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 WEDNESDAY: DECEMBER 21 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 9.5 5.9 161 16.7 8.6 194 Black Bear 8170 14.0 14.4 97 23.5 15.3 154 Blind Bull Sum 8650 12.9 7.8 165 14.4 8.0 180 Cottonwood Creek 7670 8.8 7.1 124 15.8 9.6 165 East Rim Divide 7930 5.2 3.6 144 8.4 4.7 179 Grand Targhee 9260 21.7 14.5 150 21.0 12.8 164 Granite Creek 6770 8.1 4.8 169 14.5 7.9 184 Grassy Lake 7265 13.5 10.2 132 25.4 14.2 179 Gros Ventre Summit 8750 5.4 4.9 110 9.8 5.3 185 Gunsight Pass 9820 6.3 4.5 140 10.6 5.4 196 Lewis Lake Divide 7850 11.4 10.4 110 23.0 14.2 162 Phillips Bench 8200 9.4 8.8 107 18.5 10.7 173 Salt River Summit 7760 4.7 3.8 124 10.7 6.3 170 Snake River Station 6920 9.0 5.3 170 17.7 9.4 188 Spring Creek Divide 9000 11.0 8.2 134 16.4 9.3 176 Thumb Divide 7980 5.8 5.1 114 11.9 7.5 159 Togwotee Pass 9580 12.6 9.5 133 16.3 10.0 163 Two Ocean Plateau 9240 17.0 10.8 157 18.4 11.1 166 Willow Creek 8380 10.2 9.0 113 20.7 13.4 154 Younts Peak 8350 7.3 5.8 126 12.0 6.6 182 ----- ----- Basin Index (%) 132 171 MADISON-GALLATIN Black Bear 8170 14.0 14.4 97 23.5 15.3 154 Canyon 7870 5.9 4.4 134 12.0 6.8 176 Madison Plateau 7750 7.6 8.7 87 17.6 10.5 168 West Yellowstone 6700 4.4 3.7 119 11.7 5.9 198 Whiskey Creek 6800 4.8 5.4 89 12.5 8.4 149 ----- ----- Basin Index (%) 100 165 YELLOWSTONE Beartooth Lake 9360 11.3 8.6 131 5.9 7.9 75 Burnt Mtn 5880 3.0 1.8 167 6.8 6.2 110 Canyon 7870 5.9 4.4 134 12.0 6.8 176 Cole Creek 7850 4.7 5.7 82 4.7 6.0 78 Evening Star 9200 13.3 9.5 140 19.4 11.5 169 Fisher Creek 9100 12.7 12.9 98 17.9 12.9 139 Northeast Entrance 7350 4.2 2.9 145 9.5 5.4 176 Parker Peak 9400 11.8 8.4 140 14.7 7.6 193 Sylvan Lake 8420 8.9 7.9 113 19.2 9.8 196 Thumb Divide 7980 5.8 5.1 114 11.9 7.5 159 Two Ocean Plateau 9240 17.0 10.8 157 18.4 11.1 166 White Mill 8700 10.5 8.6 122 14.0 9.8 143 Wolverine 7650 -M 3.8 * -M 5.5 * ----- ----- Basin Index (%) 126 151 WIND RIVER Burroughs Creek 8750 7.6 -M * 10.1 -M * Castle Creek 8400 4.3 -M * 6.4 -M * Cold Springs 9630 3.7 2.8 132 6.2 4.5 138 Deer Park 9700 7.8 5.2 150 11.8 7.6 155 Hobbs Park 10100 7.3 6.0 122 8.3 5.6 148 Kirwin 9550 6.4 4.1 156 9.3 5.0 186 Little Warm 9370 3.7 3.9 95 8.4 5.4 156 Owl Creek 8975 2.3 2.3 100 3.7 2.6 142 South Pass 9040 7.8 5.6 139 8.6 7.3 118 St. Lawrence Alt 8620 1.8 2.5 72 5.3 3.9 136 Togwotee Pass 9580 12.6 9.5 133 16.3 10.0 163 Townsend Creek 8700 3.3 3.4 97 6.3 5.3 119 ----- ----- Basin Index (%) 125 147 BIGHORN BASIN Bald Mtn. 9380 9.2 7.2 128 8.3 7.0 119 Bear Trap Meadow 8200 1.5 2.3 65 3.6 3.9 92 Bone Springs Div 9350 6.4 6.5 98 7.4 6.3 