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 31 , 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 * 43.4 25.6 170 Black Bear 8170 37.8 25.7 147 61.9 46.2 134 Blind Bull Sum 8650 -M 12.3 * 40.0 24.3 165 Cottonwood Creek 7670 7.4 .0 * 46.1 31.3 147 East Rim Divide 7930 .1 .0 * 23.7 15.0 158 Grand Targhee 9260 51.1 40.3 127 53.5 38.6 139 Granite Creek 6770 .0 .0 * 40.1 24.0 167 Grassy Lake 7265 14.5 5.9 246 62.9 43.6 144 Gros Ventre Summit 8750 -M .0 * -M 17.0 * Gunsight Pass 9820 16.3 3.4 479 30.1 18.6 162 Lewis Lake Divide 7850 24.7 12.6 196 60.5 42.6 142 Phillips Bench 8200 23.0 10.5 219 51.7 34.1 152 Salt River Summit 7760 .0 .0 * 32.8 20.8 158 Snake River Station 6920 .0 .0 * 39.9 27.7 144 Spring Creek Divide 9000 29.8 12.3 242 46.5 29.1 160 Thumb Divide 7980 .4 .0 * 31.5 23.8 132 Togwotee Pass 9580 28.7 19.4 148 44.9 30.9 145 Two Ocean Plateau 9240 -M 25.5 * -M 34.3 * Willow Creek 8380 -M 4.6 * 60.0 42.5 141 Younts Peak 8350 .1 4.1 2 35.3 20.6 171 ----- ----- Basin Index (%) 174* 149 MADISON-GALLATIN Black Bear 8170 37.8 25.7 147 61.9 46.2 134 Canyon 7870 .1 .0 * 30.0 20.9 144 Madison Plateau 7750 11.1 7.1 156 41.6 33.0 126 West Yellowstone 6700 .0 .0 * 26.9 18.5 145 Whiskey Creek 6800 -M .0 * 31.9 25.6 125 ----- ----- Basin Index (%) 149* 133 YELLOWSTONE Beartooth Lake 9360 30.0 17.8 169 33.4 25.1 133 Burnt Mtn 5880 .0 .0 * 23.7 20.7 114 Canyon 7870 .1 .0 * 30.0 20.9 144 Cole Creek 7850 11.8 10.0 118 19.6 21.2 92 Evening Star 9200 31.5 18.5 170 51.3 34.8 147 Fisher Creek 9100 40.2 28.5 141 53.7 39.9 135 Northeast Entrance 7350 .0 .0 * 23.8 16.6 143 Parker Peak 9400 28.5 14.5 197 41.6 23.7 176 Sylvan Lake 8420 9.4 7.6 124 43.7 29.2 150 Thumb Divide 7980 .4 .0 * 31.5 23.8 132 Two Ocean Plateau 9240 -M 25.5 * -M 34.3 * White Mill 8700 25.8 17.6 147 40.8 30.3 135 Wolverine 7650 -M .0 * 24.9 16.4 152 ----- ----- Basin Index (%) 155 138 WIND RIVER Burroughs Creek 8750 .0 -M * 30.5 -M * Castle Creek 8400 .0 -M * 19.3 -M * Cold Springs 9630 .3 .0 * 25.0 15.3 163 Deer Park 9700 30.5 3.9 782 48.0 27.0 178 Hobbs Park 10100 29.8 6.7 445 38.9 20.4 191 Kirwin 9550 15.0 2.2 682 31.4 16.9 186 Little Warm 9370 6.8 .0 * 28.3 18.4 154 Owl Creek 8975 .0 .0 * 17.6 10.7 164 South Pass 9040 27.4 .4 6850* 38.2 23.5 163 St. Lawrence Alt 8620 .0 .0 * 23.5 14.4 163 Togwotee Pass 9580 28.7 19.4 148 44.9 30.9 145 Townsend Creek 8700 8.4 .0 * 32.1 18.1 177 ----- ----- Basin Index (%) 451* 168 BIGHORN BASIN Bald Mtn. 9380 18.5 14.2 130 23.8 23.4 102 Bear Trap Meadow 8200 .0 .0 * 17.4 13.8 126 Bone Springs Div 9350 14.5 9.3 156 23.9 22.1 108 Grave Springs 8550 .3 .0 * 16.1 16.1 