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: FEBRUARY 25 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 23.5 13.2 178 31.5 16.9 186 Black Bear 8170 35.4 28.7 123 42.4 30.1 141 Blind Bull Sum 8650 35.9 17.4 206 -M 15.7 * Cottonwood Creek 7670 24.1 16.2 149 30.9 19.1 162 East Rim Divide 7930 17.0 7.7 221 18.4 9.4 196 Grand Targhee 9260 35.3 28.9 122 31.9 24.3 131 Granite Creek 6770 27.5 13.3 207 -M 16.1 * Grassy Lake 7265 31.3 25.4 123 42.6 29.0 147 Gros Ventre Summit 8750 16.6 9.4 177 -M 9.9 * Gunsight Pass 9820 17.5 10.3 170 20.2 10.6 191 Lewis Lake Divide 7850 32.5 25.0 130 41.6 28.3 147 Phillips Bench 8200 30.4 19.2 158 38.7 22.3 174 Salt River Summit 7760 18.8 10.3 183 24.3 13.2 184 Snake River Station 6920 19.2 13.9 138 30.0 18.3 164 Spring Creek Divide 9000 32.3 17.8 181 -M 18.9 * Thumb Divide 7980 19.6 11.7 168 -M 14.3 * Togwotee Pass 9580 27.2 17.3 157 31.2 19.0 164 Two Ocean Plateau 9240 -M 21.2 * -M 21.2 * Willow Creek 8380 28.5 21.8 131 41.1 26.3 156 Younts Peak 8350 21.8 11.4 191 24.7 12.4 199 ----- ----- Basin Index (%) 155 161 MADISON-GALLATIN Black Bear 8170 35.4 28.7 123 42.4 30.1 141 Canyon 7870 14.9 10.2 146 21.2 12.8 166 Madison Plateau 7750 21.8 17.4 125 29.7 20.7 143 West Yellowstone 6700 11.4 8.6 133 19.5 11.3 173 Whiskey Creek 6800 13.0 11.7 111 21.9 15.9 138 ----- ----- Basin Index (%) 126 148 YELLOWSTONE Beartooth Lake 9360 25.0 16.1 155 20.4 15.4 132 Burnt Mtn 5880 5.4 4.0 135 11.0 9.1 121 Canyon 7870 14.9 10.2 146 21.2 12.8 166 Cole Creek 7850 8.4 9.2 91 5.9 8.8 67 Evening Star 9200 29.7 18.8 158 33.6 21.7 155 Fisher Creek 9100 31.5 25.1 125 35.8 25.0 143 Northeast Entrance 7350 9.8 7.8 126 15.7 9.7 162 Parker Peak 9400 25.6 15.5 165 23.2 13.7 169 Sylvan Lake 8420 20.1 15.5 130 30.9 17.6 176 Thumb Divide 7980 19.6 11.7 168 -M 14.3 * Two Ocean Plateau 9240 -M 21.2 * -M 21.2 * White Mill 8700 24.1 17.9 135 26.0 18.6 140 Wolverine 7650 13.8 8.4 164 17.4 9.7 179 ----- ----- Basin Index (%) 142 149 WIND RIVER Burroughs Creek 8750 20.3 -M * 22.1 -M * Castle Creek 8400 11.0 -M * 13.0 -M * Cold Springs 9630 11.5 5.4 213 13.7 7.3 188 Deer Park 9700 27.1 10.6 256 27.9 14.8 189 Hobbs Park 10100 20.9 9.3 225 19.3 9.2 210 Kirwin 9550 15.5 6.7 231 18.1 8.6 210 Little Warm 9370 13.6 7.7 177 19.3 9.6 201 Owl Creek 8975 6.5 3.8 171 8.2 4.2 195 South Pass 9040 24.8 11.0 225 22.8 13.1 174 St. Lawrence Alt 8620 7.2 5.0 144 11.7 6.3 186 Togwotee Pass 9580 27.2 17.3 157 31.2 19.0 164 Townsend Creek 8700 12.0 6.2 194 14.9 8.4 177 ----- ----- Basin Index (%) 200 186 BIGHORN BASIN Bald Mtn. 9380 14.5 14.2 102 12.4 12.6 98 Bear Trap Meadow 8200 4.1 4.2 98 5.4 6.0 90 Bone Springs Div 9350 12.3 11.5 107 11.9 11.4 104 Grave Springs 8550 