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: AUGUST 23 , 2019 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 3 of 4 * 99 SUSITNA BASIN ................................ 3 of 5 * 90 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 * 112 SOUTHERN KENAI ............................... 2 of 6 * 114 COPPER BASIN ................................. 2 of 3 * 99 PRINCE WILLIAM SOUND ......................... 1 of 7 * * CHENA BASIN .................................. 6 of 7 * 113 UPPER TANANA ................................. 2 of 4 * * KOYUKUK BASIN ................................ 2 of 6 * 114 CENTRAL YUKON BASIN .......................... 0 of 5 * 113 NORTON SOUND ................................. 0 of 4 * * 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 * 114 SAN FRANCISCO PEAKS .......................... 1 of 1 * 124 CENTRAL MOGOLLON RIM ......................... 3 of 4 * 107 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 * 109 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 * 102 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 * 83 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 3 of 5 * 109 TRUCKEE RIVER ................................ 7 of 9 * 122 LAKE TAHOE ................................... 8 of 8 * 129 CARSON RIVER ................................. 9 of 9 * 122 WALKER RIVER ................................. 7 of 7 * 132 KLAMATH ...................................... 15 of 18 * 97 COLORADO GUNNISON RIVER BASIN ......................... 12 of 16 * 122 UPPER COLORADO RIVER BASIN ................... 25 of 31 * 114 SOUTH PLATTE RIVER BASIN ..................... 15 of 22 * 109 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 12 of 12 * 117 YAMPA AND WHITE RIVER BASINS ................. 19 of 20 * 114 ARKANSAS RIVER BASIN ......................... 7 of 9 * 110 UPPER RIO GRANDE BASIN ....................... 10 of 16 * 117 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 16 of 19 * 119 IDAHO NORTHERN PANHANDLE REGION .................... 8 of 10 * 81 SPOKANE RIVER BASIN .......................... 9 of 10 * 85 CLEARWATER BASIN ............................. 12 of 16 * 92 SALMON BASIN ................................. 19 of 22 * 98 WEISER BASIN ................................. 4 of 4 * 116 PAYETTE BASIN ................................ 10 of 11 * 104 BOISE BASIN .................................. 8 of 10 * 107 BIG WOOD BASIN ............................... 7 of 9 * 105 LITTLE WOOD BASIN ............................ 5 of 5 * 117 BIG LOST BASIN ............................... 5 of 5 * 112 LITTLE LOST, BIRCH BASINS .................... 3 of 4 * 101 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 3 of 4 * 94 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 * 114 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 ......................... 7 of 8 * 75 FLATHEAD RIVER BASIN ......................... 11 of 16 * 87 UPPER CLARK FORK RIVER BASIN ................. 10 of 15 * 93 BITTERROOT RIVER BASIN ....................... 5 of 7 * 89 LOWER CLARK FORK RIVER BASIN ................. 7 of 8 * 88 JEFFERSON RIVER BASIN ........................ 17 of 19 * 97 MADISON RIVER BASIN .......................... 11 of 11 * 105 GALLATIN RIVER BASIN ......................... 5 of 7 * 111 MISSOURI HEADWATERS .......................... 27 of 31 * 102 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 * 102 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 6 of 10 * 102 SUN, TETON AND MARIAS RIVER BASINS ........... 3 of 6 * 93 MISSOURI MAINSTEM RIVER BASIN ................ 14 of 21 * 99 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 * 85 UPPER YELLOWSTONE RIVER BASIN ................ 16 of 24 * 105 WIND RIVER BASIN (WYOMING) ................... 10 of 13 * 95 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 * 108 BIGHORN RIVER BASIN (WYOMING) ................ 14 of 16 * 104 TONGUE RIVER BASIN (WYOMING) ................. 4 of 7 * 103 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 * 101 LOWER YELLOWSTONE RIVER BASIN ................ 