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 FRIDAY: FEBRUARY 28 , 2020 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 80 112 SUSITNA BASIN ................................ 3 of 5 170 168 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 57 107 SOUTHERN KENAI ............................... 3 of 6 90 129 COPPER BASIN ................................. 2 of 3 110 103 PRINCE WILLIAM SOUND ......................... 1 of 7 * 115 CHENA BASIN .................................. 1 of 7 * * UPPER TANANA ................................. 2 of 4 111 * KOYUKUK BASIN ................................ 2 of 6 * 119 CENTRAL YUKON BASIN .......................... 0 of 5 * * NORTON SOUND ................................. 0 of 4 * 94 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 88 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 0 of 3 * * ARIZONA VERDE RIVER BASIN ............................ 5 of 10 57 101 SAN FRANCISCO PEAKS .......................... 1 of 1 116 94 CENTRAL MOGOLLON RIM ......................... 3 of 4 43 105 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 69 103 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 65 101 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 71 109 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 7 of 8 95 83 TRUCKEE RIVER ................................ 11 of 12 52 52 LAKE TAHOE ................................... 11 of 11 50 52 CARSON RIVER ................................. 12 of 12 58 54 WALKER RIVER ................................. 7 of 7 44 44 COLORADO GUNNISON RIVER BASIN ......................... 13 of 16 94 78 UPPER COLORADO RIVER BASIN ................... 27 of 31 117 97 SOUTH PLATTE RIVER BASIN ..................... 17 of 22 129 114 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 12 of 12 117 109 YAMPA AND WHITE RIVER BASINS ................. 19 of 20 118 103 ARKANSAS RIVER BASIN ......................... 7 of 9 112 95 UPPER RIO GRANDE BASIN ....................... 11 of 16 98 75 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 17 of 19 90 74 IDAHO NORTHERN PANHANDLE REGION .................... 9 of 10 110 103 SPOKANE RIVER BASIN .......................... 10 of 10 108 93 CLEARWATER BASIN ............................. 15 of 16 115 94 SALMON BASIN ................................. 22 of 22 99 87 WEISER BASIN ................................. 4 of 4 95 79 PAYETTE BASIN ................................ 11 of 11 93 78 BOISE BASIN .................................. 8 of 10 86 74 BIG WOOD BASIN ............................... 8 of 9 71 61 LITTLE WOOD BASIN ............................ 5 of 5 58 52 BIG LOST BASIN ............................... 5 of 5 64 57 LITTLE LOST, BIRCH BASINS .................... 4 of 4 96 79 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 98 91 HENRYS FORK, TETON BASINS .................... 8 of 8 99 88 SNAKE BASIN ABOVE PALISADES .................. 18 of 18 109 93 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 98 83 SNAKE BASIN ABOVE AMERICAN FALLS ............. 29 of 29 105 90 RAFT BASIN ................................... 0 of 2 * * GOOSE CREEK BASIN ............................ 2 of 2 120 106 SALMON FALLS BASIN ........................... 5 of 6 110 100 BRUNEAU BASIN ................................ 5 of 6 101 99 OWYHEE BASIN ................................. 8 of 8 104 89 BEAR RIVER BASIN ............................. 15 of 15 106 93 MONTANA KOOTENAI RIVER BASIN ......................... 8 of 8 105 90 FLATHEAD RIVER BASIN ......................... 13 of 16 121 103 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 116 97 BITTERROOT RIVER BASIN ....................... 7 of 7 116 97 LOWER CLARK FORK RIVER BASIN ................. 8 of 8 105 90 JEFFERSON RIVER BASIN ........................ 19 of 19 111 102 MADISON RIVER BASIN .......................... 11 of 11 101 88 GALLATIN RIVER BASIN ......................... 7 of 7 119 114 MISSOURI HEADWATERS .......................... 31 of 31 109 99 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 116 107 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 130 110 SUN, TETON AND MARIAS RIVER BASINS ........... 5 of 6 122 95 MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21 126 105 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 130 107 UPPER YELLOWSTONE RIVER BASIN ................ 23 of 24 116 105 WIND RIVER BASIN (WYOMING) ................... 11 of 13 108 84 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 111 103 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 121 107 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 130 108 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 133 119 LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35 117 100 NEVADA NORTHERN GREAT BASIN ......................... 7 of 8 95 83 SNAKE RIVER .................................. 