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: DECEMBER 9 , 2019 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 81 167 SUSITNA BASIN ................................ 3 of 5 227 230 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 39 111 SOUTHERN KENAI ............................... 3 of 6 125* 142 COPPER BASIN ................................. 2 of 3 81 111 PRINCE WILLIAM SOUND ......................... 1 of 7 * * CHENA BASIN .................................. 1 of 7 * * UPPER TANANA ................................. 2 of 4 134 * KOYUKUK BASIN ................................ 2 of 6 * 179 CENTRAL YUKON BASIN .......................... 0 of 5 * 198 NORTON SOUND ................................. 0 of 4 * 142 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 176 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 3 * 115 ARIZONA VERDE RIVER BASIN ............................ 5 of 10 353* 175 SAN FRANCISCO PEAKS .......................... 0 of 1 * 180 CENTRAL MOGOLLON RIM ......................... 3 of 4 270 168 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 256 150 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 207 130 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 173 131 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 4 of 5 72 49 TRUCKEE RIVER ................................ 8 of 9 174 96 LAKE TAHOE ................................... 8 of 8 194 93 CARSON RIVER ................................. 9 of 9 262 114 WALKER RIVER ................................. 7 of 7 146 89 KLAMATH ...................................... 16 of 18 62 39 COLORADO GUNNISON RIVER BASIN ......................... 13 of 16 116 78 UPPER COLORADO RIVER BASIN ................... 27 of 31 114 83 SOUTH PLATTE RIVER BASIN ..................... 17 of 22 130 105 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 12 of 12 116 93 YAMPA AND WHITE RIVER BASINS ................. 19 of 20 122 86 ARKANSAS RIVER BASIN ......................... 7 of 9 123 84 UPPER RIO GRANDE BASIN ....................... 11 of 16 126 68 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 17 of 19 131 78 IDAHO NORTHERN PANHANDLE REGION .................... 10 of 10 60 58 SPOKANE RIVER BASIN .......................... 10 of 10 32 55 CLEARWATER BASIN ............................. 15 of 16 47 60 SALMON BASIN ................................. 22 of 22 74 57 WEISER BASIN ................................. 4 of 4 85 55 PAYETTE BASIN ................................ 11 of 11 68 51 BOISE BASIN .................................. 9 of 10 65 48 BIG WOOD BASIN ............................... 8 of 9 70 53 LITTLE WOOD BASIN ............................ 5 of 5 72 57 BIG LOST BASIN ............................... 5 of 5 76 59 LITTLE LOST, BIRCH BASINS .................... 4 of 4 81 57 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 91 77 HENRYS FORK, TETON BASINS .................... 8 of 8 84 70 SNAKE BASIN ABOVE PALISADES .................. 18 of 18 94 76 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 92 67 SNAKE BASIN ABOVE AMERICAN FALLS ............. 29 of 29 93 73 RAFT BASIN ................................... 1 of 2 87 69 GOOSE CREEK BASIN ............................ 2 of 2 52 49 SALMON FALLS BASIN ........................... 5 of 6 60 47 BRUNEAU BASIN ................................ 5 of 6 70 51 OWYHEE BASIN ................................. 8 of 8 98 53 BEAR RIVER BASIN ............................. 15 of 15 113 80 MONTANA KOOTENAI RIVER BASIN ......................... 7 of 8 65 59 FLATHEAD RIVER BASIN ......................... 11 of 16 99 84 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 100 84 BITTERROOT RIVER BASIN ....................... 7 of 7 69 65 LOWER CLARK FORK RIVER BASIN ................. 8 of 8 49 62 JEFFERSON RIVER BASIN ........................ 19 of 19 97 79 MADISON RIVER BASIN .......................... 11 of 11 90 74 GALLATIN RIVER BASIN ......................... 7 of 7 108 99 MISSOURI HEADWATERS .......................... 31 of 31 98 81 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 115 105 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 126 98 SUN, TETON AND MARIAS RIVER BASINS ........... 5 of 6 170 102 MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21 141 104 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 107 89 UPPER YELLOWSTONE RIVER BASIN ................ 23 of 24 116 97 WIND RIVER BASIN (WYOMING) ................... 11 of 13 113 76 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 109 90 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 131 103 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 127 94 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 166 126 LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35 124 94 NEVADA NORTHERN GREAT BASIN ......................... 7 of 9 88 54 SNAKE RIVER .................................. 