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: SEPTEMBER 24 , 2017 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 * 81 SUSITNA BASIN ................................ 3 of 5 * 82 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 * 92 SOUTHERN KENAI ............................... 3 of 6 * 90 COPPER BASIN ................................. 2 of 3 * 82 PRINCE WILLIAM SOUND ......................... 1 of 7 * 81 CHENA BASIN .................................. 6 of 7 * 95 UPPER TANANA ................................. 2 of 5 * * KOYUKUK BASIN ................................ 2 of 6 * 109 CENTRAL YUKON BASIN .......................... 0 of 5 * 89 NORTON SOUND ................................. 0 of 4 * 94 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 128 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 3 * 98 ARIZONA VERDE RIVER BASIN ............................ 5 of 10 * 115 SAN FRANCISCO PEAKS .......................... 1 of 1 * 126 CENTRAL MOGOLLON RIM ......................... 2 of 4 * 112 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 4 of 6 * 108 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 6 of 9 * 94 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 6 of 8 * 89 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 3 of 5 * 131 TRUCKEE RIVER ................................ 8 of 9 * 197 LAKE TAHOE ................................... 8 of 8 * 211 CARSON RIVER ................................. 8 of 9 * 197 WALKER RIVER ................................. 7 of 7 * 204 KLAMATH ...................................... 16 of 18 * 131 COLORADO GUNNISON RIVER BASIN ......................... 11 of 16 * 102 UPPER COLORADO RIVER BASIN ................... 24 of 31 * 101 SOUTH PLATTE RIVER BASIN ..................... 17 of 22 * 109 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 10 of 12 * 107 YAMPA AND WHITE RIVER BASINS ................. 17 of 20 * 97 ARKANSAS RIVER BASIN ......................... 7 of 9 * 111 UPPER RIO GRANDE BASIN ....................... 11 of 16 * 102 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 16 of 19 * 101 IDAHO NORTHERN PANHANDLE REGION .................... 10 of 10 * 124 SPOKANE RIVER BASIN .......................... 10 of 10 * 120 CLEARWATER BASIN ............................. 14 of 16 * 112 SALMON BASIN ................................. 21 of 22 * 131 WEISER BASIN ................................. 4 of 4 * 126 PAYETTE BASIN ................................ 11 of 11 * 139 BOISE BASIN .................................. 9 of 10 * 150 BIG WOOD BASIN ............................... 8 of 9 * 158 LITTLE WOOD BASIN ............................ 5 of 5 * 162 BIG LOST BASIN ............................... 5 of 5 * 160 LITTLE LOST, BIRCH BASINS .................... 4 of 4 * 137 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 * 126 HENRYS FORK, TETON BASINS .................... 8 of 8 * 140 SNAKE BASIN ABOVE PALISADES .................. 17 of 18 * 147 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 * 144 SNAKE BASIN ABOVE AMERICAN FALLS ............. 28 of 29 * 144 RAFT BASIN ................................... 1 of 2 * 148 GOOSE CREEK BASIN ............................ 2 of 2 * 130 SALMON FALLS BASIN ........................... 5 of 5 * 128 BRUNEAU BASIN ................................ 5 of 5 * 130 OWYHEE BASIN ................................. 8 of 8 * 130 BEAR RIVER BASIN ............................. 15 of 15 * 140 MONTANA KOOTENAI RIVER BASIN ......................... 8 of 8 * 116 FLATHEAD RIVER BASIN ......................... 12 of 16 * 112 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 * 104 BITTERROOT RIVER BASIN ....................... 7 of 7 * 108 LOWER CLARK FORK RIVER BASIN ................. 8 of 8 * 116 JEFFERSON RIVER BASIN ........................ 19 of 19 * 108 MADISON RIVER BASIN .......................... 11 of 11 * 121 GALLATIN RIVER BASIN ......................... 7 of 7 * 114 MISSOURI HEADWATERS .......................... 31 of 31 * 113 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 * 97 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 8 of 10 * 90 SUN, TETON AND MARIAS RIVER BASINS ........... 4 of 6 * 101 MISSOURI MAINSTEM RIVER BASIN ................ 17 of 21 * 93 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 * 103 UPPER YELLOWSTONE RIVER BASIN ................ 22 of 24 * 127 WIND RIVER BASIN (WYOMING) ................... 11 of 13 * 152 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 * 155 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 * 130 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 * 114 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 * 109 LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35 * 133 NEVADA NORTHERN GREAT BASIN ......................... 6 of 9 * 135 SNAKE RIVER .................................. 