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 FRIDAY: MAY 5 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 18.2 7.2 253 42.2 23.2 182 Black Bear 8170 50.8 37.2 137 59.8 42.3 141 Blind Bull Sum 8650 48.4 22.7 213 39.0 21.7 180 Cottonwood Creek 7670 27.7 14.1 196 44.0 28.0 157 East Rim Divide 7930 6.9 7.4 93 22.5 13.1 172 Grand Targhee 9260 60.4 46.0 131 51.1 35.3 145 Granite Creek 6770 19.4 7.4 262 38.4 21.6 178 Grassy Lake 7265 39.2 27.6 142 61.5 39.8 155 Gros Ventre Summit 8750 20.1 10.8 186 26.5 14.9 178 Gunsight Pass 9820 26.4 11.8 224 28.2 16.3 173 Lewis Lake Divide 7850 47.1 29.5 160 59.9 39.1 153 Phillips Bench 8200 40.9 24.2 169 50.7 31.1 163 Salt River Summit 7760 15.9 7.1 224 31.9 18.6 172 Snake River Station 6920 11.7 5.1 229 39.2 25.1 156 Spring Creek Divide 9000 44.4 24.2 183 44.6 26.6 168 Thumb Divide 7980 17.8 10.3 173 30.5 21.3 143 Togwotee Pass 9580 36.7 24.8 148 43.1 27.8 155 Two Ocean Plateau 9240 -M 29.9 * -M 30.6 * Willow Creek 8380 28.8 21.8 132 57.6 38.3 150 Younts Peak 8350 20.5 15.7 131 33.7 18.0 187 ----- ----- Basin Index (%) 164 160 MADISON-GALLATIN Black Bear 8170 50.8 37.2 137 59.8 42.3 141 Canyon 7870 17.4 8.8 198 28.9 18.3 158 Madison Plateau 7750 29.5 20.8 142 40.0 29.4 136 West Yellowstone 6700 .0 .0 * 26.0 16.2 160 Whiskey Creek 6800 11.4 12.9 88 29.9 22.6 132 ----- ----- Basin Index (%) 137 143 YELLOWSTONE Beartooth Lake 9360 36.2 22.7 159 31.7 22.3 142 Burnt Mtn 5880 .0 .0 * 18.5 16.2 114 Canyon 7870 17.4 8.8 198 28.9 18.3 158 Cole Creek 7850 16.8 16.8 100 14.2 16.8 85 Evening Star 9200 41.6 24.9 167 49.3 30.9 160 Fisher Creek 9100 48.5 32.9 147 52.7 35.7 148 Northeast Entrance 7350 .0 1.2 0 23.0 14.0 164 Parker Peak 9400 43.1 21.3 202 40.1 20.4 197 Sylvan Lake 8420 26.1 18.7 140 42.0 25.5 165 Thumb Divide 7980 17.8 10.3 173 30.5 21.3 143 Two Ocean Plateau 9240 -M 29.9 * -M 30.6 * White Mill 8700 40.8 24.0 170 40.0 26.7 150 Wolverine 7650 .2 .8 25* 23.8 14.0 170 ----- ----- Basin Index (%) 158 151 WIND RIVER Burroughs Creek 8750 18.1 -M * 29.3 -M * Castle Creek 8400 5.0 -M * 17.3 -M * Cold Springs 9630 14.5 1.5 967 22.4 12.8 175 Deer Park 9700 36.2 15.1 240 43.4 23.8 182 Hobbs Park 10100 34.7 15.9 218 34.5 17.1 202 Kirwin 9550 24.9 10.7 233 29.3 14.2 206 Little Warm 9370 18.6 7.8 238 27.2 15.7 173 Owl Creek 8975 6.6 .6 1100 15.3 8.2 187 South Pass 9040 33.4 13.8 242 33.8 20.8 162 St. Lawrence Alt 8620 8.3 1.8 461 20.6 11.8 175 Togwotee Pass 9580 36.7 24.8 148 43.1 27.8 155 Townsend Creek 8700 18.9 6.2 305 28.2 15.2 186 ----- ----- Basin Index (%) 237 178 BIGHORN BASIN Bald Mtn. 9380 24.0 20.4 118 21.5 20.1 107 Bear Trap Meadow 8200 5.9 .3 1967* 14.9 11.0 135 Bone Springs Div 9350 23.8 16.4 145 21.7 18.6 117 Grave Springs 8550 11.1 