Supercell over Laramie
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Wyoming Snow Precipitation Update

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: MAY 24 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 4.6 .0 * 43.2 24.9 173 Black Bear 8170 44.0 31.8 138 61.7 45.2 137 Blind Bull Sum 8650 -M 17.6 * 39.7 23.7 168 Cottonwood Creek 7670 14.9 2.4 621 45.2 30.5 148 East Rim Divide 7930 .1 .0 * 23.5 14.5 162 Grand Targhee 9260 55.4 41.3 134 53.0 37.6 141 Granite Creek 6770 2.2 .0 * 38.7 23.3 166 Grassy Lake 7265 21.6 13.2 164 62.5 42.5 147 Gros Ventre Summit 8750 -M 2.8 * -M 16.4 * Gunsight Pass 9820 19.5 8.0 244 29.6 18.0 164 Lewis Lake Divide 7850 32.4 19.4 167 60.2 41.5 145 Phillips Bench 8200 28.9 16.0 181 51.4 33.3 154 Salt River Summit 7760 .1 .0 * 32.6 20.2 161 Snake River Station 6920 .0 .0 * 39.6 27.0 147 Spring Creek Divide 9000 37.0 17.5 211 45.8 28.5 161 Thumb Divide 7980 1.0 .0 * 31.2 23.1 135 Togwotee Pass 9580 31.8 22.6 141 44.5 30.1 148 Two Ocean Plateau 9240 -M 27.7 * -M 33.4 * Willow Creek 8380 -M 12.4 * 59.4 41.5 143 Younts Peak 8350 .0 10.2 0 34.0 20.0 170 ----- ----- Basin Index (%) 161 151 MADISON-GALLATIN Black Bear 8170 44.0 31.8 138 61.7 45.2 137 Canyon 7870 5.4 .4 1350* 29.8 20.2 148 Madison Plateau 7750 16.9 12.4 136 41.4 32.1 129 West Yellowstone 6700 .0 .0 * 26.8 17.9 150 Whiskey Creek 6800 1.3 3.1 42 31.1 24.7 126 ----- ----- Basin Index (%) 142 136 YELLOWSTONE Beartooth Lake 9360 33.0 20.6 160 33.1 24.5 135 Burnt Mtn 5880 .0 .0 * 23.6 19.8 119 Canyon 7870 5.4 .4 1350* 29.8 20.2 148 Cole Creek 7850 15.3 14.2 108 19.3 20.1 96 Evening Star 9200 34.8 22.2 157 50.9 33.9 150 Fisher Creek 9100 46.4 31.6 147 53.6 38.9 138 Northeast Entrance 7350 .0 .0 * 23.9 15.9 150 Parker Peak 9400 33.9 18.9 179 41.5 22.9 181 Sylvan Lake 8420 14.7 13.2 111 43.5 28.2 154 Thumb Divide 7980 1.0 .0 * 31.2 23.1 135 Two Ocean Plateau 9240 -M 27.7 * -M 33.4 * White Mill 8700 30.8 21.2 145 40.7 29.4 138 Wolverine 7650 -M .0 * 24.9 15.8 158 ----- ----- Basin Index (%) 151 142 WIND RIVER Burroughs Creek 8750 5.8 -M * 29.9 -M * Castle Creek 8400 .0 -M * 18.6 -M * Cold Springs 9630 5.9 .0 * 24.5 14.7 167 Deer Park 9700 31.5 8.6 366 46.5 26.4 176 Hobbs Park 10100 32.2 11.3 285 37.7 19.7 191 Kirwin 9550 19.1 6.5 294 30.8 16.3 189 Little Warm 9370 10.4 .6 1733* 28.1 17.8 158 Owl Creek 8975 .0 .0 * 17.1 10.0 171 South Pass 9040 28.1 3.3 852 36.6 22.8 161 St. Lawrence Alt 8620 .5 .0 * 22.8 13.8 165 Togwotee Pass 9580 31.8 22.6 141 44.5 30.1 148 Townsend Creek 8700 12.9 .0 * 31.2 17.5 178 ----- ----- Basin Index (%) 326* 169 BIGHORN BASIN Bald Mtn. 9380 20.6 17.6 117 23.2 22.6 103 Bear Trap Meadow 8200 .0 .0 * 17.0 13.1 130 Bone Springs Div 9350 