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 12 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.5 14.4 170 40.0 21.1 190 Black Bear 8170 47.5 36.7 129 54.5 38.5 142 Blind Bull Sum 8650 44.0 23.6 186 -M 19.6 * Cottonwood Creek 7670 28.5 20.5 139 39.1 24.9 157 East Rim Divide 7930 15.7 10.1 155 21.3 11.8 181 Grand Targhee 9260 47.3 40.0 118 39.8 31.3 127 Granite Creek 6770 25.8 13.3 194 36.3 19.7 184 Grassy Lake 7265 37.5 31.4 119 55.6 36.2 154 Gros Ventre Summit 8750 -M 12.8 * -M 13.1 * Gunsight Pass 9820 23.9 13.7 174 25.7 14.1 182 Lewis Lake Divide 7850 46.7 30.2 155 56.0 35.7 157 Phillips Bench 8200 39.0 25.9 151 47.2 28.4 166 Salt River Summit 7760 20.0 12.1 165 -M 16.8 * Snake River Station 6920 18.4 13.9 132 36.2 22.7 159 Spring Creek Divide 9000 41.9 22.9 183 41.2 24.0 172 Thumb Divide 7980 22.9 14.6 157 28.3 18.8 151 Togwotee Pass 9580 34.2 22.7 151 39.3 24.6 160 Two Ocean Plateau 9240 -M 26.7 * -M 27.5 * Willow Creek 8380 28.8 27.5 105 50.7 34.0 149 Younts Peak 8350 26.5 14.5 183 31.7 16.0 198 ----- ----- Basin Index (%) 148 160 MADISON-GALLATIN Black Bear 8170 47.5 36.7 129 54.5 38.5 142 Canyon 7870 18.0 12.3 146 26.1 16.4 159 Madison Plateau 7750 27.7 22.2 125 36.7 26.5 138 West Yellowstone 6700 5.9 8.6 69 23.5 14.2 165 Whiskey Creek 6800 13.4 14.6 92 27.2 20.3 134 ----- ----- Basin Index (%) 119 145 YELLOWSTONE Beartooth Lake 9360 33.3 21.8 153 28.4 20.0 142 Burnt Mtn 5880 .2 2.4 8 15.0 13.3 113 Canyon 7870 18.0 12.3 146 26.1 16.4 159 Cole Creek 7850 12.5 15.3 82 9.5 13.5 70 Evening Star 9200 38.8 24.2 160 45.4 27.7 164 Fisher Creek 9100 43.9 31.6 139 47.7 32.0 149 Northeast Entrance 7350 7.6 8.5 89 20.9 12.4 169 Parker Peak 9400 36.3 20.1 181 35.1 17.9 196 Sylvan Lake 8420 24.7 19.8 125 37.9 22.6 168 Thumb Divide 7980 22.9 14.6 157 28.3 18.8 151 Two Ocean Plateau 9240 -M 26.7 * -M 27.5 * White Mill 8700 37.2 23.1 161 36.5 24.0 152 Wolverine 7650 4.3 9.2 47 21.3 12.3 173 ----- ----- Basin Index (%) 138 152 WIND RIVER Burroughs Creek 8750 23.2 -M * 27.8 -M * Castle Creek 8400 10.8 -M * 16.0 -M * Cold Springs 9630 17.8 6.1 292 20.3 10.3 197 Deer Park 9700 33.6 16.2 207 38.5 20.5 188 Hobbs Park 10100 30.4 14.8 205 28.8 14.0 206 Kirwin 9550 23.6 9.8 241 25.8 11.8 219 Little Warm 9370 19.4 10.3 188 25.3 13.1 193 Owl Creek 8975 10.6 5.6 189 13.5 6.3 214 South Pass 9040 32.1 15.8 203 29.0 17.8 163 St. Lawrence Alt 8620 10.2 6.8 150 17.6 9.3 189 Togwotee Pass 9580 34.2 22.7 151 39.3 24.6 160 Townsend Creek 8700 18.8 10.0 188 23.6 12.6 187 ----- ----- Basin Index (%) 195 187 BIGHORN BASIN Bald Mtn. 9380 20.7 19.3 107 17.7 17.4 102 Bear Trap Meadow 8200 5.7 4.6 124 9.6 8.8 109 Bone Springs Div 9350 20.8 17.0 122 18.6 15.9 117 Grave Springs 8550 7.8 9.6 81 