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 MONDAY: DECEMBER 19 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 8.7 5.7 153 15.9 8.4 189 Black Bear 8170 13.1 14.0 94 22.3 14.8 151 Blind Bull Sum 8650 11.6 7.6 153 13.4 7.8 172 Cottonwood Creek 7670 8.2 6.8 121 14.8 9.4 157 East Rim Divide 7930 4.6 3.5 131 7.9 4.6 172 Grand Targhee 9260 20.6 14.1 146 19.6 12.6 156 Granite Creek 6770 7.2 4.6 157 13.6 7.7 177 Grassy Lake 7265 12.3 9.9 124 23.8 13.8 172 Gros Ventre Summit 8750 5.1 4.8 106 9.2 5.2 177 Gunsight Pass 9820 5.7 4.3 133 10.0 5.3 189 Lewis Lake Divide 7850 10.3 10.0 103 21.7 13.8 157 Phillips Bench 8200 7.9 8.5 93 17.5 10.4 168 Salt River Summit 7760 4.2 3.6 117 9.8 6.1 161 Snake River Station 6920 8.3 5.1 163 16.9 9.3 182 Spring Creek Divide 9000 10.4 8.0 130 15.7 9.0 174 Thumb Divide 7980 5.3 4.9 108 11.4 7.4 154 Togwotee Pass 9580 11.6 9.3 125 15.2 9.8 155 Two Ocean Plateau 9240 16.0 10.7 150 17.6 10.8 163 Willow Creek 8380 9.5 8.6 110 20.2 13.1 154 Younts Peak 8350 6.4 5.6 114 11.2 6.5 172 ----- ----- Basin Index (%) 125 166 MADISON-GALLATIN Black Bear 8170 13.1 14.0 94 22.3 14.8 151 Canyon 7870 5.6 4.2 133 11.6 6.5 178 Madison Plateau 7750 7.0 8.3 84 16.9 10.2 166 West Yellowstone 6700 3.7 3.5 106 11.2 5.8 193 Whiskey Creek 6800 4.1 5.1 80 12.0 8.2 146 ----- ----- Basin Index (%) 95 163 YELLOWSTONE Beartooth Lake 9360 10.4 8.3 125 5.4 7.7 70 Burnt Mtn 5880 3.0 1.7 176 6.8 6.1 111 Canyon 7870 5.6 4.2 133 11.6 6.5 178 Cole Creek 7850 4.4 5.6 79 4.4 5.9 75 Evening Star 9200 12.2 9.2 133 18.2 11.2 162 Fisher Creek 9100 11.8 12.4 95 17.2 12.5 138 Northeast Entrance 7350 4.0 2.8 143 9.3 5.3 175 Parker Peak 9400 10.7 8.1 132 13.9 7.4 188 Sylvan Lake 8420 8.0 7.6 105 18.0 9.5 189 Thumb Divide 7980 5.3 4.9 108 11.4 7.4 154 Two Ocean Plateau 9240 16.0 10.7 150 17.6 10.8 163 White Mill 8700 9.9 8.3 119 13.4 9.5 141 Wolverine 7650 4.9 3.5 140 8.6 5.4 159 ----- ----- Basin Index (%) 122 148 WIND RIVER Burroughs Creek 8750 6.8 -M * 9.0 -M * Castle Creek 8400 3.7 -M * 5.7 -M * Cold Springs 9630 3.4 2.8 121 5.9 4.4 134 Deer Park 9700 7.8 5.1 153 11.5 7.4 155 Hobbs Park 10100 6.8 5.9 115 7.8 5.5 142 Kirwin 9550 5.9 4.0 148 8.4 4.9 171 Little Warm 9370 3.3 3.8 87 8.0 5.3 151 Owl Creek 8975 2.1 2.2 95 3.5 2.6 135 South Pass 9040 7.5 5.4 139 8.3 7.2 115 St. Lawrence Alt 8620 1.5 2.6 58 5.1 3.9 131 Togwotee Pass 9580 11.6 9.3 125 15.2 9.8 155 Townsend Creek 8700 2.9 3.3 88 5.7 5.2 110 ----- ----- Basin Index (%) 119 141 BIGHORN BASIN Bald Mtn. 9380 9.1 7.0 130 7.8 6.8 115 Bear Trap Meadow 8200 1.3 2.1 62 3.2 3.8 84 Bone Springs Div 9350 6.2 6.3 98 7.2 