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: FEBRUARY 15 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 21.8 12.6 173 29.4 15.5 190 Black Bear 8170 29.7 27.1 110 38.9 27.6 141 Blind Bull Sum 8650 32.6 15.9 205 -M 14.4 * Cottonwood Creek 7670 21.2 14.6 145 28.2 17.6 160 East Rim Divide 7930 15.3 7.3 210 17.2 8.5 202 Grand Targhee 9260 32.8 26.4 124 31.0 23.0 135 Granite Creek 6770 23.0 12.2 189 26.3 15.0 175 Grassy Lake 7265 29.2 23.8 123 41.5 26.8 155 Gros Ventre Summit 8750 -M 8.9 * -M 9.0 * Gunsight Pass 9820 15.6 9.4 166 18.9 10.0 189 Lewis Lake Divide 7850 29.0 23.0 126 39.6 25.9 153 Phillips Bench 8200 26.1 17.7 147 35.3 20.3 174 Salt River Summit 7760 16.9 9.2 184 22.5 11.9 189 Snake River Station 6920 17.5 13.0 135 28.7 17.1 168 Spring Creek Divide 9000 28.7 16.3 176 29.5 17.3 171 Thumb Divide 7980 17.0 10.6 160 21.0 13.3 158 Togwotee Pass 9580 24.6 16.4 150 28.6 17.6 162 Two Ocean Plateau 9240 -M 19.4 * -M 19.4 * Willow Creek 8380 26.7 19.3 138 36.4 24.1 151 Younts Peak 8350 19.5 10.7 182 23.4 11.6 202 ----- ----- Basin Index (%) 150 164 MADISON-GALLATIN Black Bear 8170 29.7 27.1 110 38.9 27.6 141 Canyon 7870 13.6 9.3 146 20.2 11.9 170 Madison Plateau 7750 18.8 15.6 121 27.4 19.0 144 West Yellowstone 6700 10.0 7.6 132 18.0 10.7 168 Whiskey Creek 6800 11.7 10.7 109 20.1 14.6 138 ----- ----- Basin Index (%) 119 149 YELLOWSTONE Beartooth Lake 9360 23.6 15.3 154 19.6 14.3 137 Burnt Mtn 5880 4.9 3.4 144 10.2 8.6 119 Canyon 7870 13.6 9.3 146 20.2 11.9 170 Cole Creek 7850 7.5 8.8 85 5.7 8.3 69 Evening Star 9200 27.7 17.5 158 30.0 20.1 149 Fisher Creek 9100 29.1 23.0 127 33.5 23.0 146 Northeast Entrance 7350 9.2 7.3 126 15.0 9.1 165 Parker Peak 9400 23.8 14.0 170 23.0 12.7 181 Sylvan Lake 8420 18.1 14.0 129 29.1 16.3 179 Thumb Divide 7980 17.0 10.6 160 21.0 13.3 158 Two Ocean Plateau 9240 -M 19.4 * -M 19.4 * White Mill 8700 22.6 16.2 140 24.9 17.2 145 Wolverine 7650 13.8 7.8 177 16.9 9.1 186 ----- ----- Basin Index (%) 143 152 WIND RIVER Burroughs Creek 8750 18.4 -M * 20.7 -M * Castle Creek 8400 10.0 -M * 12.1 -M * Cold Springs 9630 9.3 5.1 182 11.6 6.7 173 Deer Park 9700 22.9 9.7 236 26.5 13.9 191 Hobbs Park 10100 16.2 8.5 191 15.6 8.6 181 Kirwin 9550 13.9 6.2 224 17.1 7.9 216 Little Warm 9370 11.2 7.2 156 16.9 8.9 190 Owl Creek 8975 5.6 3.3 170 7.2 3.9 185 South Pass 9040 21.4 10.1 212 20.0 12.1 165 St. Lawrence Alt 8620 5.1 4.5 113 9.4 5.8 162 Togwotee Pass 9580 24.6 16.4 150 28.6 17.6 162 Townsend Creek 8700 8.5 5.8 147 11.7 7.8 150 ----- ----- Basin Index (%) 181 177 BIGHORN BASIN Bald Mtn. 9380 13.9 12.8 109 12.3 11.8 104 Bear Trap Meadow 8200 3.8 3.8 100 5.1 5.6 91 Bone Springs Div 9350 11.7 10.7 109 11.7 10.6 110 Grave