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 TUESDAY: DECEMBER 20 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 8.8 5.8 152 16.1 8.5 189 Black Bear 8170 13.2 14.2 93 22.6 15.1 150 Blind Bull Sum 8650 12.1 7.8 155 13.8 7.9 175 Cottonwood Creek 7670 8.5 7.0 121 15.5 9.5 163 East Rim Divide 7930 4.8 3.5 137 8.1 4.6 176 Grand Targhee 9260 20.8 14.3 145 20.3 12.7 160 Granite Creek 6770 7.4 4.7 157 13.7 7.8 176 Grassy Lake 7265 12.5 10.0 125 24.2 13.9 174 Gros Ventre Summit 8750 5.2 4.8 108 9.6 5.3 181 Gunsight Pass 9820 5.8 4.4 132 10.3 5.4 191 Lewis Lake Divide 7850 10.7 10.2 105 22.4 14.0 160 Phillips Bench 8200 8.5 8.7 98 17.7 10.6 167 Salt River Summit 7760 4.5 3.7 122 10.4 6.2 168 Snake River Station 6920 8.4 5.2 162 17.0 9.4 181 Spring Creek Divide 9000 10.7 8.1 132 16.0 9.2 174 Thumb Divide 7980 5.5 5.0 110 11.6 7.4 157 Togwotee Pass 9580 11.8 9.4 126 15.4 9.9 156 Two Ocean Plateau 9240 -M 10.8 * -M 10.9 * Willow Creek 8380 10.0 8.8 114 20.4 13.2 155 Younts Peak 8350 6.6 5.7 116 11.4 6.6 173 ----- ----- Basin Index (%) 124 167 MADISON-GALLATIN Black Bear 8170 13.2 14.2 93 22.6 15.1 150 Canyon 7870 5.5 4.3 128 11.7 6.6 177 Madison Plateau 7750 7.1 8.5 84 17.2 10.3 167 West Yellowstone 6700 3.9 3.6 108 11.2 5.9 190 Whiskey Creek 6800 4.3 5.2 83 12.1 8.3 146 ----- ----- Basin Index (%) 95 162 YELLOWSTONE Beartooth Lake 9360 10.7 8.4 127 5.7 7.7 74 Burnt Mtn 5880 3.1 1.7 182 6.9 6.2 111 Canyon 7870 5.5 4.3 128 11.7 6.6 177 Cole Creek 7850 4.6 5.6 82 4.6 5.9 78 Evening Star 9200 12.5 9.4 133 18.4 11.3 163 Fisher Creek 9100 12.1 12.6 96 17.5 12.7 138 Northeast Entrance 7350 4.1 2.8 146 9.4 5.3 177 Parker Peak 9400 11.1 8.3 134 14.1 7.5 188 Sylvan Lake 8420 8.1 7.7 105 18.2 9.6 190 Thumb Divide 7980 5.5 5.0 110 11.6 7.4 157 Two Ocean Plateau 9240 -M 10.8 * -M 10.9 * White Mill 8700 10.1 8.5 119 13.6 9.6 142 Wolverine 7650 5.1 3.6 142 8.8 5.4 163 ----- ----- Basin Index (%) 119 148 WIND RIVER Burroughs Creek 8750 6.8 -M * 9.4 -M * Castle Creek 8400 3.9 -M * 6.0 -M * Cold Springs 9630 3.6 2.8 129 6.1 4.5 136 Deer Park 9700 7.8 5.2 150 11.7 7.4 158 Hobbs Park 10100 7.1 5.9 120 8.2 5.5 149 Kirwin 9550 5.9 4.1 144 8.7 5.0 174 Little Warm 9370 3.5 3.8 92 8.2 5.4 152 Owl Creek 8975 2.2 2.3 96 3.7 2.6 142 South Pass 9040 7.6 5.5 138 8.4 7.2 117 St. Lawrence Alt 8620 1.9 2.5 76 5.3 3.9 136 Togwotee Pass 9580 11.8 9.4 126 15.4 9.9 156 Townsend Creek 8700 3.3 3.3 100 6.2 5.2 119 ----- ----- Basin Index (%) 122 145 BIGHORN BASIN Bald Mtn. 9380 9.2 7.1 130 8.1 6.8 119 Bear Trap Meadow 8200 1.5 2.2 68 3.4 3.8 89 Bone Springs Div 9350 6.3 6.4 98 7.3 6.2 118 Grave