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 11 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 5.6 4.9 114 12.9 7.5 172 Black Bear 8170 9.3 12.1 77 19.0 13.1 145 Blind Bull Sum 8650 8.6 6.4 134 10.5 7.0 150 Cottonwood Creek 7670 6.4 5.8 110 13.5 8.2 165 East Rim Divide 7930 3.2 2.5 128 6.6 4.1 161 Grand Targhee 9260 18.5 11.0 168 18.1 10.8 168 Granite Creek 6770 4.7 3.8 124 11.0 6.7 164 Grassy Lake 7265 8.1 8.4 96 20.0 12.1 165 Gros Ventre Summit 8750 3.5 4.5 78 7.9 4.8 165 Gunsight Pass 9820 3.6 4.0 90 8.0 4.8 167 Lewis Lake Divide 7850 6.3 9.0 70 17.7 12.3 144 Phillips Bench 8200 5.9 7.4 80 15.1 9.3 162 Salt River Summit 7760 2.9 2.9 100 8.6 5.4 159 Snake River Station 6920 5.6 4.2 133 14.2 8.1 175 Spring Creek Divide 9000 7.8 6.4 122 13.3 8.0 166 Thumb Divide 7980 3.1 3.9 79 9.3 6.5 143 Togwotee Pass 9580 7.6 8.3 92 11.3 8.8 128 Two Ocean Plateau 9240 12.2 10.1 121 14.4 9.7 148 Willow Creek 8380 7.2 7.3 99 17.8 11.6 153 Younts Peak 8350 3.5 5.0 70 8.2 5.9 139 ----- ----- Basin Index (%) 104 156 MADISON-GALLATIN Black Bear 8170 9.3 12.1 77 19.0 13.1 145 Canyon 7870 3.1 3.4 91 9.0 5.8 155 Madison Plateau 7750 4.5 7.0 64 14.7 9.0 163 West Yellowstone 6700 -M 2.7 * -M 5.0 * Whiskey Creek 6800 2.2 4.2 52 9.8 7.3 134 ----- ----- Basin Index (%) 72 149 YELLOWSTONE Beartooth Lake 9360 7.2 7.3 99 5.7 6.7 85 Burnt Mtn 5880 2.3 1.5 153 6.0 5.8 103 Canyon 7870 3.1 3.4 91 9.0 5.8 155 Cole Creek 7850 4.0 5.2 77 4.0 5.5 73 Evening Star 9200 8.5 8.3 102 15.1 10.0 151 Fisher Creek 9100 8.8 10.3 85 14.2 11.2 127 Northeast Entrance 7350 2.3 2.3 100 7.7 4.7 164 Parker Peak 9400 8.6 7.1 121 11.5 6.6 174 Sylvan Lake 8420 5.9 6.4 92 15.9 8.6 185 Thumb Divide 7980 3.1 3.9 79 9.3 6.5 143 Two Ocean Plateau 9240 12.2 10.1 121 14.4 9.7 148 White Mill 8700 6.5 7.0 93 10.5 8.6 122 Wolverine 7650 3.6 3.0 120 7.6 4.8 158 ----- ----- Basin Index (%) 100 139 WIND RIVER Burroughs Creek 8750 4.1 -M * 6.6 -M * Castle Creek 8400 2.1 -M * 4.2 -M * Cold Springs 9630 2.3 2.6 88 4.8 4.1 117 Deer Park 9700 -M 4.8 * -M 6.7 * Hobbs Park 10100 4.8 5.4 89 6.4 5.1 125 Kirwin 9550 3.5 3.8 92 6.1 4.6 133 Little Warm 9370 1.9 3.5 54 6.4 5.0 128 Owl Creek 8975 1.4 2.0 70 2.9 2.4 121 South Pass 9040 4.6 4.8 96 5.5 6.6 83 St. Lawrence Alt 8620 1.3 2.4 54 4.4 3.7 119 Togwotee Pass 9580 7.6 8.3 92 11.3 8.8 128 Townsend Creek 8700 2.0 3.0 67 5.3 4.9 108 ----- ----- Basin Index (%) 82 117 BIGHORN BASIN Bald Mtn. 9380 7.9 6.4 123 6.9 5.9 117 Bear Trap Meadow 8200 1.0 1.8 56 3.1 3.6 86 Bone Springs Div 9350 4.9 5.8 84 6.1 5.6 109 Grave Springs 8550 