117 Grave Springs 8550 2.4 2.7 89 4.0 4.5 89 Kirwin 9550 6.4 4.1 156 9.3 5.0 186 Marquette 8760 3.5 -M * 6.5 -M * Middle Powder 7760 2.9 4.2 69 3.9 5.6 70 Owl Creek 8975 2.3 2.3 100 3.7 2.6 142 Powder River Pass 9480 1.6 3.9 41 4.8 5.2 92 Shell Creek 9580 7.0 6.4 109 6.2 5.9 105 Timber Creek 7950 2.7 1.9 142 4.0 3.7 108 ----- ----- Basin Index (%) 102 111 SHOSHONE RIVER Blackwater 9780 14.8 9.3 159 18.1 8.8 206 Evening Star 9200 13.3 9.5 140 19.4 11.5 169 Marquette 8760 3.5 -M * 6.5 -M * Sylvan Road 7120 6.5 4.4 148 16.0 8.0 200 Younts Peak 8350 7.3 5.8 126 12.0 6.6 182 ----- ----- Basin Index (%) 144 188 POWDER RIVER Bear Trap Meadow 8200 1.5 2.3 65 3.6 3.9 92 Cloud Peak Reservoir 9860 3.7 5.2 71 6.0 5.7 105 Grave Springs 8550 2.4 2.7 89 4.0 4.5 89 Hansen Sawmill 8360 2.6 2.5 104 4.2 3.7 114 Middle Powder 7760 2.9 4.2 69 3.9 5.6 70 Powder River Pass 9480 1.6 3.9 41 4.8 5.2 92 Soldier Park 8720 3.1 -M * 4.8 -M * ----- ----- Basin Index (%) 71 93 TONGUE RIVER Big Goose 7990 3.3 3.2 103 4.4 4.8 92 Bone Springs Div 9350 6.4 6.5 98 7.4 6.3 117 Burgess Junction 7880 3.4 4.0 85 5.2 5.3 98 Dome Lake 8880 3.6 4.6 78 6.1 6.1 100 Little Goose 8870 3.7 -M * 5.7 -M * Sucker Creek 8880 4.2 4.3 98 5.3 6.0 88 Tie Creek 6870 2.7 1.3 208 5.6 5.0 112 ----- ----- Basin Index (%) 99 101 BELLE FOURCHE Cole Canyon 5910 2.3 1.0 230 3.5 4.2 83 ----- ----- Basin Index (%) 230 83 CHEYENNE RIVER BASIN Blind Park 6890 3.0 2.3 130 4.3 5.3 81 North Rapid Creek 6130 2.8 2.5 112 3.2 4.5 71 ----- ----- Basin Index (%) 121 77 UPPER N. PLATTE Arapaho Ridge 10960 9.3 8.1 115 11.2 9.6 117 Blackhall Mtn 9820 10.8 -M * 13.1 -M * Columbine 9160 8.7 7.5 116 11.3 10.0 113 Divide Peak 8880 5.7 6.9 83 8.3 9.0 92 Joe Wright 10120 6.5 8.5 76 11.3 10.8 105 Laprele Creek 8375 3.8 3.2 119 4.1 5.2 79 Med Bow 10500 13.6 -M * 14.3 -M * North French Creek 10130 8.4 10.1 83 10.4 10.5 99 Never Summer 10280 8.0 7.4 108 8.3 -M * Old Battle 10000 10.2 11.1 92 11.6 14.2 82 Rawah 9020 4.7 3.8 124 7.4 6.6 112 Sage Creek Basin 7850 4.2 4.6 91 5.5 6.2 89 Sand Lake 10050 9.5 9.9 96 9.6 9.9 97 South Brush Creek 8440 3.2 4.1 78 4.9 6.4 77 Tower 10500 12.7 17.4 73 16.2 16.2 100 Webber Springs 9250 7.9 8.3 95 11.4 10.8 106 Willow Creek Pass 9540 6.5 4.8 135 7.7 5.8 133 Zirkel 9340 10.4 7.9 132 14.2 11.9 119 ----- ----- Basin Index (%) 97 101 SWEETWATER Deer Park 9700 7.8 5.2 150 11.8 7.6 155 Larsen Creek 9000 6.0 4.0 150 10.1 -M * South Pass 9040 7.8 5.6 139 8.6 7.3 118 ----- ----- Basin Index (%) 146 137 LOWER N. PLATTE Casper Mtn. 7900 4.0 5.1 78 4.8 6.7 72 Laprele Creek 8375 3.8 3.2 119 4.1 5.2 79 Reno Hill 8400 -M 5.1 * -M 6.3 * Windy Peak 7900 3.2 2.7 119 4.1 4.6 89 ----- ----- Basin Index (%) 100 79 LARAMIE RIVER Brooklyn Lake 10240 6.9 7.0 99 7.5 8.0 94 Cinnabar Park 9574 6.4 7.6 84 9.1 10.0 91 Crow Creek 8330 2.1 3.8 55 3.8 4.8 79 Deadman Hill 10220 7.0 6.2 113 7.4 6.9 107 Rawah 9020 4.7 3.8 124 7.4 6.6 112 Roach 9700 5.0 5.7 88 6.7 7.8 86 ----- ----- Basin Index (%) 94 95 S. PLATTE Black Mountain 8920 3.6 -M * 5.2 -M * Crow Creek 8330 2.1 3.8 55 3.8 4.8 79 Deadman Hill 10220 7.0 6.2 113 7.4 6.9 107 ----- ----- Basin Index (%) 91 96 LITTLE SNAKE RIVER Battle Mountain 7440 3.2 3.1 103 6.3 6.2 102 Divide Peak 8880 5.7 6.9 83 8.3 9.0 92 Elk River 8700 7.2 5.4 133 8.4 7.8 108 Little Snake River 8915 9.9 6.8 146 14.9 12.8 116 Old Battle 10000 10.2 11.1 92 11.6 14.2 82 Sage Creek Basin 7850 4.2 4.6 91 5.5 6.2 89 Sandstone RS 8150 4.4 3.9 113 5.3 7.5 71 Whiskey Park 8950 8.2 8.1 101 11.4 10.5 109 ----- ----- Basin Index (%) 106 97 UPPER GREEN RIVER Big Sandy Opening 9080 7.5 4.7 160 10.2 5.4 189 Blind Bull Sum 8650 12.9 7.8 165 14.4 8.0 180 East Rim Divide 7930 5.2 3.6 144 8.4 4.7 179 Elkhart Park G.S. 9400 4.9 4.5 109 10.1 5.5 184 Gros Ventre Summit 8750 5.4 4.9 110 9.8 5.3 185 Gunsight Pass 9820 6.3 4.5 140 10.6 5.4 196 Kendall R.S. 7740 7.0 4.0 175 11.3 5.5 205 Loomis Park 8240 8.1 5.2 156 13.4 6.8 197 New Fork Lake 8340 5.4 3.6 150 6.4 4.4 145 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 5.3 4.3 123 10.6 5.6 189 Spring Creek Divide 9000 11.0 8.2 134 16.4 9.3 176 Triple Peak 8500 12.8 7.2 178 17.7 9.5 186 ----- ----- Basin Index (%) 147 185 LOWER GREEN RIVER Blacks Fork Jct 8870 4.2 -M * 5.8 -M * Buck Pasture 9700 5.8 -M * 8.5 -M * EF Blacks Fork GS 9360 5.4 -M * 5.8 -M * Hams Fork 7840 4.6 3.6 128 8.3 4.5 184 Hewinta 9519 3.9 3.2 122 6.3 5.9 107 Hickerson Park 9145 3.5 2.2 159 4.0 4.5 89 Hole-in-Rock 9150 2.4 2.5 96 4.4 4.2 105 Indian Creek 9425 10.4 8.7 120 14.5 8.4 173 Kelley R.S. 8180 7.3 5.0 146 12.8 7.2 178 Spirit Lk 10235 4.3 -M * 6.8 -M * Steel Creek Park 10200 6.0 5.6 107 7.8 6.7 116 ----- ----- Basin Index (%) 124 140 UPPER BEAR RIVER Bear River RS 8777 4.1 -M * 6.1 -M * Bug Lake 7950 9.0 5.5 164 10.3 7.8 132 Burts Miller Ranch 8000 2.4 -M * 3.4 -M * Chalk Creek #1 8993 9.7 9.0 108 11.9 10.2 117 Hayden Fork 9212 6.8 4.5 151 10.8 8.3 130 Kelley R.S. 8180 7.3 5.0 146 12.8 7.2 178 Lily Lake 9156 4.6 4.5 102 6.9 7.2 96 Monte Cristo 8960 9.3 8.7 107 12.8 10.1 127 Salt River Summit 7760 4.7 3.8 124 10.7 6.3 170 ----- ----- Basin Index (%) 125 133 ----------------------------------------------------------------------------- -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.