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 WEDNESDAY: DECEMBER 28 , 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 6.8 151 18.0 9.4 191 Black Bear 8170 15.7 16.5 95 24.9 16.8 148 Blind Bull Sum 8650 13.6 8.6 158 15.0 8.8 170 Cottonwood Creek 7670 9.5 7.9 120 16.5 10.5 157 East Rim Divide 7930 6.8 4.1 166 9.4 5.2 181 Grand Targhee 9260 23.2 16.9 137 21.9 14.4 152 Granite Creek 6770 9.4 5.8 162 15.7 8.8 178 Grassy Lake 7265 14.9 11.7 127 26.9 15.9 169 Gros Ventre Summit 8750 6.3 5.7 111 10.5 5.8 181 Gunsight Pass 9820 6.9 5.6 123 11.2 6.0 187 Lewis Lake Divide 7850 12.4 12.4 100 23.9 15.8 151 Phillips Bench 8200 11.2 10.1 111 20.0 12.0 167 Salt River Summit 7760 5.3 4.5 118 11.2 7.0 160 Snake River Station 6920 9.7 5.8 167 18.0 10.3 175 Spring Creek Divide 9000 11.9 9.2 129 17.3 10.2 170 Thumb Divide 7980 6.4 5.8 110 12.4 8.2 151 Togwotee Pass 9580 13.3 10.4 128 17.0 10.8 157 Two Ocean Plateau 9240 17.6 11.8 149 18.9 12.0 158 Willow Creek 8380 11.2 10.0 112 22.1 14.8 149 Younts Peak 8350 7.6 6.7 113 12.5 7.2 174 ----- ----- Basin Index (%) 127 164 MADISON-GALLATIN Black Bear 8170 15.7 16.5 95 24.9 16.8 148 Canyon 7870 6.5 5.0 130 12.7 7.4 172 Madison Plateau 7750 9.1 9.8 93 18.9 11.5 164 West Yellowstone 6700 5.4 4.3 126 12.8 6.6 194 Whiskey Creek 6800 5.9 6.0 98 13.7 9.1 151 ----- ----- Basin Index (%) 102 161 YELLOWSTONE Beartooth Lake 9360 11.5 9.4 122 -M 8.7 * Burnt Mtn 5880 3.2 1.9 168 7.1 6.6 108 Canyon 7870 6.5 5.0 130 12.7 7.4 172 Cole Creek 7850 4.6 6.1 75 4.6 6.3 73 Evening Star 9200 13.9 10.6 131 19.7 12.5 158 Fisher Creek 9100 13.5 14.0 96 18.6 14.2 131 Northeast Entrance 7350 4.5 3.6 125 9.8 5.8 169 Parker Peak 9400 12.1 9.3 130 15.1 8.1 186 Sylvan Lake 8420 9.4 8.8 107 19.7 10.6 186 Thumb Divide 7980 6.4 5.8 110 12.4 8.2 151 Two Ocean Plateau 9240 17.6 11.8 149 18.9 12.0 158 White Mill 8700 11.1 9.3 119 14.4 10.7 135 Wolverine 7650 6.6 4.4 150 10.3 6.0 172 ----- ----- Basin Index (%) 121 151 WIND RIVER Burroughs Creek 8750 8.1 -M * 10.6 -M * Castle Creek 8400 4.7 -M * 6.9 -M * Cold Springs 9630 4.1 3.0 137 6.3 4.8 131 Deer Park 9700 9.5 6.4 148 13.3 8.2 162 Hobbs Park 10100 7.9 6.2 127 8.5 6.0 142 Kirwin 9550 6.7 4.2 160 9.6 5.3 181 Little Warm 9370 3.9 4.2 93 8.6 5.9 146 Owl Creek 8975 2.6 2.4 108 4.0 2.8 143 South Pass 9040 9.0 6.2 145 9.3 7.9 118 St. Lawrence Alt 8620 1.9 2.9 66 5.6 4.2 133 Togwotee Pass 9580 13.3 10.4 128 17.0 10.8 157 Townsend Creek 8700 3.9 3.8 103 6.6 5.6 118 ----- ----- Basin Index (%) 126 144 BIGHORN BASIN Bald Mtn. 9380 10.3 7.8 132 9.1 7.6 120 Bear Trap Meadow 8200 2.0 2.5 80 3.6 4.1 88 Bone Springs Div 9350 7.4 7.0 106 