100 Kirwin 9550 15.0 2.2 682 31.4 16.9 186 Marquette 8760 11.5 -M * 26.6 -M * Middle Powder 7760 .0 .0 * 16.4 17.3 95 Owl Creek 8975 .0 .0 * 17.6 10.7 164 Powder River Pass 9480 .0 .0 * 19.6 18.6 105 Shell Creek 9580 12.1 9.7 125 19.9 19.8 101 Timber Creek 7950 .0 .0 * 19.1 13.5 141 ----- ----- Basin Index (%) 171* 119 SHOSHONE RIVER Blackwater 9780 35.5 20.2 176 48.5 27.3 178 Evening Star 9200 31.5 18.5 170 51.3 34.8 147 Marquette 8760 11.5 -M * 26.6 -M * Sylvan Road 7120 .0 .0 * 33.3 21.3 156 Younts Peak 8350 .1 4.1 2 35.3 20.6 171 ----- ----- Basin Index (%) 157 162 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 17.4 13.8 126 Cloud Peak Reservoir 9860 16.3 6.2 263 29.0 21.1 137 Grave Springs 8550 .3 .0 * 16.1 16.1 100 Hansen Sawmill 8360 .6 .0 * -M 14.1 * Middle Powder 7760 .0 .0 * 16.4 17.3 95 Powder River Pass 9480 .0 .0 * 19.6 18.6 105 Soldier Park 8720 2.6 -M * 23.0 -M * ----- ----- Basin Index (%) 277* 113 TONGUE RIVER Big Goose 7990 3.8 .0 * 21.9 18.1 121 Bone Springs Div 9350 14.5 9.3 156 23.9 22.1 108 Burgess Junction 7880 1.1 .1 1100* 19.4 18.0 108 Dome Lake 8880 10.6 .0 * 25.4 20.2 126 Little Goose 8870 8.3 -M * 26.4 -M * Sucker Creek 8880 6.9 .6 1150* 21.7 21.4 101 Tie Creek 6870 .1 .0 * 24.8 18.6 133 ----- ----- Basin Index (%) 370* 116 BELLE FOURCHE Cole Canyon 5910 .0 .0 * 14.3 16.5 87 ----- ----- Basin Index (%) * 87 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 15.1 18.2 83 North Rapid Creek 6130 .0 .0 * 13.3 15.8 84 ----- ----- Basin Index (%) * 84 UPPER N. PLATTE Arapaho Ridge 10960 19.2 8.5 226 33.5 29.1 115 Blackhall Mtn 9820 26.9 -M * 45.2 -M * Columbine 9160 .0 .0 * 35.4 31.4 113 Divide Peak 8880 .0 .0 * 28.5 27.3 104 Joe Wright 10120 14.2 14.5 98 38.1 34.2 111 Laprele Creek 8375 .3 .0 * 18.6 17.9 104 Med Bow 10500 35.3 -M * 44.2 -M * North French Creek 10130 20.4 21.2 96 36.8 35.0 105 Never Summer 10280 22.3 15.9 140 26.2 -M * Old Battle 10000 36.2 24.8 146 47.0 43.4 108 Rawah 9020 .1 .0 * 23.1 19.5 118 Sage Creek Basin 7850 -M .0 * 19.6 17.8 110 Sand Lake 10050 30.1 20.9 144 35.8 33.0 108 South Brush Creek 8440 .0 .0 * 17.9 21.0 85 Tower 10500 38.8 37.4 104 56.4 49.1 115 Webber Springs 9250 7.2 .0 * 40.4 33.0 122 Willow Creek Pass 9540 8.4 .0 * 23.6 18.4 128 Zirkel 9340 2.5 .0 * 50.7 33.9 150 ----- ----- Basin Index (%) 139* 114 SWEETWATER Deer Park 9700 30.5 3.9 782 48.0 27.0 178 Larsen Creek 9000 .1 .3 33* 28.4 -M * South Pass 9040 27.4 .4 6850* 38.2 23.5 163 ----- ----- Basin Index (%) 1261* 171 LOWER N. PLATTE Casper Mtn. 7900 .4 .0 * 22.6 21.6 105 Laprele Creek 8375 .3 .0 * 18.6 17.9 104 Reno Hill 8400 .1 .0 * 22.9 22.6 