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 MONDAY: FEBRUARY 20 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 22.2 13.0 171 30.9 16.3 190 Black Bear 8170 32.1 27.8 115 40.5 29.0 140 Blind Bull Sum 8650 33.5 16.9 198 -M 15.1 * Cottonwood Creek 7670 22.4 15.5 145 29.6 18.4 161 East Rim Divide 7930 15.8 7.5 211 17.6 8.9 198 Grand Targhee 9260 34.4 27.6 125 31.0 23.7 131 Granite Creek 6770 24.5 13.0 188 26.5 15.6 170 Grassy Lake 7265 30.2 24.7 122 42.7 27.9 153 Gros Ventre Summit 8750 -M 9.2 * -M 9.5 * Gunsight Pass 9820 16.1 9.9 163 19.3 10.2 189 Lewis Lake Divide 7850 30.3 24.2 125 41.3 27.3 151 Phillips Bench 8200 29.0 18.6 156 38.1 21.3 179 Salt River Summit 7760 17.5 9.8 179 23.2 12.6 184 Snake River Station 6920 18.1 13.6 133 28.9 17.7 163 Spring Creek Divide 9000 29.9 17.0 176 29.6 18.2 163 Thumb Divide 7980 18.1 11.1 163 21.4 13.8 155 Togwotee Pass 9580 25.4 16.8 151 29.4 18.3 161 Two Ocean Plateau 9240 -M 20.2 * -M 20.4 * Willow Creek 8380 27.0 20.5 132 38.0 25.1 151 Younts Peak 8350 20.1 11.1 181 23.6 12.0 197 ----- ----- Basin Index (%) 150 162 MADISON-GALLATIN Black Bear 8170 32.1 27.8 115 40.5 29.0 140 Canyon 7870 13.9 9.8 142 20.4 12.4 165 Madison Plateau 7750 20.2 16.5 122 28.6 19.8 144 West Yellowstone 6700 -M 8.1 * -M 11.0 * Whiskey Creek 6800 12.5 11.3 111 20.8 15.3 136 ----- ----- Basin Index (%) 120 144 YELLOWSTONE Beartooth Lake 9360 23.8 15.7 152 19.7 14.9 132 Burnt Mtn 5880 4.8 3.8 126 10.1 8.9 113 Canyon 7870 13.9 9.8 142 20.4 12.4 165 Cole Creek 7850 7.5 8.9 84 5.7 8.6 66 Evening Star 9200 27.7 18.3 151 33.6 20.9 161 Fisher Creek 9100 29.6 24.4 121 33.9 24.0 141 Northeast Entrance 7350 9.4 7.5 125 15.3 9.4 163 Parker Peak 9400 24.2 14.7 165 23.3 13.2 177 Sylvan Lake 8420 18.6 14.9 125 29.6 17.0 174 Thumb Divide 7980 18.1 11.1 163 21.4 13.8 155 Two Ocean Plateau 9240 -M 20.2 * -M 20.4 * White Mill 8700 23.0 17.0 135 25.2 18.0 140 Wolverine 7650 13.7 8.2 167 16.9 9.4 180 ----- ----- Basin Index (%) 139 150 WIND RIVER Burroughs Creek 8750 18.6 -M * 20.8 -M * Castle Creek 8400 10.0 -M * 12.1 -M * Cold Springs 9630 9.7 5.3 183 11.9 7.0 170 Deer Park 9700 23.2 10.1 230 26.9 14.3 188 Hobbs Park 10100 16.8 9.0 187 15.7 8.9 176 Kirwin 9550 14.2 6.4 222 17.2 8.3 207 Little Warm 9370 11.5 7.6 151 17.1 9.3 184 Owl Creek 8975 5.6 3.5 160 7.2 4.0 180 South Pass 9040 21.8 10.6 206 20.2 12.7 159 St. Lawrence Alt 8620 5.0 4.8 104 9.5 6.1 156 Togwotee Pass 9580 25.4 16.8 151 29.4 18.3 161 Townsend Creek 8700 8.7 6.0 145 11.9 8.2 145 ----- ----- Basin Index (%) 177 172 BIGHORN BASIN Bald Mtn. 9380 14.1 13.7 103 12.4 12.2 102 Bear Trap Meadow 8200 3.8 3.9 97 5.1 5.8 88 Bone Springs Div 9350 12.0 11.2 107 11.8 11.0 107 Grave