5.0 6.4 78 5.5 7.6 72 Kirwin 9550 15.5 6.7 231 18.1 8.6 210 Marquette 8760 7.2 -M * 10.9 -M * Middle Powder 7760 5.9 7.7 77 5.4 8.5 64 Owl Creek 8975 6.5 3.8 171 8.2 4.2 195 Powder River Pass 9480 5.8 7.7 75 8.3 9.3 89 Shell Creek 9580 12.1 11.0 110 9.3 10.3 90 Timber Creek 7950 5.1 3.1 165 6.5 5.1 127 ----- ----- Basin Index (%) 114 109 SHOSHONE RIVER Blackwater 9780 29.5 16.8 176 32.8 15.8 208 Evening Star 9200 29.7 18.8 158 33.6 21.7 155 Marquette 8760 7.2 -M * 10.9 -M * Sylvan Road 7120 14.1 9.0 157 25.3 13.6 186 Younts Peak 8350 21.8 11.4 191 24.7 12.4 199 ----- ----- Basin Index (%) 170 183 POWDER RIVER Bear Trap Meadow 8200 4.1 4.2 98 5.4 6.0 90 Cloud Peak Reservoir 9860 9.6 10.1 95 10.7 9.3 115 Grave Springs 8550 5.0 6.4 78 5.5 7.6 72 Hansen Sawmill 8360 6.6 4.5 147 8.5 5.9 144 Middle Powder 7760 5.9 7.7 77 5.4 8.5 64 Powder River Pass 9480 5.8 7.7 75 8.3 9.3 89 Soldier Park 8720 9.5 -M * 8.2 -M * ----- ----- Basin Index (%) 91 94 TONGUE RIVER Big Goose 7990 6.9 6.0 115 7.8 7.6 103 Bone Springs Div 9350 12.3 11.5 107 11.9 11.4 104 Burgess Junction 7880 7.1 8.0 89 7.9 8.7 91 Dome Lake 8880 8.6 8.4 102 10.2 9.7 105 Little Goose 8870 7.6 -M * 9.8 -M * Sucker Creek 8880 8.2 8.6 95 7.9 10.2 77 Tie Creek 6870 4.7 4.2 112 8.5 8.0 106 ----- ----- Basin Index (%) 102 97 BELLE FOURCHE Cole Canyon 5910 2.6 4.9 53 5.0 6.9 72 ----- ----- Basin Index (%) 53 72 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.2 69 6.4 9.1 70 North Rapid Creek 6130 4.2 5.8 72 5.4 7.3 74 ----- ----- Basin Index (%) 71 72 UPPER N. PLATTE Arapaho Ridge 10960 21.7 16.0 136 22.1 17.2 128 Blackhall Mtn 9820 31.5 -M * 30.7 -M * Columbine 9160 22.0 19.2 115 23.5 19.8 119 Divide Peak 8880 16.9 15.2 111 19.0 16.5 115 Joe Wright 10120 16.9 15.9 106 24.0 19.4 124 Laprele Creek 8375 10.0 7.5 133 9.4 9.1 103 Med Bow 10500 32.3 -M * 29.4 -M * North French Creek 10130 21.4 20.4 105 22.6 20.4 111 Never Summer 10280 19.6 15.6 126 16.3 -M * Old Battle 10000 32.2 23.5 137 31.1 27.2 114 Rawah 9020 11.3 8.3 136 13.9 10.5 132 Sage Creek Basin 7850 14.0 10.4 135 14.2 11.5 123 Sand Lake 10050 24.4 20.5 119 22.5 18.4 122 South Brush Creek 8440 9.6 9.8 98 10.1 11.4 89 Tower 10500 37.3 35.4 105 37.1 31.0 120 Webber Springs 9250 25.5 18.2 140 28.7 20.6 139 Willow Creek Pass 9540 15.4 9.2 167 16.3 10.0 163 Zirkel 9340 36.1 22.5 160 36.9 22.8 162 ----- ----- Basin Index (%) 125 125 SWEETWATER Deer Park 9700 27.1 10.6 256 27.9 14.8 189 Larsen Creek 9000 17.4 9.2 189 20.1 -M * South Pass 9040 24.8 11.0 225 22.8 13.1 174 ----- ----- Basin Index (%) 225 182 LOWER N. PLATTE Casper Mtn. 7900 9.1 9.7 94 8.5 10.8 79 Laprele Creek 8375 10.0 7.5 133 9.4 9.1 103 Reno Hill 8400 9.6 9.5 101 9.6 10.8 89 Windy Peak 7900 