8.8 11.0 80 Kirwin 9550 23.6 9.8 241 25.8 11.8 219 Marquette 8760 14.7 -M * 18.2 -M * Middle Powder 7760 9.0 12.4 73 8.6 12.1 71 Owl Creek 8975 10.6 5.6 189 13.5 6.3 214 Powder River Pass 9480 9.7 10.3 94 14.2 13.0 109 Shell Creek 9580 18.8 15.6 121 15.6 14.1 111 Timber Creek 7950 8.1 5.1 159 11.9 7.6 157 ----- ----- Basin Index (%) 123 122 SHOSHONE RIVER Blackwater 9780 38.5 23.3 165 42.6 20.9 204 Evening Star 9200 38.8 24.2 160 45.4 27.7 164 Marquette 8760 14.7 -M * 18.2 -M * Sylvan Road 7120 5.7 10.4 55 30.9 16.9 183 Younts Peak 8350 26.5 14.5 183 31.7 16.0 198 ----- ----- Basin Index (%) 151 185 POWDER RIVER Bear Trap Meadow 8200 5.7 4.6 124 9.6 8.8 109 Cloud Peak Reservoir 9860 18.3 15.3 120 19.9 13.8 144 Grave Springs 8550 7.8 9.6 81 8.8 11.0 80 Hansen Sawmill 8360 12.5 6.1 205 15.6 8.9 175 Middle Powder 7760 9.0 12.4 73 8.6 12.1 71 Powder River Pass 9480 9.7 10.3 94 14.2 13.0 109 Soldier Park 8720 16.5 -M * 15.7 -M * ----- ----- Basin Index (%) 108 113 TONGUE RIVER Big Goose 7990 12.6 9.9 127 15.1 12.0 126 Bone Springs Div 9350 20.8 17.0 122 18.6 15.9 117 Burgess Junction 7880 11.5 12.2 94 12.9 12.8 101 Dome Lake 8880 17.2 11.9 145 17.6 14.1 125 Little Goose 8870 15.3 -M * 18.7 -M * Sucker Creek 8880 14.3 12.5 114 15.0 14.9 101 Tie Creek 6870 3.7 5.2 71 14.5 12.1 120 ----- ----- Basin Index (%) 117 115 BELLE FOURCHE Cole Canyon 5910 .0 4.1 0 7.7 9.8 79 ----- ----- Basin Index (%) 0 79 CHEYENNE RIVER BASIN Blind Park 6890 .0 6.2 0 9.7 12.3 79 North Rapid Creek 6130 .0 6.0 0 8.2 10.3 80 ----- ----- Basin Index (%) 0 79 UPPER N. PLATTE Arapaho Ridge 10960 25.4 21.4 119 26.4 23.4 113 Blackhall Mtn 9820 36.4 -M * 38.2 -M * Columbine 9160 17.4 22.8 76 27.7 26.0 107 Divide Peak 8880 15.8 20.3 78 23.3 21.9 106 Joe Wright 10120 18.5 21.9 84 28.8 26.5 109 Laprele Creek 8375 10.1 9.4 107 12.7 12.9 98 Med Bow 10500 39.2 -M * 35.8 -M * North French Creek 10130 25.1 31.0 81 27.9 27.4 102 Never Summer 10280 21.8 20.5 106 19.6 -M * Old Battle 10000 36.8 32.0 115 38.8 35.6 109 Rawah 9020 8.3 10.2 81 17.5 14.9 117 Sage Creek Basin 7850 4.6 10.3 45 16.9 14.9 113 Sand Lake 10050 31.1 30.0 104 28.2 25.5 111 South Brush Creek 8440 2.1 11.5 18 12.9 15.7 82 Tower 10500 39.3 47.1 83 44.2 40.5 109 Webber Springs 9250 25.9 23.4 111 33.9 27.3 124 Willow Creek Pass 9540 18.2 12.5 146 18.7 13.8 136 Zirkel 9340 30.9 25.1 123 42.5 29.1 146 ----- ----- Basin Index (%) 95 113 SWEETWATER Deer Park 9700 33.6 16.2 207 38.5 20.5 188 Larsen Creek 9000 16.4 11.1 148 23.6 -M * South Pass 9040 32.1 15.8 203 29.0 17.8 163 ----- ----- Basin Index (%) 190 176 LOWER N. PLATTE Casper Mtn. 7900 11.7 14.5 81 13.7 15.6 88 Laprele Creek 8375 10.1 9.4 107 12.7 12.9 98 Reno Hill 8400 13.1 14.2 92 15.3 16.1 95 Windy