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 MONDAY: FEBRUARY 27 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 23.7 13.3 178 31.6 17.1 185 Black Bear 8170 36.5 29.1 125 43.2 30.5 142 Blind Bull Sum 8650 36.3 17.6 206 -M 15.8 * Cottonwood Creek 7670 24.4 16.4 149 31.2 19.4 161 East Rim Divide 7930 17.0 7.9 215 18.5 9.5 195 Grand Targhee 9260 35.6 29.4 121 32.1 24.6 130 Granite Creek 6770 27.6 13.5 204 -M 16.4 * Grassy Lake 7265 31.7 25.7 123 42.8 29.2 147 Gros Ventre Summit 8750 16.7 9.5 176 19.0 10.0 190 Gunsight Pass 9820 17.6 10.4 169 20.1 10.7 188 Lewis Lake Divide 7850 32.9 25.1 131 41.7 28.5 146 Phillips Bench 8200 30.5 19.4 157 38.8 22.5 172 Salt River Summit 7760 19.0 10.4 183 24.5 13.3 184 Snake River Station 6920 19.3 14.0 138 30.0 18.5 162 Spring Creek Divide 9000 32.7 18.1 181 -M 19.1 * Thumb Divide 7980 19.8 11.9 166 21.6 14.5 149 Togwotee Pass 9580 27.3 17.5 156 31.3 19.2 163 Two Ocean Plateau 9240 -M 21.4 * -M 21.5 * Willow Creek 8380 28.4 22.0 129 41.5 26.6 156 Younts Peak 8350 22.2 11.5 193 24.9 12.5 199 ----- ----- Basin Index (%) 155 161 MADISON-GALLATIN Black Bear 8170 36.5 29.1 125 43.2 30.5 142 Canyon 7870 15.2 10.4 146 21.2 12.9 164 Madison Plateau 7750 22.3 17.6 127 29.9 21.0 142 West Yellowstone 6700 11.6 8.8 132 19.7 11.5 171 Whiskey Creek 6800 13.3 11.9 112 22.0 16.1 137 ----- ----- Basin Index (%) 127 148 YELLOWSTONE Beartooth Lake 9360 25.2 16.2 156 20.5 15.6 131 Burnt Mtn 5880 5.4 4.0 135 11.1 9.2 121 Canyon 7870 15.2 10.4 146 21.2 12.9 164 Cole Creek 7850 8.4 9.5 88 6.1 8.9 69 Evening Star 9200 30.0 18.9 159 35.5 21.9 162 Fisher Creek 9100 31.9 25.4 126 35.9 25.2 142 Northeast Entrance 7350 10.1 7.9 128 15.7 9.8 160 Parker Peak 9400 25.9 15.8 164 23.2 13.8 168 Sylvan Lake 8420 20.3 15.7 129 31.1 17.8 175 Thumb Divide 7980 19.8 11.9 166 21.6 14.5 149 Two Ocean Plateau 9240 -M 21.4 * -M 21.5 * White Mill 8700 24.5 18.0 136 26.1 18.8 139 Wolverine 7650 13.7 8.5 161 17.5 9.9 177 ----- ----- Basin Index (%) 142 149 WIND RIVER Burroughs Creek 8750 20.4 -M * 22.2 -M * Castle Creek 8400 11.1 -M * 13.2 -M * Cold Springs 9630 11.7 5.4 217 13.8 7.4 186 Deer Park 9700 27.1 10.8 251 28.0 15.0 187 Hobbs Park 10100 21.2 9.4 226 19.4 9.3 209 Kirwin 9550 15.7 6.8 231 18.1 8.7 208 Little Warm 9370 13.8 7.8 177 19.3 9.8 197 Owl Creek 8975 6.5 3.8 171 8.2 4.2 195 South Pass 9040 24.8 11.2 221 22.8 13.3 171 St. Lawrence Alt 8620 7.4 5.0 148 11.9 6.4 186 Togwotee Pass 9580 27.3 17.5 156 31.3 19.2 163 Townsend Creek 8700 12.2 6.3 194 15.1 8.5 178 ----- ----- Basin Index (%) 200 185 BIGHORN BASIN Bald Mtn. 9380 14.7 14.4 102 12.8 12.9 99 Bear Trap Meadow 8200 4.4 4.3 102 5.5 6.0 92 Bone Springs Div 9350 12.8 11.6 110 12.3 11.6 106 Grave