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 SATURDAY: MAY 27 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 2.9 .0 * 43.3 25.2 172 Black Bear 8170 41.7 29.9 139 61.9 45.6 136 Blind Bull Sum 8650 -M 15.8 * 39.9 23.9 167 Cottonwood Creek 7670 12.9 .3 4300* 46.0 30.9 149 East Rim Divide 7930 .0 .0 * 23.7 14.7 161 Grand Targhee 9260 52.4 41.1 127 53.3 38.1 140 Granite Creek 6770 .1 .0 * 38.9 23.6 165 Grassy Lake 7265 18.9 10.3 183 62.9 42.9 147 Gros Ventre Summit 8750 9.8 .9 1089* 27.4 16.6 165 Gunsight Pass 9820 18.5 5.8 319 30.2 18.2 166 Lewis Lake Divide 7850 29.3 16.7 175 60.4 42.0 144 Phillips Bench 8200 26.4 13.6 194 51.7 33.6 154 Salt River Summit 7760 .1 .0 * 32.8 20.5 160 Snake River Station 6920 .0 .0 * 40.0 27.2 147 Spring Creek Divide 9000 33.7 15.1 223 46.5 28.7 162 Thumb Divide 7980 .1 .0 * 31.5 23.4 135 Togwotee Pass 9580 31.1 21.7 143 44.9 30.5 147 Two Ocean Plateau 9240 -M 27.4 * -M 33.8 * Willow Creek 8380 -M 8.6 * 60.0 41.9 143 Younts Peak 8350 .0 8.3 0 34.1 20.3 168 ----- ----- Basin Index (%) 170* 151 MADISON-GALLATIN Black Bear 8170 41.7 29.9 139 61.9 45.6 136 Canyon 7870 3.4 .0 * 29.8 20.5 145 Madison Plateau 7750 14.6 10.7 136 41.5 32.4 128 West Yellowstone 6700 .0 .0 * 26.9 18.1 149 Whiskey Creek 6800 .0 1.1 0* 31.1 25.0 124 ----- ----- Basin Index (%) 143* 135 YELLOWSTONE Beartooth Lake 9360 32.2 19.8 163 33.2 24.8 134 Burnt Mtn 5880 .0 .0 * 23.7 20.4 116 Canyon 7870 3.4 .0 * 29.8 20.5 145 Cole Creek 7850 14.1 12.5 113 19.3 20.6 94 Evening Star 9200 33.7 20.9 161 51.1 34.4 149 Fisher Creek 9100 46.0 30.2 152 53.7 39.4 136 Northeast Entrance 7350 .0 .0 * 23.8 16.2 147 Parker Peak 9400 31.8 17.4 183 41.4 23.3 178 Sylvan Lake 8420 12.7 11.4 111 43.6 28.6 152 Thumb Divide 7980 .1 .0 * 31.5 23.4 135 Two Ocean Plateau 9240 -M 27.4 * -M 33.8 * White Mill 8700 29.2 20.0 146 40.6 29.8 136 Wolverine 7650 -M .0 * 24.7 16.1 153 ----- ----- Basin Index (%) 154 140 WIND RIVER Burroughs Creek 8750 3.8 -M * 29.7 -M * Castle Creek 8400 .2 -M * 19.4 -M * Cold Springs 9630 4.1 .0 * 24.6 15.0 164 Deer Park 9700 32.0 7.0 457 47.8 26.8 178 Hobbs Park 10100 30.7 9.6 320 38.0 20.0 190 Kirwin 9550 17.9 5.0 358 31.0 16.5 188 Little Warm 9370 9.1 .0 * 28.2 18.0 157 Owl Creek 8975 .0 .0 * 17.4 10.3 169 South Pass 9040 27.4 1.5 1827* 37.4 23.2 161 St. Lawrence Alt 8620 .2 .0 * 23.4 14.1 166 Togwotee Pass 9580 31.1 21.7 143 44.9 30.5 147 Townsend Creek 8700 11.4 .0 * 31.6 17.8 178 ----- ----- Basin Index (%) 366* 169 BIGHORN BASIN Bald Mtn. 9380 20.2 16.3 124 23.3 23.0 101 Bear Trap Meadow 8200 .0 .0 * 17.0 13.5 126 Bone Springs Div 9350 16.3 11.8 138 23.4 21.8 107 