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 THURSDAY: MAY 25 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 3.6 .0 * 43.2 25.0 173 Black Bear 8170 42.8 31.2 137 61.7 45.3 136 Blind Bull Sum 8650 -M 17.1 * 39.7 23.7 168 Cottonwood Creek 7670 14.3 1.4 1021* 45.8 30.6 150 East Rim Divide 7930 .1 .0 * 23.5 14.5 162 Grand Targhee 9260 54.3 41.2 132 53.0 38.0 139 Granite Creek 6770 .8 .0 * 38.7 23.4 165 Grassy Lake 7265 19.8 12.2 162 62.5 42.6 147 Gros Ventre Summit 8750 10.4 2.2 473 27.2 16.5 165 Gunsight Pass 9820 18.8 7.3 258 29.7 18.1 164 Lewis Lake Divide 7850 30.1 18.5 163 60.1 41.7 144 Phillips Bench 8200 27.3 15.2 180 51.3 33.4 154 Salt River Summit 7760 .2 .0 * 32.8 20.3 162 Snake River Station 6920 .0 .0 * 39.6 27.1 146 Spring Creek Divide 9000 35.2 16.7 211 46.1 28.6 161 Thumb Divide 7980 .3 .0 * 31.2 23.2 134 Togwotee Pass 9580 31.3 22.4 140 44.5 30.3 147 Two Ocean Plateau 9240 -M 27.7 * -M 33.5 * Willow Creek 8380 -M 11.1 * 59.5 41.6 143 Younts Peak 8350 .0 9.6 0 34.0 20.0 170 ----- ----- Basin Index (%) 163 152 MADISON-GALLATIN Black Bear 8170 42.8 31.2 137 61.7 45.3 136 Canyon 7870 4.0 .4 1000* 29.8 20.3 147 Madison Plateau 7750 15.7 12.0 131 41.3 32.2 128 West Yellowstone 6700 .0 .0 * 26.8 18.0 149 Whiskey Creek 6800 .0 2.4 0 31.3 24.9 126 ----- ----- Basin Index (%) 136 136 YELLOWSTONE Beartooth Lake 9360 32.4 20.4 159 33.2 24.6 135 Burnt Mtn 5880 .0 .0 * 23.6 20.0 118 Canyon 7870 4.0 .4 1000* 29.8 20.3 147 Cole Creek 7850 14.4 13.6 106 19.3 20.2 96 Evening Star 9200 34.3 21.8 157 51.0 34.1 150 Fisher Creek 9100 45.9 31.2 147 53.7 39.1 137 Northeast Entrance 7350 .0 .0 * 23.8 16.0 149 Parker Peak 9400 32.6 18.5 176 41.3 23.0 180 Sylvan Lake 8420 13.2 12.6 105 43.5 28.3 154 Thumb Divide 7980 .3 .0 * 31.2 23.2 134 Two Ocean Plateau 9240 -M 27.7 * -M 33.5 * White Mill 8700 29.6 20.9 142 40.7 29.5 138 Wolverine 7650 -M .0 * 24.6 15.9 155 ----- ----- Basin Index (%) 148 141 WIND RIVER Burroughs Creek 8750 4.1 -M * 29.9 -M * Castle Creek 8400 .0 -M * 18.7 -M * Cold Springs 9630 4.7 .0 * 24.5 14.8 166 Deer Park 9700 31.7 8.1 391 47.2 26.6 177 Hobbs Park 10100 31.1 10.7 291 37.7 19.8 190 Kirwin 9550 18.0 6.0 300 30.8 16.3 189 Little Warm 9370 9.6 .4 2400* 28.1 17.9 157 Owl Creek 8975 .0 .0 * 17.1 10.1 169 South Pass 9040 28.1 2.6 1081 36.7 22.9 160 St. Lawrence Alt 8620 .1 .0 * 22.9 13.9 165 Togwotee Pass 9580 31.3 22.4 140 44.5 30.3 147 Townsend Creek 8700 11.9 .0 * 31.3 17.6 178 ----- ----- Basin Index (%) 332* 169 BIGHORN BASIN Bald Mtn. 9380 19.9 17.2 116 23.2 22.8 102 Bear Trap Meadow 8200 .0 .0 * 17.3 13.3 130 Bone Springs Div 9350 17.2 12.6 137 23.3 21.6 108 Grave Springs 8550 2.6 .0 * 16.1 15.6 103 Kirwin 9550 18.0 6.0 300 30.8 16.3 189 Marquette 8760 14.5 -M * 26.4 -M * Middle Powder 7760 .6 .8 75* 16.2 16.8 96 Owl Creek 8975 .0 .0 * 17.1 10.1 169 Powder River Pass 9480 1.3 2.0 65 19.1 18.1 106 Shell Creek 9580 13.4 13.7 98 19.5 19.2 102 Timber Creek 7950 .1 .0 * 18.2 12.8 142 ----- ----- Basin Index (%) 140* 121 SHOSHONE RIVER Blackwater 9780 35.9 23.1 155 48.2 26.7 181 Evening Star 9200 34.3 21.8 157 51.0 34.1 150 Marquette 8760 14.5 -M * 26.4 -M * Sylvan Road 7120 .0 .0 * 33.1 20.8 159 Younts Peak 8350 .0 9.6 0 34.0 20.0 170 ----- ----- Basin Index (%) 129 164 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 17.3 13.3 130 Cloud Peak Reservoir 9860 17.6 12.0 147 28.7 20.4 141 Grave Springs 8550 2.6 .0 * 16.1 15.6 103 Hansen Sawmill 8360 4.2 .0 * 18.7 13.6 138 Middle Powder 7760 .6 .8 75* 16.2 16.8 96 Powder River Pass 9480 1.3 2.0 65 19.1 18.1 106 Soldier Park 8720 5.7 -M * 22.5 -M * ----- ----- Basin Index (%) 178* 119 TONGUE RIVER Big Goose 7990 6.6 .9 733* 21.6 17.8 121 Bone Springs Div 9350 17.2 12.6 137 23.3 21.6 108 Burgess Junction 7880 4.4 4.7 94 17.9 17.6 102 Dome Lake 8880 13.1 2.4 546 24.7 19.7 125 Little Goose 8870 10.1 -M * 25.8 -M * Sucker Creek 8880 9.8 5.5 178 21.0 20.9 100 Tie Creek 6870 .1 .0 * 24.5 18.1 135 ----- ----- Basin Index (%) 196 115 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.1 15.6 90 ----- ----- Basin Index (%) * 90 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 14.7 17.6 84 North Rapid Creek 6130 .0 .0 * 13.0 15.1 86 ----- ----- Basin Index (%) * 85 UPPER N. PLATTE Arapaho Ridge 10960 21.0 13.8 152 32.7 28.9 113 Blackhall Mtn 9820 29.1 -M * 44.7 -M * Columbine 9160 .0 .0 * 34.8 30.9 113 Divide Peak 8880 .0 1.3 0* 28.2 26.8 105 Joe Wright 10120 15.3 18.5 83 36.9 33.4 110 Laprele Creek 8375 .3 .0 * 18.0 17.4 103 Med Bow 10500 35.8 -M * 43.3 -M * North French Creek 10130 22.2 26.2 85 36.1 34.3 105 Never Summer 10280 22.1 18.0 123 25.1 -M * Old Battle 10000 37.5 30.0 125 45.9 42.7 107 Rawah 9020 .2 .0 * 22.4 19.1 117 Sage Creek Basin 7850 -M .0 * 19.1 17.7 108 Sand Lake 10050 31.5 25.2 125 34.7 32.4 107 South Brush Creek 8440 .0 .0 * 17.5 20.5 85 Tower 10500 41.6 44.8 93 54.9 48.4 113 Webber Springs 9250 11.0 6.5 169 39.6 32.4 122 Willow Creek Pass 9540 11.6 5.8 200 22.8 17.8 128 Zirkel 9340 8.8 1.9 463* 49.8 33.7 148 ----- ----- Basin Index (%) 116 113 SWEETWATER Deer Park 9700 31.7 8.1 391 47.2 26.6 177 Larsen Creek 9000 .3 2.1 14 28.0 -M * South Pass 9040 28.1 2.6 1081 36.7 22.9 160 ----- ----- Basin Index (%) 470 169 LOWER N. PLATTE Casper Mtn. 7900 .7 1.1 64* 22.0 21.0 105 Laprele Creek 8375 .3 .0 * 18.0 17.4 103 Reno Hill 8400 .8 .0 * 22.4 22.0 102 Windy Peak 7900 .1 .0 * 18.4 15.4 119 ----- ----- Basin Index (%) 173* 107 LARAMIE RIVER Brooklyn Lake 10240 12.7 11.9 107 29.4 27.7 106 Cinnabar Park 9574 5.7 7.5 76 29.2 29.9 98 Crow Creek 8330 .0 .0 * 15.8 15.7 101 Deadman Hill 10220 16.3 13.3 123 28.8 23.4 123 Rawah 9020 .2 .0 * 22.4 19.1 117 Roach 9700 8.5 7.4 115 28.4 25.1 113 ----- ----- Basin Index (%) 108 109 S. PLATTE Black Mountain 8920 .9 -M * 20.7 -M * Crow Creek 8330 .0 .0 * 15.8 15.7 101 Deadman Hill 10220 16.3 13.3 123 28.8 23.4 123 ----- ----- Basin Index (%) 123* 114 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.6 18.9 109 Divide Peak 8880 .0 1.3 0* 28.2 26.8 105 Elk River 8700 .1 .0 * 24.4 24.9 98 Little Snake River 8915 10.3 7.8 132 45.4 35.7 127 Old Battle 10000 37.5 30.0 125 45.9 42.7 107 Sage Creek Basin 7850 -M .0 * 19.1 17.7 108 Sandstone RS 8150 .0 .0 * 19.8 22.8 87 Whiskey Park 8950 13.4 16.1 83 37.3 34.2 109 ----- ----- Basin Index (%) 111* 108 UPPER GREEN RIVER Big Sandy Opening 9080 10.6 .0 * 27.4 17.3 158 Blind Bull Sum 8650 -M 17.1 * 39.7 23.7 168 East Rim Divide 7930 .1 .0 * 23.5 14.5 162 Elkhart Park G.S. 9400 9.8 3.2 306 27.6 17.2 160 Gros Ventre Summit 8750 10.4 2.2 473 27.2 16.5 165 Gunsight Pass 9820 18.8 7.3 258 29.7 18.1 164 Kendall R.S. 7740 .0 .0 * 31.8 17.1 186 Loomis Park 8240 9.8 .0 * 35.4 21.0 169 New Fork Lake 8340 -M .0 * 22.3 13.9 160 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 .0 * 29.9 17.1 175 Spring Creek Divide 9000 35.2 16.7 211 46.1 28.6 161 Triple Peak 8500 19.9 3.5 569 45.8 30.8 149 ----- ----- Basin Index (%) 348* 164 LOWER GREEN RIVER Blacks Fork Jct 8869 .1 -M * 19.7 -M * Buck Pasture 9632 1.0 -M * 28.4 -M * EF Blacks Fork GS 9360 -M -M * 23.8 -M * Hams Fork 7840 .1 .0 * 24.9 14.8 168 Hewinta 9500 .0 .0 * 22.1 18.1 122 Hickerson Park 9122 .1 .0 * 16.3 13.9 117 Hole-in-Rock 9168 .0 .0 * 17.1 13.5 127 Indian Creek 9425 33.6 14.9 226 46.9 27.5 171 Kelley R.S. 8180 3.0 .0 * 35.5 22.3 159 Spirit Lk 10235 1.9 -M * 22.6 -M * Steel Creek Park 10158 14.5 12.2 119 26.6 21.4 124 ----- ----- Basin Index (%) 189* 144 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 22.2 -M * Bug Lake 7987 15.0 .0 * 39.1 23.9 164 Burts Miller Ranch 8000 .0 -M * 12.4 -M * Chalk Creek #1 9171 19.2 11.1 173 42.4 31.4 135 Hayden Fork 9130 .1 .0 * 33.2 26.3 126 Kelley R.S. 8180 3.0 .0 * 35.5 22.3 159 Lily Lake 9133 .0 .0 * 24.0 21.8 110 Monte Cristo 8932 24.3 9.6 253 46.4 32.1 145 Salt River Summit 7760 .2 .0 * 32.8 20.3 162 ----- ----- Basin Index (%) 299* 142 ----------------------------------------------------------------------------- -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.