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 SUNDAY: FEBRUARY 19 , 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 12.9 169 30.5 16.2 188 Black Bear 8170 31.1 27.6 113 39.8 28.7 139 Blind Bull Sum 8650 33.3 16.7 199 -M 14.9 * Cottonwood Creek 7670 21.8 15.4 142 29.2 18.2 160 East Rim Divide 7930 15.7 7.5 209 17.5 8.8 199 Grand Targhee 9260 33.6 27.4 123 31.0 23.6 131 Granite Creek 6770 23.8 12.9 184 26.5 15.4 172 Grassy Lake 7265 29.5 24.6 120 42.1 27.7 152 Gros Ventre Summit 8750 -M 9.1 * -M 9.4 * Gunsight Pass 9820 15.9 9.8 162 19.1 10.2 187 Lewis Lake Divide 7850 29.6 23.9 124 41.0 27.0 152 Phillips Bench 8200 28.1 18.4 153 37.7 21.2 178 Salt River Summit 7760 17.0 9.7 175 22.7 12.5 182 Snake River Station 6920 17.6 13.5 130 28.6 17.6 162 Spring Creek Divide 9000 29.2 16.8 174 29.7 18.0 165 Thumb Divide 7980 17.7 11.0 161 21.3 13.7 155 Togwotee Pass 9580 25.0 16.7 150 29.0 18.1 160 Two Ocean Plateau 9240 -M 20.0 * -M 20.2 * Willow Creek 8380 26.6 20.2 132 37.9 24.9 152 Younts Peak 8350 20.0 11.1 180 23.6 11.9 198 ----- ----- Basin Index (%) 148 162 MADISON-GALLATIN Black Bear 8170 31.1 27.6 113 39.8 28.7 139 Canyon 7870 13.7 9.7 141 20.3 12.3 165 Madison Plateau 7750 19.6 16.3 120 28.0 19.6 143 West Yellowstone 6700 -M 8.0 * -M 11.0 * Whiskey Creek 6800 12.3 11.2 110 20.4 15.2 134 ----- ----- Basin Index (%) 118 143 YELLOWSTONE Beartooth Lake 9360 23.8 15.6 153 19.7 14.8 133 Burnt Mtn 5880 4.8 3.7 130 10.1 8.9 113 Canyon 7870 13.7 9.7 141 20.3 12.3 165 Cole Creek 7850 7.4 8.9 83 5.8 8.5 68 Evening Star 9200 27.8 18.1 154 -M 20.7 * Fisher Creek 9100 29.3 24.1 122 33.5 23.8 141 Northeast Entrance 7350 9.3 7.5 124 15.2 9.4 162 Parker Peak 9400 24.1 14.6 165 23.4 13.1 179 Sylvan Lake 8420 18.3 14.7 124 29.4 16.8 175 Thumb Divide 7980 17.7 11.0 161 21.3 13.7 155 Two Ocean Plateau 9240 -M 20.0 * -M 20.2 * White Mill 8700 22.9 16.8 136 24.9 17.8 140 Wolverine 7650 13.8 8.2 168 17.0 9.3 183 ----- ----- Basin Index (%) 139 149 WIND RIVER Burroughs Creek 8750 18.4 -M * 20.8 -M * Castle Creek 8400 10.0 -M * 12.2 -M * Cold Springs 9630 9.3 5.3 175 11.8 7.0 169 Deer Park 9700 23.2 10.1 230 26.9 14.2 189 Hobbs Park 10100 16.6 8.9 187 15.7 8.8 178 Kirwin 9550 14.1 6.3 224 17.2 8.2 210 Little Warm 9370 11.4 7.6 150 17.0 9.2 185 Owl Creek 8975 5.6 3.5 160 7.2 4.0 180 South Pass 9040 21.7 10.5 207 20.2 12.6 160 St. Lawrence Alt 8620 5.0 4.8 104 9.4 6.0 157 Togwotee Pass 9580 25.0 16.7 150 29.0 18.1 160 Townsend Creek 8700 8.7 6.0 145 11.9 8.1 147 ----- ----- Basin Index (%) 176 173 BIGHORN BASIN Bald Mtn. 9380 14.0 13.5 104 12.4 12.1 102 Bear Trap Meadow 8200 3.8 3.9 97 5.2 5.8 90 Bone Springs Div 9350 11.8 11.1 106 11.8 10.9 108 Grave Springs 