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: JULY 23 , 2017 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 * 70 SUSITNA BASIN ................................ 3 of 5 * 66 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 * 81 SOUTHERN KENAI ............................... 3 of 6 * 77 COPPER BASIN ................................. 2 of 3 * 74 PRINCE WILLIAM SOUND ......................... 1 of 7 * * CHENA BASIN .................................. 6 of 7 * 98 UPPER TANANA ................................. 2 of 5 * * KOYUKUK BASIN ................................ 2 of 6 * 62 CENTRAL YUKON BASIN .......................... 0 of 5 * 83 NORTON SOUND ................................. 0 of 4 * 72 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * * NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 3 * 93 ARIZONA VERDE RIVER BASIN ............................ 4 of 10 * 125 SAN FRANCISCO PEAKS .......................... 1 of 1 * 133 CENTRAL MOGOLLON RIM ......................... 3 of 4 * 127 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 * 123 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 * 109 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 * 100 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 3 of 5 * 134 TRUCKEE RIVER ................................ 8 of 9 * 197 LAKE TAHOE ................................... 8 of 8 * 208 CARSON RIVER ................................. 6 of 9 * * WALKER RIVER ................................. 7 of 7 * 200 KLAMATH ...................................... 10 of 18 * * COLORADO GUNNISON RIVER BASIN ......................... 9 of 16 * 105 UPPER COLORADO RIVER BASIN ................... 23 of 31 * 105 SOUTH PLATTE RIVER BASIN ..................... 16 of 22 * 112 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 11 of 12 * 109 YAMPA AND WHITE RIVER BASINS ................. 17 of 20 * 99 ARKANSAS RIVER BASIN ......................... 5 of 9 * 115 UPPER RIO GRANDE BASIN ....................... 9 of 16 * 106 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 14 of 19 * 106 IDAHO NORTHERN PANHANDLE REGION .................... 6 of 10 * 128 SPOKANE RIVER BASIN .......................... 9 of 10 * 122 CLEARWATER BASIN ............................. 14 of 16 * 114 SALMON BASIN ................................. 21 of 22 * 130 WEISER BASIN ................................. 3 of 4 * 122 PAYETTE BASIN ................................ 10 of 11 * 137 BOISE BASIN .................................. 8 of 10 * 149 BIG WOOD BASIN ............................... 8 of 9 * 156 LITTLE WOOD BASIN ............................ 5 of 5 * 156 BIG LOST BASIN ............................... 5 of 5 * 154 LITTLE LOST, BIRCH BASINS .................... 4 of 4 * 129 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 * 121 HENRYS FORK, TETON BASINS .................... 8 of 8 * 137 SNAKE BASIN ABOVE PALISADES .................. 17 of 18 * 146 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 * 142 SNAKE BASIN ABOVE AMERICAN FALLS ............. 28 of 29 * 142 RAFT BASIN ................................... 1 of 2 * 144 GOOSE CREEK BASIN ............................ 2 of 2 * 126 SALMON FALLS BASIN ........................... 5 of 5 * 124 BRUNEAU BASIN ................................ 5 of 5 * 127 OWYHEE BASIN ................................. 8 of 8 * 129 BEAR RIVER BASIN ............................. 15 of 15 * 140 MONTANA KOOTENAI RIVER BASIN ......................... 7 of 8 * 120 FLATHEAD RIVER BASIN ......................... 13 of 16 * 117 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 * 108 BITTERROOT RIVER BASIN ....................... 7 of 7 * 111 LOWER CLARK FORK RIVER BASIN ................. 8 of 8 * 120 JEFFERSON RIVER BASIN ........................ 17 of 19 * 110 MADISON RIVER BASIN .......................... 11 of 11 * 118 GALLATIN RIVER BASIN ......................... 7 of 7 * 111 MISSOURI HEADWATERS .......................... 29 of 31 * 112 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 * 98 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 * 93 SUN, TETON AND MARIAS RIVER BASINS ........... 5 of 6 * 109 MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21 * 99 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 * 113 UPPER YELLOWSTONE RIVER BASIN ................ 21 of 24 * 121 WIND RIVER BASIN (WYOMING) ................... 11 of 13 * 154 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 * 149 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 * 126 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 * 113 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 * 104 LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35 * 132 NEVADA NORTHERN GREAT BASIN ......................... 