Springs 8550 4.2 5.5 76 4.8 7.1 68 Kirwin 9550 13.9 6.2 224 17.1 7.9 216 Marquette 8760 6.3 -M * 10.0 -M * Middle Powder 7760 5.0 7.1 70 5.5 8.0 69 Owl Creek 8975 5.6 3.3 170 7.2 3.9 185 Powder River Pass 9480 4.9 7.1 69 7.8 8.6 91 Shell Creek 9580 11.5 10.1 114 9.1 9.6 95 Timber Creek 7950 4.4 3.1 142 5.8 4.8 121 ----- ----- Basin Index (%) 113 111 SHOSHONE RIVER Blackwater 9780 27.5 15.5 177 30.8 14.6 211 Evening Star 9200 27.7 17.5 158 30.0 20.1 149 Marquette 8760 6.3 -M * 10.0 -M * Sylvan Road 7120 13.3 8.6 155 24.4 12.9 189 Younts Peak 8350 19.5 10.7 182 23.4 11.6 202 ----- ----- Basin Index (%) 168 183 POWDER RIVER Bear Trap Meadow 8200 3.8 3.8 100 5.1 5.6 91 Cloud Peak Reservoir 9860 8.7 9.5 92 10.3 8.6 120 Grave Springs 8550 4.2 5.5 76 4.8 7.1 68 Hansen Sawmill 8360 6.0 4.3 140 7.8 5.5 142 Middle Powder 7760 5.0 7.1 70 5.5 8.0 69 Powder River Pass 9480 4.9 7.1 69 7.8 8.6 91 Soldier Park 8720 9.4 -M * 7.8 -M * ----- ----- Basin Index (%) 87 95 TONGUE RIVER Big Goose 7990 6.4 5.6 114 7.4 7.2 103 Bone Springs Div 9350 11.7 10.7 109 11.7 10.6 110 Burgess Junction 7880 6.9 7.4 93 8.1 8.2 99 Dome Lake 8880 8.1 7.7 105 9.5 9.1 104 Little Goose 8870 6.9 -M * 9.2 -M * Sucker Creek 8880 7.8 7.9 99 7.9 9.5 83 Tie Creek 6870 4.4 3.8 116 8.0 7.7 104 ----- ----- Basin Index (%) 105 101 BELLE FOURCHE Cole Canyon 5910 3.2 4.4 73 4.7 6.5 72 ----- ----- Basin Index (%) 73 72 CHEYENNE RIVER BASIN Blind Park 6890 4.5 5.6 80 5.9 8.5 69 North Rapid Creek 6130 4.4 5.3 83 5.2 6.9 75 ----- ----- Basin Index (%) 82 72 UPPER N. PLATTE Arapaho Ridge 10960 21.4 14.6 147 21.8 16.0 136 Blackhall Mtn 9820 30.0 -M * 29.6 -M * Columbine 9160 21.6 17.1 126 23.1 18.4 126 Divide Peak 8880 15.3 13.9 110 17.8 15.3 116 Joe Wright 10120 15.9 14.4 110 23.0 17.9 128 Laprele Creek 8375 9.0 6.4 141 8.5 8.4 101 Med Bow 10500 29.8 -M * 27.6 -M * North French Creek 10130 19.1 18.9 101 20.4 18.9 108 Never Summer 10280 18.6 13.9 134 15.4 -M * Old Battle 10000 29.7 21.7 137 31.2 25.3 123 Rawah 9020 10.9 7.3 149 13.5 9.8 138 Sage Creek Basin 7850 12.6 9.5 133 12.8 10.9 117 Sand Lake 10050 22.2 18.3 121 21.0 16.9 124 South Brush Creek 8440 8.4 8.2 102 9.2 10.5 88 Tower 10500 35.4 32.0 111 37.0 28.6 129 Webber Springs 9250 23.4 16.4 143 27.4 19.0 144 Willow Creek Pass 9540 15.0 8.4 179 15.9 9.3 171 Zirkel 9340 34.5 20.6 167 35.9 21.3 169 ----- ----- Basin Index (%) 130 129 SWEETWATER Deer Park 9700 22.9 9.7 236 26.5 13.9 191 Larsen Creek 9000 16.1 8.4 192 18.6 -M * South Pass 9040 21.4 10.1 212 20.0 12.1 165 ----- ----- Basin Index (%) 214 179 LOWER N. PLATTE Casper Mtn. 7900 7.6 8.7 87 7.5 10.0 75 Laprele Creek 8375 9.0 6.4 141 8.5 8.4 101 Reno Hill 8400 8.6 8.6 100 9.0 10.0 90 Windy Peak 