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 29 , 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 6.9 149 17.9 9.6 186 Black Bear 8170 15.7 16.8 93 24.9 17.0 146 Blind Bull Sum 8650 13.3 8.8 151 14.9 8.9 167 Cottonwood Creek 7670 9.6 8.0 120 16.3 10.7 152 East Rim Divide 7930 6.9 4.2 164 9.4 5.3 177 Grand Targhee 9260 23.1 17.2 134 21.8 14.6 149 Granite Creek 6770 9.4 6.0 157 15.8 9.0 176 Grassy Lake 7265 14.9 11.9 125 26.5 16.2 164 Gros Ventre Summit 8750 6.2 5.9 105 10.3 5.9 175 Gunsight Pass 9820 6.8 5.8 117 11.1 6.2 179 Lewis Lake Divide 7850 12.2 12.6 97 23.9 16.1 148 Phillips Bench 8200 11.2 10.4 108 20.1 12.2 165 Salt River Summit 7760 5.3 4.6 115 11.1 7.2 154 Snake River Station 6920 9.7 5.8 167 18.4 10.5 175 Spring Creek Divide 9000 12.1 9.4 129 17.5 10.4 168 Thumb Divide 7980 6.4 5.9 108 12.3 8.3 148 Togwotee Pass 9580 13.5 10.6 127 17.2 11.0 156 Two Ocean Plateau 9240 17.6 12.0 147 18.8 12.1 155 Willow Creek 8380 11.2 10.2 110 22.2 15.0 148 Younts Peak 8350 7.6 6.8 112 12.4 7.4 168 ----- ----- Basin Index (%) 124 160 MADISON-GALLATIN Black Bear 8170 15.7 16.8 93 24.9 17.0 146 Canyon 7870 6.7 5.1 131 12.7 7.5 169 Madison Plateau 7750 9.1 9.9 92 18.9 11.8 160 West Yellowstone 6700 5.4 4.4 123 12.9 6.7 193 Whiskey Creek 6800 5.9 6.2 95 13.8 9.3 148 ----- ----- Basin Index (%) 101 159 YELLOWSTONE Beartooth Lake 9360 11.6 9.6 121 -M 8.8 * Burnt Mtn 5880 3.2 1.9 168 7.0 6.6 106 Canyon 7870 6.7 5.1 131 12.7 7.5 169 Cole Creek 7850 4.6 6.2 74 4.5 6.3 71 Evening Star 9200 13.8 10.7 129 20.0 12.6 159 Fisher Creek 9100 13.3 14.1 94 18.7 14.4 130 Northeast Entrance 7350 4.5 3.7 122 9.8 5.9 166 Parker Peak 9400 11.9 9.4 127 15.0 8.2 183 Sylvan Lake 8420 9.4 8.9 106 19.6 10.8 181 Thumb Divide 7980 6.4 5.9 108 12.3 8.3 148 Two Ocean Plateau 9240 17.6 12.0 147 18.8 12.1 155 White Mill 8700 11.1 9.4 118 14.5 10.8 134 Wolverine 7650 6.8 4.5 151 10.3 6.0 172 ----- ----- Basin Index (%) 119 149 WIND RIVER Burroughs Creek 8750 8.1 -M * 10.5 -M * Castle Creek 8400 4.7 -M * 6.7 -M * Cold Springs 9630 4.0 3.0 133 6.3 4.8 131 Deer Park 9700 9.6 6.6 145 13.5 8.4 161 Hobbs Park 10100 -M 6.3 * 8.3 6.0 138 Kirwin 9550 6.6 4.2 157 9.6 5.4 178 Little Warm 9370 3.9 4.3 91 8.7 6.0 145 Owl Creek 8975 2.5 2.4 104 4.0 2.8 143 South Pass 9040 9.1 6.3 144 9.3 8.1 115 St. Lawrence Alt 8620 1.5 2.9 52 5.5 4.2 131 Togwotee Pass 9580 13.5 10.6 127 17.2 11.0 156 Townsend Creek 8700 3.7 3.9 95 6.3 5.7 111 ----- ----- Basin Index (%) 123 142 BIGHORN BASIN Bald Mtn. 9380 10.3 8.0 129 9.0 7.6 118 Bear Trap Meadow 8200 1.9 2.5 76 3.5 4.2 83 Bone Springs Div 9350 7.6 7.1 107 7.9 6.9 114 Grave