Water Resources Data System & State Climate Office

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: AUGUST 18 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 .0 .0 * 47.0 29.7 158 Black Bear 8170 -M .0 * -M 52.1 * Blind Bull Sum 8650 .0 .0 * 43.1 28.3 152 Cottonwood Creek 7670 .0 .0 * 49.3 36.1 137 East Rim Divide 7930 .1 .0 * 26.6 18.1 147 Grand Targhee 9260 .0 .0 * 59.4 44.7 133 Granite Creek 6770 .0 .0 * 44.3 27.6 161 Grassy Lake 7265 .1 .0 * 67.9 49.1 138 Gros Ventre Summit 8750 .0 .0 * 31.8 21.1 151 Gunsight Pass 9820 .0 .0 * 34.9 22.8 153 Lewis Lake Divide 7850 .1 .0 * 68.7 47.9 143 Phillips Bench 8200 .0 .0 * 56.3 38.7 145 Salt River Summit 7760 .1 .0 * 33.5 24.4 137 Snake River Station 6920 .0 .0 * 44.1 32.6 135 Spring Creek Divide 9000 .2 .0 * 48.5 33.2 146 Thumb Divide 7980 .0 .0 * 34.8 27.7 126 Togwotee Pass 9580 .0 .0 * 50.4 35.8 141 Two Ocean Plateau 9240 -M .0 * -M 40.2 * Willow Creek 8380 .0 .0 * 62.8 48.3 130 Younts Peak 8350 .0 .0 * 41.1 26.1 157 ----- ----- Basin Index (%) * 143 MADISON-GALLATIN Black Bear 8170 -M .0 * -M 52.1 * Canyon 7870 .0 .0 * 32.8 25.6 128 Madison Plateau 7750 .0 .0 * 45.7 38.1 120 West Yellowstone 6700 -M .0 * -M 22.3 * Whiskey Creek 6800 .0 .0 * 35.7 30.5 117 ----- ----- Basin Index (%) * 121 YELLOWSTONE Beartooth Lake 9360 .0 .0 * 39.1 30.6 128 Burnt Mtn 5880 -M .0 * -M 27.0 * Canyon 7870 .0 .0 * 32.8 25.6 128 Cole Creek 7850 -M .0 * -M 27.9 * Evening Star 9200 .0 .0 * 57.3 41.5 138 Fisher Creek 9100 .0 .0 * 61.3 48.1 127 Northeast Entrance 7350 .0 .0 * 28.6 22.5 127 Parker Peak 9400 .0 .0 * 48.9 29.3 167 Sylvan Lake 8420 .0 .0 * 48.4 35.2 138 Thumb Divide 7980 .0 .0 * 34.8 27.7 126 Two Ocean Plateau 9240 -M .0 * -M 40.2 * White Mill 8700 .0 .0 * 47.8 37.4 128 Wolverine 7650 .0 .0 * 30.5 21.1 145 ----- ----- Basin Index (%) * 135 WIND RIVER Burroughs Creek 8750 .0 -M * 33.8 -M * Castle Creek 8400 .0 -M * 23.7 -M * Cold Springs 9630 .0 .0 * 28.7 19.5 147 Deer Park 9700 .0 .0 * 51.5 31.9 161 Hobbs Park 10100 .0 .0 * 41.2 25.2 163 Kirwin 9550 .0 .0 * 36.1 23.2 156 Little Warm 9370 .0 .0 * 32.2 23.0 140 Owl Creek 8975 .0 .0 * 22.9 15.2 151 South Pass 9040 .0 .0 * 41.1 27.3 151 St. Lawrence Alt 8620 .0 .0 * 26.2 18.4 142 Togwotee Pass 9580 .0 .0 * 50.4 35.8 141 Townsend Creek 8700 .0 .0 * 35.3 22.2 159 ----- ----- Basin Index (%) * 151 BIGHORN BASIN Bald Mtn. 9380 .0 .0 * 27.5 29.2 94 Bear Trap Meadow 8200 .0 .0 * 20.7 18.4 112 Bone Springs Div 9350 .0 .0 * 31.3 28.3 111 Grave Springs 8550 .0 .0 * 17.6 20.7 85 Kirwin 9550 .0 .0 * 36.1 23.2 156 Marquette 8760 .0 -M * 30.7 -M * Middle Powder 7760 .0 .0 * 19.0 22.3 85 Owl Creek 8975 .0 .0 * 