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 26 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 9.7 6.6 147 17.4 9.1 191 Black Bear 8170 14.8 15.8 94 24.2 16.2 149 Blind Bull Sum 8650 12.9 8.3 155 14.7 8.5 173 Cottonwood Creek 7670 9.3 7.7 121 16.2 10.2 159 East Rim Divide 7930 6.6 3.9 169 9.1 5.0 182 Grand Targhee 9260 22.0 16.3 135 21.5 14.1 152 Granite Creek 6770 9.0 5.5 164 15.4 8.5 181 Grassy Lake 7265 13.9 11.1 125 25.8 15.4 168 Gros Ventre Summit 8750 6.0 5.5 109 10.3 5.6 184 Gunsight Pass 9820 6.7 5.2 129 11.0 5.8 190 Lewis Lake Divide 7850 11.6 11.8 98 23.2 15.3 152 Phillips Bench 8200 10.6 9.7 109 19.7 11.6 170 Salt River Summit 7760 5.1 4.3 119 10.9 6.8 160 Snake River Station 6920 9.2 5.6 164 17.9 10.0 179 Spring Creek Divide 9000 11.5 8.7 132 16.8 9.9 170 Thumb Divide 7980 6.1 5.6 109 12.2 7.9 154 Togwotee Pass 9580 12.9 10.2 126 16.5 10.6 156 Two Ocean Plateau 9240 -M 11.5 * -M 11.6 * Willow Creek 8380 10.7 9.8 109 21.6 14.3 151 Younts Peak 8350 7.2 6.4 112 12.1 7.0 173 ----- ----- Basin Index (%) 124 165 MADISON-GALLATIN Black Bear 8170 14.8 15.8 94 24.2 16.2 149 Canyon 7870 6.3 4.8 131 12.3 7.2 171 Madison Plateau 7750 8.4 9.5 88 18.3 11.1 165 West Yellowstone 6700 5.1 4.1 124 12.4 6.4 194 Whiskey Creek 6800 5.4 5.8 93 13.2 8.9 148 ----- ----- Basin Index (%) 100 161 YELLOWSTONE Beartooth Lake 9360 11.2 9.1 123 5.8 8.4 69 Burnt Mtn 5880 3.2 1.9 168 7.0 6.4 109 Canyon 7870 6.3 4.8 131 12.3 7.2 171 Cole Creek 7850 4.6 6.0 77 4.4 6.2 71 Evening Star 9200 13.4 10.2 131 19.4 12.2 159 Fisher Creek 9100 12.9 13.7 94 18.1 13.8 131 Northeast Entrance 7350 4.3 3.3 130 9.6 5.7 168 Parker Peak 9400 11.7 9.0 130 14.8 7.9 187 Sylvan Lake 8420 9.1 8.5 107 19.3 10.4 186 Thumb Divide 7980 6.1 5.6 109 12.2 7.9 154 Two Ocean Plateau 9240 -M 11.5 * -M 11.6 * White Mill 8700 10.7 9.0 119 14.1 10.4 136 Wolverine 7650 6.3 4.3 147 10.0 5.8 172 ----- ----- Basin Index (%) 117 144 WIND RIVER Burroughs Creek 8750 7.7 -M * 10.1 -M * Castle Creek 8400 4.5 -M * 6.5 -M * Cold Springs 9630 3.9 3.0 130 6.1 4.7 130 Deer Park 9700 9.1 6.0 152 13.0 8.0 162 Hobbs Park 10100 7.5 6.1 123 8.2 5.8 141 Kirwin 9550 6.6 4.2 157 9.4 5.2 181 Little Warm 9370 3.7 4.1 90 8.4 5.8 145 Owl Creek 8975 2.6 2.4 108 4.0 2.7 148 South Pass 9040 8.6 6.0 143 8.9 7.7 116 St. Lawrence Alt 8620 1.7 2.8 61 5.4 4.1 132 Togwotee Pass 9580 12.9 10.2 126 16.5 10.6 156 Townsend Creek 8700 3.6 3.7 97 6.2 5.6 111 ----- ----- Basin Index (%) 124 143 BIGHORN BASIN Bald Mtn. 9380 10.2 7.6 134 8.8 7.4 119 Bear Trap Meadow 8200 1.8 2.5 72 3.4 4.1 83 Bone Springs Div 9350 7.3 6.9 106 7.8 6.8 115 Grave Springs 