Grave Springs 8550 1.9 .0 * 15.4 15.9 97 Kirwin 9550 17.9 5.0 358 31.0 16.5 188 Marquette 8760 14.5 -M * 26.6 -M * Middle Powder 7760 .0 .0 * 15.5 17.0 91 Owl Creek 8975 .0 .0 * 17.4 10.3 169 Powder River Pass 9480 .9 .2 450* 19.2 18.2 105 Shell Creek 9580 13.1 12.6 104 19.7 19.4 102 Timber Creek 7950 .6 .0 * 19.1 13.0 147 ----- ----- Basin Index (%) 154* 119 SHOSHONE RIVER Blackwater 9780 36.5 22.7 161 48.3 26.9 180 Evening Star 9200 33.7 20.9 161 51.1 34.4 149 Marquette 8760 14.5 -M * 26.6 -M * Sylvan Road 7120 .0 .0 * 33.5 20.9 160 Younts Peak 8350 .0 8.3 0 34.1 20.3 168 ----- ----- Basin Index (%) 135 163 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 17.0 13.5 126 Cloud Peak Reservoir 9860 17.2 10.3 167 28.7 20.7 139 Grave Springs 8550 1.9 .0 * 15.4 15.9 97 Hansen Sawmill 8360 3.6 .0 * 18.9 13.8 137 Middle Powder 7760 .0 .0 * 15.5 17.0 91 Powder River Pass 9480 .9 .2 450* 19.2 18.2 105 Soldier Park 8720 5.2 -M * 22.7 -M * ----- ----- Basin Index (%) 225* 116 TONGUE RIVER Big Goose 7990 6.3 .0 * 21.6 18.0 120 Bone Springs Div 9350 16.3 11.8 138 23.4 21.8 107 Burgess Junction 7880 4.2 3.0 140 17.7 17.7 100 Dome Lake 8880 12.6 .8 1575* 25.1 19.9 126 Little Goose 8870 10.1 -M * 26.1 -M * Sucker Creek 8880 9.4 4.0 235 21.1 21.1 100 Tie Creek 6870 .1 .0 * 24.8 18.3 136 ----- ----- Basin Index (%) 249* 114 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.3 16.0 89 ----- ----- Basin Index (%) * 89 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 14.8 17.8 83 North Rapid Creek 6130 .0 .0 * 13.1 15.5 85 ----- ----- Basin Index (%) * 84 UPPER N. PLATTE Arapaho Ridge 10960 20.6 12.0 172 33.1 28.9 115 Blackhall Mtn 9820 28.5 -M * 44.9 -M * Columbine 9160 .0 .0 * 35.1 31.1 113 Divide Peak 8880 .0 .1 0* 28.1 27.0 104 Joe Wright 10120 14.5 17.1 85 37.4 33.7 111 Laprele Creek 8375 .2 .0 * 17.8 17.6 101 Med Bow 10500 36.1 -M * 44.0 -M * North French Creek 10130 22.1 24.7 89 36.7 34.6 106 Never Summer 10280 21.8 17.3 126 25.7 -M * Old Battle 10000 37.3 28.2 132 45.9 43.1 106 Rawah 9020 .3 .0 * 22.6 19.3 117 Sage Creek Basin 7850 -M .0 * 19.6 17.7 111 Sand Lake 10050 31.1 23.6 132 35.1 32.6 108 South Brush Creek 8440 .0 .0 * 16.9 20.7 82 Tower 10500 39.7 42.6 93 55.4 48.7 114 Webber Springs 9250 9.3 4.0 232 40.3 32.6 124 Willow Creek Pass 9540 10.4 3.9 267 23.3 18.0 129 Zirkel 9340 6.2 .0 * 50.6 33.8 150 ----- ----- Basin Index (%) 123 113 SWEETWATER Deer Park 9700 32.0 7.0 457 47.8 26.8 178 Larsen Creek 9000 .2 1.5 13 28.3 -M * South Pass 9040 27.4 1.5 1827* 37.4 23.2 161 ----- ----- Basin Index (%) 596 170 LOWER N. PLATTE Casper Mtn. 7900 .2 .3 67* 21.9 21.2 103 Laprele