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 TUESDAY: DECEMBER 27 , 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 6.7 145 17.4 9.3 187 Black Bear 8170 15.0 16.1 93 24.4 16.5 148 Blind Bull Sum 8650 12.8 8.4 152 14.7 8.6 171 Cottonwood Creek 7670 9.2 7.8 118 15.9 10.4 153 East Rim Divide 7930 6.5 4.0 162 9.0 5.1 176 Grand Targhee 9260 22.1 16.6 133 21.4 14.1 152 Granite Creek 6770 9.0 5.7 158 15.3 8.6 178 Grassy Lake 7265 14.0 11.4 123 25.7 15.6 165 Gros Ventre Summit 8750 6.0 5.6 107 10.1 5.7 177 Gunsight Pass 9820 6.7 5.4 124 11.1 5.9 188 Lewis Lake Divide 7850 11.6 12.1 96 23.3 15.6 149 Phillips Bench 8200 10.5 9.9 106 19.7 11.8 167 Salt River Summit 7760 5.0 4.4 114 10.8 6.9 157 Snake River Station 6920 9.1 5.7 160 17.8 10.2 175 Spring Creek Divide 9000 11.4 8.9 128 16.9 10.0 169 Thumb Divide 7980 6.1 5.7 107 12.1 8.0 151 Togwotee Pass 9580 13.0 10.3 126 16.6 10.7 155 Two Ocean Plateau 9240 17.0 11.6 147 18.5 11.8 157 Willow Creek 8380 10.8 9.9 109 21.6 14.5 149 Younts Peak 8350 7.1 6.5 109 11.8 7.1 166 ----- ----- Basin Index (%) 123 162 MADISON-GALLATIN Black Bear 8170 15.0 16.1 93 24.4 16.5 148 Canyon 7870 6.3 4.9 129 12.4 7.3 170 Madison Plateau 7750 8.6 9.6 90 18.4 11.3 163 West Yellowstone 6700 5.1 4.2 121 12.5 6.4 195 Whiskey Creek 6800 5.5 5.9 93 13.3 9.0 148 ----- ----- Basin Index (%) 100 160 YELLOWSTONE Beartooth Lake 9360 11.2 9.3 120 5.6 8.5 66 Burnt Mtn 5880 3.2 1.9 168 7.0 6.6 106 Canyon 7870 6.3 4.9 129 12.4 7.3 170 Cole Creek 7850 4.6 6.0 77 4.5 6.2 73 Evening Star 9200 13.5 10.4 130 19.4 12.3 158 Fisher Creek 9100 13.0 13.8 94 18.2 14.0 130 Northeast Entrance 7350 4.4 3.4 129 9.7 5.8 167 Parker Peak 9400 11.7 9.1 129 14.8 8.0 185 Sylvan Lake 8420 9.2 8.6 107 19.4 10.5 185 Thumb Divide 7980 6.1 5.7 107 12.1 8.0 151 Two Ocean Plateau 9240 17.0 11.6 147 18.5 11.8 157 White Mill 8700 10.7 9.2 116 14.2 10.5 135 Wolverine 7650 6.3 4.4 143 10.0 5.9 169 ----- ----- Basin Index (%) 119 144 WIND RIVER Burroughs Creek 8750 7.7 -M * 10.3 -M * Castle Creek 8400 4.4 -M * 6.5 -M * Cold Springs 9630 3.9 3.0 130 6.2 4.7 132 Deer Park 9700 9.2 6.2 148 13.0 8.2 159 Hobbs Park 10100 7.7 6.2 124 8.4 5.9 142 Kirwin 9550 6.5 4.2 155 9.4 5.3 177 Little Warm 9370 3.8 4.2 90 8.4 5.8 145 Owl Creek 8975 2.6 2.4 108 4.0 2.8 143 South Pass 9040 8.5 6.1 139 8.9 7.9 113 St. Lawrence Alt 8620 1.8 2.9 62 5.5 4.2 131 Togwotee Pass 9580 13.0 10.3 126 16.6 10.7 155 Townsend Creek 8700 3.7 3.8 97 6.3 5.6 112 ----- ----- Basin Index (%) 123 142 BIGHORN BASIN Bald Mtn. 9380 10.3 7.7 134 9.0 7.5 120 Bear Trap Meadow 8200 2.0 2.5 80 3.5 4.1 85 Bone Springs Div 9350 7.3 7.0 104 