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: FEBRUARY 24 , 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 13.1 179 31.5 16.8 188 Black Bear 8170 35.1 28.5 123 42.4 29.9 142 Blind Bull Sum 8650 36.0 17.4 207 -M 15.5 * Cottonwood Creek 7670 24.0 16.1 149 31.0 18.9 164 East Rim Divide 7930 17.0 7.7 221 18.4 9.2 200 Grand Targhee 9260 35.1 28.6 123 -M 24.1 * Granite Creek 6770 27.5 13.2 208 -M 16.0 * Grassy Lake 7265 31.1 25.2 123 42.7 28.8 148 Gros Ventre Summit 8750 16.6 9.4 177 -M 9.8 * Gunsight Pass 9820 17.5 10.2 172 20.4 10.5 194 Lewis Lake Divide 7850 32.4 24.9 130 41.6 28.1 148 Phillips Bench 8200 30.5 19.1 160 38.7 22.1 175 Salt River Summit 7760 18.9 10.3 183 -M 13.0 * Snake River Station 6920 19.2 13.8 139 30.0 18.2 165 Spring Creek Divide 9000 32.2 17.6 183 -M 18.7 * Thumb Divide 7980 19.6 11.5 170 -M 14.2 * Togwotee Pass 9580 27.2 17.2 158 31.2 18.8 166 Two Ocean Plateau 9240 -M 21.0 * -M 21.0 * Willow Creek 8380 28.4 21.5 132 40.8 26.0 157 Younts Peak 8350 21.9 11.4 192 24.8 12.3 202 ----- ----- Basin Index (%) 156 164 MADISON-GALLATIN Black Bear 8170 35.1 28.5 123 42.4 29.9 142 Canyon 7870 14.9 10.2 146 21.2 12.7 167 Madison Plateau 7750 21.8 17.3 126 29.7 20.5 145 West Yellowstone 6700 11.3 8.5 133 19.5 11.3 173 Whiskey Creek 6800 13.1 11.6 113 21.9 15.8 139 ----- ----- Basin Index (%) 126 149 YELLOWSTONE Beartooth Lake 9360 24.9 16.0 156 20.4 15.2 134 Burnt Mtn 5880 5.4 3.9 138 10.9 9.1 120 Canyon 7870 14.9 10.2 146 21.2 12.7 167 Cole Creek 7850 8.3 9.2 90 6.1 8.8 69 Evening Star 9200 29.6 18.7 158 33.7 21.5 157 Fisher Creek 9100 31.5 25.0 126 35.7 24.8 144 Northeast Entrance 7350 9.7 7.7 126 15.6 9.6 162 Parker Peak 9400 25.4 15.4 165 23.3 13.6 171 Sylvan Lake 8420 20.0 15.4 130 31.0 17.4 178 Thumb Divide 7980 19.6 11.5 170 -M 14.2 * Two Ocean Plateau 9240 -M 21.0 * -M 21.0 * White Mill 8700 24.1 17.8 135 26.0 18.5 141 Wolverine 7650 14.0 8.4 167 17.4 9.7 179 ----- ----- Basin Index (%) 143 150 WIND RIVER Burroughs Creek 8750 20.3 -M * 22.1 -M * Castle Creek 8400 11.0 -M * 13.1 -M * Cold Springs 9630 11.6 5.4 215 13.8 7.2 192 Deer Park 9700 27.1 10.5 258 27.9 14.5 192 Hobbs Park 10100 20.9 9.2 227 19.3 9.1 212 Kirwin 9550 15.6 6.7 233 18.0 8.5 212 Little Warm 9370 13.7 7.7 178 19.3 9.5 203 Owl Creek 8975 6.5 3.7 176 8.2 4.2 195 South Pass 9040 24.8 10.9 228 22.6 13.0 174 St. Lawrence Alt 8620 -M 5.0 * 11.8 6.2 190 Togwotee Pass 9580 27.2 17.2 158 31.2 18.8 166 Townsend Creek 8700 -M 6.2 * -M 8.4 * ----- ----- Basin Index (%) 207 189 BIGHORN BASIN Bald Mtn. 9380 14.3 14.1 101 12.3 12.6 98 Bear Trap Meadow 8200 4.0 4.1 98 5.3 5.9 90 Bone Springs Div 9350 12.2 11.4 107 11.9 11.3 105 Grave Springs 8550 4.9 6.3 78 