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 WEDNESDAY: MARCH 1 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.2 13.5 179 31.7 17.2 184 Black Bear 8170 37.5 29.6 127 44.2 30.8 144 Blind Bull Sum 8650 36.5 17.9 204 -M 16.0 * Cottonwood Creek 7670 25.0 16.9 148 31.5 19.6 161 East Rim Divide 7930 17.3 8.1 214 18.8 9.6 196 Grand Targhee 9260 35.9 30.2 119 32.1 24.8 129 Granite Creek 6770 27.9 13.8 202 -M 16.5 * Grassy Lake 7265 32.6 26.2 124 42.8 29.4 146 Gros Ventre Summit 8750 16.9 9.7 174 19.0 10.1 188 Gunsight Pass 9820 17.7 10.6 167 20.2 10.9 185 Lewis Lake Divide 7850 33.3 25.2 132 41.8 28.7 146 Phillips Bench 8200 31.0 19.7 157 39.0 22.7 172 Salt River Summit 7760 19.1 10.6 180 24.6 13.4 184 Snake River Station 6920 19.7 14.2 139 30.1 18.7 161 Spring Creek Divide 9000 33.3 18.6 179 29.6 19.3 153 Thumb Divide 7980 19.8 12.3 161 21.4 14.6 147 Togwotee Pass 9580 27.7 17.7 156 31.6 19.4 163 Two Ocean Plateau 9240 -M 21.6 * -M 21.6 * Willow Creek 8380 28.7 22.2 129 41.6 26.8 155 Younts Peak 8350 22.5 11.7 192 25.0 12.6 198 ----- ----- Basin Index (%) 154 160 MADISON-GALLATIN Black Bear 8170 37.5 29.6 127 44.2 30.8 144 Canyon 7870 15.3 10.5 146 21.5 13.0 165 Madison Plateau 7750 22.7 17.8 128 30.0 21.2 142 West Yellowstone 6700 11.4 9.0 127 19.8 11.7 169 Whiskey Creek 6800 13.8 12.0 115 22.5 16.3 138 ----- ----- Basin Index (%) 128 148 YELLOWSTONE Beartooth Lake 9360 25.4 16.7 152 20.8 15.7 132 Burnt Mtn 5880 5.2 4.0 130 11.1 9.5 117 Canyon 7870 15.3 10.5 146 21.5 13.0 165 Cole Creek 7850 8.4 9.9 85 6.1 9.1 67 Evening Star 9200 30.0 19.1 157 35.5 22.1 161 Fisher Creek 9100 32.6 25.8 126 36.7 25.5 144 Northeast Entrance 7350 10.3 8.2 126 15.9 9.9 161 Parker Peak 9400 26.2 16.0 164 23.2 14.0 166 Sylvan Lake 8420 20.5 15.9 129 31.3 18.0 174 Thumb Divide 7980 19.8 12.3 161 21.4 14.6 147 Two Ocean Plateau 9240 -M 21.6 * -M 21.6 * White Mill 8700 25.0 18.3 137 26.6 18.9 141 Wolverine 7650 13.7 8.5 161 17.6 10.0 176 ----- ----- Basin Index (%) 141 148 WIND RIVER Burroughs Creek 8750 20.6 -M * 22.3 -M * Castle Creek 8400 11.2 -M * 13.4 -M * Cold Springs 9630 11.6 5.5 211 13.8 7.5 184 Deer Park 9700 27.8 10.8 257 28.5 15.3 186 Hobbs Park 10100 21.3 9.7 220 19.6 9.5 206 Kirwin 9550 15.8 7.0 226 18.2 8.8 207 Little Warm 9370 13.8 7.9 175 19.3 9.8 197 Owl Creek 8975 6.7 3.9 172 8.3 4.3 193 South Pass 9040 25.4 11.4 223 22.9 13.5 170 St. Lawrence Alt 8620 7.2 5.2 138 11.8 6.5 182 Togwotee Pass 9580 27.7 17.7 156 31.6 19.4 163 Townsend Creek 8700 12.3 6.5 189 15.2 8.6 177 ----- ----- Basin Index (%) 198 183 BIGHORN BASIN Bald Mtn. 9380 15.1 14.7 103 13.0 13.1 99 Bear Trap Meadow 8200 4.4 4.4 100 5.6 6.1 92 Bone Springs Div 9350 13.4 12.0 112 12.7 11.7 109 Grave Springs 