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 SATURDAY: APRIL 29 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 21.1 10.0 211 42.1 22.6 186 Black Bear 8170 51.9 37.3 139 59.7 41.4 144 Blind Bull Sum 8650 -M 23.7 * 38.7 21.1 183 Cottonwood Creek 7670 30.0 16.0 188 43.5 27.1 161 East Rim Divide 7930 11.1 8.4 132 22.4 12.7 176 Grand Targhee 9260 57.6 44.1 131 50.9 34.1 149 Granite Creek 6770 22.3 8.6 259 38.1 21.1 181 Grassy Lake 7265 39.5 29.7 133 61.1 38.9 157 Gros Ventre Summit 8750 21.7 11.8 184 26.4 14.4 183 Gunsight Pass 9820 -M 13.0 * 28.1 15.9 177 Lewis Lake Divide 7850 48.3 30.4 159 59.4 38.2 155 Phillips Bench 8200 41.7 25.6 163 50.5 30.3 167 Salt River Summit 7760 18.0 8.1 222 -M 18.2 * Snake River Station 6920 14.4 8.4 171 39.0 24.5 159 Spring Creek Divide 9000 44.4 24.3 183 43.8 25.9 169 Thumb Divide 7980 20.4 13.3 153 30.5 20.7 147 Togwotee Pass 9580 36.9 24.7 149 42.7 27.0 158 Two Ocean Plateau 9240 -M 29.6 * -M 29.8 * Willow Creek 8380 29.4 24.1 122 57.2 37.1 154 Younts Peak 8350 24.1 15.3 158 33.0 17.4 190 ----- ----- Basin Index (%) 157 163 MADISON-GALLATIN Black Bear 8170 51.9 37.3 139 59.7 41.4 144 Canyon 7870 18.8 11.0 171 28.6 17.8 161 Madison Plateau 7750 29.8 21.9 136 40.0 28.7 139 West Yellowstone 6700 .7 3.1 23 26.0 15.8 165 Whiskey Creek 6800 12.7 15.1 84 29.6 22.1 134 ----- ----- Basin Index (%) 129 146 YELLOWSTONE Beartooth Lake 9360 35.8 23.1 155 30.8 21.7 142 Burnt Mtn 5880 1.1 .0 * 18.4 15.4 119 Canyon 7870 18.8 11.0 171 28.6 17.8 161 Cole Creek 7850 17.1 16.4 104 14.0 16.0 88 Evening Star 9200 41.2 24.8 166 48.6 30.1 161 Fisher Creek 9100 47.5 33.0 144 51.7 34.8 149 Northeast Entrance 7350 3.2 4.0 80 22.7 13.6 167 Parker Peak 9400 42.3 21.5 197 39.4 19.8 199 Sylvan Lake 8420 27.0 20.2 134 41.8 24.7 169 Thumb Divide 7980 20.4 13.3 153 30.5 20.7 147 Two Ocean Plateau 9240 -M 29.6 * -M 29.8 * White Mill 8700 40.4 23.8 170 39.2 26.0 151 Wolverine 7650 3.1 3.6 86 23.4 13.6 172 ----- ----- Basin Index (%) 153 153 WIND RIVER Burroughs Creek 8750 20.5 -M * 28.8 -M * Castle Creek 8400 8.0 -M * 17.3 -M * Cold Springs 9630 16.2 1.7 953 21.9 12.1 181 Deer Park 9700 37.2 16.2 230 41.9 23.1 181 Hobbs Park 10100 34.8 15.9 219 31.6 16.4 193 Kirwin 9550 26.0 10.3 252 28.7 13.5 213 Little Warm 9370 19.3 9.0 214 26.7 15.1 177 Owl Creek 8975 9.2 1.4 657 15.2 7.7 197 South Pass 9040 34.3 15.1 227 33.2 20.1 165 St. Lawrence Alt 8620 -M 3.4 * 20.6 11.3 182 Togwotee Pass 9580 36.9 24.7 149 42.7 27.0 158 Townsend Creek 8700 20.0 8.0 250 27.4 14.7 186 ----- ----- Basin Index (%) 229 180 BIGHORN BASIN Bald Mtn. 9380 24.0 20.5 117 20.4 19.4 105 Bear Trap Meadow 8200 7.2 1.3 554 14.5 10.3 141 Bone Springs Div 9350 23.3 16.5 141 20.6 17.9 115 Grave Springs 8550 11.2 