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 14 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 6.0 5.3 113 13.3 7.9 168 Black Bear 8170 9.5 12.8 74 19.4 13.9 140 Blind Bull Sum 8650 8.9 6.8 131 10.6 7.4 143 Cottonwood Creek 7670 6.7 6.2 108 13.6 8.8 155 East Rim Divide 7930 3.5 2.8 125 7.0 4.3 163 Grand Targhee 9260 19.1 12.4 154 18.6 11.6 160 Granite Creek 6770 5.2 4.1 127 11.6 7.2 161 Grassy Lake 7265 8.3 9.0 92 20.0 12.9 155 Gros Ventre Summit 8750 3.7 4.6 80 8.1 5.0 162 Gunsight Pass 9820 3.8 4.2 90 8.3 5.0 166 Lewis Lake Divide 7850 6.7 9.4 71 18.2 13.0 140 Phillips Bench 8200 6.2 7.8 79 15.6 9.8 159 Salt River Summit 7760 2.9 3.1 94 8.7 5.8 150 Snake River Station 6920 5.8 4.5 129 14.4 8.7 166 Spring Creek Divide 9000 8.2 7.1 115 13.7 8.5 161 Thumb Divide 7980 3.1 4.2 74 9.4 6.9 136 Togwotee Pass 9580 9.1 8.7 105 12.7 9.2 138 Two Ocean Plateau 9240 12.5 10.3 121 14.7 10.2 144 Willow Creek 8380 7.6 7.8 97 18.3 12.3 149 Younts Peak 8350 3.8 5.2 73 8.5 6.2 137 ----- ----- Basin Index (%) 103 152 MADISON-GALLATIN Black Bear 8170 9.5 12.8 74 19.4 13.9 140 Canyon 7870 3.3 3.7 89 9.2 6.0 153 Madison Plateau 7750 4.5 7.3 62 14.7 9.6 153 West Yellowstone 6700 2.1 2.9 72 9.6 5.3 181 Whiskey Creek 6800 2.1 4.4 48 9.8 7.7 127 ----- ----- Basin Index (%) 69 148 YELLOWSTONE Beartooth Lake 9360 7.6 7.5 101 5.6 7.0 80 Burnt Mtn 5880 2.4 1.5 160 6.0 5.9 102 Canyon 7870 3.3 3.7 89 9.2 6.0 153 Cole Creek 7850 4.0 5.4 74 4.0 5.6 71 Evening Star 9200 9.1 8.6 106 15.8 10.5 150 Fisher Creek 9100 9.2 11.0 84 14.7 11.8 125 Northeast Entrance 7350 2.5 2.5 100 7.8 5.0 156 Parker Peak 9400 8.4 7.5 112 11.6 6.9 168 Sylvan Lake 8420 6.0 6.7 90 16.0 9.0 178 Thumb Divide 7980 3.1 4.2 74 9.4 6.9 136 Two Ocean Plateau 9240 12.5 10.3 121 14.7 10.2 144 White Mill 8700 6.9 7.4 93 10.8 8.9 121 Wolverine 7650 3.8 3.2 119 7.6 5.0 152 ----- ----- Basin Index (%) 99 135 WIND RIVER Burroughs Creek 8750 4.6 -M * 6.9 -M * Castle Creek 8400 2.1 -M * 4.2 -M * Cold Springs 9630 2.4 2.6 92 4.7 4.3 109 Deer Park 9700 4.9 4.9 100 8.5 7.0 121 Hobbs Park 10100 4.9 5.7 86 6.4 5.3 121 Kirwin 9550 3.8 3.9 97 6.4 4.7 136 Little Warm 9370 2.1 3.6 58 6.7 5.1 131 Owl Creek 8975 1.4 2.1 67 2.9 2.5 116 South Pass 9040 4.6 5.1 90 5.5 6.9 80 St. Lawrence Alt 8620 1.1 2.6 42 4.4 3.8 116 Togwotee Pass 9580 9.1 8.7 105 12.7 9.2 138 Townsend Creek 8700 1.8 3.1 58 4.8 5.0 96 ----- ----- Basin Index (%) 85 117 BIGHORN BASIN Bald Mtn. 9380 8.2 6.6 124 6.8 6.3 108 Bear Trap Meadow 8200 .9 1.9 47 2.8 3.6 78 Bone Springs Div 9350 5.4 6.0 90 6.2 5.8 107 Grave Springs 