Creek 8375 .2 .0 * 17.8 17.6 101 Reno Hill 8400 .3 .0 * 22.0 22.2 99 Windy Peak 7900 .0 .0 * 18.4 15.6 118 ----- ----- Basin Index (%) 233* 105 LARAMIE RIVER Brooklyn Lake 10240 11.4 10.0 114 29.4 27.9 105 Cinnabar Park 9574 4.7 5.5 85 29.4 30.0 98 Crow Creek 8330 .0 .0 * 16.0 15.8 101 Deadman Hill 10220 16.4 11.8 139 29.4 23.6 125 Rawah 9020 .3 .0 * 22.6 19.3 117 Roach 9700 7.2 5.6 129 28.8 25.3 114 ----- ----- Basin Index (%) 122 110 S. PLATTE Black Mountain 8920 .1 -M * 21.0 -M * Crow Creek 8330 .0 .0 * 16.0 15.8 101 Deadman Hill 10220 16.4 11.8 139 29.4 23.6 125 ----- ----- Basin Index (%) 139* 115 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.9 19.0 110 Divide Peak 8880 .0 .1 0* 28.1 27.0 104 Elk River 8700 .3 .0 * 25.1 25.1 100 Little Snake River 8915 8.9 5.9 151 45.7 35.8 128 Old Battle 10000 37.3 28.2 132 45.9 43.1 106 Sage Creek Basin 7850 -M .0 * 19.6 17.7 111 Sandstone RS 8150 .0 .0 * 19.5 23.0 85 Whiskey Park 8950 12.0 13.0 92 37.7 34.4 110 ----- ----- Basin Index (%) 124* 108 UPPER GREEN RIVER Big Sandy Opening 9080 9.1 .0 * 27.6 17.5 158 Blind Bull Sum 8650 -M 15.8 * 39.9 23.9 167 East Rim Divide 7930 .0 .0 * 23.7 14.7 161 Elkhart Park G.S. 9400 8.9 2.1 424 27.8 17.4 160 Gros Ventre Summit 8750 9.8 .9 1089* 27.4 16.6 165 Gunsight Pass 9820 18.5 5.8 319 30.2 18.2 166 Kendall R.S. 7740 .0 .0 * 31.9 17.3 184 Loomis Park 8240 9.1 .0 * 35.5 21.1 168 New Fork Lake 8340 -M .0 * 22.1 14.1 157 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 30.0 17.2 174 Spring Creek Divide 9000 33.7 15.1 223 46.5 28.7 162 Triple Peak 8500 18.3 1.7 1076* 46.2 31.0 149 ----- ----- Basin Index (%) 420* 164 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 19.8 -M * Buck Pasture 9632 .4 -M * 28.9 -M * EF Blacks Fork GS 9360 -M -M * 24.1 -M * Hams Fork 7840 .0 .0 * 24.9 14.9 167 Hewinta 9500 .0 .0 * 22.3 18.2 123 Hickerson Park 9122 .0 .0 * 16.3 14.1 116 Hole-in-Rock 9168 .0 .0 * 17.2 13.6 126 Indian Creek 9425 31.4 13.6 231 46.9 27.7 169 Kelley R.S. 8180 1.1 .0 * 35.6 22.4 159 Spirit Lk 10235 .9 -M * 22.6 -M * Steel Creek Park 10158 14.1 11.2 126 26.8 21.6 124 ----- ----- Basin Index (%) 188* 143 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 22.3 -M * Bug Lake 7987 13.0 .0 * 39.3 24.1 163 Burts Miller Ranch 8000 .0 -M * 12.3 -M * Chalk Creek #1 9171 18.3 9.5 193 42.6 31.6 135 Hayden Fork 9130 .2 .0 * 33.3 26.4 126 Kelley R.S. 8180 1.1 .0 * 35.6 22.4 159 Lily Lake 9133 .0 .0 * 24.1 22.0 110 Monte Cristo 8932 22.2 7.9 281 46.5 32.4 144 Salt River Summit 7760 .1 .0 * 32.8 20.5 160 ----- ----- Basin Index (%) 316* 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.