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 FRIDAY: JANUARY 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 15.4 9.9 156 23.2 12.5 186 Black Bear 8170 21.6 21.6 100 30.8 22.1 139 Blind Bull Sum 8650 21.7 12.6 172 -M 11.6 * Cottonwood Creek 7670 14.9 11.1 134 21.1 14.3 148 East Rim Divide 7930 10.3 6.0 172 12.6 7.0 180 Grand Targhee 9260 27.5 21.4 129 25.6 18.4 139 Granite Creek 6770 15.0 9.1 165 20.7 12.1 171 Grassy Lake 7265 22.4 17.4 129 33.8 21.3 159 Gros Ventre Summit 8750 9.4 7.6 124 13.7 7.5 183 Gunsight Pass 9820 10.2 7.7 132 14.2 8.0 178 Lewis Lake Divide 7850 19.4 17.2 113 31.1 20.8 150 Phillips Bench 8200 17.5 15.5 113 26.5 16.3 163 Salt River Summit 7760 11.2 6.8 165 16.5 9.6 172 Snake River Station 6920 14.0 9.3 151 22.0 13.8 159 Spring Creek Divide 9000 19.3 12.6 153 22.6 13.9 163 Thumb Divide 7980 10.2 8.3 123 15.6 10.9 143 Togwotee Pass 9580 17.6 13.2 133 21.4 14.4 149 Two Ocean Plateau 9240 -M 15.7 * -M 15.7 * Willow Creek 8380 18.5 15.0 123 27.8 19.5 143 Younts Peak 8350 12.4 8.7 143 16.8 9.6 175 ----- ----- Basin Index (%) 134 157 MADISON-GALLATIN Black Bear 8170 21.6 21.6 100 30.8 22.1 139 Canyon 7870 9.1 7.5 121 15.5 9.6 161 Madison Plateau 7750 12.9 13.1 98 22.2 15.5 143 West Yellowstone 6700 7.4 6.5 114 14.8 8.6 172 Whiskey Creek 6800 8.4 8.7 97 16.3 12.0 136 ----- ----- Basin Index (%) 103 147 YELLOWSTONE Beartooth Lake 9360 15.3 12.7 120 11.8 11.5 103 Burnt Mtn 5880 4.5 2.3 196 8.4 7.4 114 Canyon 7870 9.1 7.5 121 15.5 9.6 161 Cole Creek 7850 6.1 7.5 81 5.3 7.2 74 Evening Star 9200 18.3 14.3 128 24.6 16.3 151 Fisher Creek 9100 18.0 19.0 95 23.0 18.6 124 Northeast Entrance 7350 6.4 5.6 114 11.6 7.5 155 Parker Peak 9400 16.2 11.9 136 19.0 10.4 183 Sylvan Lake 8420 12.5 11.5 109 23.1 13.5 171 Thumb Divide 7980 10.2 8.3 123 15.6 10.9 143 Two Ocean Plateau 9240 -M 15.7 * -M 15.7 * White Mill 8700 14.9 13.3 112 18.0 13.9 129 Wolverine 7650 -M 6.2 * -M 7.5 * ----- ----- Basin Index (%) 115 139 WIND RIVER Burroughs Creek 8750 11.8 -M * 14.6 -M * Castle Creek 8400 6.7 -M * 8.8 -M * Cold Springs 9630 6.0 4.2 143 8.6 5.8 148 Deer Park 9700 17.3 7.7 225 20.8 11.3 184 Hobbs Park 10100 12.0 7.4 162 12.0 7.2 167 Kirwin 9550 9.6 5.3 181 12.7 6.7 190 Little Warm 9370 6.6 5.8 114 11.8 7.4 159 Owl Creek 8975 3.5 3.0 117 5.2 3.3 158 South Pass 9040 16.5 8.0 206 16.2 10.0 162 St. Lawrence Alt 8620 3.3 3.6 92 7.2 5.0 144 Togwotee Pass 9580 17.6 13.2 133 21.4 14.4 149 Townsend Creek 8700 6.4 4.5 142 9.3 6.6 141 ----- ----- Basin Index (%) 158 161 BIGHORN BASIN Bald Mtn. 9380 11.8 10.0 118 10.6 9.8 108 Bear Trap Meadow 8200 2.9 3.0 97 4.5 4.8 94 Bone Springs Div 9350 9.1 9.0 101 9.8 8.7 113 Grave Springs 