Springs 8550 4.5 5.9 76 4.9 7.4 66 Kirwin 9550 14.2 6.4 222 17.2 8.3 207 Marquette 8760 6.1 -M * 9.7 -M * Middle Powder 7760 5.0 7.4 68 5.6 8.2 68 Owl Creek 8975 5.6 3.5 160 7.2 4.0 180 Powder River Pass 9480 5.2 7.4 70 8.0 9.0 89 Shell Creek 9580 12.0 10.5 114 9.3 9.9 94 Timber Creek 7950 4.5 3.1 145 5.8 4.9 118 ----- ----- Basin Index (%) 111 108 SHOSHONE RIVER Blackwater 9780 27.9 16.2 172 31.0 15.2 204 Evening Star 9200 27.7 18.3 151 33.6 20.9 161 Marquette 8760 6.1 -M * 9.7 -M * Sylvan Road 7120 13.1 8.8 149 24.4 13.3 183 Younts Peak 8350 20.1 11.1 181 23.6 12.0 197 ----- ----- Basin Index (%) 163 183 POWDER RIVER Bear Trap Meadow 8200 3.8 3.9 97 5.1 5.8 88 Cloud Peak Reservoir 9860 8.9 9.9 90 10.6 9.0 118 Grave Springs 8550 4.5 5.9 76 4.9 7.4 66 Hansen Sawmill 8360 6.1 4.4 139 8.0 5.7 140 Middle Powder 7760 5.0 7.4 68 5.6 8.2 68 Powder River Pass 9480 5.2 7.4 70 8.0 9.0 89 Soldier Park 8720 9.2 -M * 7.7 -M * ----- ----- Basin Index (%) 86 94 TONGUE RIVER Big Goose 7990 6.6 5.9 112 7.4 7.5 99 Bone Springs Div 9350 12.0 11.2 107 11.8 11.0 107 Burgess Junction 7880 7.0 7.6 92 8.1 8.5 95 Dome Lake 8880 8.3 8.0 104 9.6 9.4 102 Little Goose 8870 7.0 -M * 9.3 -M * Sucker Creek 8880 7.9 8.2 96 8.0 9.9 81 Tie Creek 6870 4.1 4.1 100 7.9 7.9 100 ----- ----- Basin Index (%) 102 97 BELLE FOURCHE Cole Canyon 5910 3.0 4.7 64 4.7 6.8 69 ----- ----- Basin Index (%) 64 69 CHEYENNE RIVER BASIN Blind Park 6890 4.4 5.8 76 5.9 8.9 66 North Rapid Creek 6130 4.4 5.6 79 5.2 7.2 72 ----- ----- Basin Index (%) 77 69 UPPER N. PLATTE Arapaho Ridge 10960 21.5 15.3 141 22.0 16.6 133 Blackhall Mtn 9820 30.1 -M * 29.9 -M * Columbine 9160 21.6 18.2 119 23.6 19.1 124 Divide Peak 8880 15.9 14.6 109 18.0 16.0 112 Joe Wright 10120 16.4 15.3 107 23.4 18.6 126 Laprele Creek 8375 9.2 7.0 131 8.6 8.8 98 Med Bow 10500 30.6 -M * 27.8 -M * North French Creek 10130 19.8 19.6 101 21.1 19.8 107 Never Summer 10280 18.9 14.7 129 15.7 -M * Old Battle 10000 30.5 22.8 134 31.3 26.4 119 Rawah 9020 10.9 7.7 142 13.8 10.1 137 Sage Creek Basin 7850 12.8 10.2 125 13.1 11.3 116 Sand Lake 10050 22.8 19.4 118 21.3 17.8 120 South Brush Creek 8440 8.7 9.1 96 9.6 10.9 88 Tower 10500 35.8 34.0 105 37.3 29.9 125 Webber Springs 9250 24.4 17.4 140 27.9 19.9 140 Willow Creek Pass 9540 15.1 8.9 170 16.1 9.7 166 Zirkel 9340 34.9 21.7 161 36.2 22.2 163 ----- ----- Basin Index (%) 125 126 SWEETWATER Deer Park 9700 23.2 10.1 230 26.9 14.3 188 Larsen Creek 9000 16.6 8.8 189 19.0 -M * South Pass 9040 21.8 10.6 206 20.2 12.7 159 ----- ----- Basin Index (%) 209 174 LOWER N. PLATTE Casper Mtn. 7900 7.7 9.4 82 7.5 10.4 72 Laprele Creek 8375 9.2 7.0 131 8.6 8.8 98 Reno Hill 8400 8.6 9.2 93 9.2 10.5 88 Windy Peak 7900 7.3 