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: DECEMBER 23 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 9.4 6.2 152 16.9 8.9 190 Black Bear 8170 13.9 15.0 93 23.3 15.7 148 Blind Bull Sum 8650 12.5 8.0 156 14.2 8.2 173 Cottonwood Creek 7670 8.9 7.3 122 15.7 9.9 159 East Rim Divide 7930 5.0 3.7 135 8.3 4.8 173 Grand Targhee 9260 21.5 15.1 142 21.0 13.2 159 Granite Creek 6770 7.8 5.0 156 14.2 8.2 173 Grassy Lake 7265 13.3 10.6 125 24.7 14.8 167 Gros Ventre Summit 8750 5.2 5.1 102 9.6 5.4 178 Gunsight Pass 9820 6.2 4.7 132 10.5 5.6 188 Lewis Lake Divide 7850 11.0 10.9 101 22.8 14.7 155 Phillips Bench 8200 9.2 9.1 101 18.4 11.1 166 Salt River Summit 7760 4.5 4.0 112 10.5 6.6 159 Snake River Station 6920 8.8 5.4 163 17.6 9.7 181 Spring Creek Divide 9000 11.0 8.3 133 16.4 9.6 171 Thumb Divide 7980 5.5 5.3 104 11.5 7.7 149 Togwotee Pass 9580 12.6 9.8 129 16.2 10.2 159 Two Ocean Plateau 9240 16.9 11.0 154 18.2 11.3 161 Willow Creek 8380 10.4 9.4 111 21.3 13.8 154 Younts Peak 8350 7.0 6.0 117 11.6 6.8 171 ----- ----- Basin Index (%) 125 165 MADISON-GALLATIN Black Bear 8170 13.9 15.0 93 23.3 15.7 148 Canyon 7870 6.0 4.6 130 12.0 7.0 171 Madison Plateau 7750 7.5 9.1 82 17.4 10.7 163 West Yellowstone 6700 4.0 3.9 103 11.7 6.1 192 Whiskey Creek 6800 4.3 5.7 75 12.2 8.6 142 ----- ----- Basin Index (%) 93 159 YELLOWSTONE Beartooth Lake 9360 11.1 8.8 126 -M 8.1 * Burnt Mtn 5880 3.0 1.8 167 6.8 6.4 106 Canyon 7870 6.0 4.6 130 12.0 7.0 171 Cole Creek 7850 4.7 5.7 82 4.6 6.1 75 Evening Star 9200 13.4 9.8 137 19.3 11.7 165 Fisher Creek 9100 12.6 13.3 95 18.0 13.3 135 Northeast Entrance 7350 4.3 3.0 143 9.4 5.5 171 Parker Peak 9400 11.5 8.6 134 14.6 7.7 190 Sylvan Lake 8420 9.0 8.1 111 19.1 10.0 191 Thumb Divide 7980 5.5 5.3 104 11.5 7.7 149 Two Ocean Plateau 9240 16.9 11.0 154 18.2 11.3 161 White Mill 8700 10.5 8.8 119 13.9 10.1 138 Wolverine 7650 5.8 4.0 145 9.5 5.6 170 ----- ----- Basin Index (%) 123 153 WIND RIVER Burroughs Creek 8750 7.5 -M * 9.9 -M * Castle Creek 8400 4.1 -M * 6.2 -M * Cold Springs 9630 3.6 2.9 124 6.0 4.6 130 Deer Park 9700 7.8 5.4 144 11.8 7.7 153 Hobbs Park 10100 7.1 6.0 118 8.0 5.7 140 Kirwin 9550 6.1 4.1 149 9.0 5.1 176 Little Warm 9370 3.6 4.0 90 8.4 5.6 150 Owl Creek 8975 2.2 2.3 96 3.6 2.6 138 South Pass 9040 7.7 5.7 135 8.5 7.5 113 St. Lawrence Alt 8620 1.5 2.6 58 5.2 4.0 130 Togwotee Pass 9580 12.6 9.8 129 16.2 10.2 159 Townsend Creek 8700 3.0 3.5 86 5.9 5.4 109 ----- ----- Basin Index (%) 119 141 BIGHORN BASIN Bald Mtn. 9380 9.2 7.3 126 8.1 7.2 112 Bear Trap Meadow 8200 1.4 2.4 58 3.4 3.9 87 Bone Springs Div 9350 6.3 6.7 94 7.3 6.5 