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 SATURDAY: FEBRUARY 18 , 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 30.3 16.0 189 Black Bear 8170 30.4 27.5 111 39.2 28.4 138 Blind Bull Sum 8650 33.0 16.5 200 -M 14.8 * Cottonwood Creek 7670 21.6 15.2 142 29.0 18.1 160 East Rim Divide 7930 15.6 7.4 211 17.4 8.7 200 Grand Targhee 9260 33.1 27.2 122 30.8 23.5 131 Granite Creek 6770 23.3 12.8 182 26.5 15.3 173 Grassy Lake 7265 29.4 24.5 120 42.0 27.5 153 Gros Ventre Summit 8750 14.1 9.1 155 18.4 9.3 198 Gunsight Pass 9820 15.8 9.8 161 19.0 10.1 188 Lewis Lake Divide 7850 29.3 23.7 124 41.0 26.7 154 Phillips Bench 8200 26.9 18.2 148 36.6 21.0 174 Salt River Summit 7760 16.9 9.6 176 22.6 12.3 184 Snake River Station 6920 17.5 13.4 131 28.5 17.5 163 Spring Creek Divide 9000 28.8 16.6 173 29.6 17.8 166 Thumb Divide 7980 17.2 11.0 156 21.0 13.6 154 Togwotee Pass 9580 24.8 16.7 149 28.6 18.0 159 Two Ocean Plateau 9240 -M 19.8 * -M 20.0 * Willow Creek 8380 26.7 20.0 134 37.5 24.6 152 Younts Peak 8350 19.9 11.1 179 23.5 11.8 199 ----- ----- Basin Index (%) 147 163 MADISON-GALLATIN Black Bear 8170 30.4 27.5 111 39.2 28.4 138 Canyon 7870 13.6 9.6 142 20.3 12.2 166 Madison Plateau 7750 19.0 16.1 118 27.6 19.4 142 West Yellowstone 6700 10.2 7.9 129 18.2 10.9 167 Whiskey Creek 6800 12.1 11.1 109 20.3 15.0 135 ----- ----- Basin Index (%) 118 146 YELLOWSTONE Beartooth Lake 9360 23.7 15.5 153 19.6 14.6 134 Burnt Mtn 5880 4.9 3.7 132 10.1 8.9 113 Canyon 7870 13.6 9.6 142 20.3 12.2 166 Cole Creek 7850 7.4 8.9 83 5.7 8.5 67 Evening Star 9200 27.6 18.0 153 -M 20.5 * Fisher Creek 9100 29.1 23.9 122 33.5 23.6 142 Northeast Entrance 7350 9.2 7.5 123 15.1 9.3 162 Parker Peak 9400 24.0 14.4 167 23.4 12.9 181 Sylvan Lake 8420 18.1 14.6 124 29.2 16.7 175 Thumb Divide 7980 17.2 11.0 156 21.0 13.6 154 Two Ocean Plateau 9240 -M 19.8 * -M 20.0 * White Mill 8700 22.7 16.6 137 24.9 17.7 141 Wolverine 7650 13.8 8.1 170 16.9 9.3 182 ----- ----- Basin Index (%) 139 149 WIND RIVER Burroughs Creek 8750 18.4 -M * 20.8 -M * Castle Creek 8400 10.0 -M * 12.3 -M * Cold Springs 9630 9.3 5.3 175 11.8 6.9 171 Deer Park 9700 23.3 10.0 233 26.4 14.1 187 Hobbs Park 10100 16.7 8.8 190 15.6 8.8 177 Kirwin 9550 14.1 6.2 227 17.1 8.1 211 Little Warm 9370 11.4 7.5 152 17.0 9.1 187 Owl Creek 8975 5.6 3.4 165 7.2 4.0 180 South Pass 9040 21.7 10.4 209 20.2 12.5 162 St. Lawrence Alt 8620 5.0 4.7 106 9.4 6.0 157 Togwotee Pass 9580 24.8 16.7 149 28.6 18.0 159 Townsend Creek 8700 8.6 5.9 146 11.9 8.1 147 ----- ----- Basin Index (%) 178 173 BIGHORN BASIN Bald Mtn. 9380 13.9 13.3 105 12.3 12.0 102 Bear Trap Meadow 8200 3.9 3.9 100 5.2 5.7 91 Bone Springs Div 9350 11.7 11.0 106 11.8 10.8 109 Grave Springs 