7900 7.2 5.0 144 7.7 7.1 108 ----- ----- Basin Index (%) 113 92 LARAMIE RIVER Brooklyn Lake 10240 19.3 13.6 142 17.4 14.4 121 Cinnabar Park 9574 15.0 15.6 96 17.7 18.0 98 Crow Creek 8330 3.8 6.2 61 6.2 7.1 87 Deadman Hill 10220 16.4 11.3 145 15.9 11.4 139 Rawah 9020 10.9 7.3 149 13.5 9.8 138 Roach 9700 14.0 11.3 124 16.5 13.2 125 ----- ----- Basin Index (%) 122 118 S. PLATTE Black Mountain 8920 7.6 -M * 8.7 -M * Crow Creek 8330 3.8 6.2 61 6.2 7.1 87 Deadman Hill 10220 16.4 11.3 145 15.9 11.4 139 ----- ----- Basin Index (%) 115 119 LITTLE SNAKE RIVER Battle Mountain 7440 9.1 8.4 108 12.5 11.0 114 Divide Peak 8880 15.3 13.9 110 17.8 15.3 116 Elk River 8700 16.4 13.5 121 16.8 14.4 117 Little Snake River 8915 26.3 18.0 146 32.1 23.0 140 Old Battle 10000 29.7 21.7 137 31.2 25.3 123 Sage Creek Basin 7850 12.6 9.5 133 12.8 10.9 117 Sandstone RS 8150 10.6 9.6 110 12.9 13.5 96 Whiskey Park 8950 21.7 18.8 115 24.0 20.3 118 ----- ----- Basin Index (%) 125 120 UPPER GREEN RIVER Big Sandy Opening 9080 17.0 8.9 191 19.2 9.3 206 Blind Bull Sum 8650 32.6 15.9 205 -M 14.4 * East Rim Divide 7930 15.3 7.3 210 17.2 8.5 202 Elkhart Park G.S. 9400 14.1 8.4 168 19.1 9.3 205 Gros Ventre Summit 8750 -M 8.9 * -M 9.0 * Gunsight Pass 9820 15.6 9.4 166 18.9 10.0 189 Kendall R.S. 7740 18.4 8.8 209 22.8 10.3 221 Loomis Park 8240 21.6 10.5 206 26.1 12.5 209 New Fork Lake 8340 13.9 7.4 188 14.1 7.8 181 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 15.7 8.9 176 21.6 10.3 210 Spring Creek Divide 9000 28.7 16.3 176 29.5 17.3 171 Triple Peak 8500 30.3 15.3 198 31.1 17.9 174 ----- ----- Basin Index (%) 191 194 LOWER GREEN RIVER Blacks Fork Jct 8869 8.7 -M * 11.4 -M * Buck Pasture 9632 14.9 -M * 17.9 -M * EF Blacks Fork GS 9360 12.5 -M * -M -M * Hams Fork 7840 14.1 8.2 172 16.0 8.2 195 Hewinta 9519 9.7 6.8 143 11.5 9.7 119 Hickerson Park 9145 6.4 4.9 131 6.5 6.8 96 Hole-in-Rock 9150 5.2 4.7 111 7.1 6.4 111 Indian Creek 9425 28.8 16.3 177 -M 15.8 * Kelley R.S. 8180 20.4 10.3 198 24.1 13.0 185 Spirit Lk 10235 10.5 -M * 12.2 -M * Steel Creek Park 10200 12.5 10.1 124 14.4 11.1 130 ----- ----- Basin Index (%) 158 144 UPPER BEAR RIVER Bear River RS 8777 10.8 -M * 13.0 -M * Bug Lake 7950 25.9 13.0 199 24.2 13.8 175 Burts Miller Ranch 8000 5.6 -M * 6.6 -M * Chalk Creek #1 8993 25.7 15.7 164 27.0 17.5 154 Hayden Fork 9212 17.9 10.6 169 -M 14.7 * Kelley R.S. 8180 20.4 10.3 198 24.1 13.0 185 Lily Lake 9156 12.4 8.7 143 14.4 11.9 121 Monte Cristo 8960 26.4 18.4 143 -M 18.2 * Salt River Summit 7760 16.9 9.2 184 22.5 11.9 189 ----- ----- Basin Index (%) 169 165 ----------------------------------------------------------------------------- -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.