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 MONDAY: OCTOBER 21 , 2019 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 0 of 4 * * SUSITNA BASIN ................................ 0 of 5 * * NORTHERN KENAI MOUNTAINS ..................... 0 of 7 * * SOUTHERN KENAI ............................... 0 of 6 * * COPPER BASIN ................................. 0 of 3 * * PRINCE WILLIAM SOUND ......................... 0 of 7 * * CHENA BASIN .................................. 0 of 7 * * UPPER TANANA ................................. 0 of 4 * * KOYUKUK BASIN ................................ 0 of 6 * * CENTRAL YUKON BASIN .......................... 0 of 5 * * NORTON SOUND ................................. 0 of 4 * * KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * * NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 0 of 3 * * ARIZONA VERDE RIVER BASIN ............................ 5 of 10 * * SAN FRANCISCO PEAKS .......................... 1 of 1 * 23 CENTRAL MOGOLLON RIM ......................... 3 of 4 * 11 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 * 11 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 * * SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 * 19 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 3 of 5 * 97 TRUCKEE RIVER ................................ 8 of 9 * 34 LAKE TAHOE ................................... 8 of 8 * 16 CARSON RIVER ................................. 9 of 9 * 9 WALKER RIVER ................................. 7 of 7 * 8 KLAMATH ...................................... 16 of 18 * 98 COLORADO GUNNISON RIVER BASIN ......................... 11 of 16 226* 25 UPPER COLORADO RIVER BASIN ................... 27 of 31 307* 64 SOUTH PLATTE RIVER BASIN ..................... 15 of 22 189* 66 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 10 of 12 252* 91 YAMPA AND WHITE RIVER BASINS ................. 16 of 20 476* 88 ARKANSAS RIVER BASIN ......................... 7 of 9 121* 33 UPPER RIO GRANDE BASIN ....................... 11 of 16 92* * SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 16 of 19 67* 12 IDAHO NORTHERN PANHANDLE REGION .................... 10 of 10 2483* 145 SPOKANE RIVER BASIN .......................... 9 of 10 1800* 154 CLEARWATER BASIN ............................. 13 of 16 3650* 154 SALMON BASIN ................................. 22 of 22 849* 151 WEISER BASIN ................................. 4 of 4 * 145 PAYETTE BASIN ................................ 11 of 11 * 158 BOISE BASIN .................................. 9 of 10 2350* 130 BIG WOOD BASIN ............................... 8 of 9 * 109 LITTLE WOOD BASIN ............................ 5 of 5 311* 78 BIG LOST BASIN ............................... 5 of 5 411* 90 LITTLE LOST, BIRCH BASINS .................... 4 of 4 683* 100 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 650* 127 HENRYS FORK, TETON BASINS .................... 8 of 8 334* 120 SNAKE BASIN ABOVE PALISADES .................. 17 of 18 519* 113 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 * 113 SNAKE BASIN ABOVE AMERICAN FALLS ............. 28 of 29 414* 110 RAFT BASIN ................................... 1 of 2 * 140 GOOSE CREEK BASIN ............................ 2 of 2 * 111 SALMON FALLS BASIN ........................... 5 of 6 900* 100 BRUNEAU BASIN ................................ 5 of 6 900* 114 OWYHEE BASIN ................................. 8 of 8 * 90 BEAR RIVER BASIN ............................. 15 of 15 2329* 105 MONTANA KOOTENAI RIVER BASIN ......................... 8 of 8 771* 127 FLATHEAD RIVER BASIN ......................... 13 of 16 484* 119 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 226* 90 BITTERROOT RIVER BASIN ....................... 7 of 7 840* 134 LOWER CLARK FORK RIVER BASIN ................. 8 of 8 1467* 139 JEFFERSON RIVER BASIN ........................ 19 of 19 277* 112 MADISON RIVER BASIN .......................... 11 of 11 216* 103 GALLATIN RIVER BASIN ......................... 7 of 7 228* 115 MISSOURI HEADWATERS .......................... 31 of 31 276* 113 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 222* 97 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 323* 95 SUN, TETON AND MARIAS RIVER BASINS ........... 5 of 6 1612* 118 MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21 457* 102 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 350* 101 UPPER YELLOWSTONE RIVER BASIN ................ 22 of 24 240* 116 WIND RIVER BASIN (WYOMING) ................... 11 of 13 171* 54 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 280* 142 BIGHORN RIVER BASIN (WYOMING) ................ 14 of 16 218* 116 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 146* 73 POWDER RIVER BASIN (WYOMING) ................. 5 of 7 244* 127 LOWER YELLOWSTONE RIVER BASIN ................ 29 of 35 191* 89 NEVADA NORTHERN GREAT BASIN ......................... 