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 WEDNESDAY: AUGUST 21 , 2019 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 3 of 4 * 100 SUSITNA BASIN ................................ 3 of 5 * 91 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 * 113 SOUTHERN KENAI ............................... 2 of 6 * 114 COPPER BASIN ................................. 2 of 3 * 100 PRINCE WILLIAM SOUND ......................... 1 of 7 * * CHENA BASIN .................................. 6 of 7 * 112 UPPER TANANA ................................. 2 of 4 * * KOYUKUK BASIN ................................ 2 of 6 * 115 CENTRAL YUKON BASIN .......................... 0 of 5 * 113 NORTON SOUND ................................. 0 of 4 * 147 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 115 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 3 * 86 ARIZONA VERDE RIVER BASIN ............................ 5 of 10 * 116 SAN FRANCISCO PEAKS .......................... 1 of 1 * 124 CENTRAL MOGOLLON RIM ......................... 3 of 4 * 108 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 * 110 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 * 104 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 * 84 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 2 of 5 * * TRUCKEE RIVER ................................ 7 of 9 * 123 LAKE TAHOE ................................... 8 of 8 * 129 CARSON RIVER ................................. 9 of 9 * 123 WALKER RIVER ................................. 7 of 7 * 132 KLAMATH ...................................... 15 of 18 * 97 COLORADO GUNNISON RIVER BASIN ......................... 11 of 16 * 123 UPPER COLORADO RIVER BASIN ................... 25 of 31 * 115 SOUTH PLATTE RIVER BASIN ..................... 16 of 22 * 110 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 12 of 12 * 117 YAMPA AND WHITE RIVER BASINS ................. 18 of 20 * 115 ARKANSAS RIVER BASIN ......................... 7 of 9 * 110 UPPER RIO GRANDE BASIN ....................... 11 of 16 * 118 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 16 of 19 * 120 IDAHO NORTHERN PANHANDLE REGION .................... 8 of 10 * 79 SPOKANE RIVER BASIN .......................... 6 of 10 * 84 CLEARWATER BASIN ............................. 11 of 16 * 92 SALMON BASIN ................................. 18 of 22 * 99 WEISER BASIN ................................. 4 of 4 * 116 PAYETTE BASIN ................................ 10 of 11 * 104 BOISE BASIN .................................. 8 of 10 * 107 BIG WOOD BASIN ............................... 7 of 9 * 106 LITTLE WOOD BASIN ............................ 5 of 5 * 118 BIG LOST BASIN ............................... 5 of 5 * 112 LITTLE LOST, BIRCH BASINS .................... 2 of 4 * 101 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 2 of 4 * 95 HENRYS FORK, TETON BASINS .................... 8 of 8 * 111 SNAKE BASIN ABOVE PALISADES .................. 17 of 18 * 101 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 * 113 SNAKE BASIN ABOVE AMERICAN FALLS ............. 28 of 29 * 106 RAFT BASIN ................................... 1 of 2 * 115 GOOSE CREEK BASIN ............................ 2 of 2 * 130 SALMON FALLS BASIN ........................... 5 of 6 * 126 BRUNEAU BASIN ................................ 5 of 6 * 124 OWYHEE BASIN ................................. 8 of 8 * 118 BEAR RIVER BASIN ............................. 14 of 15 * 109 MONTANA KOOTENAI RIVER BASIN ......................... 4 of 8 * 76 FLATHEAD RIVER BASIN ......................... 9 of 16 * 90 UPPER CLARK FORK RIVER BASIN ................. 9 of 15 * 92 BITTERROOT RIVER BASIN ....................... 5 of 7 * 89 LOWER CLARK FORK RIVER BASIN ................. 6 of 8 * 89 JEFFERSON RIVER BASIN ........................ 17 of 19 * 98 MADISON RIVER BASIN .......................... 11 of 11 * 105 GALLATIN RIVER BASIN ......................... 5 of 7 * 111 MISSOURI HEADWATERS .......................... 27 of 31 * 103 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 * 102 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 6 of 10 * 103 SUN, TETON AND MARIAS RIVER BASINS ........... 3 of 6 * 93 MISSOURI MAINSTEM RIVER BASIN ................ 14 of 21 * 100 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 * 84 UPPER YELLOWSTONE RIVER BASIN ................ 16 of 24 * 105 WIND RIVER BASIN (WYOMING) ................... 9 of 13 * 95 SHOSHONE RIVER BASIN (WYOMING) ............... 4 of 6 * 110 BIGHORN RIVER BASIN (WYOMING) ................ 14 of 16 * 104 TONGUE RIVER BASIN (WYOMING) ................. 5 of 7 * 103 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 * 100 LOWER YELLOWSTONE RIVER BASIN ................ 27 of 35 * 101 NEVADA NORTHERN GREAT BASIN ......................... 5 of 9 * * SNAKE RIVER .................................. 