27 of 35 * 101 NEVADA NORTHERN GREAT BASIN ......................... 6 of 9 * 108 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 * 115 CLOVER VALLEY & FRANKLIN RIVER ............... 3 of 6 * 136 EASTERN NEVADA BASINS ........................ 3 of 4 * 141 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 * 119 UPPER RIO GRANDE BASIN ....................... 8 of 9 * 119 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 * 107 JEMEZ RIVER BASIN ............................ 1 of 3 * 110 SAN FRANCISCO RIVER BASIN .................... 3 of 3 * 77 GILA RIVER BASIN ............................. 3 of 3 * 70 MIMBRES RIVER BASIN .......................... 2 of 2 * 77 PECOS RIVER BASIN ............................ 1 of 1 * 107 SAN JUAN RIVER HEADWATERS .................... 5 of 5 * 118 ANIMAS RIVER BASIN ........................... 7 of 7 * 123 CIMARRON RIVER BASIN ......................... 2 of 2 * 118 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 * 85 RIO HONDO BASIN .............................. 0 of 1 * 100 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 118 MALHEUR ...................................... 3 of 3 * 114 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 * 92 HOOD, SANDY, LOWER DESCHUTES ................. 7 of 8 * 81 COAST RANGE .................................. 1 of 2 * 75 WILLAMETTE ................................... 18 of 23 * 87 ROGUE, UMPQUA ................................ 12 of 12 * 95 KLAMATH ...................................... 15 of 18 * 97 LAKE COUNTY, GOOSE LAKE ...................... 7 of 9 * 109 HARNEY ....................................... 6 of 9 * 112 UTAH RAFT RIVER ................................... 1 of 2 * 114 BEAR RIVER ................................... 17 of 24 * 108 WEBER-OGDEN RIVERS ........................... 14 of 20 * 118 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 * 126 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 * 128 NORTHEASTERN UINTAHS ......................... 4 of 10 * 111 DUCHESNE RIVER ............................... 11 of 13 * 129 PRICE-SAN RAFAEL ............................. 6 of 11 * 132 DIRTY DEVIL .................................. 3 of 6 * 127 SOUTH EASTERN UTAH ........................... 3 of 7 * * UPPER SEVIER RIVER ........................... 11 of 17 * 132 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 0 of 3 * * BEAVER RIVER ................................. 2 of 2 * 146 ESCALANTE RIVER .............................. 3 of 4 * 134 SOUTHWESTERN UTAH ............................ 10 of 13 * 138 WASHINGTON NORTHERN PANHANDLE ........................... 8 of 10 * 81 SPOKANE ...................................... 9 of 10 * 85 UPPER COLUMBIA ............................... 4 of 6 * 81 CENTRAL COLUMBIA ............................. 5 of 8 * 86 UPPER YAKIMA ................................. 4 of 5 * 81 LOWER YAKIMA ................................. 5 of 9 * * LOWER SNAKE .................................. 20 of 22 * 97 LOWER COLUMBIA ............................... 16 of 22 * 81 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 .................................. 19 of 20 * 102 MADISON-GALLATIN ............................. 4 of 5 * 108 YELLOWSTONE .................................. 12 of 14 * 105 WIND RIVER ................................... 9 of 12 * 95 BIGHORN BASIN ................................ 9 of 11 * 102 SHOSHONE RIVER ............................... 5 of 6 * 108 POWDER RIVER ................................. 6 of 7 * 101 TONGUE RIVER ................................. 4 of 7 * 103 BELLE FOURCHE ................................ 2 of 2 * 110 CHEYENNE RIVER BASIN ......................... 1 of 2 * 87 UPPER N. PLATTE .............................. 17 of 19 * 112 SWEETWATER ................................... 3 of 3 * 85 LOWER N. PLATTE .............................. 4 of 4 * 107 LARAMIE RIVER ................................ 7 of 7 * 109 S. PLATTE .................................... 2 of 3 * 99 LITTLE SNAKE RIVER ........................... 8 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.