9.3 120 13.3 12.5 106 Kirwin 9550 26.0 10.3 252 28.7 13.5 213 Marquette 8760 -M -M * 23.5 -M * Middle Powder 7760 13.1 11.9 110 13.5 13.9 97 Owl Creek 8975 9.2 1.4 657 15.2 7.7 197 Powder River Pass 9480 11.9 9.7 123 17.7 14.8 120 Shell Creek 9580 20.1 16.0 126 17.7 16.0 111 Timber Creek 7950 8.4 3.4 247 15.0 9.7 155 ----- ----- Basin Index (%) 154 130 SHOSHONE RIVER Blackwater 9780 41.9 25.0 168 46.2 23.1 200 Evening Star 9200 41.2 24.8 166 48.6 30.1 161 Marquette 8760 -M -M * 23.5 -M * Sylvan Road 7120 .0 6.7 0 32.5 18.4 177 Younts Peak 8350 24.1 15.3 158 33.0 17.4 190 ----- ----- Basin Index (%) 149 180 POWDER RIVER Bear Trap Meadow 8200 7.2 1.3 554 14.5 10.3 141 Cloud Peak Reservoir 9860 21.6 16.5 131 25.6 16.2 158 Grave Springs 8550 11.2 9.3 120 13.3 12.5 106 Hansen Sawmill 8360 16.0 3.3 485 19.0 10.6 179 Middle Powder 7760 13.1 11.9 110 13.5 13.9 97 Powder River Pass 9480 11.9 9.7 123 17.7 14.8 120 Soldier Park 8720 18.3 -M * 20.2 -M * ----- ----- Basin Index (%) 156 132 TONGUE RIVER Big Goose 7990 15.0 9.2 163 19.2 13.7 140 Bone Springs Div 9350 23.3 16.5 141 20.6 17.9 115 Burgess Junction 7880 13.1 12.1 108 15.3 14.5 106 Dome Lake 8880 19.3 11.6 166 21.3 16.1 132 Little Goose 8870 18.9 -M * 23.6 -M * Sucker Creek 8880 16.2 12.4 131 18.3 17.0 108 Tie Creek 6870 4.3 2.8 154 19.2 13.9 138 ----- ----- Basin Index (%) 141 122 BELLE FOURCHE Cole Canyon 5910 1.7 .3 567* 11.7 11.5 102 ----- ----- Basin Index (%) 567* 102 CHEYENNE RIVER BASIN Blind Park 6890 .0 1.8 0 10.8 14.0 77 North Rapid Creek 6130 .0 1.8 0 9.6 11.9 81 ----- ----- Basin Index (%) 0 79 UPPER N. PLATTE Arapaho Ridge 10960 26.1 22.3 117 29.2 25.9 113 Blackhall Mtn 9820 36.7 -M * 41.6 -M * Columbine 9160 12.7 19.1 66 30.9 28.2 110 Divide Peak 8880 12.1 18.0 67 25.6 24.0 107 Joe Wright 10120 18.5 23.5 79 32.4 29.5 110 Laprele Creek 8375 6.4 6.7 96 14.5 14.8 98 Med Bow 10500 39.4 -M * 39.9 -M * North French Creek 10130 27.6 33.0 84 32.6 30.4 107 Never Summer 10280 24.7 21.6 114 22.3 -M * Old Battle 10000 40.0 34.6 116 42.3 38.8 109 Rawah 9020 5.8 7.0 83 20.0 17.0 118 Sage Creek Basin 7850 -M 1.2 * 17.9 16.0 112 Sand Lake 10050 32.3 31.3 103 31.1 28.7 108 South Brush Creek 8440 .5 9.8 5 14.8 17.6 84 Tower 10500 44.1 49.8 89 49.5 44.3 112 Webber Springs 9250 23.0 22.0 105 36.7 29.7 124 Willow Creek Pass 9540 19.0 13.9 137 20.3 15.5 131 Zirkel 9340 24.3 21.4 114 46.1 30.7 150 ----- ----- Basin Index (%) 95 114 SWEETWATER Deer Park 9700 37.2 16.2 230 41.9 23.1 181 Larsen Creek 9000 13.4 9.4 143 25.9 -M * South Pass 9040 34.3 15.1 227 33.2 20.1 165 ----- ----- Basin Index (%) 209 174 LOWER N. PLATTE Casper Mtn. 7900 12.7 14.0 91 18.1 17.7 102 Laprele Creek 8375 6.4 6.7 96 14.5 14.8 98 Reno Hill 8400 13.0 13.1 99 17.8 