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: APRIL 26 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 20.6 10.6 194 41.4 22.2 186 Black Bear 8170 50.1 37.0 135 58.0 40.9 142 Blind Bull Sum 8650 45.8 24.2 189 38.0 20.8 183 Cottonwood Creek 7670 28.2 17.0 166 41.7 26.6 157 East Rim Divide 7930 10.6 8.9 119 22.1 12.5 177 Grand Targhee 9260 54.8 43.3 127 48.2 33.5 144 Granite Creek 6770 21.8 9.3 234 37.4 20.7 181 Grassy Lake 7265 37.6 30.1 125 58.9 38.4 153 Gros Ventre Summit 8750 20.9 12.3 170 25.5 14.1 181 Gunsight Pass 9820 -M 13.4 * 27.0 15.5 174 Lewis Lake Divide 7850 47.1 30.7 153 58.3 37.7 155 Phillips Bench 8200 40.2 25.5 158 49.2 29.9 165 Salt River Summit 7760 17.2 8.4 205 -M 17.9 * Snake River Station 6920 13.6 9.8 139 38.1 24.2 157 Spring Creek Divide 9000 43.0 23.9 180 42.7 25.5 167 Thumb Divide 7980 19.5 14.1 138 29.5 20.3 145 Togwotee Pass 9580 35.5 24.5 145 41.4 26.5 156 Two Ocean Plateau 9240 -M 29.2 * -M 29.3 * Willow Creek 8380 28.4 25.3 112 55.0 36.5 151 Younts Peak 8350 24.2 15.1 160 32.8 17.1 192 ----- ----- Basin Index (%) 151 161 MADISON-GALLATIN Black Bear 8170 50.1 37.0 135 58.0 40.9 142 Canyon 7870 18.1 11.6 156 27.8 17.5 159 Madison Plateau 7750 29.2 22.4 130 39.3 28.2 139 West Yellowstone 6700 .7 4.7 15 25.6 15.5 165 Whiskey Creek 6800 12.6 15.4 82 29.1 21.8 133 ----- ----- Basin Index (%) 122 145 YELLOWSTONE Beartooth Lake 9360 35.2 23.5 150 30.2 21.3 142 Burnt Mtn 5880 .0 .0 * 16.5 14.9 111 Canyon 7870 18.1 11.6 156 27.8 17.5 159 Cole Creek 7850 13.7 16.3 84 11.1 15.5 72 Evening Star 9200 40.3 24.6 164 47.6 29.6 161 Fisher Creek 9100 46.7 33.2 141 51.1 34.3 149 Northeast Entrance 7350 3.3 4.9 67 22.3 13.4 166 Parker Peak 9400 40.8 21.8 187 38.4 19.4 198 Sylvan Lake 8420 25.8 20.3 127 40.6 24.3 167 Thumb Divide 7980 19.5 14.1 138 29.5 20.3 145 Two Ocean Plateau 9240 -M 29.2 * -M 29.3 * White Mill 8700 40.0 23.8 168 38.8 25.6 152 Wolverine 7650 3.0 5.2 58 22.7 13.3 171 ----- ----- Basin Index (%) 144 151 WIND RIVER Burroughs Creek 8750 19.9 -M * 28.4 -M * Castle Creek 8400 8.0 -M * 17.1 -M * Cold Springs 9630 15.2 2.7 563 20.8 11.7 178 Deer Park 9700 34.7 16.3 213 41.2 22.8 181 Hobbs Park 10100 32.1 15.7 204 31.3 15.9 197 Kirwin 9550 24.3 10.2 238 27.4 13.1 209 Little Warm 9370 18.8 9.4 200 25.9 14.6 177 Owl Creek 8975 8.2 2.3 357 14.4 7.4 195 South Pass 9040 31.8 15.2 209 30.8 19.6 157 St. Lawrence Alt 8620 7.7 4.6 167 18.9 10.9 173 Togwotee Pass 9580 35.5 24.5 145 41.4 26.5 156 Townsend Creek 8700 17.5 8.7 201 25.2 14.3 176 ----- ----- Basin Index (%) 206 177 BIGHORN BASIN Bald Mtn. 9380 22.4 20.5 109 19.5 18.9 103 Bear Trap Meadow 8200 6.5 1.7 382 13.7 10.0 137 Bone Springs Div 9350 22.4 16.4 137 20.0 17.4 115 Grave Springs 8550 10.1 