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 16 , 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 12.7 172 29.4 15.6 188 Black Bear 8170 29.9 27.2 110 38.9 27.9 139 Blind Bull Sum 8650 32.7 16.1 203 -M 14.5 * Cottonwood Creek 7670 21.4 14.8 145 28.3 17.7 160 East Rim Divide 7930 15.4 7.3 211 17.2 8.5 202 Grand Targhee 9260 32.9 26.6 124 31.0 23.3 133 Granite Creek 6770 23.0 12.4 185 26.3 15.1 174 Grassy Lake 7265 29.2 24.1 121 41.6 27.0 154 Gros Ventre Summit 8750 -M 8.9 * -M 9.1 * Gunsight Pass 9820 15.7 9.5 165 18.9 10.0 189 Lewis Lake Divide 7850 29.1 23.2 125 39.7 26.1 152 Phillips Bench 8200 26.2 17.9 146 36.0 20.5 176 Salt River Summit 7760 16.9 9.3 182 22.5 12.1 186 Snake River Station 6920 17.4 13.1 133 28.7 17.2 167 Spring Creek Divide 9000 28.7 16.4 175 29.6 17.4 170 Thumb Divide 7980 17.0 10.7 159 21.0 13.3 158 Togwotee Pass 9580 24.6 16.5 149 28.6 17.7 162 Two Ocean Plateau 9240 -M 19.5 * -M 19.6 * Willow Creek 8380 26.7 19.6 136 36.5 24.2 151 Younts Peak 8350 19.6 10.9 180 23.4 11.6 202 ----- ----- Basin Index (%) 149 163 MADISON-GALLATIN Black Bear 8170 29.9 27.2 110 38.9 27.9 139 Canyon 7870 13.6 9.4 145 20.3 12.0 169 Madison Plateau 7750 18.8 15.7 120 27.4 19.1 143 West Yellowstone 6700 10.0 7.7 130 18.0 10.7 168 Whiskey Creek 6800 11.8 10.8 109 20.2 14.8 136 ----- ----- Basin Index (%) 119 148 YELLOWSTONE Beartooth Lake 9360 23.7 15.4 154 19.6 14.4 136 Burnt Mtn 5880 4.9 3.5 140 10.1 8.7 116 Canyon 7870 13.6 9.4 145 20.3 12.0 169 Cole Creek 7850 7.5 8.9 84 5.8 8.4 69 Evening Star 9200 27.7 17.7 156 30.0 20.2 149 Fisher Creek 9100 29.1 23.3 125 33.5 23.2 144 Northeast Entrance 7350 9.1 7.4 123 15.0 9.2 163 Parker Peak 9400 23.9 14.1 170 23.1 12.7 182 Sylvan Lake 8420 18.1 14.2 127 29.1 16.4 177 Thumb Divide 7980 17.0 10.7 159 21.0 13.3 158 Two Ocean Plateau 9240 -M 19.5 * -M 19.6 * White Mill 8700 22.6 16.3 139 24.8 17.3 143 Wolverine 7650 13.9 7.9 176 16.9 9.1 186 ----- ----- Basin Index (%) 142 151 WIND RIVER Burroughs Creek 8750 18.5 -M * 20.8 -M * Castle Creek 8400 10.0 -M * 12.1 -M * Cold Springs 9630 9.3 5.1 182 11.7 6.8 172 Deer Park 9700 22.9 9.8 234 26.5 14.0 189 Hobbs Park 10100 16.3 8.6 190 15.7 8.6 183 Kirwin 9550 14.0 6.2 226 17.2 8.0 215 Little Warm 9370 11.3 7.3 155 17.0 9.0 189 Owl Creek 8975 5.7 3.3 173 7.2 3.9 185 South Pass 9040 21.4 10.2 210 20.1 12.2 165 St. Lawrence Alt 8620 5.1 4.6 111 9.4 5.9 159 Togwotee Pass 9580 24.6 16.5 149 28.6 17.7 162 Townsend Creek 8700 8.5 5.8 147 11.8 7.9 149 ----- ----- Basin Index (%) 180 176 BIGHORN BASIN Bald Mtn. 9380 13.9 13.0 107 12.4 11.8 105 Bear Trap Meadow 8200 3.8 3.8 100 5.1 5.6 91 Bone Springs Div 9350 11.7 10.8 108 11.7 10.6 110 Grave Springs 8550 