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 SUNDAY: OCTOBER 22 , 2017 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 80* 97 SUSITNA BASIN ................................ 3 of 5 82* 123 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 79* 90 SOUTHERN KENAI ............................... 3 of 6 * 74 COPPER BASIN ................................. 2 of 3 200* 93 PRINCE WILLIAM SOUND ......................... 1 of 7 * 98 CHENA BASIN .................................. 5 of 7 169 231 UPPER TANANA ................................. 2 of 5 * * KOYUKUK BASIN ................................ 2 of 6 * 79 CENTRAL YUKON BASIN .......................... 0 of 5 * 261 NORTON SOUND ................................. 0 of 4 * 255 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 170 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 3 * 72 ARIZONA VERDE RIVER BASIN ............................ 5 of 10 * * SAN FRANCISCO PEAKS .......................... 1 of 1 * 0 CENTRAL MOGOLLON RIM ......................... 3 of 4 * 3 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 * 2 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 6 of 9 * * SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 6 of 8 * 13 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 3 of 5 * 116 TRUCKEE RIVER ................................ 8 of 9 * 71 LAKE TAHOE ................................... 8 of 8 * 70 CARSON RIVER ................................. 9 of 9 * 32 WALKER RIVER ................................. 7 of 7 * 64 KLAMATH ...................................... 13 of 18 * 182 COLORADO GUNNISON RIVER BASIN ......................... 10 of 16 208* 45 UPPER COLORADO RIVER BASIN ................... 24 of 31 229* 126 SOUTH PLATTE RIVER BASIN ..................... 16 of 22 146* 151 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 11 of 12 176* 153 YAMPA AND WHITE RIVER BASINS ................. 18 of 20 239* 118 ARKANSAS RIVER BASIN ......................... 6 of 9 224* 75 UPPER RIO GRANDE BASIN ....................... 10 of 16 27* 37 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 15 of 19 33* 14 IDAHO NORTHERN PANHANDLE REGION .................... 10 of 10 2067* 174 SPOKANE RIVER BASIN .......................... 9 of 10 2217* 174 CLEARWATER BASIN ............................. 15 of 16 3650* 176 SALMON BASIN ................................. 20 of 22 800* 131 WEISER BASIN ................................. 4 of 4 * 181 PAYETTE BASIN ................................ 10 of 11 * 148 BOISE BASIN .................................. 8 of 10 2025* 137 BIG WOOD BASIN ............................... 8 of 9 * 114 LITTLE WOOD BASIN ............................ 5 of 5 300* 98 BIG LOST BASIN ............................... 5 of 5 390* 78 LITTLE LOST, BIRCH BASINS .................... 3 of 4 600* 70 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 3 of 4 500* 64 HENRYS FORK, TETON BASINS .................... 7 of 8 314* 82 SNAKE BASIN ABOVE PALISADES .................. 17 of 18 275* 71 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 * 54 SNAKE BASIN ABOVE AMERICAN FALLS ............. 27 of 29 274* 70 RAFT BASIN ................................... 1 of 2 * 73 GOOSE CREEK BASIN ............................ 2 of 2 * 121 SALMON FALLS BASIN ........................... 5 of 5 1067* 133 BRUNEAU BASIN ................................ 5 of 5 867* 131 OWYHEE BASIN ................................. 8 of 8 * 139 BEAR RIVER BASIN ............................. 15 of 15 400* 41 MONTANA KOOTENAI RIVER BASIN ......................... 8 of 8 522* 129 FLATHEAD RIVER BASIN ......................... 11 of 16 330* 124 UPPER CLARK FORK RIVER BASIN ................. 11 of 15 314* 111 BITTERROOT RIVER BASIN ....................... 7 of 7 700* 110 LOWER CLARK FORK RIVER BASIN ................. 7 of 8 1038* 144 JEFFERSON RIVER BASIN ........................ 19 of 19 305* 76 MADISON RIVER BASIN .......................... 10 of 11 197* 70 GALLATIN RIVER BASIN ......................... 7 of 7 172* 81 MISSOURI HEADWATERS .......................... 30 of 31 249* 75 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 214* 112 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 165* 84 SUN, TETON AND MARIAS RIVER BASINS ........... 4 of 6 300* 110 MISSOURI MAINSTEM RIVER BASIN ................ 18 of 21 186* 108 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 300* 153 UPPER YELLOWSTONE RIVER BASIN ................ 23 of 24 203* 71 WIND RIVER BASIN (WYOMING) ................... 9 of 13 150* 83 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 238* 89 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 160* 74 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 36* 39 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 81* 72 LOWER YELLOWSTONE RIVER BASIN ................ 28 of 35 128* 68 NEVADA NORTHERN GREAT BASIN ......................... 