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 THURSDAY: FEBRUARY 23 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 23.6 13.1 180 31.5 16.7 189 Black Bear 8170 35.0 28.3 124 42.4 29.6 143 Blind Bull Sum 8650 35.7 17.3 206 -M 15.4 * Cottonwood Creek 7670 23.3 16.0 146 30.5 18.8 162 East Rim Divide 7930 17.0 7.6 224 18.4 9.2 200 Grand Targhee 9260 35.1 28.3 124 31.9 23.9 133 Granite Creek 6770 27.4 13.1 209 -M 15.9 * Grassy Lake 7265 31.2 25.1 124 42.6 28.6 149 Gros Ventre Summit 8750 16.6 9.4 177 18.9 9.7 195 Gunsight Pass 9820 17.5 10.1 173 20.4 10.4 196 Lewis Lake Divide 7850 32.6 24.8 131 41.5 27.8 149 Phillips Bench 8200 30.4 19.0 160 38.6 21.9 176 Salt River Summit 7760 -M 10.2 * -M 12.9 * Snake River Station 6920 19.3 13.7 141 30.0 18.0 167 Spring Creek Divide 9000 31.4 17.5 179 -M 18.6 * Thumb Divide 7980 19.8 11.4 174 -M 14.1 * Togwotee Pass 9580 26.8 17.1 157 30.9 18.7 165 Two Ocean Plateau 9240 -M 20.8 * -M 20.9 * Willow Creek 8380 27.9 21.3 131 40.1 25.8 155 Younts Peak 8350 21.9 11.3 194 24.9 12.2 204 ----- ----- Basin Index (%) 155 163 MADISON-GALLATIN Black Bear 8170 35.0 28.3 124 42.4 29.6 143 Canyon 7870 14.9 10.1 148 21.2 12.6 168 Madison Plateau 7750 21.8 17.2 127 29.7 20.3 146 West Yellowstone 6700 11.6 8.4 138 19.4 11.2 173 Whiskey Creek 6800 13.2 11.5 115 21.9 15.7 139 ----- ----- Basin Index (%) 128 151 YELLOWSTONE Beartooth Lake 9360 25.0 16.0 156 20.5 15.1 136 Burnt Mtn 5880 5.2 3.9 133 10.6 9.0 118 Canyon 7870 14.9 10.1 148 21.2 12.6 168 Cole Creek 7850 7.9 9.1 87 5.9 8.7 68 Evening Star 9200 29.7 18.6 160 35.4 21.4 165 Fisher Creek 9100 31.5 24.9 127 35.7 24.6 145 Northeast Entrance 7350 9.7 7.6 128 15.6 9.6 162 Parker Peak 9400 25.5 15.2 168 23.4 13.5 173 Sylvan Lake 8420 20.0 15.3 131 31.0 17.3 179 Thumb Divide 7980 19.8 11.4 174 -M 14.1 * Two Ocean Plateau 9240 -M 20.8 * -M 20.9 * White Mill 8700 24.1 17.7 136 26.0 18.4 141 Wolverine 7650 14.0 8.4 167 17.4 9.6 181 ----- ----- Basin Index (%) 144 152 WIND RIVER Burroughs Creek 8750 20.1 -M * 22.0 -M * Castle Creek 8400 10.9 -M * 13.1 -M * Cold Springs 9630 10.2 5.4 189 12.4 7.2 172 Deer Park 9700 24.9 10.4 239 27.6 14.5 190 Hobbs Park 10100 18.8 9.1 207 17.0 9.0 189 Kirwin 9550 15.3 6.6 232 18.1 8.4 215 Little Warm 9370 13.0 7.7 169 18.7 9.4 199 Owl Creek 8975 6.1 3.7 165 7.8 4.1 190 South Pass 9040 22.9 10.8 212 20.7 12.9 160 St. Lawrence Alt 8620 5.9 5.0 118 10.5 6.2 169 Togwotee Pass 9580 26.8 17.1 157 30.9 18.7 165 Townsend Creek 8700 9.6 6.1 157 12.6 8.3 152 ----- ----- Basin Index (%) 187 179 BIGHORN BASIN Bald Mtn. 9380 14.2 14.0 101 12.4 12.5 99 Bear Trap Meadow 8200 4.1 4.1 100 5.3 5.9 90 Bone Springs Div 9350 12.1 11.3 107 12.0 11.2 107 Grave Springs 