8550 4.5 5.7 79 4.9 7.3 67 Kirwin 9550 14.1 6.2 227 17.1 8.1 211 Marquette 8760 6.2 -M * 9.9 -M * Middle Powder 7760 5.0 7.2 69 5.6 8.2 68 Owl Creek 8975 5.6 3.4 165 7.2 4.0 180 Powder River Pass 9480 5.0 7.3 68 8.0 8.8 91 Shell Creek 9580 11.6 10.3 113 9.2 9.8 94 Timber Creek 7950 4.4 3.1 142 5.8 4.9 118 ----- ----- Basin Index (%) 112 109 SHOSHONE RIVER Blackwater 9780 27.4 15.9 172 30.9 15.0 206 Evening Star 9200 27.6 18.0 153 -M 20.5 * Marquette 8760 6.2 -M * 9.9 -M * Sylvan Road 7120 13.2 8.7 152 24.3 13.1 185 Younts Peak 8350 19.9 11.1 179 23.5 11.8 199 ----- ----- Basin Index (%) 164 197 POWDER RIVER Bear Trap Meadow 8200 3.9 3.9 100 5.2 5.7 91 Cloud Peak Reservoir 9860 8.7 9.7 90 10.5 8.8 119 Grave Springs 8550 4.5 5.7 79 4.9 7.3 67 Hansen Sawmill 8360 6.0 4.4 136 7.9 5.6 141 Middle Powder 7760 5.0 7.2 69 5.6 8.2 68 Powder River Pass 9480 5.0 7.3 68 8.0 8.8 91 Soldier Park 8720 9.2 -M * 7.8 -M * ----- ----- Basin Index (%) 87 95 TONGUE RIVER Big Goose 7990 6.4 5.8 110 7.4 7.4 100 Bone Springs Div 9350 11.7 11.0 106 11.8 10.8 109 Burgess Junction 7880 7.0 7.5 93 8.1 8.4 96 Dome Lake 8880 8.1 7.9 103 9.5 9.3 102 Little Goose 8870 6.9 -M * 9.2 -M * Sucker Creek 8880 7.7 8.1 95 8.0 9.8 82 Tie Creek 6870 4.2 4.0 105 7.9 7.9 100 ----- ----- Basin Index (%) 102 98 BELLE FOURCHE Cole Canyon 5910 3.1 4.6 67 4.7 6.7 70 ----- ----- Basin Index (%) 67 70 CHEYENNE RIVER BASIN Blind Park 6890 4.5 5.7 79 5.9 8.8 67 North Rapid Creek 6130 4.4 5.4 81 5.2 7.1 73 ----- ----- Basin Index (%) 80 70 UPPER N. PLATTE Arapaho Ridge 10960 21.5 15.1 142 21.9 16.3 134 Blackhall Mtn 9820 30.1 -M * 29.8 -M * Columbine 9160 21.6 17.8 121 23.4 18.8 124 Divide Peak 8880 15.6 14.3 109 17.9 15.7 114 Joe Wright 10120 16.2 15.0 108 23.0 18.3 126 Laprele Creek 8375 9.2 6.8 135 8.6 8.6 100 Med Bow 10500 30.0 -M * 27.6 -M * North French Creek 10130 19.3 19.4 99 20.5 19.4 106 Never Summer 10280 18.7 14.4 130 15.5 -M * Old Battle 10000 29.9 22.4 133 31.2 25.9 120 Rawah 9020 11.0 7.5 147 13.7 10.0 137 Sage Creek Basin 7850 12.8 10.0 128 12.8 11.1 115 Sand Lake 10050 22.6 19.0 119 21.3 17.4 122 South Brush Creek 8440 8.3 8.8 94 9.6 10.7 90 Tower 10500 35.7 33.2 108 37.4 29.3 128 Webber Springs 9250 23.9 17.0 141 27.7 19.5 142 Willow Creek Pass 9540 15.1 8.7 174 16.0 9.5 168 Zirkel 9340 34.8 21.3 163 35.9 21.7 165 ----- ----- Basin Index (%) 126 127 SWEETWATER Deer Park 9700 23.3 10.0 233 26.4 14.1 187 Larsen Creek 9000 16.5 8.6 192 18.9 -M * South Pass 9040 21.7 10.4 209 20.2 12.5 162 ----- ----- Basin Index (%) 212 175 LOWER N. PLATTE Casper Mtn. 7900 7.7 9.2 84 7.6 10.3 74 Laprele Creek 8375 9.2 6.8 135 8.6 8.6 100 Reno Hill 8400 8.6 9.0 96 9.2 10.3 89 Windy Peak 7900 7.2 5.2 138 