8.1 6.9 117 Grave Springs 8550 2.8 3.1 90 4.0 4.9 82 Kirwin 9550 6.7 4.2 160 9.6 5.3 181 Marquette 8760 3.5 -M * 6.6 -M * Middle Powder 7760 3.4 4.7 72 3.8 5.9 64 Owl Creek 8975 2.6 2.4 108 4.0 2.8 143 Powder River Pass 9480 2.3 4.5 51 5.1 5.7 89 Shell Creek 9580 8.2 7.0 117 6.6 6.3 105 Timber Creek 7950 2.8 2.1 133 4.2 3.8 111 ----- ----- Basin Index (%) 107 109 SHOSHONE RIVER Blackwater 9780 15.1 10.1 150 17.9 9.5 188 Evening Star 9200 13.9 10.6 131 19.7 12.5 158 Marquette 8760 3.5 -M * 6.6 -M * Sylvan Road 7120 6.6 5.0 132 16.5 8.6 192 Younts Peak 8350 7.6 6.7 113 12.5 7.2 174 ----- ----- Basin Index (%) 133 176 POWDER RIVER Bear Trap Meadow 8200 2.0 2.5 80 3.6 4.1 88 Cloud Peak Reservoir 9860 5.1 5.9 86 7.2 6.1 118 Grave Springs 8550 2.8 3.1 90 4.0 4.9 82 Hansen Sawmill 8360 3.3 2.8 118 4.9 4.0 122 Middle Powder 7760 3.4 4.7 72 3.8 5.9 64 Powder River Pass 9480 2.3 4.5 51 5.1 5.7 89 Soldier Park 8720 4.3 -M * 5.5 -M * ----- ----- Basin Index (%) 80 93 TONGUE RIVER Big Goose 7990 4.1 3.5 117 5.1 5.2 98 Bone Springs Div 9350 7.4 7.0 106 8.1 6.9 117 Burgess Junction 7880 4.1 4.5 91 5.4 5.7 95 Dome Lake 8880 4.5 5.1 88 6.5 6.5 100 Little Goose 8870 4.5 -M * 6.5 -M * Sucker Creek 8880 4.9 4.9 100 5.4 6.5 83 Tie Creek 6870 3.0 1.8 167 6.0 5.4 111 ----- ----- Basin Index (%) 104 101 BELLE FOURCHE Cole Canyon 5910 2.7 1.9 142 3.8 4.5 84 ----- ----- Basin Index (%) 142 84 CHEYENNE RIVER BASIN Blind Park 6890 3.2 3.0 107 4.8 5.8 83 North Rapid Creek 6130 3.5 3.0 117 3.8 4.8 79 ----- ----- Basin Index (%) 112 81 UPPER N. PLATTE Arapaho Ridge 10960 10.8 9.0 120 12.5 10.4 120 Blackhall Mtn 9820 12.1 -M * 14.3 -M * Columbine 9160 10.0 8.3 120 12.4 11.1 112 Divide Peak 8880 6.3 8.0 79 9.0 9.9 91 Joe Wright 10120 7.7 9.1 85 12.7 11.7 109 Laprele Creek 8375 4.4 3.8 116 4.4 5.8 76 Med Bow 10500 15.4 -M * 15.9 -M * North French Creek 10130 9.6 11.0 87 11.6 11.5 101 Never Summer 10280 9.0 8.3 108 9.0 -M * Old Battle 10000 11.4 12.1 94 13.3 15.6 85 Rawah 9020 5.3 4.0 132 8.1 7.0 116 Sage Creek Basin 7850 4.9 5.4 91 6.3 6.9 91 Sand Lake 10050 10.9 11.0 99 10.6 10.8 98 South Brush Creek 8440 3.9 4.4 89 5.5 6.9 80 Tower 10500 13.8 18.3 75 17.8 17.6 101 Webber Springs 9250 8.8 9.1 97 12.3 11.8 104 Willow Creek Pass 9540 7.3 5.3 138 8.5 6.3 135 Zirkel 9340 11.5 9.2 125 15.3 12.7 120 ----- ----- Basin Index (%) 99 103 SWEETWATER Deer Park 9700 9.5 6.4 148 13.3 8.2 162 Larsen Creek 9000 7.0 4.6 152 11.2 -M * South Pass 9040 9.0 6.2 145 9.3 7.9 118 ----- ----- Basin Index (%) 148 140 LOWER N. PLATTE Casper Mtn. 7900 4.9 5.5 89 5.4 7.2 75 Laprele Creek 8375 4.4 3.8 116 4.4 5.8 76 Reno Hill 8400 -M 5.6 * -M 