4.2 5.6 75 4.9 7.2 68 Kirwin 9550 14.0 6.2 226 17.2 8.0 215 Marquette 8760 6.3 -M * 10.0 -M * Middle Powder 7760 5.1 7.1 72 5.6 8.0 70 Owl Creek 8975 5.7 3.3 173 7.2 3.9 185 Powder River Pass 9480 4.8 7.2 67 7.9 8.7 91 Shell Creek 9580 11.6 10.1 115 9.2 9.7 95 Timber Creek 7950 4.5 3.1 145 5.8 4.8 121 ----- ----- Basin Index (%) 113 111 SHOSHONE RIVER Blackwater 9780 27.6 15.6 177 30.8 14.7 210 Evening Star 9200 27.7 17.7 156 30.0 20.2 149 Marquette 8760 6.3 -M * 10.0 -M * Sylvan Road 7120 13.3 8.7 153 24.4 13.0 188 Younts Peak 8350 19.6 10.9 180 23.4 11.6 202 ----- ----- Basin Index (%) 167 183 POWDER RIVER Bear Trap Meadow 8200 3.8 3.8 100 5.1 5.6 91 Cloud Peak Reservoir 9860 8.7 9.6 91 10.5 8.7 121 Grave Springs 8550 4.2 5.6 75 4.9 7.2 68 Hansen Sawmill 8360 6.1 4.3 142 7.9 5.5 144 Middle Powder 7760 5.1 7.1 72 5.6 8.0 70 Powder River Pass 9480 4.8 7.2 67 7.9 8.7 91 Soldier Park 8720 9.3 -M * 7.8 -M * ----- ----- Basin Index (%) 87 96 TONGUE RIVER Big Goose 7990 6.5 5.7 114 7.4 7.3 101 Bone Springs Div 9350 11.7 10.8 108 11.7 10.6 110 Burgess Junction 7880 7.0 7.4 95 8.1 8.2 99 Dome Lake 8880 8.2 7.8 105 9.5 9.2 103 Little Goose 8870 6.9 -M * 9.2 -M * Sucker Creek 8880 7.8 8.0 98 8.0 9.6 83 Tie Creek 6870 4.4 3.9 113 8.0 7.8 103 ----- ----- Basin Index (%) 105 100 BELLE FOURCHE Cole Canyon 5910 3.2 4.5 71 4.8 6.5 74 ----- ----- Basin Index (%) 71 74 CHEYENNE RIVER BASIN Blind Park 6890 4.6 5.6 82 5.9 8.5 69 North Rapid Creek 6130 4.4 5.3 83 5.3 7.0 76 ----- ----- Basin Index (%) 83 72 UPPER N. PLATTE Arapaho Ridge 10960 21.4 14.7 146 21.9 16.1 136 Blackhall Mtn 9820 30.0 -M * 29.6 -M * Columbine 9160 21.6 17.3 125 23.1 18.5 125 Divide Peak 8880 15.4 14.0 110 17.9 15.4 116 Joe Wright 10120 16.2 14.6 111 23.0 18.0 128 Laprele Creek 8375 9.1 6.6 138 8.5 8.4 101 Med Bow 10500 29.8 -M * 27.7 -M * North French Creek 10130 19.2 19.1 101 20.4 19.0 107 Never Summer 10280 18.6 14.1 132 15.4 -M * Old Battle 10000 29.8 22.0 135 31.2 25.5 122 Rawah 9020 11.0 7.4 149 13.6 9.9 137 Sage Creek Basin 7850 12.8 9.6 133 12.8 10.9 117 Sand Lake 10050 22.4 18.5 121 21.2 17.0 125 South Brush Creek 8440 8.4 8.4 100 9.3 10.6 88 Tower 10500 35.6 32.4 110 37.1 28.8 129 Webber Springs 9250 23.6 16.6 142 27.6 19.1 145 Willow Creek Pass 9540 15.1 8.5 178 15.9 9.3 171 Zirkel 9340 34.6 20.8 166 36.0 21.3 169 ----- ----- Basin Index (%) 129 129 SWEETWATER Deer Park 9700 22.9 9.8 234 26.5 14.0 189 Larsen Creek 9000 16.2 8.5 191 18.7 -M * South Pass 9040 21.4 10.2 210 20.1 12.2 165 ----- ----- Basin Index (%) 212 178 LOWER N. PLATTE Casper Mtn. 7900 7.7 8.8 88 7.5 10.1 74 Laprele Creek 8375 9.1 6.6 138 8.5 8.4 101 Reno Hill 8400 8.6 8.8 98 9.1 10.1 90 Windy Peak 7900 7.2 