6 of 9 * 139 SNAKE RIVER .................................. 7 of 10 * 126 OWYHEE RIVER ................................. 5 of 5 * 130 UPPER HUMBOLDT RIVER ......................... 9 of 9 * 136 LOWER HUMBOLDT RIVER ......................... 5 of 9 * 133 CLOVER VALLEY & FRANKLIN RIVER ............... 4 of 6 * 136 EASTERN NEVADA BASINS ........................ 4 of 4 * 103 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 * 125 UPPER RIO GRANDE BASIN ....................... 7 of 9 * 101 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 * 103 JEMEZ RIVER BASIN ............................ 2 of 3 * 90 SAN FRANCISCO RIVER BASIN .................... 3 of 3 * 92 GILA RIVER BASIN ............................. 3 of 3 * 103 MIMBRES RIVER BASIN .......................... 2 of 2 * 107 PECOS RIVER BASIN ............................ 1 of 1 * 85 SAN JUAN RIVER HEADWATERS .................... 3 of 5 * 93 ANIMAS RIVER BASIN ........................... 7 of 7 * 107 CIMARRON RIVER BASIN ......................... 2 of 2 * 102 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 * 130 RIO HONDO BASIN .............................. 0 of 1 * 88 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 129 MALHEUR ...................................... 3 of 3 * 120 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 14 of 17 * 122 UMATILLA, WALLA WALLA, WILLOW ................ 5 of 8 * 119 JOHN DAY ..................................... 12 of 13 * 118 UPPER DESCHUTES, CROOKED ..................... 12 of 14 * 124 HOOD, SANDY, LOWER DESCHUTES ................. 8 of 8 * 117 COAST RANGE .................................. 1 of 2 * 137 WILLAMETTE ................................... 15 of 23 * 124 ROGUE, UMPQUA ................................ 11 of 12 * 133 KLAMATH ...................................... 10 of 18 * * LAKE COUNTY, GOOSE LAKE ...................... 3 of 9 * * HARNEY ....................................... 8 of 9 * 114 UTAH RAFT RIVER ................................... 1 of 2 * 144 BEAR RIVER ................................... 18 of 24 * 143 WEBER-OGDEN RIVERS ........................... 17 of 20 * 126 PROVO R.-UTAH LAKE-JORDAN R. ................. 13 of 17 * 117 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 * 113 NORTHEASTERN UINTAHS ......................... 5 of 10 * 108 DUCHESNE RIVER ............................... 12 of 13 * 127 PRICE-SAN RAFAEL ............................. 6 of 11 * 120 DIRTY DEVIL .................................. 2 of 6 * 112 SOUTH EASTERN UTAH ........................... 3 of 6 * 94 UPPER SEVIER RIVER ........................... 11 of 17 * 101 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 * * ESCALANTE RIVER .............................. 2 of 4 * 95 SOUTHWESTERN UTAH ............................ 10 of 13 * 105 WASHINGTON NORTHERN PANHANDLE ........................... 6 of 10 * 128 SPOKANE ...................................... 9 of 10 * 122 UPPER COLUMBIA ............................... 5 of 6 * 126 CENTRAL COLUMBIA ............................. 7 of 8 * 114 UPPER YAKIMA ................................. 3 of 5 * 105 LOWER YAKIMA ................................. 6 of 9 * 126 LOWER SNAKE .................................. 19 of 22 * 117 LOWER COLUMBIA ............................... 15 of 22 * 130 SOUTH PUGET SOUND ............................ 6 of 10 * 113 CENTRAL PUGET SOUND .......................... 6 of 9 * * NORTH PUGET SOUND ............................ 8 of 12 * * OLYMPIC ...................................... 2 of 4 * 135 WYOMING SNAKE RIVER .................................. 19 of 20 * 144 MADISON-GALLATIN ............................. 5 of 5 * 125 YELLOWSTONE .................................. 11 of 13 * 129 WIND RIVER ................................... 10 of 12 * 153 BIGHORN BASIN ................................ 10 of 11 * 110 SHOSHONE RIVER ............................... 4 of 5 * 152 POWDER RIVER ................................. 6 of 7 * 104 TONGUE RIVER ................................. 6 of 7 * 113 BELLE FOURCHE ................................ 1 of 1 * 91 CHEYENNE RIVER BASIN ......................... 2 of 2 * 86 UPPER N. PLATTE .............................. 11 of 18 * 106 SWEETWATER ................................... 3 of 3 * 157 LOWER N. PLATTE .............................. 4 of 4 * 96 LARAMIE RIVER ................................ 4 of 6 * 101 S. PLATTE .................................... 1 of 3 * 103 LITTLE SNAKE RIVER ........................... 6 of 8 * 101 UPPER GREEN RIVER ............................ 12 of 13 * 153 LOWER GREEN RIVER ............................ 6 of 11 * 133 UPPER BEAR RIVER ............................. 7 of 9 * 132 ----------------------------------------------------------------------------- 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.