Springs 8550 2.3 2.7 85 3.9 4.4 89 Kirwin 9550 5.9 4.1 144 8.7 5.0 174 Marquette 8760 3.5 -M * 6.5 -M * Middle Powder 7760 2.8 4.0 70 3.7 5.5 67 Owl Creek 8975 2.2 2.3 96 3.7 2.6 142 Powder River Pass 9480 1.6 3.9 41 4.5 5.1 88 Shell Creek 9580 6.9 6.3 110 6.0 5.8 103 Timber Creek 7950 2.6 1.9 137 4.0 3.6 111 ----- ----- Basin Index (%) 101 109 SHOSHONE RIVER Blackwater 9780 14.0 9.2 152 17.2 8.8 195 Evening Star 9200 12.5 9.4 133 18.4 11.3 163 Marquette 8760 3.5 -M * 6.5 -M * Sylvan Road 7120 5.6 4.3 130 15.2 7.9 192 Younts Peak 8350 6.6 5.7 116 11.4 6.6 173 ----- ----- Basin Index (%) 135 180 POWDER RIVER Bear Trap Meadow 8200 1.5 2.2 68 3.4 3.8 89 Cloud Peak Reservoir 9860 3.6 5.1 71 5.9 5.6 105 Grave Springs 8550 2.3 2.7 85 3.9 4.4 89 Hansen Sawmill 8360 2.6 2.4 108 4.2 3.7 114 Middle Powder 7760 2.8 4.0 70 3.7 5.5 67 Powder River Pass 9480 1.6 3.9 41 4.5 5.1 88 Soldier Park 8720 2.7 -M * 4.8 -M * ----- ----- Basin Index (%) 71 91 TONGUE RIVER Big Goose 7990 3.3 3.1 106 4.5 4.8 94 Bone Springs Div 9350 6.3 6.4 98 7.3 6.2 118 Burgess Junction 7880 3.4 4.0 85 5.1 5.2 98 Dome Lake 8880 3.4 4.6 74 5.9 6.1 97 Little Goose 8870 3.6 -M * 5.6 -M * Sucker Creek 8880 4.2 4.2 100 5.1 6.0 85 Tie Creek 6870 2.7 1.2 225 5.6 4.9 114 ----- ----- Basin Index (%) 99 101 BELLE FOURCHE Cole Canyon 5910 2.1 1.0 210 3.4 4.2 81 ----- ----- Basin Index (%) 210 81 CHEYENNE RIVER BASIN Blind Park 6890 3.0 2.3 130 4.2 5.2 81 North Rapid Creek 6130 2.8 2.5 112 3.1 4.4 70 ----- ----- Basin Index (%) 121 76 UPPER N. PLATTE Arapaho Ridge 10960 9.3 8.0 116 11.2 9.4 119 Blackhall Mtn 9820 10.8 -M * 13.0 -M * Columbine 9160 8.6 7.3 118 10.9 9.9 110 Divide Peak 8880 5.8 6.8 85 8.1 8.9 91 Joe Wright 10120 6.4 8.3 77 11.3 10.6 107 Laprele Creek 8375 3.7 3.2 116 4.0 5.2 77 Med Bow 10500 13.6 -M * 14.2 -M * North French Creek 10130 8.3 10.0 83 10.3 10.4 99 Never Summer 10280 7.9 7.2 110 8.3 -M * Old Battle 10000 10.1 10.9 93 11.3 14.0 81 Rawah 9020 4.7 3.7 127 7.3 6.4 114 Sage Creek Basin 7850 4.1 4.4 93 5.6 6.1 92 Sand Lake 10050 9.4 9.7 97 9.5 9.8 97 South Brush Creek 8440 3.0 4.1 73 4.6 6.3 73 Tower 10500 12.7 17.1 74 15.8 16.0 99 Webber Springs 9250 7.7 8.2 94 11.3 10.7 106 Willow Creek Pass 9540 6.5 4.8 135 7.5 5.7 132 Zirkel 9340 10.4 7.8 133 14.1 11.8 119 ----- ----- Basin Index (%) 98 101 SWEETWATER Deer Park 9700 7.8 5.2 150 11.7 7.4 158 Larsen Creek 9000 5.9 4.0 148 10.0 -M * South Pass 9040 7.6 5.5 138 8.4 7.2 117 ----- ----- Basin Index (%) 145 138 LOWER N. PLATTE Casper Mtn. 7900 3.8 5.0 76 4.6 6.6 70 Laprele Creek 8375 3.7 3.2 116 4.0 5.2 77 Reno Hill 8400 -M 5.1 * -M 6.3 * Windy