8.0 6.8 118 Grave Springs 8550 2.7 3.1 87 3.9 4.9 80 Kirwin 9550 6.5 4.2 155 9.4 5.3 177 Marquette 8760 3.6 -M * 6.6 -M * Middle Powder 7760 3.4 4.7 72 3.6 5.9 61 Owl Creek 8975 2.6 2.4 108 4.0 2.8 143 Powder River Pass 9480 2.3 4.4 52 5.0 5.6 89 Shell Creek 9580 8.0 6.9 116 6.4 6.3 102 Timber Creek 7950 2.7 2.0 135 4.1 3.8 108 ----- ----- Basin Index (%) 106 107 SHOSHONE RIVER Blackwater 9780 14.8 10.0 148 18.0 9.4 191 Evening Star 9200 13.5 10.4 130 19.4 12.3 158 Marquette 8760 3.6 -M * 6.6 -M * Sylvan Road 7120 6.5 5.0 130 16.3 8.5 192 Younts Peak 8350 7.1 6.5 109 11.8 7.1 166 ----- ----- Basin Index (%) 131 176 POWDER RIVER Bear Trap Meadow 8200 2.0 2.5 80 3.5 4.1 85 Cloud Peak Reservoir 9860 5.1 5.8 88 7.2 6.0 120 Grave Springs 8550 2.7 3.1 87 3.9 4.9 80 Hansen Sawmill 8360 3.2 2.8 114 4.9 3.9 126 Middle Powder 7760 3.4 4.7 72 3.6 5.9 61 Powder River Pass 9480 2.3 4.4 52 5.0 5.6 89 Soldier Park 8720 3.9 -M * 5.5 -M * ----- ----- Basin Index (%) 80 92 TONGUE RIVER Big Goose 7990 4.0 3.5 114 5.1 5.2 98 Bone Springs Div 9350 7.3 7.0 104 8.0 6.8 118 Burgess Junction 7880 4.1 4.5 91 5.4 5.7 95 Dome Lake 8880 4.4 5.0 88 6.4 6.5 98 Little Goose 8870 4.5 -M * 6.5 -M * Sucker Creek 8880 4.9 4.8 102 5.3 6.5 82 Tie Creek 6870 3.1 1.8 172 6.0 5.4 111 ----- ----- Basin Index (%) 105 100 BELLE FOURCHE Cole Canyon 5910 2.7 1.8 150 3.7 4.5 82 ----- ----- Basin Index (%) 150 82 CHEYENNE RIVER BASIN Blind Park 6890 3.1 2.9 107 4.7 5.7 82 North Rapid Creek 6130 3.4 2.9 117 3.6 4.8 75 ----- ----- Basin Index (%) 112 79 UPPER N. PLATTE Arapaho Ridge 10960 10.6 8.9 119 12.3 10.2 121 Blackhall Mtn 9820 11.8 -M * 13.9 -M * Columbine 9160 9.8 8.2 120 11.9 10.9 109 Divide Peak 8880 6.3 7.8 81 8.9 9.8 91 Joe Wright 10120 7.4 9.0 82 12.4 11.6 107 Laprele Creek 8375 4.2 3.7 114 4.3 5.7 75 Med Bow 10500 15.1 -M * 15.6 -M * North French Creek 10130 9.5 10.8 88 11.5 11.4 101 Never Summer 10280 8.7 8.2 106 8.9 -M * Old Battle 10000 11.2 12.0 93 13.1 15.4 85 Rawah 9020 5.3 4.0 132 7.8 7.0 111 Sage Creek Basin 7850 4.7 5.2 90 6.2 6.8 91 Sand Lake 10050 10.6 10.8 98 10.2 10.6 96 South Brush Creek 8440 3.9 4.4 89 5.3 6.8 78 Tower 10500 13.7 18.3 75 17.5 17.3 101 Webber Springs 9250 8.5 9.0 94 9.8 11.7 84 Willow Creek Pass 9540 7.2 5.2 138 8.3 6.2 134 Zirkel 9340 11.3 8.9 127 15.0 12.6 119 ----- ----- Basin Index (%) 99 100 SWEETWATER Deer Park 9700 9.2 6.2 148 13.0 8.2 159 Larsen Creek 9000 6.7 4.5 149 10.7 -M * South Pass 9040 8.5 6.1 139 8.9 7.9 113 ----- ----- Basin Index (%) 145 136 LOWER N. PLATTE Casper Mtn. 7900 4.8 5.5 87 5.3 7.1 75 Laprele Creek 8375 4.2 3.7 114 4.3 5.7 75 Reno Hill 8400 -M 5.5 * -M 