Springs 8550 2.8 3.2 88 3.9 5.0 78 Kirwin 9550 6.6 4.2 157 9.6 5.4 178 Marquette 8760 3.4 -M * 6.7 -M * Middle Powder 7760 3.4 4.8 71 3.6 6.0 60 Owl Creek 8975 2.5 2.4 104 4.0 2.8 143 Powder River Pass 9480 2.3 4.5 51 4.9 5.7 86 Shell Creek 9580 8.0 7.0 114 6.6 6.4 103 Timber Creek 7950 2.7 2.1 129 4.1 3.8 108 ----- ----- Basin Index (%) 105 106 SHOSHONE RIVER Blackwater 9780 15.0 10.2 147 17.8 9.6 185 Evening Star 9200 13.8 10.7 129 20.0 12.6 159 Marquette 8760 3.4 -M * 6.7 -M * Sylvan Road 7120 6.6 5.1 129 16.5 8.7 190 Younts Peak 8350 7.6 6.8 112 12.4 7.4 168 ----- ----- Basin Index (%) 131 174 POWDER RIVER Bear Trap Meadow 8200 1.9 2.5 76 3.5 4.2 83 Cloud Peak Reservoir 9860 5.0 6.0 83 7.1 6.1 116 Grave Springs 8550 2.8 3.2 88 3.9 5.0 78 Hansen Sawmill 8360 3.2 2.9 110 4.9 4.0 122 Middle Powder 7760 3.4 4.8 71 3.6 6.0 60 Powder River Pass 9480 2.3 4.5 51 4.9 5.7 86 Soldier Park 8720 4.2 -M * 5.4 -M * ----- ----- Basin Index (%) 78 90 TONGUE RIVER Big Goose 7990 4.0 3.6 111 5.0 5.2 96 Bone Springs Div 9350 7.6 7.1 107 7.9 6.9 114 Burgess Junction 7880 4.1 4.6 89 5.4 5.8 93 Dome Lake 8880 4.5 5.2 87 6.4 6.6 97 Little Goose 8870 4.4 -M * 6.4 -M * Sucker Creek 8880 4.9 5.0 98 5.3 6.6 80 Tie Creek 6870 3.0 1.9 158 5.9 5.5 107 ----- ----- Basin Index (%) 103 98 BELLE FOURCHE Cole Canyon 5910 2.7 2.0 135 3.7 4.6 80 ----- ----- Basin Index (%) 135 80 CHEYENNE RIVER BASIN Blind Park 6890 3.1 3.1 100 4.7 5.8 81 North Rapid Creek 6130 3.4 3.1 110 3.7 4.9 76 ----- ----- Basin Index (%) 105 79 UPPER N. PLATTE Arapaho Ridge 10960 11.3 9.1 124 12.9 10.4 124 Blackhall Mtn 9820 12.7 -M * 14.8 -M * Columbine 9160 10.6 8.4 126 12.8 11.2 114 Divide Peak 8880 6.3 8.1 78 9.0 10.0 90 Joe Wright 10120 7.5 9.2 82 13.0 11.8 110 Laprele Creek 8375 4.2 3.8 111 4.3 5.8 74 Med Bow 10500 16.4 -M * 16.6 -M * North French Creek 10130 9.9 11.1 89 11.8 11.6 102 Never Summer 10280 -M 8.4 * -M -M * Old Battle 10000 11.7 12.2 96 13.5 15.8 85 Rawah 9020 5.5 4.1 134 7.9 7.1 111 Sage Creek Basin 7850 4.8 5.5 87 6.3 7.0 90 Sand Lake 10050 11.2 11.2 100 10.9 10.9 100 South Brush Creek 8440 3.9 4.5 87 5.3 7.0 76 Tower 10500 14.6 18.4 79 18.1 17.8 102 Webber Springs 9250 9.0 9.2 98 10.5 12.0 88 Willow Creek Pass 9540 7.4 5.3 140 8.6 6.3 137 Zirkel 9340 12.5 9.4 133 16.2 12.8 127 ----- ----- Basin Index (%) 101 102 SWEETWATER Deer Park 9700 9.6 6.6 145 13.5 8.4 161 Larsen Creek 9000 7.1 4.7 151 11.2 -M * South Pass 9040 9.1 6.3 144 9.3 8.1 115 ----- ----- Basin Index (%) 147 138 LOWER N. PLATTE Casper Mtn. 7900 4.9 5.6 88 5.4 7.3 74 Laprele Creek 8375 4.2 3.8 111 4.3 5.8 74 Reno Hill 8400 -M 5.6 * -M 6.9 * Windy