8550 4.7 6.2 76 5.1 7.5 68 Kirwin 9550 15.3 6.6 232 18.1 8.4 215 Marquette 8760 6.5 -M * 10.2 -M * Middle Powder 7760 5.3 7.5 71 5.5 8.3 66 Owl Creek 8975 6.1 3.7 165 7.8 4.1 190 Powder River Pass 9480 5.6 7.6 74 8.4 9.2 91 Shell Creek 9580 12.1 10.8 112 9.4 10.1 93 Timber Creek 7950 4.6 3.1 148 6.0 5.0 120 ----- ----- Basin Index (%) 112 109 SHOSHONE RIVER Blackwater 9780 29.5 16.6 178 32.9 15.5 212 Evening Star 9200 29.7 18.6 160 35.4 21.4 165 Marquette 8760 6.5 -M * 10.2 -M * Sylvan Road 7120 14.1 8.9 158 25.3 13.5 187 Younts Peak 8350 21.9 11.3 194 24.9 12.2 204 ----- ----- Basin Index (%) 172 189 POWDER RIVER Bear Trap Meadow 8200 4.1 4.1 100 5.3 5.9 90 Cloud Peak Reservoir 9860 9.3 10.0 93 10.7 9.2 116 Grave Springs 8550 4.7 6.2 76 5.1 7.5 68 Hansen Sawmill 8360 6.4 4.4 145 8.2 5.8 141 Middle Powder 7760 5.3 7.5 71 5.5 8.3 66 Powder River Pass 9480 5.6 7.6 74 8.4 9.2 91 Soldier Park 8720 9.3 -M * 8.0 -M * ----- ----- Basin Index (%) 89 94 TONGUE RIVER Big Goose 7990 6.7 6.0 112 7.5 7.6 99 Bone Springs Div 9350 12.1 11.3 107 12.0 11.2 107 Burgess Junction 7880 7.0 7.8 90 8.2 8.6 95 Dome Lake 8880 8.5 8.2 104 9.9 9.6 103 Little Goose 8870 7.4 -M * 9.7 -M * Sucker Creek 8880 8.1 8.5 95 8.0 10.0 80 Tie Creek 6870 4.1 4.2 98 8.1 8.0 101 ----- ----- Basin Index (%) 101 98 BELLE FOURCHE Cole Canyon 5910 2.7 4.8 56 4.8 6.8 71 ----- ----- Basin Index (%) 56 71 CHEYENNE RIVER BASIN Blind Park 6890 4.5 6.0 75 6.3 9.0 70 North Rapid Creek 6130 4.4 5.7 77 5.4 7.2 75 ----- ----- Basin Index (%) 76 72 UPPER N. PLATTE Arapaho Ridge 10960 21.7 15.7 138 22.0 16.9 130 Blackhall Mtn 9820 31.3 -M * 30.5 -M * Columbine 9160 21.8 18.8 116 23.5 19.5 121 Divide Peak 8880 16.7 15.1 111 18.7 16.3 115 Joe Wright 10120 16.6 15.6 106 23.4 19.1 123 Laprele Creek 8375 9.5 7.3 130 8.7 9.0 97 Med Bow 10500 31.7 -M * 28.8 -M * North French Creek 10130 21.0 20.0 105 22.0 20.2 109 Never Summer 10280 19.2 15.2 126 15.8 -M * Old Battle 10000 31.6 23.2 136 31.3 27.0 116 Rawah 9020 10.8 8.0 135 13.8 10.3 134 Sage Creek Basin 7850 13.7 10.4 132 13.7 11.4 120 Sand Lake 10050 23.7 20.1 118 21.9 18.2 120 South Brush Creek 8440 9.6 9.5 101 10.0 11.2 89 Tower 10500 36.6 35.0 105 37.4 30.6 122 Webber Springs 9250 25.3 17.9 141 28.6 20.3 141 Willow Creek Pass 9540 15.3 9.1 168 16.2 9.9 164 Zirkel 9340 36.1 22.3 162 36.8 22.5 164 ----- ----- Basin Index (%) 125 125 SWEETWATER Deer Park 9700 24.9 10.4 239 27.6 14.5 190 Larsen Creek 9000 17.4 9.0 193 19.7 -M * South Pass 9040 22.9 10.8 212 20.7 12.9 160 ----- ----- Basin Index (%) 216 176 LOWER N. PLATTE Casper Mtn. 7900 8.0 9.6 83 7.5 10.6 71 Laprele Creek 8375 9.5 7.3 130 8.7 9.0 97 Reno Hill 8400 9.0 9.4 96 9.3 10.6 88 Windy Peak 7900 8.0 