6.8 * Windy Peak 7900 3.4 3.0 113 4.2 5.0 84 ----- ----- Basin Index (%) 102 78 LARAMIE RIVER Brooklyn Lake 10240 7.5 7.4 101 7.9 8.8 90 Cinnabar Park 9574 7.0 8.1 86 9.7 10.6 92 Crow Creek 8330 2.4 4.0 60 3.8 5.3 72 Deadman Hill 10220 7.5 6.9 109 7.9 7.4 107 Rawah 9020 5.3 4.0 132 7.8 7.0 111 Roach 9700 5.4 6.6 82 7.1 8.5 84 ----- ----- Basin Index (%) 95 93 S. PLATTE Black Mountain 8920 4.1 -M * 5.4 -M * Crow Creek 8330 2.4 4.0 60 3.8 5.3 72 Deadman Hill 10220 7.5 6.9 109 7.9 7.4 107 ----- ----- Basin Index (%) 91 92 LITTLE SNAKE RIVER Battle Mountain 7440 4.0 3.5 114 -M 6.6 * Divide Peak 8880 6.3 7.8 81 8.9 9.8 91 Elk River 8700 8.0 6.1 131 9.1 8.6 106 Little Snake River 8915 11.2 8.1 138 16.4 13.8 119 Old Battle 10000 11.2 12.0 93 13.1 15.4 85 Sage Creek Basin 7850 4.7 5.2 90 6.2 6.8 91 Sandstone RS 8150 5.0 4.1 122 5.5 8.1 68 Whiskey Park 8950 9.3 8.8 106 12.6 11.3 112 ----- ----- Basin Index (%) 107 97 UPPER GREEN RIVER Big Sandy Opening 9080 7.9 5.3 149 10.7 5.9 181 Blind Bull Sum 8650 12.8 8.4 152 14.7 8.6 171 East Rim Divide 7930 6.5 4.0 162 9.0 5.1 176 Elkhart Park G.S. 9400 5.3 5.2 102 11.0 6.0 183 Gros Ventre Summit 8750 6.0 5.6 107 10.1 5.7 177 Gunsight Pass 9820 6.7 5.4 124 11.1 5.9 188 Kendall R.S. 7740 7.1 4.4 161 11.4 6.0 190 Loomis Park 8240 8.9 5.9 151 14.2 7.5 189 New Fork Lake 8340 6.0 4.2 143 6.7 4.8 140 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 5.6 4.8 117 10.8 6.1 177 Spring Creek Divide 9000 11.4 8.9 128 16.9 10.0 169 Triple Peak 8500 13.4 7.7 174 18.2 10.2 178 ----- ----- Basin Index (%) 140 177 LOWER GREEN RIVER Blacks Fork Jct 8870 4.2 -M * 6.2 -M * Buck Pasture 9700 6.5 -M * 9.7 -M * EF Blacks Fork GS 9360 6.1 -M * 6.0 -M * Hams Fork 7840 4.3 4.2 102 8.2 4.8 171 Hewinta 9519 4.4 3.4 129 6.5 6.2 105 Hickerson Park 9145 4.1 2.6 158 4.2 4.8 88 Hole-in-Rock 9150 2.8 2.8 100 4.7 4.5 104 Indian Creek 9425 10.9 9.7 112 15.1 9.1 166 Kelley R.S. 8180 7.5 5.8 129 13.1 7.8 168 Spirit Lk 10235 6.4 -M * 8.6 -M * Steel Creek Park 10200 6.6 6.0 110 8.5 7.1 120 ----- ----- Basin Index (%) 118 136 UPPER BEAR RIVER Bear River RS 8777 4.4 -M * 6.4 -M * Bug Lake 7950 -M 5.9 * 10.7 8.4 127 Burts Miller Ranch 8000 2.3 -M * 3.1 -M * Chalk Creek #1 8993 10.2 9.4 109 12.7 11.0 115 Hayden Fork 9212 7.7 5.1 151 12.0 9.0 133 Kelley R.S. 8180 7.5 5.8 129 13.1 7.8 168 Lily Lake 9156 4.9 4.8 102 7.6 7.7 99 Monte Cristo 8960 10.2 9.4 109 13.2 11.0 120 Salt River Summit 7760 5.0 4.4 114 10.8 6.9 157 ----- ----- Basin Index (%) 117 130 ----------------------------------------------------------------------------- -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.