8550 4.5 5.8 78 4.9 7.3 67 Kirwin 9550 14.1 6.3 224 17.2 8.2 210 Marquette 8760 6.2 -M * 9.8 -M * Middle Powder 7760 5.0 7.3 68 5.6 8.2 68 Owl Creek 8975 5.6 3.5 160 7.2 4.0 180 Powder River Pass 9480 5.0 7.4 68 8.0 8.9 90 Shell Creek 9580 11.7 10.4 112 9.3 9.8 95 Timber Creek 7950 4.4 3.1 142 5.8 4.9 118 ----- ----- Basin Index (%) 111 109 SHOSHONE RIVER Blackwater 9780 27.5 16.0 172 30.9 15.1 205 Evening Star 9200 27.8 18.1 154 -M 20.7 * Marquette 8760 6.2 -M * 9.8 -M * Sylvan Road 7120 13.0 8.8 148 24.2 13.2 183 Younts Peak 8350 20.0 11.1 180 23.6 11.9 198 ----- ----- Basin Index (%) 164 196 POWDER RIVER Bear Trap Meadow 8200 3.8 3.9 97 5.2 5.8 90 Cloud Peak Reservoir 9860 8.8 9.8 90 10.5 8.9 118 Grave Springs 8550 4.5 5.8 78 4.9 7.3 67 Hansen Sawmill 8360 6.1 4.4 139 7.9 5.6 141 Middle Powder 7760 5.0 7.3 68 5.6 8.2 68 Powder River Pass 9480 5.0 7.4 68 8.0 8.9 90 Soldier Park 8720 9.3 -M * 7.9 -M * ----- ----- Basin Index (%) 86 94 TONGUE RIVER Big Goose 7990 6.5 5.9 110 7.4 7.5 99 Bone Springs Div 9350 11.8 11.1 106 11.8 10.9 108 Burgess Junction 7880 7.0 7.6 92 8.2 8.5 96 Dome Lake 8880 8.2 8.0 102 9.5 9.4 101 Little Goose 8870 6.9 -M * 9.2 -M * Sucker Creek 8880 7.7 8.2 94 8.1 9.8 83 Tie Creek 6870 4.2 4.0 105 7.9 7.9 100 ----- ----- Basin Index (%) 101 98 BELLE FOURCHE Cole Canyon 5910 3.1 4.6 67 4.8 6.7 72 ----- ----- Basin Index (%) 67 72 CHEYENNE RIVER BASIN Blind Park 6890 4.5 5.8 78 5.9 8.8 67 North Rapid Creek 6130 4.4 5.5 80 5.2 7.2 72 ----- ----- Basin Index (%) 79 69 UPPER N. PLATTE Arapaho Ridge 10960 21.5 15.2 141 21.9 16.4 134 Blackhall Mtn 9820 30.2 -M * 29.9 -M * Columbine 9160 21.5 18.0 119 23.3 19.0 123 Divide Peak 8880 15.6 14.5 108 17.9 15.8 113 Joe Wright 10120 16.2 15.1 107 23.0 18.4 125 Laprele Creek 8375 9.2 6.9 133 8.6 8.7 99 Med Bow 10500 30.0 -M * 27.6 -M * North French Creek 10130 19.4 19.5 99 20.5 19.6 105 Never Summer 10280 18.8 14.5 130 15.5 -M * Old Battle 10000 30.0 22.6 133 31.3 26.2 119 Rawah 9020 10.9 7.6 143 13.7 10.1 136 Sage Creek Basin 7850 13.2 10.1 131 12.8 11.2 114 Sand Lake 10050 22.7 19.2 118 21.3 17.6 121 South Brush Creek 8440 8.4 8.9 94 9.6 10.8 89 Tower 10500 35.8 33.6 107 37.3 29.6 126 Webber Springs 9250 24.2 17.2 141 27.8 19.7 141 Willow Creek Pass 9540 15.1 8.8 172 16.0 9.5 168 Zirkel 9340 35.0 21.5 163 36.0 21.9 164 ----- ----- Basin Index (%) 125 126 SWEETWATER Deer Park 9700 23.2 10.1 230 26.9 14.2 189 Larsen Creek 9000 16.6 8.7 191 18.9 -M * South Pass 9040 21.7 10.5 207 20.2 12.6 160 ----- ----- Basin Index (%) 210 176 LOWER N. PLATTE Casper Mtn. 7900 7.8 9.3 84 7.6 10.4 73 Laprele Creek 8375 9.2 6.9 133 8.6 8.7 99 Reno Hill 8400 8.6 9.1 95 9.3 10.4 89 Windy Peak 7900 7.3 5.3 