8550 1.7 2.4 71 3.2 4.2 76 Kirwin 9550 3.8 3.9 97 6.4 4.7 136 Marquette 8760 3.0 -M * 5.0 -M * Middle Powder 7760 2.4 3.5 69 3.0 5.1 59 Owl Creek 8975 1.4 2.1 67 2.9 2.5 116 Powder River Pass 9480 1.1 3.6 31 3.8 4.8 79 Shell Creek 9580 6.3 5.6 112 5.5 5.4 102 Timber Creek 7950 2.0 2.0 100 3.4 3.5 97 ----- ----- Basin Index (%) 88 96 SHOSHONE RIVER Blackwater 9780 11.3 8.2 138 14.6 8.1 180 Evening Star 9200 9.1 8.6 106 15.8 10.5 150 Marquette 8760 3.0 -M * 5.0 -M * Sylvan Road 7120 3.5 3.9 90 12.8 7.3 175 Younts Peak 8350 3.8 5.2 73 8.5 6.2 137 ----- ----- Basin Index (%) 107 161 POWDER RIVER Bear Trap Meadow 8200 .9 1.9 47 2.8 3.6 78 Cloud Peak Reservoir 9860 2.6 4.7 55 4.9 5.3 92 Grave Springs 8550 1.7 2.4 71 3.2 4.2 76 Hansen Sawmill 8360 1.6 2.1 76 3.2 3.5 91 Middle Powder 7760 2.4 3.5 69 3.0 5.1 59 Powder River Pass 9480 1.1 3.6 31 3.8 4.8 79 Soldier Park 8720 1.5 -M * 3.9 -M * ----- ----- Basin Index (%) 57 79 TONGUE RIVER Big Goose 7990 2.3 3.0 77 3.6 4.5 80 Bone Springs Div 9350 5.4 6.0 90 6.2 5.8 107 Burgess Junction 7880 2.6 3.7 70 4.3 4.8 90 Dome Lake 8880 2.2 4.3 51 5.0 5.6 89 Little Goose 8870 2.6 -M * 4.5 -M * Sucker Creek 8880 3.4 4.0 85 4.2 5.5 76 Tie Creek 6870 2.0 1.1 182 4.7 4.6 102 ----- ----- Basin Index (%) 81 91 BELLE FOURCHE Cole Canyon 5910 1.7 1.1 155 2.7 4.0 68 ----- ----- Basin Index (%) 155 68 CHEYENNE RIVER BASIN Blind Park 6890 2.4 2.0 120 3.7 4.9 76 North Rapid Creek 6130 2.1 2.3 91 2.3 4.1 56 ----- ----- Basin Index (%) 105 67 UPPER N. PLATTE Arapaho Ridge 10960 7.1 7.1 100 9.1 8.8 103 Blackhall Mtn 9820 7.8 -M * 10.1 -M * Columbine 9160 6.9 6.1 113 9.3 9.0 103 Divide Peak 8880 4.2 5.9 71 6.8 8.2 83 Joe Wright 10120 4.8 7.5 64 9.4 9.8 96 Laprele Creek 8375 2.0 2.9 69 2.4 4.8 50 Med Bow 10500 10.8 -M * 11.7 -M * North French Creek 10130 6.1 8.9 69 8.2 9.4 87 Never Summer 10280 5.8 6.4 91 6.6 -M * Old Battle 10000 6.7 9.6 70 7.9 12.8 62 Rawah 9020 3.6 3.3 109 6.0 5.9 102 Sage Creek Basin 7850 3.0 3.8 79 4.5 5.6 80 Sand Lake 10050 7.5 8.9 84 7.5 9.0 83 South Brush Creek 8440 2.2 3.4 65 3.8 5.8 66 Tower 10500 9.7 14.8 66 12.2 14.6 84 Webber Springs 9250 4.4 7.3 60 7.9 9.7 81 Willow Creek Pass 9540 4.4 4.2 105 5.6 5.4 104 Zirkel 9340 7.0 6.8 103 10.9 10.7 102 ----- ----- Basin Index (%) 80 86 SWEETWATER Deer Park 9700 4.9 4.9 100 8.5 7.0 121 Larsen Creek 9000 3.4 3.5 97 7.8 -M * South Pass 9040 4.6 5.1 90 5.5 6.9 80 ----- ----- Basin Index (%) 96 101 LOWER N. PLATTE Casper Mtn. 7900 2.5 4.3 58 3.4 6.2 55 Laprele Creek 8375 2.0 2.9 69 2.4 4.8 50 Reno Hill 8400 -M 4.7 * -M 5.9 * Windy Peak 