7 of 10 * 130 OWYHEE RIVER ................................. 5 of 5 * 133 UPPER HUMBOLDT RIVER ......................... 9 of 9 * 138 LOWER HUMBOLDT RIVER ......................... 5 of 9 * 135 CLOVER VALLEY & FRANKLIN RIVER ............... 4 of 6 * 138 EASTERN NEVADA BASINS ........................ 4 of 4 * 113 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 * 121 UPPER RIO GRANDE BASIN ....................... 9 of 9 * 98 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 * 99 JEMEZ RIVER BASIN ............................ 2 of 3 * 76 SAN FRANCISCO RIVER BASIN .................... 2 of 3 * 86 GILA RIVER BASIN ............................. 3 of 3 * 94 MIMBRES RIVER BASIN .......................... 2 of 2 * 84 PECOS RIVER BASIN ............................ 1 of 1 * 83 SAN JUAN RIVER HEADWATERS .................... 5 of 5 * 92 ANIMAS RIVER BASIN ........................... 7 of 7 * 102 CIMARRON RIVER BASIN ......................... 2 of 2 * 102 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 * 110 RIO HONDO BASIN .............................. 0 of 1 * 80 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 130 MALHEUR ...................................... 3 of 3 * 119 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 15 of 17 * 123 UMATILLA, WALLA WALLA, WILLOW ................ 7 of 8 * 119 JOHN DAY ..................................... 12 of 13 * 115 UPPER DESCHUTES, CROOKED ..................... 13 of 14 * 125 HOOD, SANDY, LOWER DESCHUTES ................. 7 of 8 * 120 COAST RANGE .................................. 1 of 2 * 136 WILLAMETTE ................................... 19 of 23 * 127 ROGUE, UMPQUA ................................ 11 of 12 * 134 KLAMATH ...................................... 16 of 18 * 131 LAKE COUNTY, GOOSE LAKE ...................... 8 of 9 * 136 HARNEY ....................................... 8 of 9 * 113 UTAH RAFT RIVER ................................... 1 of 2 * 148 BEAR RIVER ................................... 18 of 24 * 143 WEBER-OGDEN RIVERS ........................... 16 of 20 * 126 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 * 118 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 * 113 NORTHEASTERN UINTAHS ......................... 6 of 10 * 114 DUCHESNE RIVER ............................... 12 of 13 * 121 PRICE-SAN RAFAEL ............................. 6 of 11 * 120 DIRTY DEVIL .................................. 3 of 6 * 116 SOUTH EASTERN UTAH ........................... 3 of 6 * 95 UPPER SEVIER RIVER ........................... 12 of 17 * 108 SAN PITCH RIVER .............................. 4 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 * 117 ESCALANTE RIVER .............................. 3 of 4 * 101 SOUTHWESTERN UTAH ............................ 10 of 13 * 113 WASHINGTON NORTHERN PANHANDLE ........................... 10 of 10 * 124 SPOKANE ...................................... 10 of 10 * 120 UPPER COLUMBIA ............................... 4 of 6 * 119 CENTRAL COLUMBIA ............................. 6 of 8 * 114 UPPER YAKIMA ................................. 3 of 5 * 101 LOWER YAKIMA ................................. 5 of 9 * 125 LOWER SNAKE .................................. 20 of 22 * 115 LOWER COLUMBIA ............................... 15 of 22 * 130 SOUTH PUGET SOUND ............................ 6 of 10 * 103 CENTRAL PUGET SOUND .......................... 8 of 9 * 105 NORTH PUGET SOUND ............................ 7 of 12 * 112 OLYMPIC ...................................... 3 of 4 * 131 WYOMING SNAKE RIVER .................................. 19 of 20 * 145 MADISON-GALLATIN ............................. 5 of 5 * 131 YELLOWSTONE .................................. 12 of 13 * 136 WIND RIVER ................................... 10 of 12 * 151 BIGHORN BASIN ................................ 10 of 11 * 112 SHOSHONE RIVER ............................... 4 of 5 * 156 POWDER RIVER ................................. 6 of 7 * 109 TONGUE RIVER ................................. 6 of 7 * 114 BELLE FOURCHE ................................ 1 of 1 * 99 CHEYENNE RIVER BASIN ......................... 2 of 2 * 92 UPPER N. PLATTE .............................. 12 of 18 * 104 SWEETWATER ................................... 3 of 3 * 150 LOWER N. PLATTE .............................. 4 of 4 * 98 LARAMIE RIVER ................................ 5 of 6 * 99 S. PLATTE .................................... 1 of 3 * 99 LITTLE SNAKE RIVER ........................... 7 of 8 * 101 UPPER GREEN RIVER ............................ 12 of 13 * 150 LOWER GREEN RIVER ............................ 6 of 11 * 131 UPPER BEAR RIVER ............................. 7 of 9 * 134 ----------------------------------------------------------------------------- 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.