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 SUNDAY: MAY 28 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 2.0 .0 * 43.4 25.3 172 Black Bear 8170 41.1 29.0 142 61.9 45.7 135 Blind Bull Sum 8650 -M 15.0 * 39.9 24.0 166 Cottonwood Creek 7670 11.9 .0 * 46.0 31.0 148 East Rim Divide 7930 .0 .0 * 23.7 14.8 160 Grand Targhee 9260 52.3 41.0 128 53.4 38.2 140 Granite Creek 6770 .0 .0 * 39.1 23.7 165 Grassy Lake 7265 18.7 9.4 199 62.9 43.1 146 Gros Ventre Summit 8750 -M .4 * -M 16.7 * Gunsight Pass 9820 18.8 5.2 362 30.1 18.3 164 Lewis Lake Divide 7850 28.6 15.7 182 60.3 42.2 143 Phillips Bench 8200 26.3 12.8 205 51.7 33.8 153 Salt River Summit 7760 .0 .0 * 32.9 20.5 160 Snake River Station 6920 .0 .0 * 39.9 27.3 146 Spring Creek Divide 9000 33.8 14.3 236 46.5 28.8 161 Thumb Divide 7980 .2 .0 * 31.5 23.5 134 Togwotee Pass 9580 31.4 21.2 148 44.9 30.7 146 Two Ocean Plateau 9240 -M 27.0 * -M 33.9 * Willow Creek 8380 -M 7.5 * 60.0 42.0 143 Younts Peak 8350 .0 7.4 0 34.4 20.3 169 ----- ----- Basin Index (%) 170* 151 MADISON-GALLATIN Black Bear 8170 41.1 29.0 142 61.9 45.7 135 Canyon 7870 2.6 .0 * 29.9 20.6 145 Madison Plateau 7750 14.3 9.8 146 41.5 32.6 127 West Yellowstone 6700 .0 .0 * 26.9 18.1 149 Whiskey Creek 6800 -M .3 * 31.4 25.2 125 ----- ----- Basin Index (%) 149* 135 YELLOWSTONE Beartooth Lake 9360 31.9 19.4 164 33.2 24.9 133 Burnt Mtn 5880 .0 .0 * 23.7 20.5 116 Canyon 7870 2.6 .0 * 29.9 20.6 145 Cole Creek 7850 13.5 12.0 112 19.5 20.8 94 Evening Star 9200 34.1 20.4 167 51.1 34.5 148 Fisher Creek 9100 45.3 29.7 153 53.7 39.5 136 Northeast Entrance 7350 .0 .0 * 23.8 16.3 146 Parker Peak 9400 31.7 16.7 190 41.5 23.4 177 Sylvan Lake 8420 12.8 10.6 121 43.6 28.8 151 Thumb Divide 7980 .2 .0 * 31.5 23.5 134 Two Ocean Plateau 9240 -M 27.0 * -M 33.9 * White Mill 8700 28.6 19.5 147 40.7 29.9 136 Wolverine 7650 -M .0 * 24.8 16.2 153 ----- ----- Basin Index (%) 156 140 WIND RIVER Burroughs Creek 8750 3.2 -M * 29.9 -M * Castle Creek 8400 .0 -M * 19.3 -M * Cold Springs 9630 3.8 .0 * 24.8 15.1 164 Deer Park 9700 31.4 6.3 498 47.9 26.8 179 Hobbs Park 10100 31.0 8.8 352 38.6 20.1 192 Kirwin 9550 17.9 4.3 416 31.4 16.6 189 Little Warm 9370 9.1 .0 * 28.3 18.1 156 Owl Creek 8975 .0 .0 * 17.4 10.4 167 South Pass 9040 27.1 1.1 2464* 37.9 23.3 163 St. Lawrence Alt 8620 .0 .0 * 23.4 14.2 165 Togwotee Pass 9580 31.4 21.2 148 44.9 30.7 146 Townsend Creek 8700 11.2 .0 * 31.9 17.9 178 ----- ----- Basin Index (%) 391* 169 BIGHORN BASIN Bald Mtn. 9380 20.3 15.8 128 23.7 23.1 103 Bear Trap Meadow 8200 .0 .0 * 17.1 13.6 126 Bone Springs Div 9350 16.1 11.4 141 23.6 21.9 108 Grave Springs 8550 1.2 .0 * 15.7 