8550 3.4 4.5 76 4.6 6.0 77 Kirwin 9550 9.6 5.3 181 12.7 6.7 190 Marquette 8760 4.6 -M * 7.9 -M * Middle Powder 7760 4.2 6.1 69 5.1 6.9 74 Owl Creek 8975 3.5 3.0 117 5.2 3.3 158 Powder River Pass 9480 3.4 5.9 58 6.6 7.2 92 Shell Creek 9580 9.8 8.6 114 8.1 8.0 101 Timber Creek 7950 3.4 2.8 121 4.7 4.3 109 ----- ----- Basin Index (%) 105 109 SHOSHONE RIVER Blackwater 9780 19.1 13.1 146 22.8 12.1 188 Evening Star 9200 18.3 14.3 128 24.6 16.3 151 Marquette 8760 4.6 -M * 7.9 -M * Sylvan Road 7120 9.2 7.1 130 19.3 10.9 177 Younts Peak 8350 12.4 8.7 143 16.8 9.6 175 ----- ----- Basin Index (%) 137 171 POWDER RIVER Bear Trap Meadow 8200 2.9 3.0 97 4.5 4.8 94 Cloud Peak Reservoir 9860 6.9 7.6 91 9.0 7.3 123 Grave Springs 8550 3.4 4.5 76 4.6 6.0 77 Hansen Sawmill 8360 4.4 3.6 122 6.2 4.6 135 Middle Powder 7760 4.2 6.1 69 5.1 6.9 74 Powder River Pass 9480 3.4 5.9 58 6.6 7.2 92 Soldier Park 8720 7.1 -M * 6.5 -M * ----- ----- Basin Index (%) 82 98 TONGUE RIVER Big Goose 7990 5.0 4.4 114 6.1 6.0 102 Bone Springs Div 9350 9.1 9.0 101 9.8 8.7 113 Burgess Junction 7880 5.2 6.1 85 6.7 6.9 97 Dome Lake 8880 6.3 6.4 98 7.8 7.7 101 Little Goose 8870 5.4 -M * 7.6 -M * Sucker Creek 8880 6.1 6.5 94 6.8 8.0 85 Tie Creek 6870 3.7 3.0 123 6.8 6.6 103 ----- ----- Basin Index (%) 100 100 BELLE FOURCHE Cole Canyon 5910 3.1 2.9 107 4.2 5.3 79 ----- ----- Basin Index (%) 107 79 CHEYENNE RIVER BASIN Blind Park 6890 3.7 4.1 90 4.8 7.2 67 North Rapid Creek 6130 4.0 3.8 105 4.3 5.8 74 ----- ----- Basin Index (%) 97 70 UPPER N. PLATTE Arapaho Ridge 10960 17.9 11.2 160 18.7 12.9 145 Blackhall Mtn 9820 23.4 -M * 24.6 -M * Columbine 9160 17.7 12.9 137 19.7 14.6 135 Divide Peak 8880 12.0 11.0 109 14.5 12.5 116 Joe Wright 10120 13.9 11.9 117 19.2 14.6 132 Laprele Creek 8375 6.4 5.2 123 6.2 6.9 90 Med Bow 10500 24.6 -M * 23.4 -M * North French Creek 10130 15.4 14.4 107 17.0 15.2 112 Never Summer 10280 -M 10.9 * -M -M * Old Battle 10000 22.7 16.3 139 24.8 20.3 122 Rawah 9020 9.3 5.6 166 11.9 8.6 138 Sage Creek Basin 7850 9.8 7.4 132 10.3 8.8 117 Sand Lake 10050 18.2 14.8 123 17.7 13.7 129 South Brush Creek 8440 6.5 6.4 102 7.9 8.7 91 Tower 10500 27.7 23.9 116 30.6 23.0 133 Webber Springs 9250 18.1 12.2 148 21.9 15.4 142 Willow Creek Pass 9540 12.5 6.5 192 12.7 7.6 167 Zirkel 9340 25.7 16.1 160 26.5 16.9 157 ----- ----- Basin Index (%) 133 130 SWEETWATER Deer Park 9700 17.3 7.7 225 20.8 11.3 184 Larsen Creek 9000 11.5 6.4 180 15.0 -M * South Pass 9040 16.5 8.0 206 16.2 10.0 162 ----- ----- Basin Index (%) 205 174 LOWER N. PLATTE Casper Mtn. 7900 5.9 6.9 86 6.2 8.4 74 Laprele Creek 8375 6.4 5.2 123 6.2 6.9 90 Reno Hill 8400 -M 6.9 * -M 8.2 * Windy Peak 7900 