7.8 7.3 107 ----- ----- Basin Index (%) 108 91 LARAMIE RIVER Brooklyn Lake 10240 19.5 14.1 138 17.6 14.8 119 Cinnabar Park 9574 15.0 16.0 94 17.7 18.5 96 Crow Creek 8330 3.6 6.5 55 6.2 7.3 85 Deadman Hill 10220 16.4 11.6 141 15.9 11.7 136 Rawah 9020 11.0 7.5 147 13.7 10.0 137 Roach 9700 14.0 11.7 120 16.6 13.5 123 ----- ----- Basin Index (%) 118 116 S. PLATTE Black Mountain 8920 7.6 -M * 8.8 -M * Crow Creek 8330 3.6 6.5 55 6.2 7.3 85 Deadman Hill 10220 16.4 11.6 141 15.9 11.7 136 ----- ----- Basin Index (%) 110 116 LITTLE SNAKE RIVER Battle Mountain 7440 8.8 8.8 100 12.7 11.2 113 Divide Peak 8880 15.6 14.3 109 17.9 15.7 114 Elk River 8700 16.9 13.9 122 16.8 14.8 114 Little Snake River 8915 26.4 18.5 143 32.1 23.5 137 Old Battle 10000 29.9 22.4 133 31.2 25.9 120 Sage Creek Basin 7850 12.8 10.0 128 12.8 11.1 115 Sandstone RS 8150 10.7 10.0 107 13.0 13.9 94 Whiskey Park 8950 22.4 19.5 115 24.0 20.8 115 ----- ----- Basin Index (%) 122 117 UPPER GREEN RIVER Big Sandy Opening 9080 17.5 9.1 192 19.4 9.6 202 Blind Bull Sum 8650 33.0 16.5 200 -M 14.8 * East Rim Divide 7930 15.6 7.4 211 17.4 8.7 200 Elkhart Park G.S. 9400 14.3 8.7 164 19.0 9.6 198 Gros Ventre Summit 8750 14.1 9.1 155 18.4 9.3 198 Gunsight Pass 9820 15.8 9.8 161 19.0 10.1 188 Kendall R.S. 7740 18.7 9.1 205 22.7 10.6 214 Loomis Park 8240 21.8 10.7 204 26.1 12.9 202 New Fork Lake 8340 14.0 7.6 184 14.3 8.0 179 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 16.0 9.1 176 21.6 10.6 204 Spring Creek Divide 9000 28.8 16.6 173 29.6 17.8 166 Triple Peak 8500 30.0 15.6 192 31.2 18.3 170 ----- ----- Basin Index (%) 185 190 LOWER GREEN RIVER Blacks Fork Jct 8869 8.8 -M * 11.4 -M * Buck Pasture 9632 15.2 -M * 17.5 -M * EF Blacks Fork GS 9360 12.4 -M * -M -M * Hams Fork 7840 14.1 8.5 166 16.1 8.4 192 Hewinta 9519 9.8 7.0 140 11.7 9.9 118 Hickerson Park 9145 6.5 5.2 125 6.8 7.0 97 Hole-in-Rock 9150 5.3 4.8 110 7.3 6.6 111 Indian Creek 9425 29.1 16.8 173 -M 16.4 * Kelley R.S. 8180 20.8 10.8 193 24.2 13.4 181 Spirit Lk 10235 10.8 -M * 12.1 -M * Steel Creek Park 10200 12.6 10.4 121 14.2 11.4 125 ----- ----- Basin Index (%) 155 142 UPPER BEAR RIVER Bear River RS 8777 10.5 -M * 12.9 -M * Bug Lake 7950 25.5 13.4 190 24.5 14.3 171 Burts Miller Ranch 8000 5.5 -M * 6.7 -M * Chalk Creek #1 8993 26.0 16.3 160 27.0 18.0 150 Hayden Fork 9212 17.8 11.2 159 22.7 15.1 150 Kelley R.S. 8180 20.8 10.8 193 24.2 13.4 181 Lily Lake 9156 12.5 9.2 136 14.4 12.2 118 Monte Cristo 8960 26.8 19.1 140 25.6 18.8 136 Salt River Summit 7760 16.9 9.6 176 22.6 12.3 184 ----- ----- Basin Index (%) 163 155 ----------------------------------------------------------------------------- -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.