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 30 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 10.3 7.0 147 18.0 9.8 184 Black Bear 8170 15.7 17.2 91 25.1 17.4 144 Blind Bull Sum 8650 13.6 8.9 153 15.0 9.1 165 Cottonwood Creek 7670 9.6 8.2 117 16.6 10.9 152 East Rim Divide 7930 6.9 4.2 164 9.5 5.4 176 Grand Targhee 9260 23.3 17.3 135 22.1 14.6 151 Granite Creek 6770 9.4 6.2 152 15.7 9.2 171 Grassy Lake 7265 14.9 12.2 122 26.5 16.6 160 Gros Ventre Summit 8750 6.2 6.0 103 10.5 6.0 175 Gunsight Pass 9820 7.0 5.9 119 11.3 6.3 179 Lewis Lake Divide 7850 12.3 12.9 95 24.0 16.5 145 Phillips Bench 8200 11.3 10.6 107 20.7 12.5 166 Salt River Summit 7760 5.4 4.7 115 11.3 7.3 155 Snake River Station 6920 9.7 6.0 162 18.4 10.8 170 Spring Creek Divide 9000 12.2 9.7 126 17.6 10.5 168 Thumb Divide 7980 6.5 6.0 108 12.5 8.5 147 Togwotee Pass 9580 13.6 10.8 126 17.3 11.2 154 Two Ocean Plateau 9240 -M 12.2 * -M 12.4 * Willow Creek 8380 11.3 10.4 109 22.3 15.2 147 Younts Peak 8350 7.9 6.9 114 12.7 7.6 167 ----- ----- Basin Index (%) 121 159 MADISON-GALLATIN Black Bear 8170 15.7 17.2 91 25.1 17.4 144 Canyon 7870 6.6 5.2 127 12.9 7.7 168 Madison Plateau 7750 9.2 10.1 91 18.9 12.1 156 West Yellowstone 6700 5.5 4.5 122 12.9 6.9 187 Whiskey Creek 6800 6.0 6.4 94 13.8 9.5 145 ----- ----- Basin Index (%) 99 156 YELLOWSTONE Beartooth Lake 9360 11.7 9.7 121 9.6 9.0 107 Burnt Mtn 5880 3.2 1.9 168 7.1 6.7 106 Canyon 7870 6.6 5.2 127 12.9 7.7 168 Cole Creek 7850 4.7 6.3 75 4.7 6.3 75 Evening Star 9200 14.0 11.0 127 20.2 12.9 157 Fisher Creek 9100 13.4 14.3 94 18.8 14.7 128 Northeast Entrance 7350 4.5 3.8 118 9.8 6.0 163 Parker Peak 9400 12.2 9.6 127 15.2 8.3 183 Sylvan Lake 8420 9.4 9.0 104 19.7 10.9 181 Thumb Divide 7980 6.5 6.0 108 12.5 8.5 147 Two Ocean Plateau 9240 -M 12.2 * -M 12.4 * White Mill 8700 11.1 9.6 116 14.6 11.1 132 Wolverine 7650 6.9 4.6 150 10.6 6.1 174 ----- ----- Basin Index (%) 115 144 WIND RIVER Burroughs Creek 8750 8.1 -M * 10.9 -M * Castle Creek 8400 4.7 -M * 6.9 -M * Cold Springs 9630 4.2 3.1 135 6.7 4.9 137 Deer Park 9700 9.7 6.6 147 13.7 8.6 159 Hobbs Park 10100 8.1 6.4 127 8.8 6.1 144 Kirwin 9550 6.8 4.3 158 9.9 5.5 180 Little Warm 9370 4.1 4.4 93 9.0 6.1 148 Owl Creek 8975 2.7 2.5 108 4.1 2.8 146 South Pass 9040 9.2 6.5 142 9.6 8.1 119 St. Lawrence Alt 8620 2.0 3.0 67 5.6 4.2 133 Togwotee Pass 9580 13.6 10.8 126 17.3 11.2 154 Townsend Creek 8700 4.0 4.0 100 6.8 5.7 119 ----- ----- Basin Index (%) 125 145 BIGHORN BASIN Bald Mtn. 9380 10.4 8.2 127 9.3 7.8 119 Bear Trap Meadow 8200 2.0 2.5 80 3.7 4.2 88 Bone Springs Div 9350 7.5 7.2 104 8.0 7.0 114 Grave