7 of 11 * 126 OWYHEE RIVER ................................. 5 of 5 * 119 UPPER HUMBOLDT RIVER ......................... 8 of 9 * 128 LOWER HUMBOLDT RIVER ......................... 5 of 9 * * CLOVER VALLEY & FRANKLIN RIVER ............... 3 of 6 * 136 EASTERN NEVADA BASINS ........................ 3 of 4 * 141 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 * 120 UPPER RIO GRANDE BASIN ....................... 9 of 9 * 120 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 * 107 JEMEZ RIVER BASIN ............................ 1 of 3 * 111 SAN FRANCISCO RIVER BASIN .................... 3 of 3 * 78 GILA RIVER BASIN ............................. 3 of 3 * 70 MIMBRES RIVER BASIN .......................... 2 of 2 * 74 PECOS RIVER BASIN ............................ 1 of 1 * 106 SAN JUAN RIVER HEADWATERS .................... 5 of 5 * 119 ANIMAS RIVER BASIN ........................... 7 of 7 * 124 CIMARRON RIVER BASIN ......................... 2 of 2 * 117 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 * 87 RIO HONDO BASIN .............................. 1 of 1 * 101 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 118 MALHEUR ...................................... 3 of 3 * 115 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 14 of 17 * 108 UMATILLA, WALLA WALLA, WILLOW ................ 6 of 8 * 112 JOHN DAY ..................................... 9 of 13 * 113 UPPER DESCHUTES, CROOKED ..................... 13 of 14 * 91 HOOD, SANDY, LOWER DESCHUTES ................. 7 of 8 * 81 COAST RANGE .................................. 1 of 2 * 75 WILLAMETTE ................................... 18 of 23 * 87 ROGUE, UMPQUA ................................ 12 of 12 * 94 KLAMATH ...................................... 15 of 18 * 97 LAKE COUNTY, GOOSE LAKE ...................... 7 of 9 * 109 HARNEY ....................................... 5 of 9 * 113 UTAH RAFT RIVER ................................... 1 of 2 * 115 BEAR RIVER ................................... 17 of 24 * 110 WEBER-OGDEN RIVERS ........................... 15 of 20 * 119 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 * 126 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 * 128 NORTHEASTERN UINTAHS ......................... 4 of 10 * 112 DUCHESNE RIVER ............................... 11 of 13 * 130 PRICE-SAN RAFAEL ............................. 6 of 11 * 133 DIRTY DEVIL .................................. 2 of 6 * 127 SOUTH EASTERN UTAH ........................... 3 of 7 * * UPPER SEVIER RIVER ........................... 11 of 17 * 133 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 0 of 3 * * BEAVER RIVER ................................. 2 of 2 * 147 ESCALANTE RIVER .............................. 2 of 4 * 134 SOUTHWESTERN UTAH ............................ 10 of 13 * 138 WASHINGTON NORTHERN PANHANDLE ........................... 8 of 10 * 79 SPOKANE ...................................... 6 of 10 * 84 UPPER COLUMBIA ............................... 5 of 6 * 82 CENTRAL COLUMBIA ............................. 6 of 8 * 86 UPPER YAKIMA ................................. 4 of 5 * 81 LOWER YAKIMA ................................. 7 of 9 * 84 LOWER SNAKE .................................. 18 of 22 * 97 LOWER COLUMBIA ............................... 17 of 22 * 80 SOUTH PUGET SOUND ............................ 7 of 10 * 83 CENTRAL PUGET SOUND .......................... 9 of 9 * 86 NORTH PUGET SOUND ............................ 8 of 12 * 84 OLYMPIC ...................................... 3 of 4 * 84 WYOMING SNAKE RIVER .................................. 18 of 20 * 103 MADISON-GALLATIN ............................. 5 of 5 * 109 YELLOWSTONE .................................. 12 of 14 * 106 WIND RIVER ................................... 9 of 12 * 95 BIGHORN BASIN ................................ 10 of 11 * 101 SHOSHONE RIVER ............................... 4 of 6 * 110 POWDER RIVER ................................. 6 of 7 * 100 TONGUE RIVER ................................. 5 of 7 * 103 BELLE FOURCHE ................................ 2 of 2 * 111 CHEYENNE RIVER BASIN ......................... 1 of 2 * 88 UPPER N. PLATTE .............................. 17 of 19 * 112 SWEETWATER ................................... 3 of 3 * 85 LOWER N. PLATTE .............................. 3 of 4 * 109 LARAMIE RIVER ................................ 7 of 7 * 109 S. PLATTE .................................... 2 of 3 * 100 LITTLE SNAKE RIVER ........................... 7 of 8 * 109 UPPER GREEN RIVER ............................ 13 of 14 * 100 LOWER GREEN RIVER ............................ 5 of 11 * * UPPER BEAR RIVER ............................. 8 of 10 * 107 ----------------------------------------------------------------------------- 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.