9.2 110 11.9 12.3 97 Kirwin 9550 24.3 10.2 238 27.4 13.1 209 Marquette 8760 16.7 -M * 20.7 -M * Middle Powder 7760 12.4 12.2 102 13.1 13.5 97 Owl Creek 8975 8.2 2.3 357 14.4 7.4 195 Powder River Pass 9480 10.6 10.1 105 16.2 14.3 113 Shell Creek 9580 19.5 15.9 123 17.1 15.5 110 Timber Creek 7950 6.9 3.6 192 13.3 9.2 145 ----- ----- Basin Index (%) 140 127 SHOSHONE RIVER Blackwater 9780 40.7 24.6 165 45.0 22.7 198 Evening Star 9200 40.3 24.6 164 47.6 29.6 161 Marquette 8760 16.7 -M * 20.7 -M * Sylvan Road 7120 .0 7.9 0 31.9 18.0 177 Younts Peak 8350 24.2 15.1 160 32.8 17.1 192 ----- ----- Basin Index (%) 146 180 POWDER RIVER Bear Trap Meadow 8200 6.5 1.7 382 13.7 10.0 137 Cloud Peak Reservoir 9860 19.8 16.4 121 24.1 15.8 153 Grave Springs 8550 10.1 9.2 110 11.9 12.3 97 Hansen Sawmill 8360 14.0 4.1 341 18.9 10.3 183 Middle Powder 7760 12.4 12.2 102 13.1 13.5 97 Powder River Pass 9480 10.6 10.1 105 16.2 14.3 113 Soldier Park 8720 16.5 -M * 18.4 -M * ----- ----- Basin Index (%) 137 128 TONGUE RIVER Big Goose 7990 13.4 9.1 147 17.6 13.5 130 Bone Springs Div 9350 22.4 16.4 137 20.0 17.4 115 Burgess Junction 7880 12.0 12.4 97 14.0 14.1 99 Dome Lake 8880 17.9 11.8 152 19.9 15.6 128 Little Goose 8870 16.8 -M * 21.7 -M * Sucker Creek 8880 14.5 12.6 115 16.6 16.6 100 Tie Creek 6870 2.2 3.2 69 17.1 13.6 126 ----- ----- Basin Index (%) 126 116 BELLE FOURCHE Cole Canyon 5910 1.5 .6 250 10.9 11.0 99 ----- ----- Basin Index (%) 250 99 CHEYENNE RIVER BASIN Blind Park 6890 .2 3.2 6 10.7 13.7 78 North Rapid Creek 6130 .2 3.1 6 9.3 11.7 79 ----- ----- Basin Index (%) 6 79 UPPER N. PLATTE Arapaho Ridge 10960 25.1 21.9 115 28.3 25.6 111 Blackhall Mtn 9820 35.2 -M * 40.1 -M * Columbine 9160 11.1 20.3 55 29.7 27.8 107 Divide Peak 8880 10.6 18.0 59 24.3 23.7 103 Joe Wright 10120 17.6 23.4 75 31.5 29.0 109 Laprele Creek 8375 6.1 7.2 85 13.9 14.5 96 Med Bow 10500 37.4 -M * 38.3 -M * North French Creek 10130 25.8 32.8 79 30.8 29.8 103 Never Summer 10280 24.0 21.3 113 21.6 -M * Old Battle 10000 38.0 34.3 111 40.7 38.2 107 Rawah 9020 5.3 8.0 66 19.5 16.7 117 Sage Creek Basin 7850 -M 2.2 * 17.5 15.7 111 Sand Lake 10050 31.4 31.1 101 30.1 28.1 107 South Brush Creek 8440 .3 10.0 3 14.3 17.2 83 Tower 10500 42.1 49.5 85 47.6 43.6 109 Webber Springs 9250 21.9 21.9 100 35.3 29.2 121 Willow Creek Pass 9540 18.4 13.8 133 19.8 15.2 130 Zirkel 9340 23.2 22.1 105 44.7 30.4 147 ----- ----- Basin Index (%) 90 111 SWEETWATER Deer Park 9700 34.7 16.3 213 41.2 22.8 181 Larsen Creek 9000 12.9 9.7 133 25.3 -M * South Pass 9040 31.8 15.2 209 30.8 19.6 157 ----- ----- Basin Index (%) 193 170 LOWER N. PLATTE Casper Mtn. 7900 11.1 14.2 78 16.6 17.3 96 Laprele Creek 8375 6.1 7.2 85 13.9 14.5 96 Reno Hill 8400 12.3 13.7 90 17.0 