22.9 15.2 151 Powder River Pass 9480 .0 .0 * 26.4 24.1 110 Shell Creek 9580 .0 .0 * 26.6 25.5 104 Timber Creek 7950 .0 .0 * 22.0 18.6 118 ----- ----- Basin Index (%) * 111 SHOSHONE RIVER Blackwater 9780 .0 .0 * 53.8 33.0 163 Evening Star 9200 .0 .0 * 57.3 41.5 138 Marquette 8760 .0 -M * 30.7 -M * Sylvan Road 7120 .0 .0 * 37.7 25.9 146 Younts Peak 8350 .0 .0 * 41.1 26.1 157 ----- ----- Basin Index (%) * 150 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 20.7 18.4 112 Cloud Peak Reservoir 9860 .0 .0 * 34.5 27.4 126 Grave Springs 8550 .0 .0 * 17.6 20.7 85 Hansen Sawmill 8360 .0 .0 * 27.3 19.6 139 Middle Powder 7760 .0 .0 * 19.0 22.3 85 Powder River Pass 9480 .0 .0 * 26.4 24.1 110 Soldier Park 8720 .0 -M * 28.7 -M * ----- ----- Basin Index (%) * 110 TONGUE RIVER Big Goose 7990 .0 .0 * 24.9 22.0 113 Bone Springs Div 9350 .0 .0 * 31.3 28.3 111 Burgess Junction 7880 .0 .0 * 26.5 23.2 114 Dome Lake 8880 .0 .0 * 30.3 25.5 119 Little Goose 8870 .0 -M * 30.3 -M * Sucker Creek 8880 .0 .0 * 30.0 27.2 110 Tie Creek 6870 .0 .0 * 29.3 24.1 122 ----- ----- Basin Index (%) * 115 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 21.5 23.0 93 ----- ----- Basin Index (%) * 93 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 22.1 25.3 87 North Rapid Creek 6130 .0 .0 * 22.5 24.5 92 ----- ----- Basin Index (%) * 90 UPPER N. PLATTE Arapaho Ridge 10960 -M .0 * -M 34.7 * Blackhall Mtn 9820 .6 -M * -M -M * Columbine 9160 .3 .0 * 38.2 35.5 108 Divide Peak 8880 .0 .0 * -M 31.0 * Joe Wright 10120 .4 .0 * 42.9 40.4 106 Laprele Creek 8375 .0 .0 * 22.9 22.1 104 Med Bow 10500 -M -M * 49.7 -M * North French Creek 10130 -M .0 * 40.5 40.3 100 Never Summer 10280 -M .0 * 29.9 -M * Old Battle 10000 .2 .0 * 50.4 48.2 105 Rawah 9020 .0 .0 * 25.8 24.2 107 Sage Creek Basin 7850 -M .0 * -M 20.8 * Sand Lake 10050 .1 .0 * 41.6 38.3 109 South Brush Creek 8440 .0 .0 * 18.9 24.9 76 Tower 10500 -M .0 * -M 54.7 * Webber Springs 9250 -M .0 * -M 37.4 * Willow Creek Pass 9540 .1 .0 * 26.7 23.4 114 Zirkel 9340 -M .0 * -M 39.3 * ----- ----- Basin Index (%) * 104 SWEETWATER Deer Park 9700 .0 .0 * 51.5 31.9 161 Larsen Creek 9000 .0 .0 * 30.7 -M * South Pass 9040 .0 .0 * 41.1 27.3 151 ----- ----- Basin Index (%) * 156 LOWER N. PLATTE Casper Mtn. 7900 .1 .0 * 25.9 25.8 100 Laprele Creek 8375 .0 .0 * 22.9 22.1 104 Reno Hill 8400 .0 .0 * 25.6 26.6 96 Windy Peak 7900 .0 .0 * 21.8 21.0 104 ----- ----- Basin Index (%) * 101 LARAMIE RIVER Brooklyn Lake 10240 .0 .0 * 32.5 33.1 98 Cinnabar Park 9574 .0 .0 * 33.5 35.0 96 Crow Creek 8330 -M .0 * 19.0 23.2 82 Deadman Hill 10220 .0 .0 * 33.6 28.6 117 Rawah 9020 .0 .0 * 25.8 24.2 107 Roach 9700 .0 .0 * 33.2 30.5 109 ----- ----- Basin Index (%) * 102 S. PLATTE Black Mountain 8920 -M -M * 25.1 -M * Crow Creek 8330 -M .0 * 19.0 23.2 82 Deadman Hill 10220 .0 .0 * 33.6 28.6 117 ----- ----- Basin Index (%) * 102 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.7 22.0 103 Divide Peak 8880 .0 .0 * -M 31.0 * Elk River 8700 .0 .0 * 28.1 29.6 95 Little Snake River 8915 .1 .0 * 49.4 40.4 122 Old Battle 10000 .2 .0 * 50.4 48.2 105 Sage Creek Basin 7850 -M .0 * -M 20.8 * Sandstone RS 8150 .0 .0 * 22.8 26.8 85 Whiskey Park 8950 .0 .0 * 39.5 39.0 101 ----- ----- Basin Index (%) * 103 UPPER GREEN RIVER Big Sandy Opening 9080 .0 .0 * 29.9 21.7 138 Blind Bull Sum 8650 .0 .0 * 43.1 28.3 152 East Rim Divide 7930 .1 .0 * 26.6 18.1 147 Elkhart Park G.S. 9400 .0 .0 * 31.3 21.8 144 Gros Ventre Summit 8750 .0 .0 * 31.8 21.1 151 Gunsight Pass 9820 .0 .0 * 34.9 22.8 153 Kendall R.S. 7740 .1 .0 * 36.8 20.8 177 Loomis Park 8240 .0 .0 * 39.7 25.2 158 New Fork Lake 8340 .0 .0 * 26.9 18.1 149 Pocket Creek 9360 .0 -M * -M -M * Snider Basin 8060 .0 .0 * 31.4 20.2 155 Spring Creek Divide 9000 .2 .0 * 48.5 33.2 146 Triple Peak 8500 .0 .0 * 49.6 35.7 139 ----- ----- Basin Index (%) * 150 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 22.2 -M * Buck Pasture 9632 -M -M * 32.3 -M * EF Blacks Fork GS 9360 -M -M * 28.2 -M * Hams Fork 7840 .0 .0 * 27.3 18.1 151 Hewinta 9500 .0 .0 * 26.0 23.2 112 Hickerson Park 9122 .4 .0 * 21.5 18.9 114 Hole-in-Rock 9168 .0 .0 * 22.9 18.4 124 Indian Creek 9425 .0 .0 * 48.9 31.5 155 Kelley R.S. 8180 .2 .0 * 38.7 26.0 149 Spirit Lk 10235 .0 -M * 29.7 -M * Steel Creek Park 10158 -M .0 * 31.9 26.9 119 ----- ----- Basin Index (%) * 133 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 24.0 -M * Bug Lake 7987 .8 .0 * 42.0 27.4 153 Burts Miller Ranch 8000 .0 -M * 13.3 -M * Chalk Creek #1 9171 .0 .0 * 45.9 36.8 125 Hayden Fork 9130 .0 .0 * 36.7 31.0 118 Kelley R.S. 8180 .2 .0 * 38.7 26.0 149 Lily Lake 9133 .0 .0 * 28.1 26.5 106 Monte Cristo 8932 .3 .0 * 50.2 36.5 138 Salt River Summit 7760 .1 .0 * 33.5 24.4 137 ----- ----- Basin Index (%) * 132 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. 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 TOTAL 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. Contact your state water supply staff for assistance. 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. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. 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 TOTAL 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. Contact your state water supply staff for assistance. 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.