5.5 145 8.1 7.5 108 ----- ----- Basin Index (%) 108 89 LARAMIE RIVER Brooklyn Lake 10240 20.1 14.5 139 17.8 15.4 116 Cinnabar Park 9574 15.7 16.4 96 18.2 19.1 95 Crow Creek 8330 4.0 6.6 61 6.6 7.6 87 Deadman Hill 10220 16.9 12.1 140 16.0 12.2 131 Rawah 9020 10.8 8.0 135 13.8 10.3 134 Roach 9700 14.6 12.1 121 17.1 14.1 121 ----- ----- Basin Index (%) 118 114 S. PLATTE Black Mountain 8920 8.0 -M * 9.1 -M * Crow Creek 8330 4.0 6.6 61 6.6 7.6 87 Deadman Hill 10220 16.9 12.1 140 16.0 12.2 131 ----- ----- Basin Index (%) 112 114 LITTLE SNAKE RIVER Battle Mountain 7440 9.3 9.3 100 13.5 11.7 115 Divide Peak 8880 16.7 15.1 111 18.7 16.3 115 Elk River 8700 17.9 14.5 123 17.3 15.4 112 Little Snake River 8915 27.9 19.2 145 33.2 24.3 137 Old Battle 10000 31.6 23.2 136 31.3 27.0 116 Sage Creek Basin 7850 13.7 10.4 132 13.7 11.4 120 Sandstone RS 8150 11.4 10.3 111 13.6 14.6 93 Whiskey Park 8950 23.8 20.3 117 25.0 21.6 116 ----- ----- Basin Index (%) 125 117 UPPER GREEN RIVER Big Sandy Opening 9080 18.8 9.5 198 20.5 10.0 205 Blind Bull Sum 8650 35.7 17.3 206 -M 15.4 * East Rim Divide 7930 17.0 7.6 224 18.4 9.2 200 Elkhart Park G.S. 9400 15.9 9.0 177 20.3 10.0 203 Gros Ventre Summit 8750 16.6 9.4 177 18.9 9.7 195 Gunsight Pass 9820 17.5 10.1 173 20.4 10.4 196 Kendall R.S. 7740 20.3 9.5 214 -M 11.2 * Loomis Park 8240 23.6 11.3 209 26.9 13.5 199 New Fork Lake 8340 14.8 7.8 190 14.9 8.4 177 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 17.9 9.2 195 23.0 11.1 207 Spring Creek Divide 9000 31.4 17.5 179 -M 18.6 * Triple Peak 8500 32.1 16.2 198 33.4 19.4 172 ----- ----- Basin Index (%) 195 193 LOWER GREEN RIVER Blacks Fork Jct 8869 9.8 -M * 12.4 -M * Buck Pasture 9632 16.4 -M * 18.9 -M * EF Blacks Fork GS 9360 13.6 -M * 12.9 -M * Hams Fork 7840 15.2 8.8 173 16.7 8.8 190 Hewinta 9500 10.4 7.4 141 12.8 10.4 123 Hickerson Park 9122 7.5 5.5 136 7.7 7.3 105 Hole-in-Rock 9168 6.2 5.2 119 8.3 6.8 122 Indian Creek 9425 32.1 17.8 180 -M 17.1 * Kelley R.S. 8180 22.3 11.3 197 25.8 14.0 184 Spirit Lk 10235 12.8 -M * 13.8 -M * Steel Creek Park 10158 14.0 10.9 128 15.3 11.9 129 ----- ----- Basin Index (%) 161 146 UPPER BEAR RIVER Bear River RS 8777 11.4 -M * 13.9 -M * Bug Lake 7987 27.0 14.1 191 27.2 15.0 181 Burts Miller Ranch 8000 6.8 -M * 7.6 -M * Chalk Creek #1 9171 28.2 17.3 163 28.9 18.8 154 Hayden Fork 9130 19.9 11.5 173 -M 15.7 * Kelley R.S. 8180 22.3 11.3 197 25.8 14.0 184 Lily Lake 9133 13.3 9.8 136 15.5 12.7 122 Monte Cristo 8932 29.7 19.8 150 29.3 19.7 149 Salt River Summit 7760 -M 10.2 * -M 12.9 * ----- ----- Basin Index (%) 168 158 ----------------------------------------------------------------------------- -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.