5.5 7.5 73 Kirwin 9550 15.6 6.7 233 18.0 8.5 212 Marquette 8760 7.1 -M * 10.8 -M * Middle Powder 7760 5.7 7.6 75 5.3 8.4 63 Owl Creek 8975 6.5 3.7 176 8.2 4.2 195 Powder River Pass 9480 5.7 7.6 75 8.3 9.2 90 Shell Creek 9580 12.1 10.9 111 9.3 10.2 91 Timber Creek 7950 5.1 3.1 165 6.5 5.0 130 ----- ----- Basin Index (%) 114 109 SHOSHONE RIVER Blackwater 9780 29.4 16.7 176 32.8 15.6 210 Evening Star 9200 29.6 18.7 158 33.7 21.5 157 Marquette 8760 7.1 -M * 10.8 -M * Sylvan Road 7120 14.1 9.0 157 25.3 13.6 186 Younts Peak 8350 21.9 11.4 192 24.8 12.3 202 ----- ----- Basin Index (%) 170 185 POWDER RIVER Bear Trap Meadow 8200 4.0 4.1 98 5.3 5.9 90 Cloud Peak Reservoir 9860 9.4 10.1 93 10.6 9.2 115 Grave Springs 8550 4.9 6.3 78 5.5 7.5 73 Hansen Sawmill 8360 6.6 4.5 147 8.4 5.8 145 Middle Powder 7760 5.7 7.6 75 5.3 8.4 63 Powder River Pass 9480 5.7 7.6 75 8.3 9.2 90 Soldier Park 8720 9.5 -M * 8.1 -M * ----- ----- Basin Index (%) 90 94 TONGUE RIVER Big Goose 7990 6.9 6.0 115 7.7 7.6 101 Bone Springs Div 9350 12.2 11.4 107 11.9 11.3 105 Burgess Junction 7880 7.0 7.9 89 8.0 8.7 92 Dome Lake 8880 8.6 8.3 104 10.1 9.7 104 Little Goose 8870 7.5 -M * 9.8 -M * Sucker Creek 8880 8.2 8.5 96 7.9 10.1 78 Tie Creek 6870 4.6 4.2 110 8.5 8.0 106 ----- ----- Basin Index (%) 103 98 BELLE FOURCHE Cole Canyon 5910 2.6 4.8 54 4.9 6.9 71 ----- ----- Basin Index (%) 54 71 CHEYENNE RIVER BASIN Blind Park 6890 4.4 6.1 72 6.4 9.0 71 North Rapid Creek 6130 4.3 5.7 75 5.5 7.3 75 ----- ----- Basin Index (%) 74 73 UPPER N. PLATTE Arapaho Ridge 10960 21.8 15.8 138 22.2 17.0 131 Blackhall Mtn 9820 31.4 -M * 30.7 -M * Columbine 9160 21.9 19.0 115 23.5 19.6 120 Divide Peak 8880 16.9 15.2 111 19.0 16.4 116 Joe Wright 10120 16.9 15.7 108 23.6 19.3 122 Laprele Creek 8375 10.0 7.4 135 9.4 9.0 104 Med Bow 10500 32.1 -M * 29.3 -M * North French Creek 10130 21.3 20.2 105 22.4 20.3 110 Never Summer 10280 19.6 15.4 127 16.3 -M * Old Battle 10000 32.1 23.3 138 31.3 27.1 115 Rawah 9020 11.2 8.2 137 14.0 10.3 136 Sage Creek Basin 7850 14.0 10.4 135 14.0 11.4 123 Sand Lake 10050 24.2 20.3 119 22.3 18.3 122 South Brush Creek 8440 9.7 9.7 100 10.2 11.3 90 Tower 10500 36.8 35.2 105 37.2 30.9 120 Webber Springs 9250 25.5 18.1 141 28.9 20.4 142 Willow Creek Pass 9540 15.5 9.1 170 16.3 10.0 163 Zirkel 9340 36.0 22.4 161 36.9 22.6 163 ----- ----- Basin Index (%) 126 126 SWEETWATER Deer Park 9700 27.1 10.5 258 27.9 14.5 192 Larsen Creek 9000 17.3 9.1 190 20.0 -M * South Pass 9040 24.8 10.9 228 22.6 13.0 174 ----- ----- Basin Index (%) 227 184 LOWER N. PLATTE Casper Mtn. 7900 9.1 9.7 94 8.5 10.7 79 Laprele Creek 8375 10.0 7.4 135 9.4 9.0 104 Reno Hill 8400 9.5 9.5 100 9.6 10.7 90 Windy Peak 7900 8.7 5.6 