101 Windy Peak 7900 .0 .0 * 18.9 16.0 118 ----- ----- Basin Index (%) * 106 LARAMIE RIVER Brooklyn Lake 10240 7.9 5.9 134 29.9 28.3 106 Cinnabar Park 9574 1.8 1.9 95* 29.4 30.2 97 Crow Creek 8330 .0 .0 * 16.1 16.1 100 Deadman Hill 10220 16.3 8.7 187 30.1 24.0 125 Rawah 9020 .1 .0 * 23.1 19.5 118 Roach 9700 4.9 2.4 204 29.0 25.6 113 ----- ----- Basin Index (%) 164 110 S. PLATTE Black Mountain 8920 -M -M * 21.2 -M * Crow Creek 8330 .0 .0 * 16.1 16.1 100 Deadman Hill 10220 16.3 8.7 187 30.1 24.0 125 ----- ----- Basin Index (%) 187* 115 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.9 19.2 109 Divide Peak 8880 .0 .0 * 28.5 27.3 104 Elk River 8700 .0 .0 * 25.1 25.4 99 Little Snake River 8915 6.1 2.5 244* 45.7 36.1 127 Old Battle 10000 36.2 24.8 146 47.0 43.4 108 Sage Creek Basin 7850 -M .0 * 19.6 17.8 110 Sandstone RS 8150 .0 .0 * 20.2 23.2 87 Whiskey Park 8950 9.6 7.5 128 37.8 34.8 109 ----- ----- Basin Index (%) 149* 108 UPPER GREEN RIVER Big Sandy Opening 9080 5.6 .0 * 27.5 17.8 154 Blind Bull Sum 8650 -M 12.3 * 40.0 24.3 165 East Rim Divide 7930 .1 .0 * 23.7 15.0 158 Elkhart Park G.S. 9400 5.2 .2 2600* 27.7 17.8 156 Gros Ventre Summit 8750 -M .0 * -M 17.0 * Gunsight Pass 9820 16.3 3.4 479 30.1 18.6 162 Kendall R.S. 7740 .0 .0 * 31.8 17.6 181 Loomis Park 8240 5.7 .0 * 35.5 21.4 166 New Fork Lake 8340 -M .0 * 22.7 14.5 157 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 .0 .0 * 30.2 17.5 173 Spring Creek Divide 9000 29.8 12.3 242 46.5 29.1 160 Triple Peak 8500 14.3 .0 * 46.3 31.4 147 ----- ----- Basin Index (%) 484* 161 LOWER GREEN RIVER Blacks Fork Jct 8869 .1 -M * 19.8 -M * Buck Pasture 9632 .2 -M * 28.8 -M * EF Blacks Fork GS 9360 -M -M * 24.1 -M * Hams Fork 7840 .0 .0 * 25.0 15.2 164 Hewinta 9500 .0 .0 * 22.4 18.5 121 Hickerson Park 9122 .0 .0 * 16.3 14.3 114 Hole-in-Rock 9168 .0 .0 * 17.3 13.9 124 Indian Creek 9425 27.1 11.2 242 47.2 28.0 169 Kelley R.S. 8180 -M .0 * 35.7 22.7 157 Spirit Lk 10235 .0 -M * 22.4 -M * Steel Creek Park 10158 11.6 9.7 120 26.9 22.0 122 ----- ----- Basin Index (%) 185* 142 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 22.3 -M * Bug Lake 7987 7.1 .0 * 39.2 24.4 161 Burts Miller Ranch 8000 .0 -M * 12.4 -M * Chalk Creek #1 9171 12.4 6.7 185 42.4 31.9 133 Hayden Fork 9130 .0 .0 * 33.0 26.7 124 Kelley R.S. 8180 -M .0 * 35.7 22.7 157 Lily Lake 9133 .0 .0 * 24.0 22.3 108 Monte Cristo 8932 17.4 4.9 355 46.5 32.7 142 Salt River Summit 7760 .0 .0 * 32.8 20.8 158 ----- ----- Basin Index (%) 318* 140 ----------------------------------------------------------------------------- -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.