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: DECEMBER 6 , 2019 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 77 163 SUSITNA BASIN ................................ 3 of 5 239 232 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 37 106 SOUTHERN KENAI ............................... 2 of 6 * 117 COPPER BASIN ................................. 2 of 3 80 114 PRINCE WILLIAM SOUND ......................... 1 of 7 * * CHENA BASIN .................................. 1 of 7 * * UPPER TANANA ................................. 2 of 4 130 * KOYUKUK BASIN ................................ 2 of 6 * 174 CENTRAL YUKON BASIN .......................... 0 of 5 * 200 NORTON SOUND ................................. 0 of 4 * 134 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 177 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 3 * 119 ARIZONA VERDE RIVER BASIN ............................ 5 of 10 670* 179 SAN FRANCISCO PEAKS .......................... 0 of 1 * 184 CENTRAL MOGOLLON RIM ......................... 3 of 4 476* 167 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 356 145 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 292* 124 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 302 131 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 4 of 5 47 41 TRUCKEE RIVER ................................ 8 of 9 142 75 LAKE TAHOE ................................... 8 of 8 181 76 CARSON RIVER ................................. 9 of 9 246* 101 WALKER RIVER ................................. 7 of 7 124 73 KLAMATH ...................................... 16 of 18 62 35 COLORADO GUNNISON RIVER BASIN ......................... 13 of 16 106 73 UPPER COLORADO RIVER BASIN ................... 27 of 31 110 81 SOUTH PLATTE RIVER BASIN ..................... 17 of 22 133 106 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 12 of 12 113 92 YAMPA AND WHITE RIVER BASINS ................. 19 of 20 122 86 ARKANSAS RIVER BASIN ......................... 7 of 9 119 84 UPPER RIO GRANDE BASIN ....................... 11 of 16 117 63 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 17 of 19 115 71 IDAHO NORTHERN PANHANDLE REGION .................... 10 of 10 57 55 SPOKANE RIVER BASIN .......................... 10 of 10 32 53 CLEARWATER BASIN ............................. 15 of 16 45 59 SALMON BASIN ................................. 22 of 22 64 51 WEISER BASIN ................................. 4 of 4 76 47 PAYETTE BASIN ................................ 11 of 11 52 43 BOISE BASIN .................................. 9 of 10 49 39 BIG WOOD BASIN ............................... 8 of 9 52 42 LITTLE WOOD BASIN ............................ 5 of 5 54 46 BIG LOST BASIN ............................... 5 of 5 61 47 LITTLE LOST, BIRCH BASINS .................... 4 of 4 73 54 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 88 75 HENRYS FORK, TETON BASINS .................... 8 of 8 71 61 SNAKE BASIN ABOVE PALISADES .................. 18 of 18 85 70 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 86 65 SNAKE BASIN ABOVE AMERICAN FALLS ............. 29 of 29 83 67 RAFT BASIN ................................... 1 of 2 85 68 GOOSE CREEK BASIN ............................ 2 of 2 46 48 SALMON FALLS BASIN ........................... 5 of 6 53 44 BRUNEAU BASIN ................................ 5 of 6 62 47 OWYHEE BASIN ................................. 8 of 8 85 46 BEAR RIVER BASIN ............................. 15 of 15 108 77 MONTANA KOOTENAI RIVER BASIN ......................... 6 of 8 65 54 FLATHEAD RIVER BASIN ......................... 12 of 16 91 77 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 98 86 BITTERROOT RIVER BASIN ....................... 7 of 7 67 67 LOWER CLARK FORK RIVER BASIN ................. 7 of 8 45 61 JEFFERSON RIVER BASIN ........................ 19 of 19 95 79 MADISON RIVER BASIN .......................... 11 of 11 85 71 GALLATIN RIVER BASIN ......................... 7 of 7 103 97 MISSOURI HEADWATERS .......................... 31 of 31 94 79 HEADWATERS MISSOURI MAINSTEM ................. 4 of 5 120 97 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 130 98 SUN, TETON AND MARIAS RIVER BASINS ........... 5 of 6 168 99 MISSOURI MAINSTEM RIVER BASIN ................ 18 of 21 145 101 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 97 82 UPPER YELLOWSTONE RIVER BASIN ................ 23 of 24 109 92 WIND RIVER BASIN (WYOMING) ................... 11 of 13 114 78 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 101 87 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 127 102 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 129 95 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 165 127 LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35 123 94 NEVADA NORTHERN GREAT BASIN ......................... 7 of 9 67 46 SNAKE RIVER .................................. 