7900 1.8 2.3 78 2.6 4.3 60 ----- ----- Basin Index (%) 66 55 LARAMIE RIVER Brooklyn Lake 10240 4.6 6.0 77 5.3 7.2 74 Cinnabar Park 9574 4.3 7.1 61 7.0 9.0 78 Crow Creek 8330 1.8 3.5 51 3.2 4.4 73 Deadman Hill 10220 5.7 5.4 106 6.3 6.3 100 Rawah 9020 3.6 3.3 109 6.0 5.9 102 Roach 9700 -M 4.9 * -M 7.0 * ----- ----- Basin Index (%) 79 85 S. PLATTE Black Mountain 8920 3.0 -M * 4.6 -M * Crow Creek 8330 1.8 3.5 51 3.2 4.4 73 Deadman Hill 10220 5.7 5.4 106 6.3 6.3 100 ----- ----- Basin Index (%) 84 89 LITTLE SNAKE RIVER Battle Mountain 7440 3.0 2.5 120 5.6 5.6 100 Divide Peak 8880 4.2 5.9 71 6.8 8.2 83 Elk River 8700 4.6 4.5 102 6.4 7.1 90 Little Snake River 8915 6.1 5.3 115 10.8 11.5 94 Old Battle 10000 6.7 9.6 70 7.9 12.8 62 Sage Creek Basin 7850 3.0 3.8 79 4.5 5.6 80 Sandstone RS 8150 3.2 3.3 97 3.5 6.8 51 Whiskey Park 8950 6.2 7.0 89 9.6 9.4 102 ----- ----- Basin Index (%) 88 82 UPPER GREEN RIVER Big Sandy Opening 9080 5.2 4.5 116 8.1 5.0 162 Blind Bull Sum 8650 8.9 6.8 131 10.6 7.4 143 East Rim Divide 7930 3.5 2.8 125 7.0 4.3 163 Elkhart Park G.S. 9400 3.5 4.1 85 8.7 5.1 171 Gros Ventre Summit 8750 3.7 4.6 80 8.1 5.0 162 Gunsight Pass 9820 3.8 4.2 90 8.3 5.0 166 Kendall R.S. 7740 4.9 3.4 144 9.1 5.1 178 Loomis Park 8240 5.2 4.4 118 10.4 6.2 168 New Fork Lake 8340 4.2 3.2 131 5.1 4.1 124 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 3.6 3.5 103 9.0 5.0 180 Spring Creek Divide 9000 8.2 7.1 115 13.7 8.5 161 Triple Peak 8500 9.6 6.1 157 14.5 8.7 167 ----- ----- Basin Index (%) 118 162 LOWER GREEN RIVER Blacks Fork Jct 8870 3.3 -M * 4.8 -M * Buck Pasture 9700 4.8 -M * 7.2 -M * EF Blacks Fork GS 9360 3.2 -M * 5.2 -M * Hams Fork 7840 3.1 3.2 97 7.0 4.1 171 Hewinta 9519 3.0 2.6 115 5.3 5.5 96 Hickerson Park 9145 3.0 1.9 158 3.6 4.3 84 Hole-in-Rock 9150 1.9 2.2 86 3.9 4.0 98 Indian Creek 9425 7.6 7.4 103 11.2 7.6 147 Kelley R.S. 8180 5.1 4.2 121 10.6 6.5 163 Spirit Lk 10235 3.7 -M * 6.1 -M * Steel Creek Park 10200 5.0 5.1 98 6.8 6.2 110 ----- ----- Basin Index (%) 108 127 UPPER BEAR RIVER Bear River RS 8777 3.0 -M * 5.0 -M * Bug Lake 7950 6.4 4.8 133 8.4 7.2 117 Burts Miller Ranch 8000 1.7 -M * 2.9 -M * Chalk Creek #1 8993 7.1 7.8 91 9.5 9.5 100 Hayden Fork 9212 5.2 3.9 133 8.8 7.7 114 Kelley R.S. 8180 5.1 4.2 121 10.6 6.5 163 Lily Lake 9156 3.4 4.0 85 5.7 6.6 86 Monte Cristo 8960 6.3 7.4 85 10.2 9.2 111 Salt River Summit 7760 2.9 3.1 94 8.7 5.8 150 ----- ----- Basin Index (%) 103 118 ----------------------------------------------------------------------------- -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.