6.1 118 Grave Springs 8550 2.1 2.6 81 3.7 4.4 84 Kirwin 9550 5.9 4.0 148 8.4 4.9 171 Marquette 8760 3.8 -M * 6.4 -M * Middle Powder 7760 2.7 3.9 69 3.4 5.4 63 Owl Creek 8975 2.1 2.2 95 3.5 2.6 135 Powder River Pass 9480 1.6 3.8 42 4.2 5.1 82 Shell Creek 9580 6.8 6.2 110 5.7 5.7 100 Timber Creek 7950 2.6 1.9 137 4.0 3.6 111 ----- ----- Basin Index (%) 101 106 SHOSHONE RIVER Blackwater 9780 13.9 9.1 153 16.8 8.6 195 Evening Star 9200 12.2 9.2 133 18.2 11.2 162 Marquette 8760 3.8 -M * 6.4 -M * Sylvan Road 7120 5.5 4.2 131 15.1 7.8 194 Younts Peak 8350 6.4 5.6 114 11.2 6.5 172 ----- ----- Basin Index (%) 135 180 POWDER RIVER Bear Trap Meadow 8200 1.3 2.1 62 3.2 3.8 84 Cloud Peak Reservoir 9860 3.4 5.1 67 5.7 5.6 102 Grave Springs 8550 2.1 2.6 81 3.7 4.4 84 Hansen Sawmill 8360 2.4 2.4 100 4.1 3.6 114 Middle Powder 7760 2.7 3.9 69 3.4 5.4 63 Powder River Pass 9480 1.6 3.8 42 4.2 5.1 82 Soldier Park 8720 2.2 -M * 4.5 -M * ----- ----- Basin Index (%) 68 87 TONGUE RIVER Big Goose 7990 3.1 3.1 100 4.4 4.7 94 Bone Springs Div 9350 6.2 6.3 98 7.2 6.1 118 Burgess Junction 7880 3.3 3.9 85 4.8 5.1 94 Dome Lake 8880 3.0 4.5 67 5.8 6.0 97 Little Goose 8870 3.5 -M * 5.5 -M * Sucker Creek 8880 4.1 4.2 98 4.8 5.9 81 Tie Creek 6870 2.7 1.2 225 5.5 4.9 112 ----- ----- Basin Index (%) 97 99 BELLE FOURCHE Cole Canyon 5910 2.1 1.0 210 3.3 4.1 80 ----- ----- Basin Index (%) 210 80 CHEYENNE RIVER BASIN Blind Park 6890 2.8 2.2 127 4.2 5.2 81 North Rapid Creek 6130 2.6 2.4 108 2.8 4.3 65 ----- ----- Basin Index (%) 117 74 UPPER N. PLATTE Arapaho Ridge 10960 9.2 7.8 118 11.1 9.3 119 Blackhall Mtn 9820 10.7 -M * 12.7 -M * Columbine 9160 8.6 7.1 121 10.2 9.7 105 Divide Peak 8880 5.6 6.6 85 7.8 8.8 89 Joe Wright 10120 6.2 8.2 76 11.2 10.4 108 Laprele Creek 8375 3.3 3.1 106 3.7 5.1 73 Med Bow 10500 13.3 -M * 13.9 -M * North French Creek 10130 7.9 9.8 81 10.1 10.2 99 Never Summer 10280 7.6 7.0 109 8.0 -M * Old Battle 10000 10.0 10.7 93 10.7 13.7 78 Rawah 9020 4.7 3.7 127 7.0 6.2 113 Sage Creek Basin 7850 3.9 4.3 91 5.5 6.0 92 Sand Lake 10050 9.1 9.6 95 9.2 9.6 96 South Brush Creek 8440 2.8 4.0 70 4.0 6.2 65 Tower 10500 12.6 16.8 75 15.4 15.7 98 Webber Springs 9250 7.5 8.1 93 12.2 10.5 116 Willow Creek Pass 9540 6.4 4.7 136 7.2 5.6 129 Zirkel 9340 10.3 7.7 134 13.9 11.5 121 ----- ----- Basin Index (%) 97 101 SWEETWATER Deer Park 9700 7.8 5.1 153 11.5 7.4 155 Larsen Creek 9000 5.5 3.9 141 9.9 -M * South Pass 9040 7.5 5.4 139 8.3 7.2 115 ----- ----- Basin Index (%) 144 136 LOWER N. PLATTE Casper Mtn. 7900 3.5 4.9 71 4.4 6.6 67 Laprele Creek 8375 3.3 3.1 106 3.7 5.1 73 Reno Hill 8400 -M 5.0 * -M 