8550 5.1 6.9 74 5.7 7.9 72 Kirwin 9550 15.8 7.0 226 18.2 8.8 207 Marquette 8760 7.2 -M * 11.0 -M * Middle Powder 7760 5.9 8.0 74 5.6 8.7 64 Owl Creek 8975 6.7 3.9 172 8.3 4.3 193 Powder River Pass 9480 6.2 8.0 78 8.8 9.6 92 Shell Creek 9580 12.8 11.6 110 9.8 10.7 92 Timber Creek 7950 5.2 3.7 141 6.6 5.3 125 ----- ----- Basin Index (%) 113 109 SHOSHONE RIVER Blackwater 9780 29.9 17.2 174 33.1 16.1 206 Evening Star 9200 30.0 19.1 157 35.5 22.1 161 Marquette 8760 7.2 -M * 11.0 -M * Sylvan Road 7120 14.4 9.4 153 25.6 13.9 184 Younts Peak 8350 22.5 11.7 192 25.0 12.6 198 ----- ----- Basin Index (%) 169 184 POWDER RIVER Bear Trap Meadow 8200 4.4 4.4 100 5.6 6.1 92 Cloud Peak Reservoir 9860 9.8 10.4 94 11.1 9.6 116 Grave Springs 8550 5.1 6.9 74 5.7 7.9 72 Hansen Sawmill 8360 6.7 4.7 143 8.6 6.1 141 Middle Powder 7760 5.9 8.0 74 5.6 8.7 64 Powder River Pass 9480 6.2 8.0 78 8.8 9.6 92 Soldier Park 8720 9.7 -M * 8.4 -M * ----- ----- Basin Index (%) 90 95 TONGUE RIVER Big Goose 7990 7.1 6.2 115 8.0 7.9 101 Bone Springs Div 9350 13.4 12.0 112 12.7 11.7 109 Burgess Junction 7880 7.3 8.3 88 8.3 9.0 92 Dome Lake 8880 8.9 8.7 102 10.4 10.0 104 Little Goose 8870 7.8 -M * 10.1 -M * Sucker Creek 8880 8.6 8.9 97 8.3 10.6 78 Tie Creek 6870 4.8 4.3 112 8.9 8.4 106 ----- ----- Basin Index (%) 104 98 BELLE FOURCHE Cole Canyon 5910 3.0 5.0 60 5.6 7.1 79 ----- ----- Basin Index (%) 60 79 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.4 67 6.6 9.4 70 North Rapid Creek 6130 4.3 5.9 73 5.6 7.6 74 ----- ----- Basin Index (%) 70 72 UPPER N. PLATTE Arapaho Ridge 10960 22.5 16.7 135 22.7 17.7 128 Blackhall Mtn 9820 32.8 -M * 31.2 -M * Columbine 9160 22.7 19.8 115 24.3 20.3 120 Divide Peak 8880 17.8 15.8 113 19.8 16.8 118 Joe Wright 10120 17.5 16.6 105 24.3 19.9 122 Laprele Creek 8375 10.3 7.8 132 9.7 9.3 104 Med Bow 10500 33.7 -M * 30.2 -M * North French Creek 10130 22.2 21.1 105 23.4 21.1 111 Never Summer 10280 20.4 16.2 126 16.8 -M * Old Battle 10000 33.4 23.9 140 31.1 27.9 111 Rawah 9020 12.2 8.8 139 14.6 10.9 134 Sage Creek Basin 7850 14.6 10.6 138 14.7 11.7 126 Sand Lake 10050 25.6 21.2 121 23.6 18.9 125 South Brush Creek 8440 9.9 10.3 96 10.5 11.7 90 Tower 10500 37.7 36.3 104 37.3 31.8 117 Webber Springs 9250 26.2 18.7 140 29.8 21.1 141 Willow Creek Pass 9540 15.8 9.5 166 16.2 10.4 156 Zirkel 9340 37.5 23.0 163 37.1 23.4 159 ----- ----- Basin Index (%) 125 124 SWEETWATER Deer Park 9700 27.8 10.8 257 28.5 15.3 186 Larsen Creek 9000 18.1 9.5 191 20.5 -M * South Pass 9040 25.4 11.4 223 22.9 13.5 170 ----- ----- Basin Index (%) 225 178 LOWER N. PLATTE Casper Mtn. 7900 9.2 10.2 90 8.7 11.1 78 Laprele Creek 8375 10.3 7.8 132 9.7 9.3 104 Reno Hill 8400 9.8 10.0 98 9.8 11.1 88 Windy Peak 7900 9.0 