8550 2.7 3.0 90 3.9 4.7 83 Kirwin 9550 6.6 4.2 157 9.4 5.2 181 Marquette 8760 3.6 -M * 6.6 -M * Middle Powder 7760 3.3 4.7 70 3.4 5.8 59 Owl Creek 8975 2.6 2.4 108 4.0 2.7 148 Powder River Pass 9480 2.2 4.3 51 4.7 5.6 84 Shell Creek 9580 8.1 6.9 117 6.3 6.2 102 Timber Creek 7950 2.7 2.0 135 4.1 3.8 108 ----- ----- Basin Index (%) 107 107 SHOSHONE RIVER Blackwater 9780 14.7 9.8 150 17.9 9.3 192 Evening Star 9200 13.4 10.2 131 19.4 12.2 159 Marquette 8760 3.6 -M * 6.6 -M * Sylvan Road 7120 6.5 4.9 133 16.2 8.4 193 Younts Peak 8350 7.2 6.4 112 12.1 7.0 173 ----- ----- Basin Index (%) 134 178 POWDER RIVER Bear Trap Meadow 8200 1.8 2.5 72 3.4 4.1 83 Cloud Peak Reservoir 9860 5.0 5.7 88 -M 6.0 * Grave Springs 8550 2.7 3.0 90 3.9 4.7 83 Hansen Sawmill 8360 3.2 2.7 119 4.8 3.9 123 Middle Powder 7760 3.3 4.7 70 3.4 5.8 59 Powder River Pass 9480 2.2 4.3 51 4.7 5.6 84 Soldier Park 8720 4.0 -M * 5.4 -M * ----- ----- Basin Index (%) 79 84 TONGUE RIVER Big Goose 7990 4.0 3.5 114 5.0 5.1 98 Bone Springs Div 9350 7.3 6.9 106 7.8 6.8 115 Burgess Junction 7880 4.0 4.4 91 5.2 5.6 93 Dome Lake 8880 4.4 5.0 88 6.3 6.4 98 Little Goose 8870 4.5 -M * 6.4 -M * Sucker Creek 8880 4.8 4.8 100 5.2 6.4 81 Tie Creek 6870 3.0 1.7 176 5.9 5.3 111 ----- ----- Basin Index (%) 105 99 BELLE FOURCHE Cole Canyon 5910 2.5 1.6 156 3.4 4.5 76 ----- ----- Basin Index (%) 156 76 CHEYENNE RIVER BASIN Blind Park 6890 3.1 2.8 111 4.5 5.7 79 North Rapid Creek 6130 3.1 2.9 107 3.3 4.7 70 ----- ----- Basin Index (%) 109 75 UPPER N. PLATTE Arapaho Ridge 10960 10.5 8.8 119 12.2 10.1 121 Blackhall Mtn 9820 11.8 -M * 13.9 -M * Columbine 9160 9.8 8.1 121 12.0 10.8 111 Divide Peak 8880 6.4 7.6 84 8.7 9.7 90 Joe Wright 10120 7.5 9.0 83 12.5 11.5 109 Laprele Creek 8375 4.1 3.6 114 4.2 5.6 75 Med Bow 10500 15.1 -M * 15.5 -M * North French Creek 10130 9.6 10.7 90 11.5 11.2 103 Never Summer 10280 8.8 8.1 109 8.9 -M * Old Battle 10000 11.2 11.8 95 12.9 15.1 85 Rawah 9020 5.3 3.9 136 7.9 7.0 113 Sage Creek Basin 7850 4.7 5.1 92 6.1 6.7 91 Sand Lake 10050 10.7 10.6 101 10.1 10.6 95 South Brush Creek 8440 3.9 4.4 89 5.4 6.8 79 Tower 10500 13.8 18.2 76 17.0 17.1 99 Webber Springs 9250 8.6 8.9 97 -M 11.5 * Willow Creek Pass 9540 7.2 5.1 141 8.4 6.1 138 Zirkel 9340 11.3 8.8 128 14.9 12.5 119 ----- ----- Basin Index (%) 101 102 SWEETWATER Deer Park 9700 9.1 6.0 152 13.0 8.0 162 Larsen Creek 9000 6.7 4.4 152 10.8 -M * South Pass 9040 8.6 6.0 143 8.9 7.7 116 ----- ----- Basin Index (%) 149 139 LOWER N. PLATTE Casper Mtn. 7900 4.6 5.4 85 5.0 7.1 70 Laprele Creek 8375 4.1 3.6 114 4.2 5.6 75 Reno Hill 8400 -M 5.4 * -M 6.7 * Windy