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 THURSDAY: DECEMBER 22 , 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 6.0 157 17.0 8.7 195 Black Bear 8170 13.8 14.7 94 23.1 15.6 148 Blind Bull Sum 8650 12.5 7.9 158 14.2 8.1 175 Cottonwood Creek 7670 8.8 7.2 122 15.6 9.7 161 East Rim Divide 7930 5.0 3.6 139 8.3 4.8 173 Grand Targhee 9260 21.5 14.8 145 21.0 13.0 162 Granite Creek 6770 7.9 4.9 161 14.4 8.0 180 Grassy Lake 7265 13.3 10.4 128 24.9 14.4 173 Gros Ventre Summit 8750 5.3 5.0 106 9.4 5.4 174 Gunsight Pass 9820 6.2 4.5 138 10.4 5.5 189 Lewis Lake Divide 7850 11.1 10.7 104 22.7 14.5 157 Phillips Bench 8200 9.2 8.9 103 18.4 10.9 169 Salt River Summit 7760 4.6 3.9 118 10.5 6.5 162 Snake River Station 6920 8.8 5.3 166 17.6 9.5 185 Spring Creek Divide 9000 11.0 8.2 134 16.3 9.4 173 Thumb Divide 7980 5.6 5.2 108 11.6 7.6 153 Togwotee Pass 9580 12.6 9.7 130 16.2 10.1 160 Two Ocean Plateau 9240 16.8 10.9 154 18.2 11.2 162 Willow Creek 8380 10.4 9.2 113 21.2 13.6 156 Younts Peak 8350 6.9 5.9 117 11.5 6.7 172 ----- ----- Basin Index (%) 128 167 MADISON-GALLATIN Black Bear 8170 13.8 14.7 94 23.1 15.6 148 Canyon 7870 6.0 4.5 133 12.0 6.8 176 Madison Plateau 7750 7.5 8.9 84 17.4 10.6 164 West Yellowstone 6700 4.1 3.8 108 11.7 6.0 195 Whiskey Creek 6800 4.5 5.6 80 12.3 8.5 145 ----- ----- Basin Index (%) 96 161 YELLOWSTONE Beartooth Lake 9360 11.1 8.7 128 -M 8.0 * Burnt Mtn 5880 3.0 1.8 167 6.7 6.2 108 Canyon 7870 6.0 4.5 133 12.0 6.8 176 Cole Creek 7850 4.6 5.7 81 4.6 6.0 77 Evening Star 9200 13.2 9.6 138 19.3 11.6 166 Fisher Creek 9100 12.6 13.1 96 17.9 13.1 137 Northeast Entrance 7350 4.2 2.9 145 9.4 5.5 171 Parker Peak 9400 -M 8.5 * 14.5 7.6 191 Sylvan Lake 8420 9.0 8.0 112 19.0 9.9 192 Thumb Divide 7980 5.6 5.2 108 11.6 7.6 153 Two Ocean Plateau 9240 16.8 10.9 154 18.2 11.2 162 White Mill 8700 10.5 8.7 121 13.8 9.9 139 Wolverine 7650 -M 3.9 * -M 5.6 * ----- ----- Basin Index (%) 122 154 WIND RIVER Burroughs Creek 8750 7.4 -M * 9.7 -M * Castle Creek 8400 4.1 -M * 6.1 -M * Cold Springs 9630 3.6 2.9 124 6.0 4.5 133 Deer Park 9700 7.8 5.2 150 11.6 7.6 153 Hobbs Park 10100 -M 6.0 * 7.8 5.6 139 Kirwin 9550 6.1 4.1 149 8.9 5.0 178 Little Warm 9370 3.4 3.9 87 8.1 5.5 147 Owl Creek 8975 2.1 2.3 91 3.6 2.6 138 South Pass 9040 7.6 5.6 136 8.3 7.4 112 St. Lawrence Alt 8620 1.4 2.6 54 5.2 4.0 130 Togwotee Pass 9580 12.6 9.7 130 16.2 10.1 160 Townsend Creek 8700 3.0 3.4 88 5.7 5.3 108 ----- ----- Basin Index (%) 120 141 BIGHORN BASIN Bald Mtn. 9380 9.2 7.3 126 8.1 7.0 116 Bear Trap Meadow 8200 1.4 2.3 61 3.3 3.9 85 Bone Springs