9.1 122 13.7 13.1 105 Kirwin 9550 24.9 10.7 233 29.3 14.2 206 Marquette 8760 20.1 -M * 23.9 -M * Middle Powder 7760 13.2 11.3 117 14.2 14.5 98 Owl Creek 8975 6.6 .6 1100 15.3 8.2 187 Powder River Pass 9480 11.3 9.1 124 18.2 15.4 118 Shell Creek 9580 20.1 16.2 124 18.4 16.7 110 Timber Creek 7950 6.6 2.3 287 15.1 10.3 147 ----- ----- Basin Index (%) 153 128 SHOSHONE RIVER Blackwater 9780 42.0 25.8 163 46.4 23.9 194 Evening Star 9200 41.6 24.9 167 49.3 30.9 160 Marquette 8760 20.1 -M * 23.9 -M * Sylvan Road 7120 .0 3.7 0 32.4 18.9 171 Younts Peak 8350 20.5 15.7 131 33.7 18.0 187 ----- ----- Basin Index (%) 149 176 POWDER RIVER Bear Trap Meadow 8200 5.9 .3 1967* 14.9 11.0 135 Cloud Peak Reservoir 9860 20.9 16.4 127 26.4 17.1 154 Grave Springs 8550 11.1 9.1 122 13.7 13.1 105 Hansen Sawmill 8360 14.8 1.7 871 18.9 11.1 170 Middle Powder 7760 13.2 11.3 117 14.2 14.5 98 Powder River Pass 9480 11.3 9.1 124 18.2 15.4 118 Soldier Park 8720 17.3 -M * 20.5 -M * ----- ----- Basin Index (%) 161 129 TONGUE RIVER Big Goose 7990 14.8 9.6 154 20.1 14.5 139 Bone Springs Div 9350 23.8 16.4 145 21.7 18.6 117 Burgess Junction 7880 13.1 11.7 112 15.9 15.1 105 Dome Lake 8880 19.5 11.3 173 22.0 16.8 131 Little Goose 8870 18.7 -M * 24.0 -M * Sucker Creek 8880 15.8 12.0 132 19.0 17.8 107 Tie Creek 6870 3.5 2.4 146 19.7 14.8 133 ----- ----- Basin Index (%) 143 121 BELLE FOURCHE Cole Canyon 5910 .6 .0 * 12.1 12.4 98 ----- ----- Basin Index (%) * 98 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 11.7 14.7 80 North Rapid Creek 6130 .0 .0 * 10.0 12.6 79 ----- ----- Basin Index (%) * 79 UPPER N. PLATTE Arapaho Ridge 10960 26.2 22.2 118 29.9 26.8 112 Blackhall Mtn 9820 37.0 -M * 42.2 -M * Columbine 9160 11.9 16.5 72 32.1 29.1 110 Divide Peak 8880 11.4 17.1 67 26.1 24.8 105 Joe Wright 10120 19.3 22.8 85 33.4 30.6 109 Laprele Creek 8375 5.0 5.2 96 15.2 15.4 99 Med Bow 10500 39.5 -M * 41.3 -M * North French Creek 10130 28.5 32.7 87 34.0 31.3 109 Never Summer 10280 25.0 21.9 114 22.7 -M * Old Battle 10000 40.4 35.0 115 43.2 39.8 109 Rawah 9020 4.9 4.4 111 20.7 17.7 117 Sage Creek Basin 7850 -M .6 * 18.0 16.5 109 Sand Lake 10050 33.7 31.6 107 32.3 29.6 109 South Brush Creek 8440 .4 7.5 5 15.9 18.3 87 Tower 10500 44.5 51.0 87 51.0 45.5 112 Webber Springs 9250 23.3 20.8 112 37.0 30.4 122 Willow Creek Pass 9540 19.0 14.5 131 20.5 16.1 127 Zirkel 9340 24.6 20.6 119 46.8 31.5 149 ----- ----- Basin Index (%) 98 113 SWEETWATER Deer Park 9700 36.2 15.1 240 43.4 23.8 182 Larsen Creek 9000 10.6 8.0 132 26.0 -M * South Pass 9040 33.4 13.8 242 33.8 20.8 162 ----- ----- Basin Index (%) 217 173 LOWER N. PLATTE Casper Mtn. 7900 12.6 12.2 103 18.7 18.5 101 Laprele Creek 8375 5.0 5.2 96 15.2 15.4 99 Reno Hill 8400 13.0 12.0 108 