6 of 9 * 89 SNAKE RIVER .................................. 7 of 11 1200* 113 OWYHEE RIVER ................................. 5 of 5 * 100 UPPER HUMBOLDT RIVER ......................... 9 of 9 * 73 LOWER HUMBOLDT RIVER ......................... 5 of 9 * 62 CLOVER VALLEY & FRANKLIN RIVER ............... 4 of 6 * 74 EASTERN NEVADA BASINS ........................ 3 of 4 * 10 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 * 9 UPPER RIO GRANDE BASIN ....................... 9 of 9 54* * SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 8 of 11 * 63 JEMEZ RIVER BASIN ............................ 2 of 3 * 39 SAN FRANCISCO RIVER BASIN .................... 3 of 3 * 12 GILA RIVER BASIN ............................. 3 of 3 * 24 MIMBRES RIVER BASIN .......................... 2 of 2 * 71 PECOS RIVER BASIN ............................ 1 of 1 * 100 SAN JUAN RIVER HEADWATERS .................... 5 of 5 32* * ANIMAS RIVER BASIN ........................... 7 of 7 83* 12 CIMARRON RIVER BASIN ......................... 1 of 2 * 32 ZUNI/BLUEWATER RIVER BASIN ................... 0 of 1 * * RIO HONDO BASIN .............................. 1 of 1 * 100 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 90 MALHEUR ...................................... 3 of 3 * 176 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 15 of 17 * 188 UMATILLA, WALLA WALLA, WILLOW ................ 6 of 8 * 218 JOHN DAY ..................................... 12 of 13 * 143 UPPER DESCHUTES, CROOKED ..................... 13 of 14 * 147 HOOD, SANDY, LOWER DESCHUTES ................. 5 of 8 * 201 COAST RANGE .................................. 1 of 2 * 156 WILLAMETTE ................................... 18 of 23 * 155 ROGUE, UMPQUA ................................ 12 of 12 * 109 KLAMATH ...................................... 16 of 18 * 98 LAKE COUNTY, GOOSE LAKE ...................... 8 of 9 * 75 HARNEY ....................................... 6 of 9 * 172 UTAH RAFT RIVER ................................... 1 of 2 * 140 BEAR RIVER ................................... 18 of 24 2857* 102 WEBER-OGDEN RIVERS ........................... 17 of 20 2850* 65 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 7100* 64 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 * 67 NORTHEASTERN UINTAHS ......................... 6 of 10 286* 55 DUCHESNE RIVER ............................... 12 of 13 341* 43 PRICE-SAN RAFAEL ............................. 6 of 11 * 38 DIRTY DEVIL .................................. 3 of 6 * 47 SOUTH EASTERN UTAH ........................... 3 of 7 * * UPPER SEVIER RIVER ........................... 12 of 17 340* 19 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 0* 19 ESCALANTE RIVER .............................. 3 of 4 * 12 SOUTHWESTERN UTAH ............................ 10 of 13 * 5 WASHINGTON NORTHERN PANHANDLE ........................... 10 of 10 2483* 145 SPOKANE ...................................... 9 of 10 1800* 154 UPPER COLUMBIA ............................... 5 of 6 1433* 126 CENTRAL COLUMBIA ............................. 5 of 8 2600* 143 UPPER YAKIMA ................................. 4 of 5 * 164 LOWER YAKIMA ................................. 4 of 9 * 197 LOWER SNAKE .................................. 18 of 22 4900* 171 LOWER COLUMBIA ............................... 14 of 22 * 178 SOUTH PUGET SOUND ............................ 6 of 10 * 148 CENTRAL PUGET SOUND .......................... 8 of 9 * 137 NORTH PUGET SOUND ............................ 8 of 12 2600* 106 OLYMPIC ...................................... 2 of 4 * 78 WYOMING SNAKE RIVER .................................. 19 of 20 323* 105 MADISON-GALLATIN ............................. 5 of 5 400* 120 YELLOWSTONE .................................. 13 of 14 250* 115 WIND RIVER ................................... 10 of 12 166* 52 BIGHORN BASIN ................................ 9 of 11 186* 99 SHOSHONE RIVER ............................... 5 of 6 280* 142 POWDER RIVER ................................. 5 of 7 244* 127 TONGUE RIVER ................................. 6 of 7 146* 73 BELLE FOURCHE ................................ 0 of 2 * 100 CHEYENNE RIVER BASIN ......................... 0 of 2 * 116 UPPER N. PLATTE .............................. 16 of 19 248* 99 SWEETWATER ................................... 3 of 3 93* 39 LOWER N. PLATTE .............................. 4 of 4 822* 114 LARAMIE RIVER ................................ 6 of 7 486* 94 S. PLATTE .................................... 1 of 3 * * LITTLE SNAKE RIVER ........................... 8 of 8 481* 83 UPPER GREEN RIVER ............................ 13 of 14 262* 78 LOWER GREEN RIVER ............................ 7 of 11 306* 72 UPPER BEAR RIVER ............................. 8 of 10 933* 89 ----------------------------------------------------------------------------- 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.