Div 9350 6.3 6.6 95 7.2 6.4 112 Grave Springs 8550 2.2 2.8 79 3.7 4.6 80 Kirwin 9550 6.1 4.1 149 8.9 5.0 178 Marquette 8760 3.3 -M * 6.4 -M * Middle Powder 7760 2.8 4.3 65 3.6 5.6 64 Owl Creek 8975 2.1 2.3 91 3.6 2.6 138 Powder River Pass 9480 1.6 4.0 40 4.5 5.3 85 Shell Creek 9580 6.8 6.5 105 6.0 5.9 102 Timber Creek 7950 2.5 1.9 132 4.0 3.7 108 ----- ----- Basin Index (%) 97 106 SHOSHONE RIVER Blackwater 9780 14.6 9.3 157 17.8 9.0 198 Evening Star 9200 13.2 9.6 138 19.3 11.6 166 Marquette 8760 3.3 -M * 6.4 -M * Sylvan Road 7120 6.2 4.5 138 16.0 8.1 198 Younts Peak 8350 6.9 5.9 117 11.5 6.7 172 ----- ----- Basin Index (%) 140 182 POWDER RIVER Bear Trap Meadow 8200 1.4 2.3 61 3.3 3.9 85 Cloud Peak Reservoir 9860 3.5 5.3 66 5.6 5.8 97 Grave Springs 8550 2.2 2.8 79 3.7 4.6 80 Hansen Sawmill 8360 2.4 2.6 92 4.1 3.7 111 Middle Powder 7760 2.8 4.3 65 3.6 5.6 64 Powder River Pass 9480 1.6 4.0 40 4.5 5.3 85 Soldier Park 8720 2.9 -M * 4.6 -M * ----- ----- Basin Index (%) 65 86 TONGUE RIVER Big Goose 7990 3.2 3.2 100 4.4 4.9 90 Bone Springs Div 9350 6.3 6.6 95 7.2 6.4 112 Burgess Junction 7880 3.4 4.1 83 5.0 5.4 93 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 4.1 4.4 93 5.0 6.1 82 Tie Creek 6870 2.6 1.4 186 5.5 5.1 108 ----- ----- Basin Index (%) 95 97 BELLE FOURCHE Cole Canyon 5910 2.1 1.1 191 3.4 4.2 81 ----- ----- Basin Index (%) 191 81 CHEYENNE RIVER BASIN Blind Park 6890 2.9 2.4 121 4.2 5.3 79 North Rapid Creek 6130 2.6 2.5 104 3.0 4.5 67 ----- ----- Basin Index (%) 112 73 UPPER N. PLATTE Arapaho Ridge 10960 9.5 8.3 114 11.3 9.7 116 Blackhall Mtn 9820 11.0 -M * 13.2 -M * Columbine 9160 8.8 7.7 114 11.3 10.2 111 Divide Peak 8880 5.7 7.1 80 8.2 9.2 89 Joe Wright 10120 6.7 8.6 78 11.5 10.9 106 Laprele Creek 8375 3.6 3.3 109 4.0 5.3 75 Med Bow 10500 13.9 -M * 14.5 -M * North French Creek 10130 8.6 10.3 83 10.7 10.7 100 Never Summer 10280 8.2 7.5 109 8.5 -M * Old Battle 10000 10.3 11.2 92 11.5 14.4 80 Rawah 9020 4.8 3.8 126 7.5 6.7 112 Sage Creek Basin 7850 4.1 4.7 87 5.5 6.3 87 Sand Lake 10050 9.6 10.0 96 9.6 10.0 96 South Brush Creek 8440 3.2 4.2 76 4.8 6.5 74 Tower 10500 12.9 17.7 73 16.2 16.4 99 Webber Springs 9250 7.9 8.4 94 11.3 11.0 103 Willow Creek Pass 9540 6.6 4.9 135 7.9 5.8 136 Zirkel 9340 10.5 8.1 130 14.3 12.0 119 ----- ----- Basin Index (%) 96 100 SWEETWATER Deer Park 9700 7.8 5.2 150 11.6 7.6 153 Larsen Creek 9000 5.7 4.1 139 9.9 -M * South Pass 9040 7.6 5.6 136 8.3 7.4 112 ----- ----- Basin Index (%) 142 133 LOWER N. PLATTE Casper Mtn. 7900 3.8 5.2 73 4.6 6.8 68 Laprele Creek 8375 3.6 3.3 109 4.0 5.3 75 Reno Hill 