1.8 2.3 78 3.5 4.1 85 Kirwin 9550 3.5 3.8 92 6.1 4.6 133 Marquette 8760 3.1 -M * 5.1 -M * Middle Powder 7760 2.4 3.4 71 3.3 4.9 67 Owl Creek 8975 1.4 2.0 70 2.9 2.4 121 Powder River Pass 9480 -M 3.5 * 4.3 4.6 93 Shell Creek 9580 6.2 5.3 117 5.7 5.2 110 Timber Creek 7950 2.1 1.9 111 3.4 3.4 100 ----- ----- Basin Index (%) 95 102 SHOSHONE RIVER Blackwater 9780 10.6 7.8 136 13.9 7.8 178 Evening Star 9200 8.5 8.3 102 15.1 10.0 151 Marquette 8760 3.1 -M * 5.1 -M * Sylvan Road 7120 3.5 3.6 97 12.5 7.0 179 Younts Peak 8350 3.5 5.0 70 8.2 5.9 139 ----- ----- Basin Index (%) 106 162 POWDER RIVER Bear Trap Meadow 8200 1.0 1.8 56 3.1 3.6 86 Cloud Peak Reservoir 9860 2.6 4.4 59 5.1 5.2 98 Grave Springs 8550 1.8 2.3 78 3.5 4.1 85 Hansen Sawmill 8360 1.7 2.0 85 3.2 3.4 94 Middle Powder 7760 2.4 3.4 71 3.3 4.9 67 Powder River Pass 9480 -M 3.5 * 4.3 4.6 93 Soldier Park 8720 1.6 -M * 3.9 -M * ----- ----- Basin Index (%) 68 87 TONGUE RIVER Big Goose 7990 2.4 2.9 83 3.7 4.4 84 Bone Springs Div 9350 4.9 5.8 84 6.1 5.6 109 Burgess Junction 7880 2.5 3.5 71 4.5 4.7 96 Dome Lake 8880 2.2 4.2 52 5.1 5.4 94 Little Goose 8870 2.6 -M * 4.7 -M * Sucker Creek 8880 3.4 3.8 89 4.4 5.3 83 Tie Creek 6870 2.0 1.1 182 4.8 4.6 104 ----- ----- Basin Index (%) 82 95 BELLE FOURCHE Cole Canyon 5910 1.7 1.1 155 2.9 3.9 74 ----- ----- Basin Index (%) 155 74 CHEYENNE RIVER BASIN Blind Park 6890 2.6 1.9 137 3.8 4.8 79 North Rapid Creek 6130 2.3 2.0 115 2.6 4.0 65 ----- ----- Basin Index (%) 126 73 UPPER N. PLATTE Arapaho Ridge 10960 6.4 6.8 94 8.4 8.4 100 Blackhall Mtn 9820 7.5 -M * 9.9 -M * Columbine 9160 5.9 5.7 104 8.4 8.5 99 Divide Peak 8880 4.2 5.7 74 6.5 7.8 83 Joe Wright 10120 4.8 7.0 69 8.9 9.3 96 Laprele Creek 8375 2.2 2.7 81 2.7 4.7 57 Med Bow 10500 10.4 -M * 11.3 -M * North French Creek 10130 6.0 8.4 71 8.0 8.9 90 Never Summer 10280 5.0 6.0 83 6.2 -M * Old Battle 10000 6.5 9.1 71 7.9 12.0 66 Rawah 9020 3.3 3.1 106 5.8 5.7 102 Sage Creek Basin 7850 3.0 3.4 88 4.4 5.3 83 Sand Lake 10050 7.1 8.5 84 7.1 8.5 84 South Brush Creek 8440 2.3 3.2 72 3.9 5.4 72 Tower 10500 9.0 13.7 66 11.4 13.8 83 Webber Springs 9250 4.4 6.5 68 8.0 9.1 88 Willow Creek Pass 9540 3.8 4.0 95 5.0 5.1 98 Zirkel 9340 6.6 6.1 108 10.4 10.1 103 ----- ----- Basin Index (%) 81 87 SWEETWATER Deer Park 9700 -M 4.8 * -M 6.7 * Larsen Creek 9000 3.3 3.3 100 7.7 -M * South Pass 9040 4.6 4.8 96 5.5 6.6 83 ----- ----- Basin Index (%) 98 83* LOWER N. PLATTE Casper Mtn. 7900 2.9 4.1 71 3.7 6.1 61 Laprele Creek 8375 2.2 2.7 81 2.7 4.7 57 Reno Hill 8400 3.3 4.4 75 3.7 5.7 65 Windy Peak 7900 