155 8.9 7.5 119 ----- ----- Basin Index (%) 116 96 LARAMIE RIVER Brooklyn Lake 10240 21.0 14.6 144 18.7 15.5 121 Cinnabar Park 9574 16.2 16.5 98 18.9 19.1 99 Crow Creek 8330 4.5 6.6 68 7.0 7.6 92 Deadman Hill 10220 17.2 12.1 142 16.7 12.3 136 Rawah 9020 11.2 8.2 137 14.0 10.3 136 Roach 9700 14.6 12.1 121 17.2 14.2 121 ----- ----- Basin Index (%) 121 117 S. PLATTE Black Mountain 8920 8.5 -M * 9.7 -M * Crow Creek 8330 4.5 6.6 68 7.0 7.6 92 Deadman Hill 10220 17.2 12.1 142 16.7 12.3 136 ----- ----- Basin Index (%) 116 119 LITTLE SNAKE RIVER Battle Mountain 7440 9.7 9.4 103 13.8 11.8 117 Divide Peak 8880 16.9 15.2 111 19.0 16.4 116 Elk River 8700 17.8 14.6 122 17.5 15.5 113 Little Snake River 8915 28.5 19.3 148 33.2 24.3 137 Old Battle 10000 32.1 23.3 138 31.3 27.1 115 Sage Creek Basin 7850 14.0 10.4 135 14.0 11.4 123 Sandstone RS 8150 11.7 10.3 114 13.8 14.6 95 Whiskey Park 8950 23.6 20.5 115 25.3 21.7 117 ----- ----- Basin Index (%) 125 118 UPPER GREEN RIVER Big Sandy Opening 9080 18.5 9.6 193 20.5 10.1 203 Blind Bull Sum 8650 36.0 17.4 207 -M 15.5 * East Rim Divide 7930 17.0 7.7 221 18.4 9.2 200 Elkhart Park G.S. 9400 15.8 9.1 174 20.2 10.1 200 Gros Ventre Summit 8750 16.6 9.4 177 -M 9.8 * Gunsight Pass 9820 17.5 10.2 172 20.4 10.5 194 Kendall R.S. 7740 20.2 9.6 210 24.2 11.3 214 Loomis Park 8240 23.7 11.4 208 26.9 13.6 198 New Fork Lake 8340 14.8 7.9 187 14.9 8.5 175 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.4 9.2 200 23.5 11.2 210 Spring Creek Divide 9000 32.2 17.6 183 -M 18.7 * Triple Peak 8500 32.1 16.3 197 33.6 19.6 171 ----- ----- Basin Index (%) 194 195 LOWER GREEN RIVER Blacks Fork Jct 8869 9.8 -M * 12.5 -M * Buck Pasture 9632 16.6 -M * 18.9 -M * EF Blacks Fork GS 9360 13.7 -M * -M -M * Hams Fork 7840 15.8 8.8 180 17.3 8.9 194 Hewinta 9500 10.6 7.5 141 12.9 10.4 124 Hickerson Park 9122 7.8 5.5 142 7.9 7.3 108 Hole-in-Rock 9168 6.3 5.3 119 8.4 6.8 124 Indian Creek 9425 33.0 18.0 183 -M 17.2 * Kelley R.S. 8180 23.3 11.4 204 26.7 14.2 188 Spirit Lk 10235 13.3 -M * 14.0 -M * Steel Creek Park 10158 14.1 11.0 128 15.7 12.0 131 ----- ----- Basin Index (%) 164 149 UPPER BEAR RIVER Bear River RS 8777 11.6 -M * 14.0 -M * Bug Lake 7987 27.2 14.2 192 27.3 15.0 182 Burts Miller Ranch 8000 7.0 -M * 7.5 -M * Chalk Creek #1 9171 28.8 17.5 165 -M 18.8 * Hayden Fork 9130 20.0 11.5 174 -M 15.8 * Kelley R.S. 8180 23.3 11.4 204 26.7 14.2 188 Lily Lake 9133 13.4 9.8 137 15.6 12.8 122 Monte Cristo 8932 30.2 19.9 152 29.4 19.9 148 Salt River Summit 7760 18.9 10.3 183 -M 13.0 * ----- ----- Basin Index (%) 171 160* ----------------------------------------------------------------------------- -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.