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 SUNDAY: DECEMBER 25 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 9.6 6.5 148 17.2 9.0 191 Black Bear 8170 14.6 15.5 94 24.2 16.0 151 Blind Bull Sum 8650 13.1 8.2 160 14.7 8.4 175 Cottonwood Creek 7670 9.1 7.6 120 16.2 10.1 160 East Rim Divide 7930 5.7 3.8 150 8.9 4.9 182 Grand Targhee 9260 22.0 15.9 138 21.7 13.7 158 Granite Creek 6770 8.9 5.3 168 15.2 8.3 183 Grassy Lake 7265 13.7 10.9 126 25.7 15.1 170 Gros Ventre Summit 8750 5.9 5.3 111 10.3 5.5 187 Gunsight Pass 9820 6.7 5.0 134 11.0 5.7 193 Lewis Lake Divide 7850 11.6 11.4 102 23.2 15.0 155 Phillips Bench 8200 10.5 9.5 111 19.6 11.4 172 Salt River Summit 7760 5.0 4.2 119 11.0 6.7 164 Snake River Station 6920 9.1 5.5 165 17.8 9.9 180 Spring Creek Divide 9000 11.4 8.5 134 16.9 9.7 174 Thumb Divide 7980 6.0 5.5 109 12.0 7.8 154 Togwotee Pass 9580 12.8 10.1 127 16.5 10.5 157 Two Ocean Plateau 9240 17.1 11.3 151 18.6 11.5 162 Willow Creek 8380 10.6 9.6 110 21.5 14.1 152 Younts Peak 8350 7.2 6.2 116 12.1 6.9 175 ----- ----- Basin Index (%) 127 167 MADISON-GALLATIN Black Bear 8170 14.6 15.5 94 24.2 16.0 151 Canyon 7870 6.1 4.8 127 12.3 7.1 173 Madison Plateau 7750 8.1 9.3 87 18.1 10.9 166 West Yellowstone 6700 4.9 4.0 122 12.2 6.2 197 Whiskey Creek 6800 5.3 5.8 91 13.1 8.8 149 ----- ----- Basin Index (%) 99 163 YELLOWSTONE Beartooth Lake 9360 11.3 9.0 126 5.9 8.2 72 Burnt Mtn 5880 3.0 1.9 158 6.8 6.4 106 Canyon 7870 6.1 4.8 127 12.3 7.1 173 Cole Creek 7850 4.5 5.9 76 4.6 6.2 74 Evening Star 9200 13.5 10.1 134 19.5 12.0 162 Fisher Creek 9100 12.8 13.6 94 18.1 13.6 133 Northeast Entrance 7350 4.2 3.2 131 9.6 5.7 168 Parker Peak 9400 11.8 8.8 134 14.8 7.8 190 Sylvan Lake 8420 9.0 8.4 107 19.2 10.3 186 Thumb Divide 7980 6.0 5.5 109 12.0 7.8 154 Two Ocean Plateau 9240 17.1 11.3 151 18.6 11.5 162 White Mill 8700 10.6 8.9 119 14.3 10.3 139 Wolverine 7650 6.3 4.2 150 10.1 5.7 177 ----- ----- Basin Index (%) 122 147 WIND RIVER Burroughs Creek 8750 7.6 -M * 10.3 -M * Castle Creek 8400 4.3 -M * 6.3 -M * Cold Springs 9630 3.8 3.0 127 6.2 4.6 135 Deer Park 9700 8.8 5.7 154 12.7 7.8 163 Hobbs Park 10100 7.6 6.1 125 8.3 5.8 143 Kirwin 9550 6.3 4.2 150 9.3 5.2 179 Little Warm 9370 3.7 4.1 90 8.5 5.7 149 Owl Creek 8975 2.3 2.3 100 3.7 2.7 137 South Pass 9040 8.3 5.8 143 8.7 7.6 114 St. Lawrence Alt 8620 1.7 2.8 61 5.3 4.1 129 Togwotee Pass 9580 12.8 10.1 127 16.5 10.5 157 Townsend Creek 8700 3.6 3.6 100 6.4 5.5 116 ----- ----- Basin Index (%) 123 144 BIGHORN BASIN Bald Mtn. 9380 10.1 7.5 135 8.8 7.3 121 Bear Trap Meadow 8200 1.5 2.4 62 3.5 4.0 88 Bone Springs Div 9350 7.0 6.9 101 