18.6 96 Windy Peak 7900 4.1 4.7 87 13.6 12.8 106 ----- ----- Basin Index (%) 94 100 LARAMIE RIVER Brooklyn Lake 10240 20.7 23.2 89 25.5 24.4 105 Cinnabar Park 9574 14.1 19.9 71 25.9 26.8 97 Crow Creek 8330 .2 .0 * 11.9 13.3 89 Deadman Hill 10220 21.8 18.8 116 23.9 20.4 117 Rawah 9020 5.8 7.0 83 20.0 17.0 118 Roach 9700 16.1 17.3 93 24.5 22.0 111 ----- ----- Basin Index (%) 91 106 S. PLATTE Black Mountain 8920 8.4 -M * 15.8 -M * Crow Creek 8330 .2 .0 * 11.9 13.3 89 Deadman Hill 10220 21.8 18.8 116 23.9 20.4 117 ----- ----- Basin Index (%) 117* 106 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 19.4 17.0 114 Divide Peak 8880 12.1 18.0 67 25.6 24.0 107 Elk River 8700 6.0 13.8 43 23.2 22.4 104 Little Snake River 8915 23.3 22.7 103 42.8 32.4 132 Old Battle 10000 40.0 34.6 116 42.3 38.8 109 Sage Creek Basin 7850 -M 1.2 * 17.9 16.0 112 Sandstone RS 8150 .0 6.7 0 18.3 20.6 89 Whiskey Park 8950 24.3 26.1 93 34.7 31.1 112 ----- ----- Basin Index (%) 87 111 UPPER GREEN RIVER Big Sandy Opening 9080 23.0 11.3 204 25.6 15.0 171 Blind Bull Sum 8650 -M 23.7 * 38.7 21.1 183 East Rim Divide 7930 11.1 8.4 132 22.4 12.7 176 Elkhart Park G.S. 9400 20.9 11.6 180 26.2 14.8 177 Gros Ventre Summit 8750 21.7 11.8 184 26.4 14.4 183 Gunsight Pass 9820 -M 13.0 * 28.1 15.9 177 Kendall R.S. 7740 15.5 5.2 298 30.6 15.4 199 Loomis Park 8240 24.7 11.3 219 34.2 18.7 183 New Fork Lake 8340 13.0 6.8 191 19.3 11.9 162 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 15.8 9.7 163 28.8 15.4 187 Spring Creek Divide 9000 44.4 24.3 183 43.8 25.9 169 Triple Peak 8500 36.6 18.2 201 44.3 27.6 161 ----- ----- Basin Index (%) 191 176 LOWER GREEN RIVER Blacks Fork Jct 8869 5.6 -M * 18.8 -M * Buck Pasture 9632 16.8 -M * 27.2 -M * EF Blacks Fork GS 9360 13.2 -M * 21.3 -M * Hams Fork 7840 10.1 3.7 273 23.7 12.9 184 Hewinta 9500 8.0 5.3 151 20.8 15.9 131 Hickerson Park 9122 4.7 4.7 100 14.8 11.8 125 Hole-in-Rock 9168 5.3 3.3 161 15.5 11.3 137 Indian Creek 9425 43.8 23.5 186 44.7 24.7 181 Kelley R.S. 8180 24.5 11.8 208 33.6 19.9 169 Spirit Lk 10235 15.3 -M * 20.5 -M * Steel Creek Park 10158 22.6 16.9 134 25.1 18.8 134 ----- ----- Basin Index (%) 172 155 UPPER BEAR RIVER Bear River RS 8777 2.0 -M * 21.4 -M * Bug Lake 7987 33.6 15.7 214 37.6 21.4 176 Burts Miller Ranch 8000 .5 -M * 11.8 -M * Chalk Creek #1 9171 34.5 24.6 140 40.9 28.1 146 Hayden Fork 9130 15.3 9.7 158 33.7 23.5 143 Kelley R.S. 8180 24.5 11.8 208 33.6 19.9 169 Lily Lake 9133 13.1 9.8 134 23.0 19.3 119 Monte Cristo 8932 38.7 27.1 143 44.0 28.9 152 Salt River Summit 7760 18.0 8.1 222 -M 18.2 * ----- ----- Basin Index (%) 166 151 ----------------------------------------------------------------------------- -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.