8400 -M 5.2 * -M 6.4 * Windy Peak 7900 3.2 2.8 114 4.0 4.7 85 ----- ----- Basin Index (%) 94 75 LARAMIE RIVER Brooklyn Lake 10240 7.0 7.1 99 7.5 8.2 91 Cinnabar Park 9574 6.5 7.6 86 9.2 10.0 92 Crow Creek 8330 2.0 3.9 51 3.7 4.9 76 Deadman Hill 10220 7.0 6.4 109 7.5 7.0 107 Rawah 9020 4.8 3.8 126 7.5 6.7 112 Roach 9700 5.0 5.9 85 6.7 7.9 85 ----- ----- Basin Index (%) 93 94 S. PLATTE Black Mountain 8920 3.6 -M * 5.2 -M * Crow Creek 8330 2.0 3.9 51 3.7 4.9 76 Deadman Hill 10220 7.0 6.4 109 7.5 7.0 107 ----- ----- Basin Index (%) 87 94 LITTLE SNAKE RIVER Battle Mountain 7440 3.3 3.2 103 6.2 6.3 98 Divide Peak 8880 5.7 7.1 80 8.2 9.2 89 Elk River 8700 7.2 5.6 129 8.4 8.0 105 Little Snake River 8915 10.1 7.0 144 15.0 12.9 116 Old Battle 10000 10.3 11.2 92 11.5 14.4 80 Sage Creek Basin 7850 4.1 4.7 87 5.5 6.3 87 Sandstone RS 8150 4.5 3.9 115 5.3 7.6 70 Whiskey Park 8950 8.3 8.2 101 11.5 10.6 108 ----- ----- Basin Index (%) 105 95 UPPER GREEN RIVER Big Sandy Opening 9080 7.2 4.8 150 10.0 5.5 182 Blind Bull Sum 8650 12.5 7.9 158 14.2 8.1 175 East Rim Divide 7930 5.0 3.6 139 8.3 4.8 173 Elkhart Park G.S. 9400 4.7 4.6 102 10.0 5.6 179 Gros Ventre Summit 8750 5.3 5.0 106 9.4 5.4 174 Gunsight Pass 9820 6.2 4.5 138 10.4 5.5 189 Kendall R.S. 7740 6.8 4.1 166 11.1 5.6 198 Loomis Park 8240 7.9 5.2 152 13.2 6.9 191 New Fork Lake 8340 5.2 3.7 141 6.1 4.5 136 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 5.0 4.4 114 10.2 5.7 179 Spring Creek Divide 9000 11.0 8.2 134 16.3 9.4 173 Triple Peak 8500 12.7 7.3 174 17.5 9.6 182 ----- ----- Basin Index (%) 141 178 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 5.3 -M * 5.8 -M * Hams Fork 7840 4.2 3.7 114 8.0 4.5 178 Hewinta 9519 3.9 3.2 122 6.3 5.9 107 Hickerson Park 9145 3.4 2.2 155 3.9 4.6 85 Hole-in-Rock 9150 2.3 2.5 92 4.2 4.2 100 Indian Creek 9425 10.2 8.9 115 14.3 8.6 166 Kelley R.S. 8180 7.0 5.1 137 12.6 7.3 173 Spirit Lk 10235 4.3 -M * 6.8 -M * Steel Creek Park 10200 6.0 5.7 105 7.9 6.8 116 ----- ----- Basin Index (%) 118 137 UPPER BEAR RIVER Bear River RS 8777 4.1 -M * 6.1 -M * Bug Lake 7950 8.7 5.5 158 10.3 7.9 130 Burts Miller Ranch 8000 2.4 -M * 3.4 -M * Chalk Creek #1 8993 9.7 9.1 107 12.0 10.3 117 Hayden Fork 9212 6.9 4.6 150 10.9 8.4 130 Kelley R.S. 8180 7.0 5.1 137 12.6 7.3 173 Lily Lake 9156 4.6 4.6 100 6.9 7.3 95 Monte Cristo 8960 9.2 8.8 105 12.9 10.2 126 Salt River Summit 7760 4.6 3.9 118 10.5 6.5 162 ----- ----- Basin Index (%) 122 131 ----------------------------------------------------------------------------- -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.