Springs 8550 5.1 6.6 77 5.7 7.7 74 Kirwin 9550 15.7 6.8 231 18.1 8.7 208 Marquette 8760 7.1 -M * 11.0 -M * Middle Powder 7760 5.9 7.8 76 5.6 8.6 65 Owl Creek 8975 6.5 3.8 171 8.2 4.2 195 Powder River Pass 9480 5.8 7.8 74 8.5 9.4 90 Shell Creek 9580 12.4 11.3 110 9.5 10.4 91 Timber Creek 7950 5.2 3.3 158 6.6 5.1 129 ----- ----- Basin Index (%) 114 110 SHOSHONE RIVER Blackwater 9780 29.6 16.9 175 33.0 15.9 208 Evening Star 9200 30.0 18.9 159 35.5 21.9 162 Marquette 8760 7.1 -M * 11.0 -M * Sylvan Road 7120 14.3 9.2 155 25.4 13.8 184 Younts Peak 8350 22.2 11.5 193 24.9 12.5 199 ----- ----- Basin Index (%) 170 185 POWDER RIVER Bear Trap Meadow 8200 4.4 4.3 102 5.5 6.0 92 Cloud Peak Reservoir 9860 9.7 10.2 95 11.1 9.4 118 Grave Springs 8550 5.1 6.6 77 5.7 7.7 74 Hansen Sawmill 8360 6.6 4.6 143 8.5 5.9 144 Middle Powder 7760 5.9 7.8 76 5.6 8.6 65 Powder River Pass 9480 5.8 7.8 74 8.5 9.4 90 Soldier Park 8720 9.6 -M * 8.2 -M * ----- ----- Basin Index (%) 91 96 TONGUE RIVER Big Goose 7990 7.1 6.1 116 7.9 7.7 103 Bone Springs Div 9350 12.8 11.6 110 12.3 11.6 106 Burgess Junction 7880 7.2 8.1 89 8.4 8.9 94 Dome Lake 8880 8.8 8.5 104 10.3 9.8 105 Little Goose 8870 7.6 -M * 9.9 -M * Sucker Creek 8880 8.3 8.7 95 8.1 10.4 78 Tie Creek 6870 4.8 4.2 114 8.6 8.2 105 ----- ----- Basin Index (%) 104 98 BELLE FOURCHE Cole Canyon 5910 2.8 5.0 56 5.4 7.0 77 ----- ----- Basin Index (%) 56 77 CHEYENNE RIVER BASIN Blind Park 6890 4.4 6.3 70 6.5 9.2 71 North Rapid Creek 6130 3.7 5.8 64 5.5 7.5 73 ----- ----- Basin Index (%) 67 72 UPPER N. PLATTE Arapaho Ridge 10960 22.1 16.3 136 22.4 17.4 129 Blackhall Mtn 9820 31.9 -M * 31.0 -M * Columbine 9160 22.6 19.4 116 24.0 20.2 119 Divide Peak 8880 17.0 15.4 110 19.2 16.6 116 Joe Wright 10120 17.0 16.2 105 24.3 19.7 123 Laprele Creek 8375 10.0 7.6 132 9.5 9.2 103 Med Bow 10500 32.8 -M * 29.4 -M * North French Creek 10130 21.6 20.8 104 22.7 20.8 109 Never Summer 10280 19.8 15.9 125 16.4 -M * Old Battle 10000 32.4 23.7 137 31.1 27.5 113 Rawah 9020 11.7 8.5 138 14.0 10.7 131 Sage Creek Basin 7850 14.3 10.5 136 14.2 11.5 123 Sand Lake 10050 24.7 20.8 119 22.9 18.6 123 South Brush Creek 8440 9.6 10.0 96 10.0 11.6 86 Tower 10500 37.7 35.7 106 37.2 31.5 118 Webber Springs 9250 25.6 18.4 139 29.2 20.9 140 Willow Creek Pass 9540 15.6 9.3 168 16.3 10.2 160 Zirkel 9340 36.5 22.7 161 37.1 23.2 160 ----- ----- Basin Index (%) 125 124 SWEETWATER Deer Park 9700 27.1 10.8 251 28.0 15.0 187 Larsen Creek 9000 17.8 9.3 191 19.8 -M * South Pass 9040 24.8 11.2 221 22.8 13.3 171 ----- ----- Basin Index (%) 223 180 LOWER N. PLATTE Casper Mtn. 7900 9.0 9.9 91 8.6 10.9 79 Laprele Creek 8375 10.0 7.6 132 9.5 9.2 103 Reno Hill 8400 9.7 9.7 100 9.7 10.9 89 Windy Peak 7900 