6 of 9 * 115 SNAKE RIVER .................................. 7 of 10 1267* 128 OWYHEE RIVER ................................. 5 of 5 * 159 UPPER HUMBOLDT RIVER ......................... 8 of 9 * 96 LOWER HUMBOLDT RIVER ......................... 5 of 9 * 90 CLOVER VALLEY & FRANKLIN RIVER ............... 3 of 6 * 58 EASTERN NEVADA BASINS ........................ 4 of 4 * 28 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 * 46 UPPER RIO GRANDE BASIN ....................... 8 of 9 14* 27 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 7 of 11 * 79 JEMEZ RIVER BASIN ............................ 2 of 3 * 48 SAN FRANCISCO RIVER BASIN .................... 2 of 3 * 15 GILA RIVER BASIN ............................. 3 of 3 * 3 MIMBRES RIVER BASIN .......................... 2 of 2 * 21 PECOS RIVER BASIN ............................ 1 of 1 * 88 SAN JUAN RIVER HEADWATERS .................... 5 of 5 14* 7 ANIMAS RIVER BASIN ........................... 6 of 7 44* 8 CIMARRON RIVER BASIN ......................... 0 of 2 * 47 ZUNI/BLUEWATER RIVER BASIN ................... 0 of 1 * 0 RIO HONDO BASIN .............................. 0 of 1 * 79 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 139 MALHEUR ...................................... 3 of 3 * 309 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 13 of 17 4567* 226 UMATILLA, WALLA WALLA, WILLOW ................ 4 of 8 * 258 JOHN DAY ..................................... 11 of 13 * 257 UPPER DESCHUTES, CROOKED ..................... 8 of 14 * 251 HOOD, SANDY, LOWER DESCHUTES ................. 8 of 8 * 290 COAST RANGE .................................. 1 of 2 * * WILLAMETTE ................................... 14 of 23 * 271 ROGUE, UMPQUA ................................ 8 of 12 * 187 KLAMATH ...................................... 13 of 18 * 182 LAKE COUNTY, GOOSE LAKE ...................... 8 of 9 * 128 HARNEY ....................................... 8 of 9 * 243 UTAH RAFT RIVER ................................... 1 of 2 * 73 BEAR RIVER ................................... 18 of 24 556* 40 WEBER-OGDEN RIVERS ........................... 16 of 20 686* 27 PROVO R.-UTAH LAKE-JORDAN R. ................. 13 of 17 1033* 32 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 * 23 NORTHEASTERN UINTAHS ......................... 6 of 10 314* 62 DUCHESNE RIVER ............................... 11 of 13 206* 26 PRICE-SAN RAFAEL ............................. 6 of 11 * 34 DIRTY DEVIL .................................. 3 of 6 * 37 SOUTH EASTERN UTAH ........................... 3 of 6 * 20 UPPER SEVIER RIVER ........................... 11 of 17 188* 25 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 0* 13 ESCALANTE RIVER .............................. 3 of 4 * 15 SOUTHWESTERN UTAH ............................ 9 of 13 750* 5 WASHINGTON NORTHERN PANHANDLE ........................... 10 of 10 2067* 174 SPOKANE ...................................... 9 of 10 2217* 174 UPPER COLUMBIA ............................... 5 of 6 2500* 170 CENTRAL COLUMBIA ............................. 4 of 8 * 255 UPPER YAKIMA ................................. 4 of 5 * 229 LOWER YAKIMA ................................. 6 of 9 * * LOWER SNAKE .................................. 21 of 22 3373* 192 LOWER COLUMBIA ............................... 15 of 22 * 260 SOUTH PUGET SOUND ............................ 6 of 10 * * CENTRAL PUGET SOUND .......................... 9 of 9 * 201 NORTH PUGET SOUND ............................ 7 of 12 3033* 167 OLYMPIC ...................................... 2 of 4 * 165 WYOMING SNAKE RIVER .................................. 18 of 20 246* 75 MADISON-GALLATIN ............................. 4 of 5 111* 51 YELLOWSTONE .................................. 13 of 13 227* 70 WIND RIVER ................................... 8 of 12 148* 84 BIGHORN BASIN ................................ 10 of 11 119* 65 SHOSHONE RIVER ............................... 4 of 5 228* 91 POWDER RIVER ................................. 6 of 7 81* 72 TONGUE RIVER ................................. 6 of 7 36* 39 BELLE FOURCHE ................................ 1 of 1 * 50 CHEYENNE RIVER BASIN ......................... 2 of 2 * 59 UPPER N. PLATTE .............................. 15 of 18 125* 115 SWEETWATER ................................... 3 of 3 0* 34 LOWER N. PLATTE .............................. 4 of 4 73* 60 LARAMIE RIVER ................................ 6 of 6 229* 151 S. PLATTE .................................... 2 of 3 242* 165 LITTLE SNAKE RIVER ........................... 8 of 8 161* 117 UPPER GREEN RIVER ............................ 10 of 13 118* 51 LOWER GREEN RIVER ............................ 7 of 11 138* 48 UPPER BEAR RIVER ............................. 7 of 9 550* 38 ----------------------------------------------------------------------------- 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.