7.8 6.6 118 Grave Springs 8550 2.4 3.0 80 3.9 4.7 83 Kirwin 9550 6.3 4.2 150 9.3 5.2 179 Marquette 8760 3.4 -M * 6.4 -M * Middle Powder 7760 2.9 4.6 63 3.9 5.8 67 Owl Creek 8975 2.3 2.3 100 3.7 2.7 137 Powder River Pass 9480 1.8 4.2 43 4.9 5.5 89 Shell Creek 9580 7.8 6.8 115 6.4 6.1 105 Timber Creek 7950 2.6 2.0 130 4.0 3.8 105 ----- ----- Basin Index (%) 102 109 SHOSHONE RIVER Blackwater 9780 14.8 9.7 153 18.0 9.2 196 Evening Star 9200 13.5 10.1 134 19.5 12.0 162 Marquette 8760 3.4 -M * 6.4 -M * Sylvan Road 7120 6.5 4.8 135 16.2 8.3 195 Younts Peak 8350 7.2 6.2 116 12.1 6.9 175 ----- ----- Basin Index (%) 136 181 POWDER RIVER Bear Trap Meadow 8200 1.5 2.4 62 3.5 4.0 88 Cloud Peak Reservoir 9860 4.0 5.6 71 6.1 5.9 103 Grave Springs 8550 2.4 3.0 80 3.9 4.7 83 Hansen Sawmill 8360 2.7 2.7 100 4.3 3.8 113 Middle Powder 7760 2.9 4.6 63 3.9 5.8 67 Powder River Pass 9480 1.8 4.2 43 4.9 5.5 89 Soldier Park 8720 3.2 -M * 4.9 -M * ----- ----- Basin Index (%) 68 90 TONGUE RIVER Big Goose 7990 3.4 3.4 100 4.5 5.1 88 Bone Springs Div 9350 7.0 6.9 101 7.8 6.6 118 Burgess Junction 7880 3.6 4.3 84 5.3 5.6 95 Dome Lake 8880 3.9 4.9 80 6.1 6.4 95 Little Goose 8870 3.8 -M * 5.8 -M * Sucker Creek 8880 4.4 4.7 94 5.4 6.4 84 Tie Creek 6870 2.7 1.6 169 5.7 5.3 108 ----- ----- Basin Index (%) 97 98 BELLE FOURCHE Cole Canyon 5910 2.2 1.5 147 3.5 4.4 80 ----- ----- Basin Index (%) 147 80 CHEYENNE RIVER BASIN Blind Park 6890 3.1 2.7 115 4.3 5.6 77 North Rapid Creek 6130 2.8 2.8 100 3.1 4.7 66 ----- ----- Basin Index (%) 107 72 UPPER N. PLATTE Arapaho Ridge 10960 10.0 8.7 115 11.8 10.0 118 Blackhall Mtn 9820 11.3 -M * 13.4 -M * Columbine 9160 9.3 8.0 116 11.9 10.7 111 Divide Peak 8880 6.0 7.5 80 8.4 9.5 88 Joe Wright 10120 7.1 8.9 80 12.0 11.4 105 Laprele Creek 8375 3.9 3.6 108 4.2 5.6 75 Med Bow 10500 14.1 -M * 14.7 -M * North French Creek 10130 8.9 10.6 84 10.9 11.1 98 Never Summer 10280 8.4 8.0 105 8.6 -M * Old Battle 10000 10.7 11.7 91 12.5 14.9 84 Rawah 9020 5.1 3.9 131 7.9 6.8 116 Sage Creek Basin 7850 4.3 5.1 84 5.6 6.6 85 Sand Lake 10050 9.8 10.5 93 9.8 10.4 94 South Brush Creek 8440 3.4 4.3 79 5.2 6.7 78 Tower 10500 13.5 18.2 74 16.9 16.9 100 Webber Springs 9250 8.2 8.8 93 11.7 11.4 103 Willow Creek Pass 9540 6.8 5.1 133 8.1 6.1 133 Zirkel 9340 10.8 8.6 126 14.6 12.4 118 ----- ----- Basin Index (%) 96 101 SWEETWATER Deer Park 9700 8.8 5.7 154 12.7 7.8 163 Larsen Creek 9000 6.6 4.4 150 10.7 -M * South Pass 9040 8.3 5.8 143 8.7 7.6 114 ----- ----- Basin Index (%) 149 139 LOWER N. PLATTE Casper Mtn. 7900 4.1 5.4 76 4.9 7.0 70 Laprele Creek 8375 3.9 3.6 108 4.2 5.6 75 Reno Hill 8400 -M 5.4 * -M 