Peak 7900 3.3 3.0 110 4.3 5.1 84 ----- ----- Basin Index (%) 100 77 LARAMIE RIVER Brooklyn Lake 10240 8.6 7.6 113 8.7 8.9 98 Cinnabar Park 9574 7.6 8.5 89 10.3 10.9 94 Crow Creek 8330 2.3 4.2 55 4.0 5.4 74 Deadman Hill 10220 8.0 7.0 114 8.2 7.6 108 Rawah 9020 5.5 4.1 134 7.9 7.1 111 Roach 9700 5.8 6.8 85 7.4 8.7 85 ----- ----- Basin Index (%) 99 96 S. PLATTE Black Mountain 8920 4.3 -M * 5.6 -M * Crow Creek 8330 2.3 4.2 55 4.0 5.4 74 Deadman Hill 10220 8.0 7.0 114 8.2 7.6 108 ----- ----- Basin Index (%) 92 94 LITTLE SNAKE RIVER Battle Mountain 7440 4.0 3.7 108 -M 6.8 * Divide Peak 8880 6.3 8.1 78 9.0 10.0 90 Elk River 8700 8.4 6.4 131 9.5 8.8 108 Little Snake River 8915 11.7 8.6 136 16.9 14.1 120 Old Battle 10000 11.7 12.2 96 13.5 15.8 85 Sage Creek Basin 7850 4.8 5.5 87 6.3 7.0 90 Sandstone RS 8150 5.1 4.2 121 5.6 8.2 68 Whiskey Park 8950 10.0 9.1 110 13.3 11.5 116 ----- ----- Basin Index (%) 107 98 UPPER GREEN RIVER Big Sandy Opening 9080 8.3 5.6 148 11.1 6.0 185 Blind Bull Sum 8650 13.3 8.8 151 14.9 8.9 167 East Rim Divide 7930 6.9 4.2 164 9.4 5.3 177 Elkhart Park G.S. 9400 5.6 5.5 102 11.2 6.2 181 Gros Ventre Summit 8750 6.2 5.9 105 10.3 5.9 175 Gunsight Pass 9820 6.8 5.8 117 11.1 6.2 179 Kendall R.S. 7740 7.4 4.6 161 11.7 6.2 189 Loomis Park 8240 9.4 6.2 152 14.7 7.8 188 New Fork Lake 8340 6.3 4.4 143 6.9 5.0 138 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 6.2 4.9 127 11.4 6.3 181 Spring Creek Divide 9000 12.1 9.4 129 17.5 10.4 168 Triple Peak 8500 14.0 7.9 177 18.8 10.5 179 ----- ----- Basin Index (%) 140 176 LOWER GREEN RIVER Blacks Fork Jct 8870 4.5 -M * 6.6 -M * Buck Pasture 9700 6.8 -M * 10.0 -M * EF Blacks Fork GS 9360 6.8 -M * 6.1 -M * Hams Fork 7840 4.9 4.4 111 8.6 5.0 172 Hewinta 9519 4.8 3.6 133 7.0 6.2 113 Hickerson Park 9145 4.2 2.7 156 4.4 4.8 92 Hole-in-Rock 9150 2.9 2.9 100 4.8 4.6 104 Indian Creek 9425 11.5 9.9 116 15.8 9.4 168 Kelley R.S. 8180 8.0 6.0 133 13.5 8.1 167 Spirit Lk 10235 6.4 -M * 8.6 -M * Steel Creek Park 10200 6.9 6.1 113 8.8 7.3 121 ----- ----- Basin Index (%) 121 139 UPPER BEAR RIVER Bear River RS 8777 4.5 -M * 6.6 -M * Bug Lake 7950 -M 6.1 * 10.8 8.6 126 Burts Miller Ranch 8000 2.2 -M * 3.3 -M * Chalk Creek #1 8993 10.4 9.5 109 12.9 11.1 116 Hayden Fork 9212 7.9 5.5 144 12.3 9.2 134 Kelley R.S. 8180 8.0 6.0 133 13.5 8.1 167 Lily Lake 9156 5.1 4.9 104 7.8 7.8 100 Monte Cristo 8960 10.3 9.7 106 13.3 11.3 118 Salt River Summit 7760 5.3 4.6 115 11.1 7.2 154 ----- ----- Basin Index (%) 117 129 ----------------------------------------------------------------------------- -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.