18.8 19.4 97 Windy Peak 7900 2.7 2.8 96 14.1 13.3 106 ----- ----- Basin Index (%) 103 100 LARAMIE RIVER Brooklyn Lake 10240 21.2 22.8 93 26.8 25.2 106 Cinnabar Park 9574 14.1 18.5 76 26.8 27.5 97 Crow Creek 8330 .0 .0 * 12.3 13.8 89 Deadman Hill 10220 22.4 19.1 117 24.9 21.1 118 Rawah 9020 4.9 4.4 111 20.7 17.7 117 Roach 9700 16.5 17.0 97 25.3 22.8 111 ----- ----- Basin Index (%) 97 107 S. PLATTE Black Mountain 8920 7.7 -M * 16.4 -M * Crow Creek 8330 .0 .0 * 12.3 13.8 89 Deadman Hill 10220 22.4 19.1 117 24.9 21.1 118 ----- ----- Basin Index (%) 117* 107 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 19.4 17.4 111 Divide Peak 8880 11.4 17.1 67 26.1 24.8 105 Elk River 8700 3.9 11.3 35 23.2 23.2 100 Little Snake River 8915 22.7 21.4 106 43.5 33.3 131 Old Battle 10000 40.4 35.0 115 43.2 39.8 109 Sage Creek Basin 7850 -M .6 * 18.0 16.5 109 Sandstone RS 8150 -M 4.1 * 19.2 21.1 91 Whiskey Park 8950 24.5 27.0 91 35.2 32.1 110 ----- ----- Basin Index (%) 92 109 UPPER GREEN RIVER Big Sandy Opening 9080 21.7 9.0 241 25.7 15.5 166 Blind Bull Sum 8650 48.4 22.7 213 39.0 21.7 180 East Rim Divide 7930 6.9 7.4 93 22.5 13.1 172 Elkhart Park G.S. 9400 20.5 10.3 199 26.3 15.3 172 Gros Ventre Summit 8750 20.1 10.8 186 26.5 14.9 178 Gunsight Pass 9820 26.4 11.8 224 28.2 16.3 173 Kendall R.S. 7740 11.9 2.0 595 30.6 15.7 195 Loomis Park 8240 22.0 9.5 232 34.5 19.2 180 New Fork Lake 8340 10.1 5.0 202 19.7 12.4 159 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 12.6 8.2 154 29.2 15.8 185 Spring Creek Divide 9000 44.4 24.2 183 44.6 26.6 168 Triple Peak 8500 36.2 15.9 228 44.9 28.3 159 ----- ----- Basin Index (%) 206 173 LOWER GREEN RIVER Blacks Fork Jct 8869 3.4 -M * 18.7 -M * Buck Pasture 9632 15.8 -M * 27.3 -M * EF Blacks Fork GS 9360 11.6 -M * 21.6 -M * Hams Fork 7840 7.0 1.1 636 23.9 13.3 180 Hewinta 9500 6.2 4.0 155 20.9 16.6 126 Hickerson Park 9122 1.5 2.7 56 14.9 12.3 121 Hole-in-Rock 9168 2.1 1.5 140 15.7 11.9 132 Indian Creek 9425 43.6 21.8 200 45.1 25.4 178 Kelley R.S. 8180 -M 10.0 * 33.7 20.5 164 Spirit Lk 10235 15.2 -M * 20.9 -M * Steel Creek Park 10158 22.1 17.5 126 25.3 19.6 129 ----- ----- Basin Index (%) 170 150 UPPER BEAR RIVER Bear River RS 8777 .1 -M * 21.3 -M * Bug Lake 7987 32.6 13.4 243 37.6 22.1 170 Burts Miller Ranch 8000 .0 -M * 11.9 -M * Chalk Creek #1 9171 34.5 23.2 149 41.1 29.1 141 Hayden Fork 9130 13.0 8.1 160 33.3 24.3 137 Kelley R.S. 8180 -M 10.0 * 33.7 20.5 164 Lily Lake 9133 11.6 9.2 126 23.0 20.0 115 Monte Cristo 8932 38.9 24.6 158 44.6 29.9 149 Salt River Summit 7760 15.9 7.1 224 31.9 18.6 172 ----- ----- Basin Index (%) 171 149 ----------------------------------------------------------------------------- -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.