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 WEDNESDAY: JULY 19 , 2017 ----------------------------------------------------------------------------- STATE PERCENT OF Normal RIVER BASIN Number Snow Water Accum of Sites Equivalent Precip ----------------------------------------------------------------------------- ALASKA ANCHORAGE/SHIP CREEK BASIN ................... 4 of 4 * 71 SUSITNA BASIN ................................ 3 of 5 * 68 NORTHERN KENAI MOUNTAINS ..................... 7 of 7 * 82 SOUTHERN KENAI ............................... 3 of 6 * 78 COPPER BASIN ................................. 2 of 3 * 76 PRINCE WILLIAM SOUND ......................... 1 of 7 * 78 CHENA BASIN .................................. 5 of 7 * 96 UPPER TANANA ................................. 2 of 5 * * KOYUKUK BASIN ................................ 2 of 6 * 64 CENTRAL YUKON BASIN .......................... 0 of 5 * 83 NORTON SOUND ................................. 0 of 4 * 73 KUPARUK-SAGAVANIRKTOK RIVER BASIN ............ 0 of 3 * 70 NORTHWEST ARCTIC RIVER BASIN ................. 0 of 1 * * SOUTHEAST ALASKA BASIN ....................... 1 of 3 * 94 ARIZONA VERDE RIVER BASIN ............................ 4 of 10 * 123 SAN FRANCISCO PEAKS .......................... 1 of 1 * 133 CENTRAL MOGOLLON RIM ......................... 3 of 4 * 125 LITTLE COLORADO - SOUTHERN HEADWATERS ........ 5 of 6 * 122 UPPER SALT RIVER BASIN / WHITE MOUNTAINS ..... 7 of 9 * 108 SAN FRANCISCO / UPPER GILA RIVER BASIN ....... 7 of 8 * 99 CHUSKA MOUNTAINS ............................. 0 of 2 * * CALIFORNIA NORTHERN GREAT BASIN ......................... 2 of 5 * 130 TRUCKEE RIVER ................................ 8 of 9 * 197 LAKE TAHOE ................................... 8 of 8 * 208 CARSON RIVER ................................. 7 of 9 * 190 WALKER RIVER ................................. 7 of 7 * 201 KLAMATH ...................................... 13 of 18 * 129 COLORADO GUNNISON RIVER BASIN ......................... 9 of 16 * 101 UPPER COLORADO RIVER BASIN ................... 20 of 31 * 105 SOUTH PLATTE RIVER BASIN ..................... 13 of 22 * 110 LARAMIE AND NORTH PLATTE RIVER BASINS ........ 9 of 12 * 108 YAMPA AND WHITE RIVER BASINS ................. 15 of 20 * 98 ARKANSAS RIVER BASIN ......................... 5 of 9 * 113 UPPER RIO GRANDE BASIN ....................... 10 of 16 * 105 SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASIN .................. 13 of 19 * 105 IDAHO NORTHERN PANHANDLE REGION .................... 9 of 10 * 129 SPOKANE RIVER BASIN .......................... 10 of 10 * 122 CLEARWATER BASIN ............................. 15 of 16 * 114 SALMON BASIN ................................. 22 of 22 * 131 WEISER BASIN ................................. 4 of 4 * 128 PAYETTE BASIN ................................ 11 of 11 * 139 BOISE BASIN .................................. 9 of 10 * 150 BIG WOOD BASIN ............................... 8 of 9 * 157 LITTLE WOOD BASIN ............................ 5 of 5 * 157 BIG LOST BASIN ............................... 5 of 5 * 156 LITTLE LOST, BIRCH BASINS .................... 4 of 4 * 130 MEDICINE LODGE, BEAVER, CAMAS BASINS ......... 4 of 4 * 122 HENRYS FORK, TETON BASINS .................... 8 of 8 * 138 SNAKE BASIN ABOVE PALISADES .................. 17 of 18 * 146 WILLOW, BLACKFOOT, PORTNEUF BASINS ........... 6 of 6 * 143 SNAKE BASIN ABOVE AMERICAN FALLS ............. 28 of 29 * 143 RAFT BASIN ................................... 1 of 2 * 145 GOOSE CREEK BASIN ............................ 2 of 2 * 126 SALMON FALLS BASIN ........................... 5 of 5 * 125 BRUNEAU BASIN ................................ 5 of 5 * 128 OWYHEE BASIN ................................. 8 of 8 * 129 BEAR RIVER BASIN ............................. 15 of 15 * 141 MONTANA KOOTENAI RIVER BASIN ......................... 8 of 8 * 121 FLATHEAD RIVER BASIN ......................... 13 of 16 * 118 UPPER CLARK FORK RIVER BASIN ................. 13 of 15 * 109 BITTERROOT RIVER BASIN ....................... 7 of 7 * 112 LOWER CLARK FORK RIVER BASIN ................. 8 of 8 * 120 JEFFERSON RIVER BASIN ........................ 19 of 19 * 110 MADISON RIVER BASIN .......................... 11 of 11 * 118 GALLATIN RIVER BASIN ......................... 7 of 7 * 111 MISSOURI HEADWATERS .......................... 31 of 31 * 113 HEADWATERS MISSOURI MAINSTEM ................. 5 of 5 * 99 SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS .. 9 of 10 * 93 SUN, TETON AND MARIAS RIVER BASINS ........... 5 of 6 * 110 MISSOURI MAINSTEM RIVER BASIN ................ 19 of 21 * 100 ST. MARY AND MILK RIVER BASINS ............... 3 of 3 * 114 UPPER YELLOWSTONE RIVER BASIN ................ 22 of 24 * 122 WIND RIVER BASIN (WYOMING) ................... 11 of 13 * 155 SHOSHONE RIVER BASIN (WYOMING) ............... 5 of 6 * 150 BIGHORN RIVER BASIN (WYOMING) ................ 