5.7 158 9.3 7.8 119 ----- ----- Basin Index (%) 114 95 LARAMIE RIVER Brooklyn Lake 10240 21.7 15.0 145 19.4 16.0 121 Cinnabar Park 9574 17.1 17.1 100 19.5 19.7 99 Crow Creek 8330 4.7 6.7 70 7.4 7.8 95 Deadman Hill 10220 18.1 12.4 146 17.2 12.7 135 Rawah 9020 12.2 8.8 139 14.6 10.9 134 Roach 9700 15.0 12.4 121 17.7 14.7 120 ----- ----- Basin Index (%) 123 117 S. PLATTE Black Mountain 8920 9.0 -M * 10.2 -M * Crow Creek 8330 4.7 6.7 70 7.4 7.8 95 Deadman Hill 10220 18.1 12.4 146 17.2 12.7 135 ----- ----- Basin Index (%) 119 120 LITTLE SNAKE RIVER Battle Mountain 7440 11.0 9.9 111 14.7 12.1 121 Divide Peak 8880 17.8 15.8 113 19.8 16.8 118 Elk River 8700 19.4 15.5 125 18.7 15.9 118 Little Snake River 8915 29.7 19.7 151 33.3 24.9 134 Old Battle 10000 33.4 23.9 140 31.1 27.9 111 Sage Creek Basin 7850 14.6 10.6 138 14.7 11.7 126 Sandstone RS 8150 12.2 10.4 117 14.5 15.0 97 Whiskey Park 8950 24.8 21.5 115 26.2 22.4 117 ----- ----- Basin Index (%) 128 118 UPPER GREEN RIVER Big Sandy Opening 9080 19.0 10.1 188 20.7 10.5 197 Blind Bull Sum 8650 36.5 17.9 204 -M 16.0 * East Rim Divide 7930 17.3 8.1 214 18.8 9.6 196 Elkhart Park G.S. 9400 16.1 9.4 171 20.4 10.5 194 Gros Ventre Summit 8750 16.9 9.7 174 19.0 10.1 188 Gunsight Pass 9820 17.7 10.6 167 20.2 10.9 185 Kendall R.S. 7740 20.7 9.7 213 24.3 11.7 208 Loomis Park 8240 24.3 11.7 208 27.2 14.0 194 New Fork Lake 8340 14.9 8.2 182 14.9 8.8 169 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.9 9.6 197 23.7 11.5 206 Spring Creek Divide 9000 33.3 18.6 179 29.6 19.3 153 Triple Peak 8500 32.9 16.8 196 34.5 20.2 171 ----- ----- Basin Index (%) 191 185 LOWER GREEN RIVER Blacks Fork Jct 8869 10.4 -M * 13.0 -M * Buck Pasture 9632 17.4 -M * 19.6 -M * EF Blacks Fork GS 9360 14.4 -M * 13.5 -M * Hams Fork 7840 15.9 9.2 173 17.6 9.1 193 Hewinta 9500 11.9 7.9 151 13.8 10.8 128 Hickerson Park 9122 8.1 5.9 137 8.1 7.6 107 Hole-in-Rock 9168 6.6 5.6 118 8.7 7.1 123 Indian Creek 9425 34.0 19.0 179 -M 17.8 * Kelley R.S. 8180 23.9 12.1 198 26.8 14.6 184 Spirit Lk 10235 13.6 -M * 14.4 -M * Steel Creek Park 10158 14.6 11.5 127 16.2 12.4 131 ----- ----- Basin Index (%) 162 148 UPPER BEAR RIVER Bear River RS 8777 12.4 -M * 14.8 -M * Bug Lake 7987 28.0 14.8 189 27.9 15.5 180 Burts Miller Ranch 8000 7.7 -M * 8.3 -M * Chalk Creek #1 9171 30.5 18.3 167 30.7 19.4 158 Hayden Fork 9130 21.6 12.1 179 25.6 16.4 156 Kelley R.S. 8180 23.9 12.1 198 26.8 14.6 184 Lily Lake 9133 14.3 10.3 139 16.5 13.2 125 Monte Cristo 8932 31.8 21.0 151 30.8 20.5 150 Salt River Summit 7760 19.1 10.6 180 24.6 13.4 184 ----- ----- Basin Index (%) 171 162 ----------------------------------------------------------------------------- -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.