138 7.8 7.3 107 ----- ----- Basin Index (%) 108 90 LARAMIE RIVER Brooklyn Lake 10240 19.5 14.2 137 17.6 14.9 118 Cinnabar Park 9574 15.1 16.1 94 17.7 18.7 95 Crow Creek 8330 3.6 6.5 55 6.2 7.4 84 Deadman Hill 10220 16.4 11.7 140 15.9 11.8 135 Rawah 9020 10.9 7.6 143 13.7 10.1 136 Roach 9700 14.0 11.8 119 16.7 13.6 123 ----- ----- Basin Index (%) 117 115 S. PLATTE Black Mountain 8920 7.6 -M * 8.8 -M * Crow Creek 8330 3.6 6.5 55 6.2 7.4 84 Deadman Hill 10220 16.4 11.7 140 15.9 11.8 135 ----- ----- Basin Index (%) 110 115 LITTLE SNAKE RIVER Battle Mountain 7440 9.1 8.8 103 12.6 11.4 111 Divide Peak 8880 15.6 14.5 108 17.9 15.8 113 Elk River 8700 17.0 14.0 121 16.8 14.9 113 Little Snake River 8915 26.6 18.7 142 32.2 24.0 134 Old Battle 10000 30.0 22.6 133 31.3 26.2 119 Sage Creek Basin 7850 13.2 10.1 131 12.8 11.2 114 Sandstone RS 8150 10.7 10.1 106 13.0 14.0 93 Whiskey Park 8950 22.6 19.7 115 24.0 21.0 114 ----- ----- Basin Index (%) 122 116 UPPER GREEN RIVER Big Sandy Opening 9080 17.6 9.2 191 19.5 9.7 201 Blind Bull Sum 8650 33.3 16.7 199 -M 14.9 * East Rim Divide 7930 15.7 7.5 209 17.5 8.8 199 Elkhart Park G.S. 9400 14.5 8.8 165 19.3 9.7 199 Gros Ventre Summit 8750 -M 9.1 * -M 9.4 * Gunsight Pass 9820 15.9 9.8 162 19.1 10.2 187 Kendall R.S. 7740 18.7 9.1 205 22.9 10.8 212 Loomis Park 8240 22.0 10.8 204 26.3 13.0 202 New Fork Lake 8340 14.0 7.6 184 14.3 8.1 177 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 16.2 9.1 178 21.7 10.7 203 Spring Creek Divide 9000 29.2 16.8 174 29.7 18.0 165 Triple Peak 8500 30.0 15.7 191 31.3 18.6 168 ----- ----- Basin Index (%) 188 188 LOWER GREEN RIVER Blacks Fork Jct 8869 8.8 -M * 11.4 -M * Buck Pasture 9632 15.2 -M * 17.6 -M * EF Blacks Fork GS 9360 12.3 -M * 9.8 -M * Hams Fork 7840 14.3 8.5 168 16.2 8.5 191 Hewinta 9519 9.7 7.1 137 11.7 10.0 117 Hickerson Park 9145 6.5 5.2 125 6.8 7.0 97 Hole-in-Rock 9150 5.3 4.9 108 7.3 6.6 111 Indian Creek 9425 29.4 17.0 173 -M 16.5 * Kelley R.S. 8180 20.9 10.9 192 24.4 13.5 181 Spirit Lk 10235 11.4 -M * 12.4 -M * Steel Creek Park 10200 12.5 10.4 120 14.3 11.5 124 ----- ----- Basin Index (%) 154 141 UPPER BEAR RIVER Bear River RS 8777 10.5 -M * 13.0 -M * Bug Lake 7950 -M 13.6 * -M 14.5 * Burts Miller Ranch 8000 5.7 -M * 6.7 -M * Chalk Creek #1 8993 26.0 16.5 158 27.1 18.2 149 Hayden Fork 9212 18.0 11.2 161 22.8 15.2 150 Kelley R.S. 8180 20.9 10.9 192 24.4 13.5 181 Lily Lake 9156 12.4 9.3 133 13.8 12.4 111 Monte Cristo 8960 27.0 19.3 140 25.8 19.0 136 Salt River Summit 7760 17.0 9.7 175 22.7 12.5 182 ----- ----- Basin Index (%) 158 150 ----------------------------------------------------------------------------- -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.