8.7 5.6 155 9.0 7.6 118 ----- ----- Basin Index (%) 116 95 LARAMIE RIVER Brooklyn Lake 10240 21.1 14.6 145 18.9 15.6 121 Cinnabar Park 9574 16.4 16.6 99 18.7 19.2 97 Crow Creek 8330 4.6 6.6 70 7.2 7.6 95 Deadman Hill 10220 17.3 12.2 142 16.8 12.4 135 Rawah 9020 11.3 8.3 136 13.9 10.5 132 Roach 9700 14.7 12.1 121 17.3 14.3 121 ----- ----- Basin Index (%) 121 117 S. PLATTE Black Mountain 8920 8.5 -M * 9.7 -M * Crow Creek 8330 4.6 6.6 70 7.2 7.6 95 Deadman Hill 10220 17.3 12.2 142 16.8 12.4 135 ----- ----- Basin Index (%) 116 120 LITTLE SNAKE RIVER Battle Mountain 7440 10.0 9.5 105 14.0 11.8 119 Divide Peak 8880 16.9 15.2 111 19.0 16.5 115 Elk River 8700 17.9 14.7 122 17.4 15.6 112 Little Snake River 8915 28.7 19.4 148 33.2 24.4 136 Old Battle 10000 32.2 23.5 137 31.1 27.2 114 Sage Creek Basin 7850 14.0 10.4 135 14.2 11.5 123 Sandstone RS 8150 11.7 10.3 114 14.0 14.7 95 Whiskey Park 8950 23.6 20.7 114 25.4 21.9 116 ----- ----- Basin Index (%) 125 117 UPPER GREEN RIVER Big Sandy Opening 9080 18.4 9.7 190 20.4 10.2 200 Blind Bull Sum 8650 35.9 17.4 206 -M 15.7 * East Rim Divide 7930 17.0 7.7 221 18.4 9.4 196 Elkhart Park G.S. 9400 15.8 9.2 172 20.3 10.3 197 Gros Ventre Summit 8750 16.6 9.4 177 -M 9.9 * Gunsight Pass 9820 17.5 10.3 170 20.2 10.6 191 Kendall R.S. 7740 20.2 9.6 210 24.1 11.4 211 Loomis Park 8240 23.7 11.4 208 27.0 13.8 196 New Fork Lake 8340 14.8 7.9 187 14.9 8.6 173 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.3 9.3 197 23.4 11.3 207 Spring Creek Divide 9000 32.3 17.8 181 -M 18.9 * Triple Peak 8500 32.1 16.4 196 33.6 19.8 170 ----- ----- Basin Index (%) 193 192 LOWER GREEN RIVER Blacks Fork Jct 8869 9.6 -M * 12.5 -M * Buck Pasture 9632 16.5 -M * 19.0 -M * EF Blacks Fork GS 9360 13.6 -M * -M -M * Hams Fork 7840 15.6 8.9 175 17.2 9.0 191 Hewinta 9500 10.6 7.6 139 12.8 10.5 122 Hickerson Park 9122 7.6 5.6 136 7.4 7.4 100 Hole-in-Rock 9168 6.1 5.4 113 8.2 6.9 119 Indian Creek 9425 33.1 18.2 182 -M 17.4 * Kelley R.S. 8180 23.3 11.6 201 26.7 14.3 187 Spirit Lk 10235 13.2 -M * 13.9 -M * Steel Creek Park 10158 14.0 11.1 126 15.8 12.0 132 ----- ----- Basin Index (%) 161 147 UPPER BEAR RIVER Bear River RS 8777 11.6 -M * 14.1 -M * Bug Lake 7987 27.3 14.3 191 27.3 15.1 181 Burts Miller Ranch 8000 7.1 -M * 7.3 -M * Chalk Creek #1 9171 28.9 17.7 163 -M 19.0 * Hayden Fork 9130 20.2 11.6 174 -M 16.0 * Kelley R.S. 8180 23.3 11.6 201 26.7 14.3 187 Lily Lake 9133 13.3 9.9 134 15.8 12.9 122 Monte Cristo 8932 30.3 20.0 152 29.4 20.0 147 Salt River Summit 7760 18.8 10.3 183 24.3 13.2 184 ----- ----- Basin Index (%) 170 164 ----------------------------------------------------------------------------- -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.