18.1 94 Windy Peak 7900 3.8 5.8 66 13.0 12.5 104 ----- ----- Basin Index (%) 81 97 LARAMIE RIVER Brooklyn Lake 10240 19.9 22.9 87 24.6 23.9 103 Cinnabar Park 9574 12.7 20.0 64 24.3 26.3 92 Crow Creek 8330 .0 .0 * 11.4 12.9 88 Deadman Hill 10220 20.7 18.3 113 23.0 20.0 115 Rawah 9020 5.3 8.0 66 19.5 16.7 117 Roach 9700 15.0 16.9 89 23.2 21.6 107 ----- ----- Basin Index (%) 85 104 S. PLATTE Black Mountain 8920 7.7 -M * 14.9 -M * Crow Creek 8330 .0 .0 * 11.4 12.9 88 Deadman Hill 10220 20.7 18.3 113 23.0 20.0 115 ----- ----- Basin Index (%) 113* 105 LITTLE SNAKE RIVER Battle Mountain 7440 .0 1.6 0 18.9 16.7 113 Divide Peak 8880 10.6 18.0 59 24.3 23.7 103 Elk River 8700 5.0 14.4 35 22.3 22.1 101 Little Snake River 8915 21.8 23.2 94 41.4 31.8 130 Old Battle 10000 38.0 34.3 111 40.7 38.2 107 Sage Creek Basin 7850 -M 2.2 * 17.5 15.7 111 Sandstone RS 8150 -M 8.2 * 17.6 20.2 87 Whiskey Park 8950 22.8 25.6 89 33.1 30.7 108 ----- ----- Basin Index (%) 84 108 UPPER GREEN RIVER Big Sandy Opening 9080 22.6 12.0 188 25.3 14.7 172 Blind Bull Sum 8650 45.8 24.2 189 38.0 20.8 183 East Rim Divide 7930 10.6 8.9 119 22.1 12.5 177 Elkhart Park G.S. 9400 20.5 11.8 174 25.8 14.5 178 Gros Ventre Summit 8750 20.9 12.3 170 25.5 14.1 181 Gunsight Pass 9820 -M 13.4 * 27.0 15.5 174 Kendall R.S. 7740 15.3 6.3 243 30.2 15.0 201 Loomis Park 8240 24.0 11.6 207 33.6 18.4 183 New Fork Lake 8340 12.6 7.2 175 19.1 11.6 165 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 16.2 10.0 162 28.4 15.2 187 Spring Creek Divide 9000 43.0 23.9 180 42.7 25.5 167 Triple Peak 8500 35.5 18.9 188 43.2 27.1 159 ----- ----- Basin Index (%) 182 176 LOWER GREEN RIVER Blacks Fork Jct 8869 4.8 -M * 18.0 -M * Buck Pasture 9632 15.7 -M * 26.0 -M * EF Blacks Fork GS 9360 11.7 -M * 20.0 -M * Hams Fork 7840 9.6 4.6 209 23.1 12.6 183 Hewinta 9500 6.6 6.5 102 19.8 15.6 127 Hickerson Park 9122 4.4 5.1 86 14.2 11.6 122 Hole-in-Rock 9168 4.7 4.6 102 15.0 11.1 135 Indian Creek 9425 42.1 23.8 177 43.6 24.3 179 Kelley R.S. 8180 23.7 11.8 201 32.7 19.6 167 Spirit Lk 10235 14.7 -M * 20.1 -M * Steel Creek Park 10158 21.3 16.6 128 23.9 18.5 129 ----- ----- Basin Index (%) 154 152 UPPER BEAR RIVER Bear River RS 8777 1.5 -M * 20.5 -M * Bug Lake 7987 31.9 16.2 197 36.2 21.1 172 Burts Miller Ranch 8000 .0 -M * 11.5 -M * Chalk Creek #1 9171 33.0 24.7 134 39.6 27.7 143 Hayden Fork 9130 14.5 10.4 139 32.6 23.1 141 Kelley R.S. 8180 23.7 11.8 201 32.7 19.6 167 Lily Lake 9133 12.0 9.8 122 22.2 19.0 117 Monte Cristo 8932 37.2 27.3 136 43.0 28.4 151 Salt River Summit 7760 17.2 8.4 205 -M 17.9 * ----- ----- Basin Index (%) 156 149 ----------------------------------------------------------------------------- -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.