5.1 3.8 134 5.8 5.9 98 ----- ----- Basin Index (%) 109 86 LARAMIE RIVER Brooklyn Lake 10240 15.2 11.2 136 14.2 11.6 122 Cinnabar Park 9574 12.6 11.7 108 15.1 14.5 104 Crow Creek 8330 4.0 5.3 75 5.7 6.1 93 Deadman Hill 10220 13.6 8.6 158 13.5 9.4 144 Rawah 9020 9.3 5.6 166 11.9 8.6 138 Roach 9700 11.6 9.1 127 13.7 10.8 127 ----- ----- Basin Index (%) 129 121 S. PLATTE Black Mountain 8920 7.0 -M * 8.3 -M * Crow Creek 8330 4.0 5.3 75 5.7 6.1 93 Deadman Hill 10220 13.6 8.6 158 13.5 9.4 144 ----- ----- Basin Index (%) 127 124 LITTLE SNAKE RIVER Battle Mountain 7440 7.9 6.0 132 10.7 8.8 122 Divide Peak 8880 12.0 11.0 109 14.5 12.5 116 Elk River 8700 14.7 9.7 152 14.3 11.5 124 Little Snake River 8915 20.8 12.7 164 26.0 18.6 140 Old Battle 10000 22.7 16.3 139 24.8 20.3 122 Sage Creek Basin 7850 9.8 7.4 132 10.3 8.8 117 Sandstone RS 8150 10.0 7.2 139 10.8 10.8 100 Whiskey Park 8950 18.1 14.5 125 20.2 15.9 127 ----- ----- Basin Index (%) 137 123 UPPER GREEN RIVER Big Sandy Opening 9080 12.5 7.0 179 14.9 7.6 196 Blind Bull Sum 8650 21.7 12.6 172 -M 11.6 * East Rim Divide 7930 10.3 6.0 172 12.6 7.0 180 Elkhart Park G.S. 9400 9.3 6.8 137 14.6 7.8 187 Gros Ventre Summit 8750 9.4 7.6 124 13.7 7.5 183 Gunsight Pass 9820 10.2 7.7 132 14.2 8.0 178 Kendall R.S. 7740 11.9 6.8 175 16.2 8.3 195 Loomis Park 8240 14.3 8.4 170 19.4 10.2 190 New Fork Lake 8340 9.5 6.0 158 9.9 6.4 155 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 11.4 6.5 175 16.1 8.3 194 Spring Creek Divide 9000 19.3 12.6 153 22.6 13.9 163 Triple Peak 8500 21.0 11.6 181 23.2 14.3 162 ----- ----- Basin Index (%) 161 179 LOWER GREEN RIVER Blacks Fork Jct 8870 7.9 -M * 9.9 -M * Buck Pasture 9700 12.1 -M * 14.8 -M * EF Blacks Fork GS 9360 8.6 -M * 9.4 -M * Hams Fork 7840 10.3 6.2 166 12.4 6.6 188 Hewinta 9519 8.2 5.0 164 10.5 7.8 135 Hickerson Park 9145 5.6 3.2 175 6.0 5.7 105 Hole-in-Rock 9150 4.7 3.6 131 6.6 5.4 122 Indian Creek 9425 20.0 13.1 153 -M 12.6 * Kelley R.S. 8180 14.0 7.8 179 19.1 10.5 182 Spirit Lk 10235 8.5 -M * 10.1 -M * Steel Creek Park 10200 11.1 7.5 148 12.7 9.0 141 ----- ----- Basin Index (%) 159 150 UPPER BEAR RIVER Bear River RS 8777 8.9 -M * 10.8 -M * Bug Lake 7950 -M 9.0 * -M 11.2 * Burts Miller Ranch 8000 4.9 -M * 5.6 -M * Chalk Creek #1 8993 19.7 11.9 166 -M 14.0 * Hayden Fork 9212 13.8 7.6 182 18.3 11.8 155 Kelley R.S. 8180 14.0 7.8 179 19.1 10.5 182 Lily Lake 9156 10.5 6.7 157 12.0 9.7 124 Monte Cristo 8960 19.0 13.9 137 -M 14.7 * Salt River Summit 7760 11.2 6.8 165 16.5 9.6 172 ----- ----- Basin Index (%) 161 158* ----------------------------------------------------------------------------- -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.