15.9 99 Kirwin 9550 17.9 4.3 416 31.4 16.6 189 Marquette 8760 14.3 -M * 26.7 -M * Middle Powder 7760 .0 .0 * 15.7 17.1 92 Owl Creek 8975 .0 .0 * 17.4 10.4 167 Powder River Pass 9480 .6 .0 * 19.2 18.3 105 Shell Creek 9580 13.1 11.9 110 19.7 19.6 101 Timber Creek 7950 .1 .0 * 19.1 13.1 146 ----- ----- Basin Index (%) 160* 119 SHOSHONE RIVER Blackwater 9780 37.1 22.3 166 48.4 27.0 179 Evening Star 9200 34.1 20.4 167 51.1 34.5 148 Marquette 8760 14.3 -M * 26.7 -M * Sylvan Road 7120 .0 .0 * 33.5 21.1 159 Younts Peak 8350 .0 7.4 0 34.4 20.3 169 ----- ----- Basin Index (%) 142 163 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 17.1 13.6 126 Cloud Peak Reservoir 9860 17.2 9.4 183 28.8 20.8 138 Grave Springs 8550 1.2 .0 * 15.7 15.9 99 Hansen Sawmill 8360 3.2 .0 * 18.9 13.8 137 Middle Powder 7760 .0 .0 * 15.7 17.1 92 Powder River Pass 9480 .6 .0 * 19.2 18.3 105 Soldier Park 8720 4.9 -M * 22.8 -M * ----- ----- Basin Index (%) 236* 116 TONGUE RIVER Big Goose 7990 6.3 .0 * 21.7 18.0 121 Bone Springs Div 9350 16.1 11.4 141 23.6 21.9 108 Burgess Junction 7880 3.7 2.2 168 18.4 17.8 103 Dome Lake 8880 12.5 .0 * 25.3 20.0 126 Little Goose 8870 10.0 -M * 26.2 -M * Sucker Creek 8880 9.2 3.2 288 21.4 21.1 101 Tie Creek 6870 .1 .0 * 24.8 18.3 136 ----- ----- Basin Index (%) 285* 115 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.3 16.0 89 ----- ----- Basin Index (%) * 89 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 14.9 17.9 83 North Rapid Creek 6130 .0 .0 * 13.1 15.5 85 ----- ----- Basin Index (%) * 84 UPPER N. PLATTE Arapaho Ridge 10960 20.9 11.1 188 33.5 29.0 116 Blackhall Mtn 9820 28.3 -M * 45.1 -M * Columbine 9160 .0 .0 * 35.3 31.2 113 Divide Peak 8880 .0 .0 * 28.2 27.1 104 Joe Wright 10120 15.0 16.4 91 38.1 33.9 112 Laprele Creek 8375 .2 .0 * 18.0 17.6 102 Med Bow 10500 36.1 -M * 44.1 -M * North French Creek 10130 22.1 24.0 92 36.8 34.7 106 Never Summer 10280 22.2 17.0 131 26.1 -M * Old Battle 10000 37.5 27.3 137 46.4 43.2 107 Rawah 9020 .4 .0 * 23.1 19.3 120 Sage Creek Basin 7850 -M .0 * 19.6 17.7 111 Sand Lake 10050 31.4 22.8 138 35.6 32.7 109 South Brush Creek 8440 .0 .0 * 17.0 20.8 82 Tower 10500 39.7 41.4 96 56.0 48.8 115 Webber Springs 9250 9.4 2.7 348 40.5 32.7 124 Willow Creek Pass 9540 10.9 3.0 363 23.6 18.1 130 Zirkel 9340 6.4 .0 * 50.7 33.8 150 ----- ----- Basin Index (%) 130 114 SWEETWATER Deer Park 9700 31.4 6.3 498 47.9 26.8 179 Larsen Creek 9000 .2 1.2 17* 28.3 -M * South Pass 9040 27.1 1.1 2464* 37.9 23.3 163 ----- ----- Basin Index (%) 683* 171 LOWER N. PLATTE Casper Mtn. 7900 .3 .1 300* 22.0 21.4 103 Laprele Creek 8375 .2 .0 * 18.0 17.6 102 Reno Hill 8400 .2 .0 * 