Springs 8550 2.9 3.2 91 4.2 5.0 84 Kirwin 9550 6.8 4.3 158 9.9 5.5 180 Marquette 8760 3.6 -M * 7.1 -M * Middle Powder 7760 3.5 4.8 73 3.9 6.0 65 Owl Creek 8975 2.7 2.5 108 4.1 2.8 146 Powder River Pass 9480 2.3 4.6 50 5.2 5.8 90 Shell Creek 9580 8.3 7.1 117 6.8 6.4 106 Timber Creek 7950 2.9 2.1 138 4.1 3.9 105 ----- ----- Basin Index (%) 106 109 SHOSHONE RIVER Blackwater 9780 15.1 10.4 145 18.0 9.7 186 Evening Star 9200 14.0 11.0 127 20.2 12.9 157 Marquette 8760 3.6 -M * 7.1 -M * Sylvan Road 7120 6.6 5.2 127 16.5 8.8 188 Younts Peak 8350 7.9 6.9 114 12.7 7.6 167 ----- ----- Basin Index (%) 130 173 POWDER RIVER Bear Trap Meadow 8200 2.0 2.5 80 3.7 4.2 88 Cloud Peak Reservoir 9860 5.2 6.1 85 7.4 6.2 119 Grave Springs 8550 2.9 3.2 91 4.2 5.0 84 Hansen Sawmill 8360 3.3 2.9 114 5.0 4.0 125 Middle Powder 7760 3.5 4.8 73 3.9 6.0 65 Powder River Pass 9480 2.3 4.6 50 5.2 5.8 90 Soldier Park 8720 4.5 -M * 5.6 -M * ----- ----- Basin Index (%) 80 94 TONGUE RIVER Big Goose 7990 4.0 3.6 111 5.0 5.2 96 Bone Springs Div 9350 7.5 7.2 104 8.0 7.0 114 Burgess Junction 7880 4.2 4.6 91 5.5 5.8 95 Dome Lake 8880 4.7 5.3 89 6.6 6.6 100 Little Goose 8870 4.6 -M * 6.7 -M * Sucker Creek 8880 5.0 5.0 100 5.7 6.6 86 Tie Creek 6870 3.1 1.9 163 6.1 5.5 111 ----- ----- Basin Index (%) 103 101 BELLE FOURCHE Cole Canyon 5910 2.7 2.1 129 3.8 4.6 83 ----- ----- Basin Index (%) 129 83 CHEYENNE RIVER BASIN Blind Park 6890 3.1 3.2 97 4.4 6.0 73 North Rapid Creek 6130 3.5 3.1 113 3.8 5.0 76 ----- ----- Basin Index (%) 105 75 UPPER N. PLATTE Arapaho Ridge 10960 11.3 9.2 123 12.9 10.6 122 Blackhall Mtn 9820 12.7 -M * 14.8 -M * Columbine 9160 10.6 8.6 123 12.7 11.3 112 Divide Peak 8880 6.4 8.3 77 9.1 10.1 90 Joe Wright 10120 7.6 9.3 82 13.0 11.8 110 Laprele Creek 8375 4.4 3.9 113 4.5 5.9 76 Med Bow 10500 16.4 -M * 16.6 -M * North French Creek 10130 9.9 11.3 88 11.8 11.8 100 Never Summer 10280 -M 8.5 * -M -M * Old Battle 10000 11.8 12.3 96 13.7 16.0 86 Rawah 9020 5.5 4.2 131 8.1 7.2 112 Sage Creek Basin 7850 4.9 5.6 88 6.3 7.2 88 Sand Lake 10050 11.3 11.4 99 11.2 11.0 102 South Brush Creek 8440 3.9 4.6 85 5.4 7.0 77 Tower 10500 14.7 18.5 79 18.5 18.0 103 Webber Springs 9250 9.1 9.3 98 12.7 12.2 104 Willow Creek Pass 9540 7.4 5.4 137 8.5 6.4 133 Zirkel 9340 12.5 9.6 130 16.3 13.2 123 ----- ----- Basin Index (%) 100 103 SWEETWATER Deer Park 9700 9.7 6.6 147 13.7 8.6 159 Larsen Creek 9000 7.3 4.7 155 11.3 -M * South Pass 9040 9.2 6.5 142 9.6 8.1 119 ----- ----- Basin Index (%) 147 140 LOWER N. PLATTE Casper Mtn. 7900 5.0 5.7 88 5.5 7.3 75 Laprele Creek 8375 4.4 3.9 113 4.5 5.9 76 Reno Hill 8400 -M 5.7 * -M 7.0 * Windy