5.1 141 7.7 7.1 108 ----- ----- Basin Index (%) 111 92 LARAMIE RIVER Brooklyn Lake 10240 19.4 13.8 141 17.5 14.5 121 Cinnabar Park 9574 15.0 15.8 95 17.7 18.1 98 Crow Creek 8330 3.8 6.3 60 6.1 7.1 86 Deadman Hill 10220 16.4 11.4 144 15.9 11.5 138 Rawah 9020 11.0 7.4 149 13.6 9.9 137 Roach 9700 14.1 11.5 123 16.6 13.3 125 ----- ----- Basin Index (%) 120 117 S. PLATTE Black Mountain 8920 7.6 -M * 8.8 -M * Crow Creek 8330 3.8 6.3 60 6.1 7.1 86 Deadman Hill 10220 16.4 11.4 144 15.9 11.5 138 ----- ----- Basin Index (%) 114 118 LITTLE SNAKE RIVER Battle Mountain 7440 9.3 8.6 108 12.5 11.0 114 Divide Peak 8880 15.4 14.0 110 17.9 15.4 116 Elk River 8700 16.7 13.7 122 16.8 14.5 116 Little Snake River 8915 26.4 18.2 145 32.1 23.1 139 Old Battle 10000 29.8 22.0 135 31.2 25.5 122 Sage Creek Basin 7850 12.8 9.6 133 12.8 10.9 117 Sandstone RS 8150 10.8 9.8 110 12.9 13.6 95 Whiskey Park 8950 21.9 19.1 115 24.0 20.4 118 ----- ----- Basin Index (%) 124 119 UPPER GREEN RIVER Big Sandy Opening 9080 17.1 9.0 190 19.2 9.3 206 Blind Bull Sum 8650 32.7 16.1 203 -M 14.5 * East Rim Divide 7930 15.4 7.3 211 17.2 8.5 202 Elkhart Park G.S. 9400 14.1 8.5 166 19.1 9.4 203 Gros Ventre Summit 8750 -M 8.9 * -M 9.1 * Gunsight Pass 9820 15.7 9.5 165 18.9 10.0 189 Kendall R.S. 7740 18.4 8.9 207 22.8 10.4 219 Loomis Park 8240 21.6 10.5 206 26.0 12.6 206 New Fork Lake 8340 13.9 7.5 185 14.2 7.8 182 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 15.8 8.9 178 21.6 10.4 208 Spring Creek Divide 9000 28.7 16.4 175 29.6 17.4 170 Triple Peak 8500 30.2 15.4 196 31.1 18.0 173 ----- ----- Basin Index (%) 189 193 LOWER GREEN RIVER Blacks Fork Jct 8869 8.8 -M * 11.4 -M * Buck Pasture 9632 15.0 -M * 17.9 -M * EF Blacks Fork GS 9360 12.6 -M * 9.9 -M * Hams Fork 7840 14.1 8.3 170 16.0 8.2 195 Hewinta 9519 9.9 6.9 143 11.5 9.8 117 Hickerson Park 9145 6.5 5.0 130 6.5 6.9 94 Hole-in-Rock 9150 5.2 4.7 111 7.1 6.4 111 Indian Creek 9425 28.9 16.5 175 -M 16.0 * Kelley R.S. 8180 20.4 10.5 194 24.1 13.1 184 Spirit Lk 10235 10.7 -M * 12.2 -M * Steel Creek Park 10200 12.4 10.2 122 14.4 11.2 129 ----- ----- Basin Index (%) 157 143 UPPER BEAR RIVER Bear River RS 8777 10.8 -M * 13.0 -M * Bug Lake 7950 26.0 13.1 198 24.3 13.9 175 Burts Miller Ranch 8000 5.5 -M * 6.8 -M * Chalk Creek #1 8993 25.7 15.9 162 27.0 17.6 153 Hayden Fork 9212 18.0 10.8 167 -M 14.8 * Kelley R.S. 8180 20.4 10.5 194 24.1 13.1 184 Lily Lake 9156 12.5 8.9 140 14.3 12.0 119 Monte Cristo 8960 26.4 18.7 141 25.0 18.3 137 Salt River Summit 7760 16.9 9.3 182 22.5 12.1 186 ----- ----- Basin Index (%) 167 158 ----------------------------------------------------------------------------- -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.