1.6 2.2 73 2.3 4.1 56 ----- ----- Basin Index (%) 75 60 LARAMIE RIVER Brooklyn Lake 10240 4.3 5.5 78 4.9 6.9 71 Cinnabar Park 9574 4.1 6.6 62 6.8 8.4 81 Crow Creek 8330 1.7 3.4 50 3.1 4.2 74 Deadman Hill 10220 5.2 5.2 100 5.8 6.0 97 Rawah 9020 3.3 3.1 106 5.8 5.7 102 Roach 9700 -M 4.7 * -M 6.7 * ----- ----- Basin Index (%) 78 85 S. PLATTE Black Mountain 8920 2.8 -M * 4.2 -M * Crow Creek 8330 1.7 3.4 50 3.1 4.2 74 Deadman Hill 10220 5.2 5.2 100 5.8 6.0 97 ----- ----- Basin Index (%) 80 87 LITTLE SNAKE RIVER Battle Mountain 7440 2.7 2.3 117 5.6 5.3 106 Divide Peak 8880 4.2 5.7 74 6.5 7.8 83 Elk River 8700 4.4 4.2 105 6.1 6.7 91 Little Snake River 8915 6.0 4.8 125 10.6 10.9 97 Old Battle 10000 6.5 9.1 71 7.9 12.0 66 Sage Creek Basin 7850 3.0 3.4 88 4.4 5.3 83 Sandstone RS 8150 3.1 3.0 103 3.5 6.3 56 Whiskey Park 8950 6.0 6.7 90 9.2 8.8 105 ----- ----- Basin Index (%) 92 85 UPPER GREEN RIVER Big Sandy Opening 9080 5.2 4.2 124 8.0 4.8 167 Blind Bull Sum 8650 8.6 6.4 134 10.5 7.0 150 East Rim Divide 7930 3.2 2.5 128 6.6 4.1 161 Elkhart Park G.S. 9400 3.3 3.9 85 8.5 4.9 173 Gros Ventre Summit 8750 3.5 4.5 78 7.9 4.8 165 Gunsight Pass 9820 3.6 4.0 90 8.0 4.8 167 Kendall R.S. 7740 4.3 3.3 130 8.5 4.8 177 Loomis Park 8240 4.4 4.0 110 9.6 5.9 163 New Fork Lake 8340 3.8 2.9 131 4.7 3.9 121 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 3.4 3.3 103 8.6 4.8 179 Spring Creek Divide 9000 7.8 6.4 122 13.3 8.0 166 Triple Peak 8500 8.9 5.8 153 13.8 8.3 166 ----- ----- Basin Index (%) 117 163 LOWER GREEN RIVER Blacks Fork Jct 8870 3.3 -M * 4.7 -M * Buck Pasture 9700 4.6 -M * 6.8 -M * EF Blacks Fork GS 9360 2.8 -M * 5.1 -M * Hams Fork 7840 3.2 3.0 107 7.0 4.0 175 Hewinta 9519 2.9 2.3 126 5.2 5.2 100 Hickerson Park 9145 3.0 1.8 167 3.6 4.2 86 Hole-in-Rock 9150 1.7 2.0 85 3.8 3.9 97 Indian Creek 9425 7.5 6.9 109 11.2 7.2 156 Kelley R.S. 8180 5.0 3.9 128 10.5 6.1 172 Spirit Lk 10235 3.8 -M * 6.1 -M * Steel Creek Park 10200 4.8 5.0 96 6.6 6.0 110 ----- ----- Basin Index (%) 113 131 UPPER BEAR RIVER Bear River RS 8777 3.0 -M * 4.8 -M * Bug Lake 7950 6.1 4.5 136 8.3 6.8 122 Burts Miller Ranch 8000 1.4 -M * 2.7 -M * Chalk Creek #1 8993 6.9 7.3 95 8.9 9.0 99 Hayden Fork 9212 5.1 3.6 142 8.6 7.3 118 Kelley R.S. 8180 5.0 3.9 128 10.5 6.1 172 Lily Lake 9156 3.1 3.7 84 5.5 6.3 87 Monte Cristo 8960 6.2 7.0 89 9.7 8.7 111 Salt River Summit 7760 2.9 2.9 100 8.6 5.4 159 ----- ----- Basin Index (%) 107 121 ----------------------------------------------------------------------------- -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.