22.3 22.3 100 Windy Peak 7900 .0 .0 * 18.6 15.8 118 ----- ----- Basin Index (%) 700* 105 LARAMIE RIVER Brooklyn Lake 10240 11.3 9.0 126 29.6 28.0 106 Cinnabar Park 9574 4.3 4.6 93 29.5 30.0 98 Crow Creek 8330 .0 .0 * 16.1 15.9 101 Deadman Hill 10220 16.9 11.0 154 29.9 23.7 126 Rawah 9020 .4 .0 * 23.1 19.3 120 Roach 9700 7.3 4.7 155 28.9 25.4 114 ----- ----- Basin Index (%) 137 110 S. PLATTE Black Mountain 8920 .0 -M * 21.2 -M * Crow Creek 8330 .0 .0 * 16.1 15.9 101 Deadman Hill 10220 16.9 11.0 154 29.9 23.7 126 ----- ----- Basin Index (%) 154* 116 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.9 19.0 110 Divide Peak 8880 .0 .0 * 28.2 27.1 104 Elk River 8700 .1 .0 * 25.3 25.2 100 Little Snake River 8915 8.9 5.0 178 45.7 35.8 128 Old Battle 10000 37.5 27.3 137 46.4 43.2 107 Sage Creek Basin 7850 -M .0 * 19.6 17.7 111 Sandstone RS 8150 .0 .0 * 19.8 23.0 86 Whiskey Park 8950 12.6 11.7 108 37.8 34.5 110 ----- ----- Basin Index (%) 134* 108 UPPER GREEN RIVER Big Sandy Opening 9080 8.5 .0 * 27.6 17.6 157 Blind Bull Sum 8650 -M 15.0 * 39.9 24.0 166 East Rim Divide 7930 .0 .0 * 23.7 14.8 160 Elkhart Park G.S. 9400 8.3 1.5 553 27.8 17.5 159 Gros Ventre Summit 8750 -M .4 * -M 16.7 * Gunsight Pass 9820 18.8 5.2 362 30.1 18.3 164 Kendall R.S. 7740 .0 .0 * 31.9 17.4 183 Loomis Park 8240 8.7 .0 * 35.5 21.2 167 New Fork Lake 8340 -M .0 * 22.2 14.2 156 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * 30.1 17.3 174 Spring Creek Divide 9000 33.8 14.3 236 46.5 28.8 161 Triple Peak 8500 18.1 .7 2586* 46.5 31.1 150 ----- ----- Basin Index (%) 443* 163 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 19.8 -M * Buck Pasture 9632 .2 -M * 28.9 -M * EF Blacks Fork GS 9360 -M -M * 24.1 -M * Hams Fork 7840 .0 .0 * 24.9 15.0 166 Hewinta 9500 .0 .0 * 22.3 18.3 122 Hickerson Park 9122 .0 .0 * 16.3 14.1 116 Hole-in-Rock 9168 .0 .0 * 17.2 13.7 126 Indian Creek 9425 30.6 13.0 235 47.0 27.7 170 Kelley R.S. 8180 .0 .0 * 35.6 22.5 158 Spirit Lk 10235 .5 -M * 22.6 -M * Steel Creek Park 10158 13.7 10.9 126 26.8 21.7 124 ----- ----- Basin Index (%) 185* 143 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 22.3 -M * Bug Lake 7987 11.9 .0 * 39.3 24.2 162 Burts Miller Ranch 8000 .0 -M * 12.4 -M * Chalk Creek #1 9171 17.2 8.8 195 42.6 31.7 134 Hayden Fork 9130 .1 .0 * 33.3 26.5 126 Kelley R.S. 8180 .0 .0 * 35.6 22.5 158 Lily Lake 9133 .0 .0 * 24.1 22.1 109 Monte Cristo 8932 21.5 7.1 303 46.5 32.4 144 Salt River Summit 7760 .0 .0 * 32.9 20.5 160 ----- ----- Basin Index (%) 319* 141 ----------------------------------------------------------------------------- -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.