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 TUESDAY: AUGUST 22 , 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 * 46.8 29.9 157 Black Bear 8170 .0 .0 * 66.9 52.3 128 Blind Bull Sum 8650 .0 .0 * 43.1 28.6 151 Cottonwood Creek 7670 .0 .0 * 49.3 36.4 135 East Rim Divide 7930 .2 .0 * 26.6 18.2 146 Grand Targhee 9260 .0 .0 * 59.3 45.0 132 Granite Creek 6770 .0 .0 * 44.3 27.7 160 Grassy Lake 7265 .0 .0 * 67.9 49.3 138 Gros Ventre Summit 8750 .0 .0 * 31.8 21.3 149 Gunsight Pass 9820 .0 .0 * 34.9 23.1 151 Lewis Lake Divide 7850 .0 .0 * 68.7 48.1 143 Phillips Bench 8200 .0 .0 * 56.3 39.0 144 Salt River Summit 7760 .0 .0 * 33.5 24.6 136 Snake River Station 6920 .0 .0 * 44.1 32.8 134 Spring Creek Divide 9000 .2 .0 * 48.5 33.4 145 Thumb Divide 7980 .0 .0 * 34.8 27.9 125 Togwotee Pass 9580 .0 .0 * 50.4 36.0 140 Two Ocean Plateau 9240 -M .0 * -M 40.5 * Willow Creek 8380 .0 .0 * 62.8 48.6 129 Younts Peak 8350 .0 .0 * 41.0 26.4 155 ----- ----- Basin Index (%) * 140 MADISON-GALLATIN Black Bear 8170 .0 .0 * 66.9 52.3 128 Canyon 7870 .0 .0 * 32.8 25.8 127 Madison Plateau 7750 .0 .0 * 45.7 38.3 119 West Yellowstone 6700 .0 .0 * 30.3 22.4 135 Whiskey Creek 6800 .0 .0 * 35.7 30.7 116 ----- ----- Basin Index (%) * 125 YELLOWSTONE Beartooth Lake 9360 .0 .0 * 39.2 30.8 127 Burnt Mtn 5880 .0 .0 * 27.6 27.2 101 Canyon 7870 .0 .0 * 32.8 25.8 127 Cole Creek 7850 .0 .0 * 22.5 28.1 80 Evening Star 9200 .0 .0 * 57.3 41.8 137 Fisher Creek 9100 .0 .0 * 61.3 48.4 127 Northeast Entrance 7350 .0 .0 * 28.6 22.8 125 Parker Peak 9400 .0 .0 * 48.8 29.6 165 Sylvan Lake 8420 .0 .0 * 48.3 35.5 136 Thumb Divide 7980 .0 .0 * 34.8 27.9 125 Two Ocean Plateau 9240 -M .0 * -M 40.5 * White Mill 8700 .0 .0 * 47.7 37.8 126 Wolverine 7650 .0 .0 * 30.4 21.4 142 ----- ----- Basin Index (%) * 127 WIND RIVER Burroughs Creek 8750 .0 -M * 33.9 -M * Castle Creek 8400 .0 -M * 23.7 -M * Cold Springs 9630 .0 .0 * 28.9 19.7 147 Deer Park 9700 .0 .0 * 51.5 32.3 159 Hobbs Park 10100 .0 .0 * 41.4 25.5 162 Kirwin 9550 .0 .0 * 36.1 23.4 154 Little Warm 9370 .0 .0 * 32.2 23.3 138 Owl Creek 8975 .0 .0 * 22.8 15.3 149 South Pass 9040 .0 .0 * 41.3 27.5 150 St. Lawrence Alt 8620 .0 .0 * 26.3 18.6 141 Togwotee Pass 9580 .0 .0 * 50.4 36.0 140 Townsend Creek 8700 .0 .0 * 35.3 22.4 158 ----- ----- Basin Index (%) * 150 BIGHORN BASIN Bald Mtn. 9380 .0 .0 * 27.6 29.3 94 Bear Trap Meadow 8200 .0 .0 * 20.8 18.6 112 Bone Springs Div 9350 .0 .0 * 31.3 28.4 110 Grave Springs 8550 .0 .0 * 17.6 20.8 85 Kirwin 9550 .0 .0 * 36.1 23.4 154 Marquette 8760 .0 -M * 30.7 -M * Middle Powder 7760 .0 .0 * 19.1 22.4 85 Owl Creek 8975 .0 .0 * 22.8 15.3 149 Powder River Pass 9480 .0 .0 * 26.4 24.2 109 Shell Creek 9580 .0 .0 * 26.2 25.6 102 Timber Creek 7950 .0 .0 * 22.0 18.8 117 ----- ----- Basin Index (%) * 110 SHOSHONE RIVER Blackwater 9780 .0 .0 * 53.9 33.3 162 Evening Star 9200 .0 .0 * 57.3 41.8 137 Marquette 8760 .0 -M * 30.7 -M * Sylvan Road 7120 .0 .0 * 37.6 26.2 144 Younts Peak 8350 .0 .0 * 41.0 26.4 155 ----- ----- Basin Index (%) * 149 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 20.8 18.6 112 Cloud Peak Reservoir 9860 .0 .0 * 34.5 27.6 125 Grave Springs 8550 .0 .0 * 17.6 20.8 85 Hansen Sawmill 8360 .0 .0 * 27.3 19.7 139 Middle Powder 7760 .0 .0 * 19.1 22.4 85 Powder River Pass 9480 .0 .0 * 26.4 24.2 109 Soldier Park 8720 .0 -M * 28.6 -M * ----- ----- Basin Index (%) * 109 TONGUE RIVER Big Goose 7990 .0 .0 * 24.9 22.1 113 Bone Springs Div 9350 .0 .0 * 31.3 28.4 110 Burgess Junction 7880 .0 .0 * 26.1 23.3 112 Dome Lake 8880 .0 .0 * 30.1 25.6 118 Little Goose 8870 .0 -M * 30.3 -M * Sucker Creek 8880 .0 .0 * 30.2 27.3 111 Tie Creek 6870 .0 .0 * 29.3 24.4 120 ----- ----- Basin Index (%) * 114 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 21.5 23.2 93 ----- ----- Basin Index (%) * 93 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 22.1 25.4 87 North Rapid Creek 6130 .0 .0 * 22.5 24.7 91 ----- ----- Basin Index (%) * 89 UPPER N. PLATTE Arapaho Ridge 10960 -M .0 * -M 35.2 * Blackhall Mtn 9820 .7 -M * 47.7 -M * Columbine 9160 .3 .0 * 38.3 35.8 107 Divide Peak 8880 .0 .0 * 29.6 31.2 95 Joe Wright 10120 .4 .0 * 42.9 40.8 105 Laprele Creek 8375 .0 .0 * 22.9 22.3 103 Med Bow 10500 -M -M * 49.7 -M * North French Creek 10130 -M .0 * 40.6 40.5 100 Never Summer 10280 -M .0 * 30.0 -M * Old Battle 10000 .2 .0 * 50.4 48.4 104 Rawah 9020 .1 .0 * 25.8 24.6 105 Sage Creek Basin 7850 -M .0 * 21.3 21.0 101 Sand Lake 10050 .0 .0 * 41.1 38.5 107 South Brush Creek 8440 .0 .0 * 18.9 25.1 75 Tower 10500 -M .0 * -M 55.0 * Webber Springs 9250 -M .0 * 43.0 37.5 115 Willow Creek Pass 9540 .1 .0 * 26.9 23.7 114 Zirkel 9340 .0 .0 * 54.4 39.6 137 ----- ----- Basin Index (%) * 106 SWEETWATER Deer Park 9700 .0 .0 * 51.5 32.3 159 Larsen Creek 9000 .0 .0 * 30.7 -M * South Pass 9040 .0 .0 * 41.3 27.5 150 ----- ----- Basin Index (%) * 155 LOWER N. PLATTE Casper Mtn. 7900 .1 .0 * 25.9 25.9 100 Laprele Creek 8375 .0 .0 * 22.9 22.3 103 Reno Hill 8400 .0 .0 * 25.6 26.8 96 Windy Peak 7900 .0 .0 * 22.1 21.1 105 ----- ----- Basin Index (%) * 100 LARAMIE RIVER Brooklyn Lake 10240 .0 .0 * 32.4 33.3 97 Cinnabar Park 9574 .0 .0 * 33.5 35.3 95 Crow Creek 8330 -M .0 * 19.0 23.5 81 Deadman Hill 10220 .0 .0 * 33.7 28.8 117 Rawah 9020 .1 .0 * 25.8 24.6 105 Roach 9700 .0 .0 * 33.2 30.8 108 ----- ----- Basin Index (%) * 101 S. PLATTE Black Mountain 8920 -M -M * 25.2 -M * Crow Creek 8330 -M .0 * 19.0 23.5 81 Deadman Hill 10220 .0 .0 * 33.7 28.8 117 ----- ----- Basin Index (%) * 101 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.5 22.2 101 Divide Peak 8880 .0 .0 * 29.6 31.2 95 Elk River 8700 .0 .0 * 28.0 29.8 94 Little Snake River 8915 .1 .0 * 49.4 40.5 122 Old Battle 10000 .2 .0 * 50.4 48.4 104 Sage Creek Basin 7850 -M .0 * 21.3 21.0 101 Sandstone RS 8150 .0 .0 * 22.8 26.9 85 Whiskey Park 8950 .0 .0 * 39.5 39.2 101 ----- ----- Basin Index (%) * 102 UPPER GREEN RIVER Big Sandy Opening 9080 .0 .0 * 29.9 21.9 137 Blind Bull Sum 8650 .0 .0 * 43.1 28.6 151 East Rim Divide 7930 .2 .0 * 26.6 18.2 146 Elkhart Park G.S. 9400 .1 .0 * 31.3 22.1 142 Gros Ventre Summit 8750 .0 .0 * 31.8 21.3 149 Gunsight Pass 9820 .0 .0 * 34.9 23.1 151 Kendall R.S. 7740 .1 .0 * 36.8 21.0 175 Loomis Park 8240 .0 .0 * 39.7 25.5 156 New Fork Lake 8340 .0 .0 * 26.9 18.3 147 Pocket Creek 9360 .0 -M * -M -M * Snider Basin 8060 .0 .0 * 31.5 20.3 155 Spring Creek Divide 9000 .2 .0 * 48.5 33.4 145 Triple Peak 8500 .0 .0 * 49.6 35.9 138 ----- ----- Basin Index (%) * 149 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 22.2 -M * Buck Pasture 9632 -M -M * 32.4 -M * EF Blacks Fork GS 9360 -M -M * 28.3 -M * Hams Fork 7840 .0 .0 * 27.2 18.3 149 Hewinta 9500 .0 .0 * 26.0 23.5 111 Hickerson Park 9122 .4 .0 * 21.5 19.3 111 Hole-in-Rock 9168 .0 .0 * 23.0 18.8 122 Indian Creek 9425 .0 .0 * 48.9 31.7 154 Kelley R.S. 8180 .2 .0 * 38.7 26.2 148 Spirit Lk 10235 .0 -M * 29.8 -M * Steel Creek Park 10158 -M .0 * 32.0 27.2 118 ----- ----- Basin Index (%) * 132 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 24.0 -M * Bug Lake 7987 .8 .0 * 41.9 27.6 152 Burts Miller Ranch 8000 .0 -M * 13.2 -M * Chalk Creek #1 9171 .0 .0 * 46.1 37.1 124 Hayden Fork 9130 .0 .0 * 36.7 31.4 117 Kelley R.S. 8180 .2 .0 * 38.7 26.2 148 Lily Lake 9133 .0 .0 * 28.1 26.8 105 Monte Cristo 8932 .3 .0 * 50.1 36.6 137 Salt River Summit 7760 .0 .0 * 33.5 24.6 136 ----- ----- Basin Index (%) * 131 ----------------------------------------------------------------------------- -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.