Peak 7900 3.3 3.0 110 4.4 5.1 86 ----- ----- Basin Index (%) 101 79 LARAMIE RIVER Brooklyn Lake 10240 8.7 7.7 113 8.9 9.1 98 Cinnabar Park 9574 7.7 8.7 89 10.4 11.2 93 Crow Creek 8330 2.3 4.3 53 4.1 5.4 76 Deadman Hill 10220 8.0 7.1 113 8.2 7.6 108 Rawah 9020 5.5 4.2 131 8.1 7.2 112 Roach 9700 5.8 6.8 85 7.5 8.8 85 ----- ----- Basin Index (%) 98 96 S. PLATTE Black Mountain 8920 4.4 -M * 5.6 -M * Crow Creek 8330 2.3 4.3 53 4.1 5.4 76 Deadman Hill 10220 8.0 7.1 113 8.2 7.6 108 ----- ----- Basin Index (%) 90 95 LITTLE SNAKE RIVER Battle Mountain 7440 4.1 3.9 105 -M 6.8 * Divide Peak 8880 6.4 8.3 77 9.1 10.1 90 Elk River 8700 8.4 6.5 129 9.5 8.9 107 Little Snake River 8915 11.6 8.7 133 16.8 14.5 116 Old Battle 10000 11.8 12.3 96 13.7 16.0 86 Sage Creek Basin 7850 4.9 5.6 88 6.3 7.2 88 Sandstone RS 8150 5.1 4.2 121 5.6 8.3 67 Whiskey Park 8950 10.0 9.3 108 13.3 11.7 114 ----- ----- Basin Index (%) 106 97 UPPER GREEN RIVER Big Sandy Opening 9080 8.5 5.7 149 11.2 6.2 181 Blind Bull Sum 8650 13.6 8.9 153 15.0 9.1 165 East Rim Divide 7930 6.9 4.2 164 9.5 5.4 176 Elkhart Park G.S. 9400 5.8 5.6 104 11.3 6.3 179 Gros Ventre Summit 8750 6.2 6.0 103 10.5 6.0 175 Gunsight Pass 9820 7.0 5.9 119 11.3 6.3 179 Kendall R.S. 7740 7.5 4.7 160 11.8 6.4 184 Loomis Park 8240 9.4 6.4 147 14.7 8.0 184 New Fork Lake 8340 6.3 4.4 143 7.1 5.0 142 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 6.3 5.0 126 11.6 6.4 181 Spring Creek Divide 9000 12.2 9.7 126 17.6 10.5 168 Triple Peak 8500 14.1 8.0 176 19.0 10.7 178 ----- ----- Basin Index (%) 139 175 LOWER GREEN RIVER Blacks Fork Jct 8870 4.6 -M * 6.6 -M * Buck Pasture 9700 6.9 -M * 10.0 -M * EF Blacks Fork GS 9360 6.9 -M * 6.1 -M * Hams Fork 7840 5.0 4.4 114 8.7 5.0 174 Hewinta 9519 4.8 3.6 133 7.0 6.3 111 Hickerson Park 9145 4.3 2.8 154 4.6 4.9 94 Hole-in-Rock 9150 3.0 2.9 103 5.0 4.6 109 Indian Creek 9425 11.6 9.9 117 16.1 9.6 168 Kelley R.S. 8180 8.0 6.1 131 13.6 8.2 166 Spirit Lk 10235 6.5 -M * 8.6 -M * Steel Creek Park 10200 6.9 6.1 113 8.8 7.4 119 ----- ----- Basin Index (%) 122 139 UPPER BEAR RIVER Bear River RS 8777 4.6 -M * 6.7 -M * Bug Lake 7950 -M 6.2 * 10.9 8.8 124 Burts Miller Ranch 8000 2.3 -M * 3.5 -M * Chalk Creek #1 8993 10.4 9.6 108 12.9 11.3 114 Hayden Fork 9212 7.9 5.7 139 12.2 9.3 131 Kelley R.S. 8180 8.0 6.1 131 13.6 8.2 166 Lily Lake 9156 5.2 5.0 104 7.8 7.8 100 Monte Cristo 8960 10.4 9.8 106 14.0 11.4 123 Salt River Summit 7760 5.4 4.7 115 11.3 7.3 155 ----- ----- Basin Index (%) 116 129 ----------------------------------------------------------------------------- -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.