112 Grave Springs 8550 2.3 2.9 79 3.8 4.6 83 Kirwin 9550 6.1 4.1 149 9.0 5.1 176 Marquette 8760 3.4 -M * 6.4 -M * Middle Powder 7760 2.8 4.4 64 3.6 5.7 63 Owl Creek 8975 2.2 2.3 96 3.6 2.6 138 Powder River Pass 9480 1.6 4.1 39 4.5 5.4 83 Shell Creek 9580 7.0 6.6 106 6.0 6.0 100 Timber Creek 7950 2.5 1.9 132 3.9 3.8 103 ----- ----- Basin Index (%) 97 105 SHOSHONE RIVER Blackwater 9780 14.7 9.4 156 17.9 9.0 199 Evening Star 9200 13.4 9.8 137 19.3 11.7 165 Marquette 8760 3.4 -M * 6.4 -M * Sylvan Road 7120 6.2 4.6 135 16.0 8.2 195 Younts Peak 8350 7.0 6.0 117 11.6 6.8 171 ----- ----- Basin Index (%) 139 182 POWDER RIVER Bear Trap Meadow 8200 1.4 2.4 58 3.4 3.9 87 Cloud Peak Reservoir 9860 3.4 5.4 63 5.5 5.8 95 Grave Springs 8550 2.3 2.9 79 3.8 4.6 83 Hansen Sawmill 8360 2.5 2.6 96 4.1 3.8 108 Middle Powder 7760 2.8 4.4 64 3.6 5.7 63 Powder River Pass 9480 1.6 4.1 39 4.5 5.4 83 Soldier Park 8720 3.0 -M * 4.7 -M * ----- ----- Basin Index (%) 64 85 TONGUE RIVER Big Goose 7990 3.2 3.3 97 4.4 5.0 88 Bone Springs Div 9350 6.3 6.7 94 7.3 6.5 112 Burgess Junction 7880 3.4 4.2 81 4.9 5.5 89 Dome Lake 8880 3.6 4.7 77 5.9 6.2 95 Little Goose 8870 3.6 -M * 5.6 -M * Sucker Creek 8880 4.2 4.5 93 5.0 6.2 81 Tie Creek 6870 2.6 1.4 186 5.5 5.1 108 ----- ----- Basin Index (%) 94 96 BELLE FOURCHE Cole Canyon 5910 2.2 1.2 183 3.5 4.3 81 ----- ----- Basin Index (%) 183 81 CHEYENNE RIVER BASIN Blind Park 6890 2.9 2.5 116 4.2 5.4 78 North Rapid Creek 6130 2.7 2.6 104 3.0 4.6 65 ----- ----- Basin Index (%) 110 72 UPPER N. PLATTE Arapaho Ridge 10960 9.9 8.4 118 11.7 9.8 119 Blackhall Mtn 9820 11.2 -M * 13.4 -M * Columbine 9160 9.2 7.8 118 11.8 10.4 113 Divide Peak 8880 6.0 7.2 83 8.4 9.3 90 Joe Wright 10120 7.1 8.7 82 11.9 11.0 108 Laprele Creek 8375 3.8 3.4 112 4.1 5.4 76 Med Bow 10500 14.0 -M * 14.7 -M * North French Creek 10130 8.8 10.4 85 10.8 10.8 100 Never Summer 10280 8.3 7.7 108 8.6 -M * Old Battle 10000 10.6 11.4 93 11.8 14.7 80 Rawah 9020 5.1 3.8 134 7.9 6.7 118 Sage Creek Basin 7850 4.3 4.8 90 5.6 6.4 88 Sand Lake 10050 9.8 10.2 96 9.7 10.1 96 South Brush Creek 8440 3.3 4.2 79 5.0 6.5 77 Tower 10500 13.4 17.9 75 16.7 16.6 101 Webber Springs 9250 8.1 8.5 95 11.6 11.2 104 Willow Creek Pass 9540 6.7 5.0 134 8.0 5.9 136 Zirkel 9340 10.8 8.3 130 14.5 12.1 120 ----- ----- Basin Index (%) 98 102 SWEETWATER Deer Park 9700 7.8 5.4 144 11.8 7.7 153 Larsen Creek 9000 5.8 4.2 138 10.0 -M * South Pass 9040 7.7 5.7 135 8.5 7.5 113 ----- ----- Basin Index (%) 139 134 LOWER N. PLATTE Casper Mtn. 7900 3.9 5.2 75 4.8 6.8 71 Laprele Creek 8375 3.8 3.4 112 4.1 5.4 76 Reno Hill 8400 -M 5.2 * -M 6.5 * Windy Peak 7900 3.2 2.8 114 4.2 4.7 89 ----- ----- Basin Index (%) 96 78 LARAMIE RIVER Brooklyn Lake 10240 7.1 7.2 99 7.6 8.3 92 Cinnabar Park 9574 6.6 7.7 86 9.3 10.1 92 Crow Creek 8330 2.1 3.9 54 3.7 4.9 76 Deadman Hill 10220 7.3 6.5 112 7.7 7.1 108 Rawah 9020 5.1 3.8 134 7.9 6.7 118 Roach 9700 5.1 6.0 85 6.8 8.1 84 ----- ----- Basin Index (%) 95 95 S. PLATTE Black Mountain 8920 3.6 -M * 5.3 -M * Crow Creek 8330 2.1 3.9 54 3.7 4.9 76 Deadman Hill 10220 7.3 6.5 112 7.7 7.1 108 ----- ----- Basin Index (%) 90 95 LITTLE SNAKE RIVER Battle Mountain 7440 3.4 3.3 103 6.4 6.4 100 Divide Peak 8880 6.0 7.2 83 8.4 9.3 90 Elk River 8700 7.4 5.7 130 8.5 8.1 105 Little Snake River 8915 10.3 7.2 143 15.3 13.1 117 Old Battle 10000 10.6 11.4 93 11.8 14.7 80 Sage Creek Basin 7850 4.3 4.8 90 5.6 6.4 88 Sandstone RS 8150 4.6 4.0 115 5.4 7.8 69 Whiskey Park 8950 8.7 8.4 104 11.7 10.8 108 ----- ----- Basin Index (%) 106 95 UPPER GREEN RIVER Big Sandy Opening 9080 7.2 4.9 147 10.0 5.6 179 Blind Bull Sum 8650 12.5 8.0 156 14.2 8.2 173 East Rim Divide 7930 5.0 3.7 135 8.3 4.8 173 Elkhart Park G.S. 9400 4.7 4.7 100 10.1 5.7 177 Gros Ventre Summit 8750 5.2 5.1 102 9.6 5.4 178 Gunsight Pass 9820 6.2 4.7 132 10.5 5.6 188 Kendall R.S. 7740 6.7 4.1 163 11.0 5.7 193 Loomis Park 8240 7.9 5.4 146 13.2 7.0 189 New Fork Lake 8340 5.2 3.8 137 6.1 4.5 136 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 5.1 4.5 113 10.4 5.8 179 Spring Creek Divide 9000 11.0 8.3 133 16.4 9.6 171 Triple Peak 8500 12.7 7.4 172 17.5 9.7 180 ----- ----- Basin Index (%) 138 177 LOWER GREEN RIVER Blacks Fork Jct 8870 4.1 -M * 5.9 -M * Buck Pasture 9700 5.8 -M * 8.6 -M * EF Blacks Fork GS 9360 5.2 -M * 5.8 -M * Hams Fork 7840 4.3 3.8 113 8.1 4.6 176 Hewinta 9519 4.0 3.3 121 6.3 6.0 105 Hickerson Park 9145 3.4 2.3 148 3.8 4.6 83 Hole-in-Rock 9150 2.3 2.6 88 4.2 4.3 98 Indian Creek 9425 10.3 9.1 113 14.4 8.7 166 Kelley R.S. 8180 7.1 5.3 134 12.6 7.4 170 Spirit Lk 10235 4.5 -M * 6.8 -M * Steel Creek Park 10200 6.0 5.7 105 7.9 6.8 116 ----- ----- Basin Index (%) 117 135 UPPER BEAR RIVER Bear River RS 8777 4.1 -M * 6.1 -M * Bug Lake 7950 8.4 5.6 150 10.4 8.0 130 Burts Miller Ranch 8000 2.4 -M * 3.4 -M * Chalk Creek #1 8993 9.6 9.2 104 12.0 10.5 114 Hayden Fork 9212 6.8 4.6 148 10.9 8.6 127 Kelley R.S. 8180 7.1 5.3 134 12.6 7.4 170 Lily Lake 9156 4.6 4.6 100 6.9 7.4 93 Monte Cristo 8960 9.3 9.0 103 13.0 10.4 125 Salt River Summit 7760 4.5 4.0 112 10.5 6.6 159 ----- ----- Basin Index (%) 119 130 ----------------------------------------------------------------------------- -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.