17.8 13.0 137 23.3 21.4 109 Grave Springs 8550 4.1 .1 4100* 15.8 15.4 103 Kirwin 9550 19.1 6.5 294 30.8 16.3 189 Marquette 8760 15.7 -M * 26.7 -M * Middle Powder 7760 2.0 1.6 125 15.6 16.6 94 Owl Creek 8975 .0 .0 * 17.1 10.0 171 Powder River Pass 9480 2.7 2.5 108 19.1 17.9 107 Shell Creek 9580 14.2 14.1 101 19.4 19.1 102 Timber Creek 7950 1.1 .0 * 18.2 12.7 143 ----- ----- Basin Index (%) 147 121 SHOSHONE RIVER Blackwater 9780 38.1 23.4 163 48.2 26.5 182 Evening Star 9200 34.8 22.2 157 50.9 33.9 150 Marquette 8760 15.7 -M * 26.7 -M * Sylvan Road 7120 .0 .0 * 33.3 20.6 162 Younts Peak 8350 .0 10.2 0 34.0 20.0 170 ----- ----- Basin Index (%) 131 165 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 17.0 13.1 130 Cloud Peak Reservoir 9860 18.4 12.6 146 28.6 20.3 141 Grave Springs 8550 4.1 .1 4100* 15.8 15.4 103 Hansen Sawmill 8360 5.7 .0 * 18.9 13.4 141 Middle Powder 7760 2.0 1.6 125 15.6 16.6 94 Powder River Pass 9480 2.7 2.5 108 19.1 17.9 107 Soldier Park 8720 7.4 -M * 22.5 -M * ----- ----- Basin Index (%) 196* 119 TONGUE RIVER Big Goose 7990 8.0 1.3 615 21.5 17.6 122 Bone Springs Div 9350 17.8 13.0 137 23.3 21.4 109 Burgess Junction 7880 5.7 5.4 106 17.7 17.5 101 Dome Lake 8880 13.9 3.2 434 24.7 19.6 126 Little Goose 8870 11.4 -M * 25.8 -M * Sucker Creek 8880 10.5 6.3 167 21.2 20.8 102 Tie Creek 6870 .6 .0 * 24.5 17.9 137 ----- ----- Basin Index (%) 193 116 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.0 15.3 92 ----- ----- Basin Index (%) * 92 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * -M 17.4 * North Rapid Creek 6130 .0 .0 * -M 15.0 * ----- ----- Basin Index (%) * * UPPER N. PLATTE Arapaho Ridge 10960 21.9 14.7 149 32.7 28.8 114 Blackhall Mtn 9820 30.0 -M * 44.6 -M * Columbine 9160 .0 .0 * 34.7 30.9 112 Divide Peak 8880 .0 2.2 0 28.0 26.7 105 Joe Wright 10120 15.9 19.1 83 36.9 33.2 111 Laprele Creek 8375 .2 .0 * 17.5 17.2 102 Med Bow 10500 36.6 -M * 43.2 -M * North French Creek 10130 22.6 26.9 84 36.1 34.2 106 Never Summer 10280 22.2 18.4 121 25.1 -M * Old Battle 10000 38.1 30.7 124 45.7 42.5 108 Rawah 9020 .2 .0 * 22.2 19.1 116 Sage Creek Basin 7850 -M .0 * 19.1 17.6 109 Sand Lake 10050 31.4 25.8 122 34.7 32.3 107 South Brush Creek 8440 .0 .0 * 16.6 20.4 81 Tower 10500 41.8 45.6 92 54.8 48.3 113 Webber Springs 9250 12.0 7.7 156 39.6 32.4 122 Willow Creek Pass 9540 12.5 6.8 184 22.8 17.7 129 Zirkel 9340 10.4 3.3 315 49.7 33.6 148 ----- ----- Basin Index (%) 114 113 SWEETWATER Deer Park 9700 31.5 8.6 366 46.5 26.4 176 Larsen Creek 9000 .3 2.4 12 27.6 -M * South Pass 9040 28.1 3.3 852 36.6 22.8 161 ----- ----- Basin Index (%) 419 169 LOWER N. PLATTE Casper Mtn. 7900 1.4 1.6 88 21.3 20.9 102 Laprele Creek 8375 .2 .0 * 17.5 17.2 102 