5.4 135 7.8 7.4 105 ----- ----- Basin Index (%) 106 89 LARAMIE RIVER Brooklyn Lake 10240 19.4 14.3 136 17.6 15.0 117 Cinnabar Park 9574 15.0 16.2 93 17.8 18.9 94 Crow Creek 8330 3.6 6.6 55 6.2 7.4 84 Deadman Hill 10220 16.4 11.8 139 15.9 11.9 134 Rawah 9020 10.9 7.7 142 13.8 10.1 137 Roach 9700 14.0 11.9 118 16.7 13.8 121 ----- ----- Basin Index (%) 116 114 S. PLATTE Black Mountain 8920 7.6 -M * 8.8 -M * Crow Creek 8330 3.6 6.6 55 6.2 7.4 84 Deadman Hill 10220 16.4 11.8 139 15.9 11.9 134 ----- ----- Basin Index (%) 109 115 LITTLE SNAKE RIVER Battle Mountain 7440 8.9 8.9 100 13.0 11.4 114 Divide Peak 8880 15.9 14.6 109 18.0 16.0 112 Elk River 8700 16.9 14.1 120 16.9 15.1 112 Little Snake River 8915 27.0 18.8 144 32.4 24.1 134 Old Battle 10000 30.5 22.8 134 31.3 26.4 119 Sage Creek Basin 7850 12.8 10.2 125 13.1 11.3 116 Sandstone RS 8150 10.9 10.2 107 13.0 14.2 92 Whiskey Park 8950 22.7 19.8 115 24.4 21.1 116 ----- ----- Basin Index (%) 122 116 UPPER GREEN RIVER Big Sandy Opening 9080 17.7 9.3 190 19.8 9.8 202 Blind Bull Sum 8650 33.5 16.9 198 -M 15.1 * East Rim Divide 7930 15.8 7.5 211 17.6 8.9 198 Elkhart Park G.S. 9400 15.0 8.8 170 19.7 9.8 201 Gros Ventre Summit 8750 -M 9.2 * -M 9.5 * Gunsight Pass 9820 16.1 9.9 163 19.3 10.2 189 Kendall R.S. 7740 18.9 9.2 205 -M 10.9 * Loomis Park 8240 22.3 10.9 205 26.4 13.2 200 New Fork Lake 8340 14.2 7.6 187 14.3 8.2 174 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 16.6 9.1 182 21.9 10.8 203 Spring Creek Divide 9000 29.9 17.0 176 29.6 18.2 163 Triple Peak 8500 30.4 15.8 192 31.8 18.8 169 ----- ----- Basin Index (%) 189 186 LOWER GREEN RIVER Blacks Fork Jct 8869 8.9 -M * 11.6 -M * Buck Pasture 9632 15.5 -M * 18.0 -M * EF Blacks Fork GS 9360 12.4 -M * 10.0 -M * Hams Fork 7840 14.5 8.6 169 16.3 8.6 190 Hewinta 9519 9.7 7.2 135 11.9 10.1 118 Hickerson Park 9145 6.7 5.3 126 6.8 7.1 96 Hole-in-Rock 9150 5.5 5.0 110 7.5 6.7 112 Indian Creek 9425 30.2 17.2 176 -M 16.7 * Kelley R.S. 8180 21.4 11.0 195 25.2 13.7 184 Spirit Lk 10235 11.8 -M * 12.9 -M * Steel Creek Park 10200 12.9 10.6 122 14.7 11.6 127 ----- ----- Basin Index (%) 155 143 UPPER BEAR RIVER Bear River RS 8777 10.8 -M * 13.1 -M * Bug Lake 7950 25.9 13.7 189 25.6 14.6 175 Burts Miller Ranch 8000 6.2 -M * 6.8 -M * Chalk Creek #1 8993 26.7 16.8 159 27.3 18.4 148 Hayden Fork 9212 18.4 11.3 163 -M 15.4 * Kelley R.S. 8180 21.4 11.0 195 25.2 13.7 184 Lily Lake 9156 12.6 9.4 134 14.7 12.5 118 Monte Cristo 8960 27.9 19.4 144 26.1 19.3 135 Salt River Summit 7760 17.5 9.8 179 23.2 12.6 184 ----- ----- Basin Index (%) 165 156 ----------------------------------------------------------------------------- -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.