8.8 5.7 154 9.2 7.7 119 ----- ----- Basin Index (%) 114 96 LARAMIE RIVER Brooklyn Lake 10240 21.3 14.7 145 19.0 15.8 120 Cinnabar Park 9574 16.6 16.8 99 19.0 19.4 98 Crow Creek 8330 4.9 6.6 74 7.3 7.7 95 Deadman Hill 10220 17.5 12.3 142 16.6 12.6 132 Rawah 9020 11.7 8.5 138 14.0 10.7 131 Roach 9700 14.8 12.2 121 17.4 14.5 120 ----- ----- Basin Index (%) 122 116 S. PLATTE Black Mountain 8920 8.7 -M * 9.8 -M * Crow Creek 8330 4.9 6.6 74 7.3 7.7 95 Deadman Hill 10220 17.5 12.3 142 16.6 12.6 132 ----- ----- Basin Index (%) 119 118 LITTLE SNAKE RIVER Battle Mountain 7440 10.1 9.7 104 14.1 12.0 118 Divide Peak 8880 17.0 15.4 110 19.2 16.6 116 Elk River 8700 18.3 15.0 122 17.9 15.8 113 Little Snake River 8915 28.8 19.6 147 33.2 24.7 134 Old Battle 10000 32.4 23.7 137 31.1 27.5 113 Sage Creek Basin 7850 14.3 10.5 136 14.2 11.5 123 Sandstone RS 8150 11.6 10.3 113 14.0 14.9 94 Whiskey Park 8950 23.8 21.0 113 25.8 22.1 117 ----- ----- Basin Index (%) 125 117 UPPER GREEN RIVER Big Sandy Opening 9080 18.6 9.8 190 20.4 10.4 196 Blind Bull Sum 8650 36.3 17.6 206 -M 15.8 * East Rim Divide 7930 17.0 7.9 215 18.5 9.5 195 Elkhart Park G.S. 9400 15.9 9.3 171 20.3 10.4 195 Gros Ventre Summit 8750 16.7 9.5 176 19.0 10.0 190 Gunsight Pass 9820 17.6 10.4 169 20.1 10.7 188 Kendall R.S. 7740 20.4 9.7 210 24.2 11.6 209 Loomis Park 8240 23.8 11.6 205 27.1 13.9 195 New Fork Lake 8340 14.8 8.1 183 14.9 8.7 171 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.5 9.4 197 23.7 11.4 208 Spring Creek Divide 9000 32.7 18.1 181 -M 19.1 * Triple Peak 8500 32.3 16.5 196 33.8 20.0 169 ----- ----- Basin Index (%) 192 190 LOWER GREEN RIVER Blacks Fork Jct 8869 9.9 -M * 12.6 -M * Buck Pasture 9632 16.8 -M * 19.1 -M * EF Blacks Fork GS 9360 14.0 -M * 11.1 -M * Hams Fork 7840 15.8 9.1 174 17.4 9.1 191 Hewinta 9500 11.3 7.7 147 13.1 10.7 122 Hickerson Park 9122 7.8 5.7 137 7.9 7.4 107 Hole-in-Rock 9168 6.3 5.5 115 8.4 7.0 120 Indian Creek 9425 33.5 18.5 181 -M 17.6 * Kelley R.S. 8180 23.4 11.9 197 26.7 14.4 185 Spirit Lk 10235 13.2 -M * 14.0 -M * Steel Creek Park 10158 14.1 11.3 125 15.8 12.2 130 ----- ----- Basin Index (%) 161 147 UPPER BEAR RIVER Bear River RS 8777 11.6 -M * 14.1 -M * Bug Lake 7987 27.4 14.5 189 27.5 15.3 180 Burts Miller Ranch 8000 7.1 -M * 7.6 -M * Chalk Creek #1 9171 29.3 17.9 164 28.1 19.2 146 Hayden Fork 9130 20.7 11.8 175 -M 16.2 * Kelley R.S. 8180 23.4 11.9 197 26.7 14.4 185 Lily Lake 9133 13.5 10.0 135 15.7 13.0 121 Monte Cristo 8932 30.7 20.4 150 29.6 20.3 146 Salt River Summit 7760 19.0 10.4 183 24.5 13.3 184 ----- ----- Basin Index (%) 169 159 ----------------------------------------------------------------------------- -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.