7 of 11 64 50 OWYHEE RIVER ................................. 5 of 5 95 56 UPPER HUMBOLDT RIVER ......................... 9 of 9 86 59 LOWER HUMBOLDT RIVER ......................... 5 of 9 135 67 CLOVER VALLEY & FRANKLIN RIVER ............... 4 of 6 91 61 EASTERN NEVADA BASINS ........................ 4 of 4 149 82 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 139 78 UPPER RIO GRANDE BASIN ....................... 9 of 9 116 66 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 170 109 JEMEZ RIVER BASIN ............................ 3 of 3 186 89 SAN FRANCISCO RIVER BASIN .................... 3 of 3 246 123 GILA RIVER BASIN ............................. 3 of 3 156 127 MIMBRES RIVER BASIN .......................... 2 of 2 127 162 PECOS RIVER BASIN ............................ 1 of 1 147 117 SAN JUAN RIVER HEADWATERS .................... 5 of 5 112 66 ANIMAS RIVER BASIN ........................... 7 of 7 132 87 CIMARRON RIVER BASIN ......................... 2 of 2 158 102 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 312 122 RIO HONDO BASIN .............................. 1 of 1 247 175 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 98 53 MALHEUR ...................................... 3 of 3 97 58 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 15 of 17 64 65 UMATILLA, WALLA WALLA, WILLOW ................ 7 of 8 40 60 JOHN DAY ..................................... 13 of 13 70 57 UPPER DESCHUTES, CROOKED ..................... 13 of 14 41 39 HOOD, SANDY, LOWER DESCHUTES ................. 8 of 8 27 49 COAST RANGE .................................. 1 of 2 * 40 WILLAMETTE ................................... 18 of 23 27 38 ROGUE, UMPQUA ................................ 12 of 12 62 41 KLAMATH ...................................... 16 of 18 62 39 LAKE COUNTY, GOOSE LAKE ...................... 9 of 9 84 43 HARNEY ....................................... 9 of 9 81 60 UTAH RAFT RIVER ................................... 1 of 2 87 69 BEAR RIVER ................................... 18 of 24 118 79 WEBER-OGDEN RIVERS ........................... 17 of 20 121 75 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 123 78 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 164 92 NORTHEASTERN UINTAHS ......................... 6 of 10 161 112 DUCHESNE RIVER ............................... 12 of 13 151 95 PRICE-SAN RAFAEL ............................. 6 of 11 140 88 DIRTY DEVIL .................................. 3 of 6 198 114 SOUTH EASTERN UTAH ........................... 3 of 7 * * UPPER SEVIER RIVER ........................... 12 of 17 250 133 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 163 127 ESCALANTE RIVER .............................. 3 of 4 294 144 SOUTHWESTERN UTAH ............................ 10 of 13 414* 162 WASHINGTON NORTHERN PANHANDLE ........................... 10 of 10 60 58 SPOKANE ...................................... 10 of 10 32 55 UPPER COLUMBIA ............................... 5 of 6 55 57 CENTRAL COLUMBIA ............................. 7 of 8 29 56 UPPER YAKIMA ................................. 1 of 5 * 58 LOWER YAKIMA ................................. 6 of 9 38 50 LOWER SNAKE .................................. 21 of 22 51 62 LOWER COLUMBIA ............................... 17 of 22 23 48 SOUTH PUGET SOUND ............................ 6 of 10 32 60 CENTRAL PUGET SOUND .......................... 3 of 9 * 69 NORTH PUGET SOUND ............................ 4 of 12 * 58 OLYMPIC ...................................... 2 of 4 18 35 WYOMING SNAKE RIVER .................................. 20 of 20 94 73 MADISON-GALLATIN ............................. 5 of 5 89 65 YELLOWSTONE .................................. 14 of 14 115 90 WIND RIVER ................................... 10 of 12 112 78 BIGHORN BASIN ................................ 10 of 11 151 113 SHOSHONE RIVER ............................... 5 of 6 109 90 POWDER RIVER ................................. 6 of 7 166 126 TONGUE RIVER ................................. 6 of 7 127 94 BELLE FOURCHE ................................ 2 of 2 193 108 CHEYENNE RIVER BASIN ......................... 2 of 2 166 97 UPPER N. PLATTE .............................. 17 of 19 119 96 SWEETWATER ................................... 3 of 3 75 55 LOWER N. PLATTE .............................. 4 of 4 186 111 LARAMIE RIVER ................................ 7 of 7 144 108 S. PLATTE .................................... 2 of 3 134 118 LITTLE SNAKE RIVER ........................... 8 of 8 147 91 UPPER GREEN RIVER ............................ 13 of 14 98 75 LOWER GREEN RIVER ............................ 7 of 11 126 97 UPPER BEAR RIVER ............................. 8 of 10 105 77 ----------------------------------------------------------------------------- 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.