6.9 * Windy Peak 7900 3.3 3.0 110 4.4 5.0 88 ----- ----- Basin Index (%) 102 79 LARAMIE RIVER Brooklyn Lake 10240 7.9 7.5 105 8.2 8.8 93 Cinnabar Park 9574 7.1 8.3 86 9.8 10.7 92 Crow Creek 8330 2.3 4.1 56 4.1 5.3 77 Deadman Hill 10220 7.7 7.0 110 8.0 7.5 107 Rawah 9020 5.3 4.0 132 8.1 7.0 116 Roach 9700 5.5 6.7 82 7.2 8.6 84 ----- ----- Basin Index (%) 95 95 S. PLATTE Black Mountain 8920 4.2 -M * 5.5 -M * Crow Creek 8330 2.3 4.1 56 4.1 5.3 77 Deadman Hill 10220 7.7 7.0 110 8.0 7.5 107 ----- ----- Basin Index (%) 90 95 LITTLE SNAKE RIVER Battle Mountain 7440 3.8 3.6 106 6.7 6.7 100 Divide Peak 8880 6.3 8.0 79 9.0 9.9 91 Elk River 8700 8.0 6.2 129 9.2 8.7 106 Little Snake River 8915 11.4 8.4 136 16.6 13.9 119 Old Battle 10000 11.4 12.1 94 13.3 15.6 85 Sage Creek Basin 7850 4.9 5.4 91 6.3 6.9 91 Sandstone RS 8150 5.0 4.2 119 5.7 8.2 70 Whiskey Park 8950 9.5 9.0 106 12.8 11.4 112 ----- ----- Basin Index (%) 106 98 UPPER GREEN RIVER Big Sandy Opening 9080 8.3 5.4 154 11.1 5.9 188 Blind Bull Sum 8650 13.6 8.6 158 15.0 8.8 170 East Rim Divide 7930 6.8 4.1 166 9.4 5.2 181 Elkhart Park G.S. 9400 5.6 5.4 104 11.2 6.1 184 Gros Ventre Summit 8750 6.3 5.7 111 10.5 5.8 181 Gunsight Pass 9820 6.9 5.6 123 11.2 6.0 187 Kendall R.S. 7740 7.6 4.5 169 11.9 6.1 195 Loomis Park 8240 9.4 6.0 157 14.7 7.6 193 New Fork Lake 8340 6.4 4.3 149 7.0 4.9 143 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 6.1 4.8 127 11.3 6.2 182 Spring Creek Divide 9000 11.9 9.2 129 17.3 10.2 170 Triple Peak 8500 13.8 7.8 177 18.7 10.3 182 ----- ----- Basin Index (%) 144 180 LOWER GREEN RIVER Blacks Fork Jct 8870 4.7 -M * 6.4 -M * Buck Pasture 9700 6.8 -M * 9.8 -M * EF Blacks Fork GS 9360 7.0 -M * 6.1 -M * Hams Fork 7840 5.0 4.3 116 8.7 4.9 178 Hewinta 9519 4.7 3.5 134 6.8 6.2 110 Hickerson Park 9145 4.4 2.6 169 4.8 4.8 100 Hole-in-Rock 9150 3.1 2.9 107 4.8 4.5 107 Indian Creek 9425 11.4 9.8 116 15.7 9.2 171 Kelley R.S. 8180 8.0 5.9 136 13.5 7.9 171 Spirit Lk 10235 6.5 -M * 8.8 -M * Steel Creek Park 10200 6.9 6.0 115 8.6 7.2 119 ----- ----- Basin Index (%) 124 141 UPPER BEAR RIVER Bear River RS 8777 4.5 -M * 6.6 -M * Bug Lake 7950 -M 6.0 * 10.8 8.5 127 Burts Miller Ranch 8000 2.3 -M * 3.6 -M * Chalk Creek #1 8993 10.4 9.5 109 12.7 11.0 115 Hayden Fork 9212 7.8 5.3 147 12.0 9.1 132 Kelley R.S. 8180 8.0 5.9 136 13.5 7.9 171 Lily Lake 9156 5.1 4.9 104 7.6 7.7 99 Monte Cristo 8960 10.3 9.6 107 13.4 11.1 121 Salt River Summit 7760 5.3 4.5 118 11.2 7.0 160 ----- ----- Basin Index (%) 118 130 ----------------------------------------------------------------------------- -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.