOLDT RIVER ......................... 5 of 7 17* 75 CLOVER VALLEY ................................ 1 of 1 * 65 EASTERN NEVADA ............................... 2 of 8 * * NEW MEXICO RIO CHAMA RIVER BASIN ........................ 2 of 4 * 62 UPPER RIO GRANDE BASIN ....................... 8 of 9 19* 69 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 9 6* 62 JEMEZ RIVER BASIN ............................ 2 of 3 * 53 SAN FRANCISCO RIVER BASIN .................... 3 of 3 * 65 GILA RIVER BASIN ............................. 3 of 3 * 56 MIMBRES RIVER BASIN .......................... 2 of 2 * 46 PECOS RIVER BASIN ............................ 1 of 1 0* 53 SAN JUAN RIVER HEADWATERS .................... 5 of 5 19 70 ANIMAS RIVER BASIN ........................... 7 of 7 9* 66 CIMARRON RIVER BASIN ......................... 2 of 2 * 63 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 * 69 RIO HONDO BASIN .............................. 1 of 1 * * CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 78 MALHEUR ...................................... 3 of 3 * 85 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 15 of 17 56* 94 UMATILLA, WALLA WALLA, WILLOW ................ 6 of 8 3* 96 JOHN DAY ..................................... 12 of 13 * 87 UPPER DESCHUTES, CROOKED ..................... 13 of 14 52* 92 HOOD, SANDY, LOWER DESCHUTES ................. 6 of 8 59* 101 COAST RANGE .................................. 1 of 2 * 90 WILLAMETTE ................................... 18 of 23 55* 94 ROGUE, UMPQUA ................................ 12 of 12 36 92 KLAMATH ...................................... 16 of 18 16* 86 LAKE COUNTY, GOOSE LAKE ...................... 7 of 9 * 81 HARNEY ....................................... 8 of 9 * 82 UTAH RAFT RIVER ................................... 1 of 2 0 89 BEAR RIVER ................................... 18 of 24 33* 83 WEBER-OGDEN RIVERS ........................... 17 of 20 32* 79 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 41* 79 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 147* 82 NORTHEASTERN UINTAHS ......................... 6 of 10 80* 93 DUCHESNE RIVER ............................... 12 of 13 71* 79 PRICE-SAN RAFAEL ............................. 6 of 10 104* 83 DIRTY DEVIL .................................. 3 of 4 * 80 SOUTH EASTERN UTAH ........................... 3 of 5 * 77 UPPER SEVIER RIVER ........................... 13 of 17 80* 81 SAN PITCH RIVER .............................. 4 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 74 77 ESCALANTE RIVER .............................. 3 of 3 * 83 SOUTHWESTERN UTAH ............................ 9 of 12 20* 70 WASHINGTON NORTHERN PANHANDLE ........................... 10 of 10 89 113 SPOKANE ...................................... 10 of 10 76 100 UPPER COLUMBIA ............................... 5 of 6 98* 110 CENTRAL COLUMBIA ............................. 7 of 8 89* 102 UPPER YAKIMA ................................. 5 of 5 84 101 LOWER YAKIMA ................................. 7 of 9 77 100 LOWER SNAKE .................................. 21 of 22 73 97 LOWER COLUMBIA ............................... 15 of 22 108* 104 SOUTH PUGET SOUND ............................ 7 of 10 115* 108 CENTRAL PUGET SOUND .......................... 8 of 9 144 111 NORTH PUGET SOUND ............................ 8 of 12 109 107 OLYMPIC ...................................... 3 of 4 128 101 WYOMING SNAKE RIVER .................................. 20 of 20 55 87 MADISON-GALLATIN ............................. 5 of 5 43 84 YELLOWSTONE .................................. 13 of 13 61 90 WIND RIVER ................................... 11 of 12 49 80 BIGHORN BASIN ................................ 10 of 11 65 93 SHOSHONE RIVER ............................... 4 of 5 56 94 POWDER RIVER ................................. 6 of 7 89* 97 TONGUE RIVER ................................. 6 of 7 69 86 BELLE FOURCHE ................................ 1 of 1 * 91 CHEYENNE RIVER BASIN ......................... 2 of 2 * 98 UPPER N. PLATTE .............................. 15 of 18 83 89 SWEETWATER ................................... 2 of 3 35 64 LOWER N. PLATTE .............................. 4 of 4 73* 82 LARAMIE RIVER ................................ 6 of 6 85 89 S. PLATTE .................................... 2 of 3 99* 91 LITTLE SNAKE RIVER ........................... 7 of 8 69* 82 UPPER GREEN RIVER ............................ 12 of 13 57* 82 LOWER GREEN RIVER ............................ 7 of 11 66* 89 UPPER BEAR RIVER ............................. 7 of 9 46* 81 ----------------------------------------------------------------------------- The Snow Water Equivalent Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The Accumulated Precipitation Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. * = Data are not available or data may not provide a valid measure of conditions for over half of the sites within the basin. Refer to the individual state reports for a complete data listing and basin analysis. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values Reference period for comparison of conditions is 1981-2010. Provisional data, subject to revision.