6.6 * Windy Peak 7900 3.3 2.9 114 4.2 4.8 88 ----- ----- Basin Index (%) 95 76 LARAMIE RIVER Brooklyn Lake 10240 7.2 7.3 99 7.6 8.5 89 Cinnabar Park 9574 6.6 7.8 85 9.3 10.3 90 Crow Creek 8330 2.1 3.9 54 3.8 5.1 75 Deadman Hill 10220 7.2 6.8 106 7.7 7.3 105 Rawah 9020 5.1 3.9 131 7.9 6.8 116 Roach 9700 5.1 6.4 80 6.8 8.3 82 ----- ----- Basin Index (%) 92 93 S. PLATTE Black Mountain 8920 3.6 -M * 5.3 -M * Crow Creek 8330 2.1 3.9 54 3.8 5.1 75 Deadman Hill 10220 7.2 6.8 106 7.7 7.3 105 ----- ----- Basin Index (%) 87 93 LITTLE SNAKE RIVER Battle Mountain 7440 3.5 3.4 103 6.4 6.5 98 Divide Peak 8880 6.0 7.5 80 8.4 9.5 88 Elk River 8700 7.5 5.9 127 8.6 8.3 104 Little Snake River 8915 10.4 7.7 135 15.4 13.5 114 Old Battle 10000 10.7 11.7 91 12.5 14.9 84 Sage Creek Basin 7850 4.3 5.1 84 5.6 6.6 85 Sandstone RS 8150 4.6 4.1 112 5.4 7.9 68 Whiskey Park 8950 8.8 8.6 102 11.8 11.0 107 ----- ----- Basin Index (%) 103 95 UPPER GREEN RIVER Big Sandy Opening 9080 8.1 5.1 159 10.8 5.7 189 Blind Bull Sum 8650 13.1 8.2 160 14.7 8.4 175 East Rim Divide 7930 5.7 3.8 150 8.9 4.9 182 Elkhart Park G.S. 9400 5.3 4.9 108 10.8 5.8 186 Gros Ventre Summit 8750 5.9 5.3 111 10.3 5.5 187 Gunsight Pass 9820 6.7 5.0 134 11.0 5.7 193 Kendall R.S. 7740 7.2 4.3 167 11.5 5.8 198 Loomis Park 8240 8.8 5.6 157 14.1 7.2 196 New Fork Lake 8340 5.9 4.0 148 6.6 4.6 143 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 5.8 4.6 126 11.0 5.9 186 Spring Creek Divide 9000 11.4 8.5 134 16.9 9.7 174 Triple Peak 8500 13.3 7.6 175 18.2 9.9 184 ----- ----- Basin Index (%) 145 183 LOWER GREEN RIVER Blacks Fork Jct 8870 4.4 -M * 6.0 -M * Buck Pasture 9700 6.6 -M * 9.3 -M * EF Blacks Fork GS 9360 6.3 -M * 6.0 -M * Hams Fork 7840 4.7 4.0 118 8.4 4.7 179 Hewinta 9519 4.4 3.3 133 6.6 6.1 108 Hickerson Park 9145 4.2 2.4 175 4.7 4.7 100 Hole-in-Rock 9150 2.9 2.8 104 4.9 4.4 111 Indian Creek 9425 10.8 9.5 114 15.0 8.8 170 Kelley R.S. 8180 7.5 5.6 134 13.0 7.5 173 Spirit Lk 10235 6.4 -M * 8.8 -M * Steel Creek Park 10200 6.5 5.8 112 8.2 7.0 117 ----- ----- Basin Index (%) 123 141 UPPER BEAR RIVER Bear River RS 8777 4.3 -M * 6.3 -M * Bug Lake 7950 8.3 5.8 143 10.8 8.2 132 Burts Miller Ranch 8000 2.4 -M * 3.5 -M * Chalk Creek #1 8993 10.0 9.4 106 12.3 10.7 115 Hayden Fork 9212 7.4 4.8 154 11.5 8.8 131 Kelley R.S. 8180 7.5 5.6 134 13.0 7.5 173 Lily Lake 9156 4.8 4.7 102 7.2 7.5 96 Monte Cristo 8960 9.7 9.1 107 13.1 10.7 122 Salt River Summit 7760 5.0 4.2 119 11.0 6.7 164 ----- ----- Basin Index (%) 121 131 ----------------------------------------------------------------------------- -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.