7 of 11 107 101 OWYHEE RIVER ................................. 5 of 5 111 93 UPPER HUMBOLDT RIVER ......................... 9 of 9 92 84 LOWER HUMBOLDT RIVER ......................... 5 of 10 95 79 CLOVER VALLEY & FRANKLIN RIVER ............... 4 of 6 85 80 EASTERN NEVADA BASINS ........................ 4 of 4 75 66 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 85 72 UPPER RIO GRANDE BASIN ....................... 9 of 9 89 71 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 110 98 JEMEZ RIVER BASIN ............................ 3 of 3 86 77 SAN FRANCISCO RIVER BASIN .................... 3 of 3 100 112 GILA RIVER BASIN ............................. 3 of 3 79 107 MIMBRES RIVER BASIN .......................... 2 of 2 1 120 PECOS RIVER BASIN ............................ 1 of 1 104 88 SAN JUAN RIVER HEADWATERS .................... 5 of 5 89 70 ANIMAS RIVER BASIN ........................... 7 of 7 94 80 CIMARRON RIVER BASIN ......................... 2 of 2 118 103 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 92 94 RIO HONDO BASIN .............................. 1 of 1 31 146 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 104 89 MALHEUR ...................................... 3 of 3 103 84 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 16 of 17 112 109 UMATILLA, WALLA WALLA, WILLOW ................ 7 of 8 125 110 JOHN DAY ..................................... 13 of 13 106 89 UPPER DESCHUTES, CROOKED ..................... 14 of 14 84 74 HOOD, SANDY, LOWER DESCHUTES ................. 7 of 8 87 87 COAST RANGE .................................. 1 of 2 * 91 WILLAMETTE ................................... 18 of 23 86 78 ROGUE, UMPQUA ................................ 12 of 12 75 69 KLAMATH ...................................... 15 of 18 69 66 LAKE COUNTY, GOOSE LAKE ...................... 9 of 9 75 67 HARNEY ....................................... 9 of 9 95 85 UTAH RAFT RIVER ................................... 0 of 2 * * BEAR RIVER ................................... 18 of 24 107 94 WEBER-OGDEN RIVERS ........................... 17 of 20 100 90 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 106 90 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 114 85 NORTHEASTERN UINTAHS ......................... 6 of 10 121 108 DUCHESNE RIVER ............................... 12 of 13 104 89 PRICE-SAN RAFAEL ............................. 6 of 11 96 91 DIRTY DEVIL .................................. 3 of 6 97 100 SOUTH EASTERN UTAH ........................... 3 of 7 * * UPPER SEVIER RIVER ........................... 12 of 17 110 94 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 86 82 ESCALANTE RIVER .............................. 3 of 4 116 100 SOUTHWESTERN UTAH ............................ 10 of 13 110 90 WASHINGTON NORTHERN PANHANDLE ........................... 9 of 10 110 103 SPOKANE ...................................... 10 of 10 108 93 UPPER COLUMBIA ............................... 5 of 6 104 88 CENTRAL COLUMBIA ............................. 7 of 8 100 99 UPPER YAKIMA ................................. 4 of 5 93 109 LOWER YAKIMA ................................. 7 of 9 114 101 LOWER SNAKE .................................. 21 of 22 112 99 LOWER COLUMBIA ............................... 17 of 22 102 95 SOUTH PUGET SOUND ............................ 7 of 10 121 116 CENTRAL PUGET SOUND .......................... 8 of 9 103 124 NORTH PUGET SOUND ............................ 8 of 12 108 103 OLYMPIC ...................................... 3 of 4 108 78 WYOMING SNAKE RIVER .................................. 20 of 20 108 91 MADISON-GALLATIN ............................. 5 of 5 94 76 YELLOWSTONE .................................. 14 of 14 113 101 WIND RIVER ................................... 10 of 12 106 83 BIGHORN BASIN ................................ 10 of 11 130 112 SHOSHONE RIVER ............................... 5 of 6 111 103 POWDER RIVER ................................. 6 of 7 133 119 TONGUE RIVER ................................. 6 of 7 130 108 BELLE FOURCHE ................................ 2 of 2 82 99 CHEYENNE RIVER BASIN ......................... 2 of 2 116 88 UPPER N. PLATTE .............................. 17 of 19 118 109 SWEETWATER ................................... 2 of 3 83 59 LOWER N. PLATTE .............................. 4 of 4 143 108 LARAMIE RIVER ................................ 7 of 7 127 111 S. PLATTE .................................... 2 of 3 117 111 LITTLE SNAKE RIVER ........................... 8 of 8 122 102 UPPER GREEN RIVER ............................ 13 of 14 108 90 LOWER GREEN RIVER ............................ 7 of 11 117 102 UPPER BEAR RIVER ............................. 8 of 10 107 94 ----------------------------------------------------------------------------- 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 Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.