Peak 7900 3.5 3.0 117 4.2 4.9 86 ----- ----- Basin Index (%) 102 76 LARAMIE RIVER Brooklyn Lake 10240 7.6 7.4 103 7.8 8.6 91 Cinnabar Park 9574 7.0 7.9 89 9.7 10.5 92 Crow Creek 8330 2.4 4.0 60 4.0 5.2 77 Deadman Hill 10220 7.5 6.8 110 7.9 7.3 108 Rawah 9020 5.3 3.9 136 7.9 7.0 113 Roach 9700 5.4 6.5 83 7.0 8.4 83 ----- ----- Basin Index (%) 96 94 S. PLATTE Black Mountain 8920 4.0 -M * 5.2 -M * Crow Creek 8330 2.4 4.0 60 4.0 5.2 77 Deadman Hill 10220 7.5 6.8 110 7.9 7.3 108 ----- ----- Basin Index (%) 92 95 LITTLE SNAKE RIVER Battle Mountain 7440 4.0 3.5 114 5.8 6.6 88 Divide Peak 8880 6.4 7.6 84 8.7 9.7 90 Elk River 8700 8.0 6.0 133 9.0 8.5 106 Little Snake River 8915 11.3 7.9 143 16.4 13.7 120 Old Battle 10000 11.2 11.8 95 12.9 15.1 85 Sage Creek Basin 7850 4.7 5.1 92 6.1 6.7 91 Sandstone RS 8150 5.0 4.1 122 5.5 8.0 69 Whiskey Park 8950 9.4 8.7 108 12.6 11.2 112 ----- ----- Basin Index (%) 110 97 UPPER GREEN RIVER Big Sandy Opening 9080 8.0 5.2 154 10.8 5.8 186 Blind Bull Sum 8650 12.9 8.3 155 14.7 8.5 173 East Rim Divide 7930 6.6 3.9 169 9.1 5.0 182 Elkhart Park G.S. 9400 5.4 5.1 106 11.0 5.9 186 Gros Ventre Summit 8750 6.0 5.5 109 10.3 5.6 184 Gunsight Pass 9820 6.7 5.2 129 11.0 5.8 190 Kendall R.S. 7740 7.2 4.3 167 11.5 5.9 195 Loomis Park 8240 9.0 5.7 158 14.3 7.4 193 New Fork Lake 8340 6.1 4.1 149 6.7 4.7 143 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 5.6 4.7 119 10.8 6.0 180 Spring Creek Divide 9000 11.5 8.7 132 16.8 9.9 170 Triple Peak 8500 13.4 7.6 176 18.3 10.0 183 ----- ----- Basin Index (%) 144 180 LOWER GREEN RIVER Blacks Fork Jct 8870 4.4 -M * 6.3 -M * Buck Pasture 9700 6.6 -M * 9.7 -M * EF Blacks Fork GS 9360 6.2 -M * 6.1 -M * Hams Fork 7840 4.7 4.1 115 8.4 4.8 175 Hewinta 9519 4.4 3.4 129 6.6 6.1 108 Hickerson Park 9145 4.2 2.5 168 4.5 4.7 96 Hole-in-Rock 9150 2.9 2.8 104 4.9 4.4 111 Indian Creek 9425 10.9 9.6 114 15.2 9.0 169 Kelley R.S. 8180 7.7 5.7 135 13.2 7.7 171 Spirit Lk 10235 6.5 -M * 8.7 -M * Steel Creek Park 10200 6.6 5.9 112 8.5 7.1 120 ----- ----- Basin Index (%) 122 140 UPPER BEAR RIVER Bear River RS 8777 4.5 -M * 6.4 -M * Bug Lake 7950 8.5 5.8 147 10.8 8.3 130 Burts Miller Ranch 8000 2.5 -M * 3.4 -M * Chalk Creek #1 8993 10.3 9.4 110 12.7 10.8 118 Hayden Fork 9212 7.8 5.0 156 11.9 8.9 134 Kelley R.S. 8180 7.7 5.7 135 13.2 7.7 171 Lily Lake 9156 5.0 4.8 104 7.5 7.6 99 Monte Cristo 8960 10.2 9.3 110 13.1 10.8 121 Salt River Summit 7760 5.1 4.3 119 10.9 6.8 160 ----- ----- Basin Index (%) 123 132 ----------------------------------------------------------------------------- -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.