6.2 * Windy Peak 7900 3.2 2.6 123 3.9 4.5 87 ----- ----- Basin Index (%) 94 74 LARAMIE RIVER Brooklyn Lake 10240 6.7 6.8 99 7.1 7.8 91 Cinnabar Park 9574 6.2 7.5 83 8.8 9.6 92 Crow Creek 8330 2.3 3.7 62 3.5 4.6 76 Deadman Hill 10220 6.7 6.0 112 7.3 6.6 111 Rawah 9020 4.7 3.7 127 7.0 6.2 113 Roach 9700 -M 5.5 * -M 7.5 * ----- ----- Basin Index (%) 96 97 S. PLATTE Black Mountain 8920 3.5 -M * 5.2 -M * Crow Creek 8330 2.3 3.7 62 3.5 4.6 76 Deadman Hill 10220 6.7 6.0 112 7.3 6.6 111 ----- ----- Basin Index (%) 93 96 LITTLE SNAKE RIVER Battle Mountain 7440 3.2 3.0 107 -M 6.0 * Divide Peak 8880 5.6 6.6 85 7.8 8.8 89 Elk River 8700 7.2 5.2 138 8.3 7.6 109 Little Snake River 8915 9.5 6.4 148 14.3 12.4 115 Old Battle 10000 10.0 10.7 93 10.7 13.7 78 Sage Creek Basin 7850 3.9 4.3 91 5.5 6.0 92 Sandstone RS 8150 4.5 3.7 122 4.7 7.2 65 Whiskey Park 8950 7.5 7.8 96 11.2 10.1 111 ----- ----- Basin Index (%) 108 95 UPPER GREEN RIVER Big Sandy Opening 9080 7.0 4.7 149 9.9 5.3 187 Blind Bull Sum 8650 11.6 7.6 153 13.4 7.8 172 East Rim Divide 7930 4.6 3.5 131 7.9 4.6 172 Elkhart Park G.S. 9400 4.3 4.5 96 9.7 5.4 180 Gros Ventre Summit 8750 5.1 4.8 106 9.2 5.2 177 Gunsight Pass 9820 5.7 4.3 133 10.0 5.3 189 Kendall R.S. 7740 6.4 3.8 168 10.8 5.4 200 Loomis Park 8240 7.4 5.0 148 12.7 6.6 192 New Fork Lake 8340 5.0 3.4 147 5.9 4.3 137 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 4.8 4.0 120 10.1 5.4 187 Spring Creek Divide 9000 10.4 8.0 130 15.7 9.0 174 Triple Peak 8500 12.1 6.9 175 16.9 9.2 184 ----- ----- Basin Index (%) 140 180 LOWER GREEN RIVER Blacks Fork Jct 8870 3.7 -M * 5.8 -M * Buck Pasture 9700 5.4 -M * 8.4 -M * EF Blacks Fork GS 9360 5.0 -M * 5.6 -M * Hams Fork 7840 3.9 3.5 111 7.9 4.4 180 Hewinta 9519 3.8 3.0 127 6.1 5.8 105 Hickerson Park 9145 3.3 2.1 157 3.5 4.4 80 Hole-in-Rock 9150 2.1 2.3 91 4.1 4.2 98 Indian Creek 9425 9.9 8.3 119 13.8 8.2 168 Kelley R.S. 8180 6.8 4.7 145 12.3 7.0 176 Spirit Lk 10235 4.2 -M * 6.5 -M * Steel Creek Park 10200 5.6 5.5 102 7.8 6.6 118 ----- ----- Basin Index (%) 120 137 UPPER BEAR RIVER Bear River RS 8777 4.0 -M * 5.9 -M * Bug Lake 7950 9.0 5.3 170 10.3 7.6 136 Burts Miller Ranch 8000 2.3 -M * 3.1 -M * Chalk Creek #1 8993 9.6 8.6 112 11.9 10.0 119 Hayden Fork 9212 6.9 4.4 157 10.8 8.2 132 Kelley R.S. 8180 6.8 4.7 145 12.3 7.0 176 Lily Lake 9156 4.4 4.4 100 6.8 7.0 97 Monte Cristo 8960 9.2 8.4 110 12.4 9.9 125 Salt River Summit 7760 4.2 3.6 117 9.8 6.1 161 ----- ----- Basin Index (%) 127 133 ----------------------------------------------------------------------------- -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.