Peak 7900 7.6 7.5 101 11.9 10.9 109 ----- ----- Basin Index (%) 93 97 LARAMIE RIVER Brooklyn Lake 10240 23.0 22.3 103 23.6 21.7 109 Cinnabar Park 9574 16.7 21.4 78 22.6 24.8 91 Crow Creek 8330 .0 5.9 0 9.3 11.3 82 Deadman Hill 10220 21.4 16.6 129 20.9 17.9 117 Rawah 9020 8.3 10.2 81 17.5 14.9 117 Roach 9700 16.6 16.5 101 21.6 19.7 110 ----- ----- Basin Index (%) 93 105 S. PLATTE Black Mountain 8920 10.7 -M * 13.3 -M * Crow Creek 8330 .0 5.9 0 9.3 11.3 82 Deadman Hill 10220 21.4 16.6 129 20.9 17.9 117 ----- ----- Basin Index (%) 95 103 LITTLE SNAKE RIVER Battle Mountain 7440 -M 8.0 * 17.0 15.3 111 Divide Peak 8880 15.8 20.3 78 23.3 21.9 106 Elk River 8700 11.6 18.2 64 20.7 20.5 101 Little Snake River 8915 26.2 26.0 101 39.2 30.6 128 Old Battle 10000 36.8 32.0 115 38.8 35.6 109 Sage Creek Basin 7850 4.6 10.3 45 16.9 14.9 113 Sandstone RS 8150 5.5 12.5 44 16.4 18.7 88 Whiskey Park 8950 25.3 27.6 92 30.6 28.4 108 ----- ----- Basin Index (%) 86 109 UPPER GREEN RIVER Big Sandy Opening 9080 21.7 12.9 168 23.5 13.5 174 Blind Bull Sum 8650 44.0 23.6 186 -M 19.6 * East Rim Divide 7930 15.7 10.1 155 21.3 11.8 181 Elkhart Park G.S. 9400 20.0 12.3 163 24.7 13.5 183 Gros Ventre Summit 8750 -M 12.8 * -M 13.1 * Gunsight Pass 9820 23.9 13.7 174 25.7 14.1 182 Kendall R.S. 7740 19.6 10.7 183 29.6 14.3 207 Loomis Park 8240 27.0 13.7 197 32.6 17.4 187 New Fork Lake 8340 15.5 9.9 157 18.1 10.9 166 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.7 12.2 153 27.9 14.3 195 Spring Creek Divide 9000 41.9 22.9 183 41.2 24.0 172 Triple Peak 8500 36.7 20.7 177 41.5 25.5 163 ----- ----- Basin Index (%) 175 180 LOWER GREEN RIVER Blacks Fork Jct 8869 9.0 -M * 16.5 -M * Buck Pasture 9632 17.9 -M * 24.1 -M * EF Blacks Fork GS 9360 14.9 -M * 17.9 -M * Hams Fork 7840 14.2 9.5 149 22.0 11.5 191 Hewinta 9500 9.9 10.5 94 18.0 14.4 125 Hickerson Park 9122 8.8 7.5 117 13.5 10.6 127 Hole-in-Rock 9168 7.7 7.1 108 14.0 10.1 139 Indian Creek 9425 41.5 24.6 169 41.8 22.8 183 Kelley R.S. 8180 26.0 14.2 183 31.2 18.3 170 Spirit Lk 10235 16.9 -M * 19.2 -M * Steel Creek Park 10158 19.8 16.1 123 21.7 17.0 128 ----- ----- Basin Index (%) 143 155 UPPER BEAR RIVER Bear River RS 8777 8.6 -M * 19.1 -M * Bug Lake 7987 33.1 19.1 173 34.8 19.7 177 Burts Miller Ranch 8000 2.2 -M * 10.6 -M * Chalk Creek #1 9171 34.2 24.7 138 37.1 25.8 144 Hayden Fork 9130 20.2 14.7 137 30.4 21.5 141 Kelley R.S. 8180 26.0 14.2 183 31.2 18.3 170 Lily Lake 9133 14.1 12.7 111 20.5 17.6 116 Monte Cristo 8932 37.3 27.8 134 40.5 26.5 153 Salt River Summit 7760 20.0 12.1 165 -M 16.8 * ----- ----- Basin Index (%) 148 150 ----------------------------------------------------------------------------- -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.