Peak 7900 3.2 2.7 119 4.1 4.6 89 ----- ----- Basin Index (%) 98 77 LARAMIE RIVER Brooklyn Lake 10240 6.9 6.9 100 7.4 7.9 94 Cinnabar Park 9574 6.4 7.5 85 9.0 9.8 92 Crow Creek 8330 2.2 3.8 58 3.7 4.6 80 Deadman Hill 10220 6.9 6.1 113 7.4 6.7 110 Rawah 9020 4.7 3.7 127 7.3 6.4 114 Roach 9700 4.9 5.6 88 6.6 7.7 86 ----- ----- Basin Index (%) 95 96 S. PLATTE Black Mountain 8920 3.6 -M * 5.2 -M * Crow Creek 8330 2.2 3.8 58 3.7 4.6 80 Deadman Hill 10220 6.9 6.1 113 7.4 6.7 110 ----- ----- Basin Index (%) 92 98 LITTLE SNAKE RIVER Battle Mountain 7440 3.2 3.1 103 6.2 6.1 102 Divide Peak 8880 5.8 6.8 85 8.1 8.9 91 Elk River 8700 7.2 5.3 136 8.3 7.7 108 Little Snake River 8915 9.9 6.6 150 14.8 12.6 117 Old Battle 10000 10.1 10.9 93 11.3 14.0 81 Sage Creek Basin 7850 4.1 4.4 93 5.6 6.1 92 Sandstone RS 8150 4.5 3.8 118 5.3 7.4 72 Whiskey Park 8950 8.0 8.0 100 11.4 10.3 111 ----- ----- Basin Index (%) 108 97 UPPER GREEN RIVER Big Sandy Opening 9080 7.3 4.7 155 10.1 5.3 191 Blind Bull Sum 8650 12.1 7.8 155 13.8 7.9 175 East Rim Divide 7930 4.8 3.5 137 8.1 4.6 176 Elkhart Park G.S. 9400 4.5 4.5 100 9.9 5.4 183 Gros Ventre Summit 8750 5.2 4.8 108 9.6 5.3 181 Gunsight Pass 9820 5.8 4.4 132 10.3 5.4 191 Kendall R.S. 7740 6.6 3.9 169 10.8 5.4 200 Loomis Park 8240 7.7 5.1 151 12.9 6.7 193 New Fork Lake 8340 5.2 3.5 149 6.3 4.4 143 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 5.0 4.2 119 10.4 5.5 189 Spring Creek Divide 9000 10.7 8.1 132 16.0 9.2 174 Triple Peak 8500 12.3 7.1 173 17.2 9.3 185 ----- ----- Basin Index (%) 142 182 LOWER GREEN RIVER Blacks Fork Jct 8870 4.1 -M * 5.8 -M * Buck Pasture 9700 5.8 -M * 8.5 -M * EF Blacks Fork GS 9360 5.3 -M * 5.9 -M * Hams Fork 7840 4.4 3.5 126 8.1 4.4 184 Hewinta 9519 4.0 3.1 129 6.4 5.8 110 Hickerson Park 9145 3.4 2.1 162 3.9 4.5 87 Hole-in-Rock 9150 2.3 2.4 96 4.3 4.2 102 Indian Creek 9425 10.1 8.5 119 14.2 8.3 171 Kelley R.S. 8180 7.1 4.8 148 12.7 7.0 181 Spirit Lk 10235 4.3 -M * 6.8 -M * Steel Creek Park 10200 5.9 5.5 107 7.8 6.6 118 ----- ----- Basin Index (%) 124 141 UPPER BEAR RIVER Bear River RS 8777 4.0 -M * 6.1 -M * Bug Lake 7950 9.0 5.4 167 10.4 7.7 135 Burts Miller Ranch 8000 2.3 -M * 3.4 -M * Chalk Creek #1 8993 9.7 8.8 110 11.9 10.1 118 Hayden Fork 9212 6.9 4.5 153 10.9 8.2 133 Kelley R.S. 8180 7.1 4.8 148 12.7 7.0 181 Lily Lake 9156 4.6 4.5 102 6.8 7.1 96 Monte Cristo 8960 9.3 8.5 109 12.7 10.0 127 Salt River Summit 7760 4.5 3.7 122 10.4 6.2 168 ----- ----- Basin Index (%) 127 135 ----------------------------------------------------------------------------- -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.