7 of 11 57 47 OWYHEE RIVER ................................. 5 of 5 79 49 UPPER HUMBOLDT RIVER ......................... 9 of 9 76 54 LOWER HUMBOLDT RIVER ......................... 5 of 9 125 62 CLOVER VALLEY & FRANKLIN RIVER ............... 4 of 6 86 57 EASTERN NEVADA BASINS ........................ 4 of 4 146 79 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 121 68 UPPER RIO GRANDE BASIN ....................... 9 of 9 107 61 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 153 98 JEMEZ RIVER BASIN ............................ 3 of 3 131 66 SAN FRANCISCO RIVER BASIN .................... 3 of 3 447 123 GILA RIVER BASIN ............................. 3 of 3 289 131 MIMBRES RIVER BASIN .......................... 2 of 2 371 170 PECOS RIVER BASIN ............................ 1 of 1 145 108 SAN JUAN RIVER HEADWATERS .................... 5 of 5 106 65 ANIMAS RIVER BASIN ........................... 7 of 7 113 77 CIMARRON RIVER BASIN ......................... 2 of 2 144 95 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 317* 109 RIO HONDO BASIN .............................. 1 of 1 345* 183 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 85 46 MALHEUR ...................................... 3 of 3 96 56 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 15 of 17 53 61 UMATILLA, WALLA WALLA, WILLOW ................ 7 of 8 35 58 JOHN DAY ..................................... 13 of 13 60 52 UPPER DESCHUTES, CROOKED ..................... 14 of 14 38 39 HOOD, SANDY, LOWER DESCHUTES ................. 8 of 8 35 48 COAST RANGE .................................. 1 of 2 * 38 WILLAMETTE ................................... 19 of 23 33 38 ROGUE, UMPQUA ................................ 12 of 12 69 37 KLAMATH ...................................... 16 of 18 62 35 LAKE COUNTY, GOOSE LAKE ...................... 9 of 9 66 36 HARNEY ....................................... 9 of 9 73 57 UTAH RAFT RIVER ................................... 1 of 2 85 68 BEAR RIVER ................................... 18 of 24 113 76 WEBER-OGDEN RIVERS ........................... 17 of 20 118 73 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 118 75 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 154 89 NORTHEASTERN UINTAHS ......................... 6 of 10 164 111 DUCHESNE RIVER ............................... 12 of 13 150 93 PRICE-SAN RAFAEL ............................. 6 of 11 126 84 DIRTY DEVIL .................................. 3 of 6 193 111 SOUTH EASTERN UTAH ........................... 3 of 7 * * UPPER SEVIER RIVER ........................... 12 of 17 255 132 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 158 129 ESCALANTE RIVER .............................. 3 of 4 320 147 SOUTHWESTERN UTAH ............................ 10 of 13 455* 161 WASHINGTON NORTHERN PANHANDLE ........................... 10 of 10 57 55 SPOKANE ...................................... 10 of 10 32 53 UPPER COLUMBIA ............................... 5 of 6 55 54 CENTRAL COLUMBIA ............................. 7 of 8 29 57 UPPER YAKIMA ................................. 4 of 5 7 59 LOWER YAKIMA ................................. 5 of 9 40 51 LOWER SNAKE .................................. 21 of 22 47 60 LOWER COLUMBIA ............................... 18 of 22 28 47 SOUTH PUGET SOUND ............................ 7 of 10 27 60 CENTRAL PUGET SOUND .......................... 8 of 9 5 69 NORTH PUGET SOUND ............................ 6 of 12 23 59 OLYMPIC ...................................... 2 of 4 29 33 WYOMING SNAKE RIVER .................................. 20 of 20 85 67 MADISON-GALLATIN ............................. 5 of 5 81 59 YELLOWSTONE .................................. 14 of 14 106 85 WIND RIVER ................................... 10 of 12 113 80 BIGHORN BASIN ................................ 10 of 11 149 114 SHOSHONE RIVER ............................... 5 of 6 101 87 POWDER RIVER ................................. 6 of 7 165 127 TONGUE RIVER ................................. 6 of 7 129 95 BELLE FOURCHE ................................ 2 of 2 211 96 CHEYENNE RIVER BASIN ......................... 2 of 2 181 102 UPPER N. PLATTE .............................. 17 of 19 117 95 SWEETWATER ................................... 3 of 3 73 60 LOWER N. PLATTE .............................. 4 of 4 193 115 LARAMIE RIVER ................................ 7 of 7 151 111 S. PLATTE .................................... 2 of 3 142 119 LITTLE SNAKE RIVER ........................... 8 of 8 153 93 UPPER GREEN RIVER ............................ 13 of 14 91 71 LOWER GREEN RIVER ............................ 7 of 11 124 96 UPPER BEAR RIVER ............................. 8 of 10 103 74 ----------------------------------------------------------------------------- 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.