Reno Hill 8400 2.1 .2 1050* 21.7 21.8 100 Windy Peak 7900 1.0 .0 * 18.0 15.3 118 ----- ----- Basin Index (%) 261* 104 LARAMIE RIVER Brooklyn Lake 10240 13.2 12.8 103 29.2 27.6 106 Cinnabar Park 9574 6.4 8.5 75 29.2 29.8 98 Crow Creek 8330 -M .0 * 15.8 15.6 101 Deadman Hill 10220 17.0 14.0 121 28.8 23.4 123 Rawah 9020 .2 .0 * 22.2 19.1 116 Roach 9700 9.5 8.3 114 28.4 25.0 114 ----- ----- Basin Index (%) 106 109 S. PLATTE Black Mountain 8920 2.1 -M * 20.6 -M * Crow Creek 8330 -M .0 * 15.8 15.6 101 Deadman Hill 10220 17.0 14.0 121 28.8 23.4 123 ----- ----- Basin Index (%) 121* 114 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.5 18.8 109 Divide Peak 8880 .0 2.2 0 28.0 26.7 105 Elk River 8700 .1 .0 * 24.6 24.8 99 Little Snake River 8915 11.9 8.8 135 45.3 35.6 127 Old Battle 10000 38.1 30.7 124 45.7 42.5 108 Sage Creek Basin 7850 -M .0 * 19.1 17.6 109 Sandstone RS 8150 .0 .0 * 19.4 22.7 85 Whiskey Park 8950 15.3 17.5 87 37.3 34.1 109 ----- ----- Basin Index (%) 110 108 UPPER GREEN RIVER Big Sandy Opening 9080 11.6 .2 5800* 27.0 17.2 157 Blind Bull Sum 8650 -M 17.6 * 39.7 23.7 168 East Rim Divide 7930 .1 .0 * 23.5 14.5 162 Elkhart Park G.S. 9400 10.7 3.7 289 27.6 17.1 161 Gros Ventre Summit 8750 -M 2.8 * -M 16.4 * Gunsight Pass 9820 19.5 8.0 244 29.6 18.0 164 Kendall R.S. 7740 .0 .0 * 31.7 17.1 185 Loomis Park 8240 11.1 .1 11100* 35.4 20.9 169 New Fork Lake 8340 -M .0 * 22.1 13.8 160 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 .0 * 29.8 17.1 174 Spring Creek Divide 9000 37.0 17.5 211 45.8 28.5 161 Triple Peak 8500 20.6 4.5 458 45.6 30.7 149 ----- ----- Basin Index (%) 325* 164 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 19.7 -M * Buck Pasture 9632 2.3 -M * 28.4 -M * EF Blacks Fork GS 9360 -M -M * 23.9 -M * Hams Fork 7840 .0 .0 * 24.9 14.7 169 Hewinta 9500 .0 .0 * 22.2 18.0 123 Hickerson Park 9122 .0 .0 * 16.3 13.8 118 Hole-in-Rock 9168 .0 .0 * 17.1 13.4 128 Indian Creek 9425 35.0 15.6 224 46.9 27.4 171 Kelley R.S. 8180 4.7 .3 1567* 35.4 22.2 159 Spirit Lk 10235 3.1 -M * 22.5 -M * Steel Creek Park 10158 15.7 12.8 123 26.6 21.4 124 ----- ----- Basin Index (%) 193* 145 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 22.2 -M * Bug Lake 7987 16.8 .3 5600* 38.9 23.8 163 Burts Miller Ranch 8000 .0 -M * 12.4 -M * Chalk Creek #1 9171 21.0 11.9 176 42.4 31.2 136 Hayden Fork 9130 .1 .0 * 33.2 26.2 127 Kelley R.S. 8180 4.7 .3 1567* 35.4 22.2 159 Lily Lake 9133 .0 .0 * 23.9 21.7 110 Monte Cristo 8932 26.7 10.8 247 46.4 32.0 145 Salt River Summit 7760 .1 .0 * 32.6 20.2 161 ----- ----- Basin Index (%) 298* 143 ----------------------------------------------------------------------------- -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.