15 of 16 * 128 TONGUE RIVER BASIN (WYOMING) ................. 6 of 7 * 115 POWDER RIVER BASIN (WYOMING) ................. 6 of 7 * 111 LOWER YELLOWSTONE RIVER BASIN ................ 30 of 35 * 133 NEVADA NORTHERN GREAT BASIN ......................... 5 of 9 * 136 SNAKE RIVER .................................. 7 of 10 * 127 OWYHEE RIVER ................................. 5 of 5 * 131 UPPER HUMBOLDT RIVER ......................... 9 of 9 * 137 LOWER HUMBOLDT RIVER ......................... 5 of 9 * 134 CLOVER VALLEY & FRANKLIN RIVER ............... 4 of 6 * 136 EASTERN NEVADA BASINS ........................ 4 of 4 * 104 NEW MEXICO RIO CHAMA RIVER BASIN ........................ 4 of 4 * 125 UPPER RIO GRANDE BASIN ....................... 8 of 9 * 100 SANGRE DE CRISTO MOUNTAIN RANGE BASINS ....... 9 of 11 * 105 JEMEZ RIVER BASIN ............................ 3 of 3 * 91 SAN FRANCISCO RIVER BASIN .................... 3 of 3 * 92 GILA RIVER BASIN ............................. 3 of 3 * 101 MIMBRES RIVER BASIN .......................... 2 of 2 * 104 PECOS RIVER BASIN ............................ 1 of 1 * 87 SAN JUAN RIVER HEADWATERS .................... 4 of 5 * 92 ANIMAS RIVER BASIN ........................... 5 of 7 * 106 CIMARRON RIVER BASIN ......................... 2 of 2 * 104 ZUNI/BLUEWATER RIVER BASIN ................... 1 of 1 * 128 RIO HONDO BASIN .............................. 0 of 1 * 86 CHUSKA MOUNTAINS ............................. 0 of 1 * * OREGON OWYHEE ....................................... 8 of 8 * 129 MALHEUR ...................................... 3 of 3 * 120 GRANDE RONDE, POWDER, BURNT, IMNAHA .......... 14 of 17 * 123 UMATILLA, WALLA WALLA, WILLOW ................ 5 of 8 * 119 JOHN DAY ..................................... 12 of 13 * 118 UPPER DESCHUTES, CROOKED ..................... 10 of 14 * 126 HOOD, SANDY, LOWER DESCHUTES ................. 7 of 8 * 117 COAST RANGE .................................. 0 of 2 * 140 WILLAMETTE ................................... 11 of 23 * 125 ROGUE, UMPQUA ................................ 10 of 12 * 133 KLAMATH ...................................... 13 of 18 * 129 LAKE COUNTY, GOOSE LAKE ...................... 4 of 9 * 134 HARNEY ....................................... 8 of 9 * 115 UTAH RAFT RIVER ................................... 1 of 2 * 145 BEAR RIVER ................................... 18 of 24 * 144 WEBER-OGDEN RIVERS ........................... 17 of 20 * 127 PROVO R.-UTAH LAKE-JORDAN R. ................. 15 of 17 * 118 TOOELE VALLEY-VERNON CREEK ................... 3 of 4 * 113 NORTHEASTERN UINTAHS ......................... 6 of 10 * 106 DUCHESNE RIVER ............................... 12 of 13 * 126 PRICE-SAN RAFAEL ............................. 6 of 11 * 118 DIRTY DEVIL .................................. 3 of 6 * 112 SOUTH EASTERN UTAH ........................... 3 of 6 * 92 UPPER SEVIER RIVER ........................... 12 of 17 * 102 SAN PITCH RIVER .............................. 5 of 11 * * LOWER SEVIER RIVER ........................... 1 of 3 * * BEAVER RIVER ................................. 2 of 2 * 107 ESCALANTE RIVER .............................. 3 of 4 * 93 SOUTHWESTERN UTAH ............................ 10 of 13 * 107 WASHINGTON NORTHERN PANHANDLE ........................... 9 of 10 * 129 SPOKANE ...................................... 10 of 10 * 122 UPPER COLUMBIA ............................... 5 of 6 * 126 CENTRAL COLUMBIA ............................. 7 of 8 * 115 UPPER YAKIMA ................................. 4 of 5 * 105 LOWER YAKIMA ................................. 6 of 9 * 127 LOWER SNAKE .................................. 20 of 22 * 117 LOWER COLUMBIA ............................... 15 of 22 * 130 SOUTH PUGET SOUND ............................ 6 of 10 * 114 CENTRAL PUGET SOUND .......................... 7 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 * 126 YELLOWSTONE .................................. 12 of 13 * 129 WIND RIVER ................................... 10 of 12 * 154 BIGHORN BASIN ................................ 10 of 11 * 111 SHOSHONE RIVER ............................... 4 of 5 * 153 POWDER RIVER ................................. 6 of 7 * 111 TONGUE RIVER ................................. 6 of 7 * 115 BELLE FOURCHE ................................ 1 of 1 * 86 CHEYENNE RIVER BASIN ......................... 2 of 2 * 84 UPPER N. PLATTE .............................. 12 of 18 * 105 SWEETWATER ................................... 3 of 3 * 157 LOWER N. PLATTE .............................. 4 of 4 * 97 LARAMIE RIVER ................................ 4 of 6 * 100 S. PLATTE .................................... 1 of 3 * 101 LITTLE SNAKE RIVER ........................... 5 of 8 * 99 UPPER GREEN RIVER ............................ 12 of 13 * 153 LOWER GREEN RIVER ............................ 7 of 11 * 132 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.