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 MONDAY: DECEMBER 12 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 5.8 5.1 114 13.2 7.6 174 Black Bear 8170 9.4 12.3 76 19.3 13.3 145 Blind Bull Sum 8650 8.7 6.6 132 10.4 7.1 146 Cottonwood Creek 7670 6.5 5.9 110 13.5 8.4 161 East Rim Divide 7930 3.3 2.6 127 6.7 4.1 163 Grand Targhee 9260 19.0 11.4 167 18.5 10.9 170 Granite Creek 6770 4.8 3.9 123 11.2 6.8 165 Grassy Lake 7265 8.2 8.6 95 19.9 12.3 162 Gros Ventre Summit 8750 3.6 4.5 80 8.0 4.8 167 Gunsight Pass 9820 3.7 4.1 90 8.2 4.8 171 Lewis Lake Divide 7850 6.5 9.2 71 18.0 12.5 144 Phillips Bench 8200 5.9 7.5 79 15.3 9.4 163 Salt River Summit 7760 2.9 3.0 97 8.5 5.5 155 Snake River Station 6920 5.7 4.3 133 14.3 8.2 174 Spring Creek Divide 9000 8.0 6.6 121 13.5 8.1 167 Thumb Divide 7980 3.1 4.0 78 9.4 6.6 142 Togwotee Pass 9580 8.4 8.4 100 12.1 8.9 136 Two Ocean Plateau 9240 12.2 10.2 120 14.5 9.8 148 Willow Creek 8380 7.4 7.5 99 18.0 11.7 154 Younts Peak 8350 3.5 5.1 69 8.3 6.0 138 ----- ----- Basin Index (%) 104 156 MADISON-GALLATIN Black Bear 8170 9.4 12.3 76 19.3 13.3 145 Canyon 7870 3.1 3.5 89 9.2 5.8 159 Madison Plateau 7750 4.5 7.1 63 14.7 9.1 162 West Yellowstone 6700 -M 2.8 * -M 5.0 * Whiskey Creek 6800 2.3 4.2 55 9.9 7.4 134 ----- ----- Basin Index (%) 71 149 YELLOWSTONE Beartooth Lake 9360 7.3 7.4 99 5.7 6.8 84 Burnt Mtn 5880 2.4 1.5 160 6.0 5.8 103 Canyon 7870 3.1 3.5 89 9.2 5.8 159 Cole Creek 7850 4.0 5.3 75 4.0 5.5 73 Evening Star 9200 8.8 8.4 105 15.2 10.1 150 Fisher Creek 9100 8.9 10.5 85 14.6 11.3 129 Northeast Entrance 7350 2.3 2.4 96 7.7 4.8 160 Parker Peak 9400 8.6 7.2 119 11.6 6.7 173 Sylvan Lake 8420 5.9 6.5 91 15.9 8.7 183 Thumb Divide 7980 3.1 4.0 78 9.4 6.6 142 Two Ocean Plateau 9240 12.2 10.2 120 14.5 9.8 148 White Mill 8700 6.7 7.1 94 10.6 8.6 123 Wolverine 7650 3.7 3.1 119 7.7 4.9 157 ----- ----- Basin Index (%) 100 138 WIND RIVER Burroughs Creek 8750 4.3 -M * 6.7 -M * Castle Creek 8400 2.0 -M * 4.3 -M * Cold Springs 9630 2.2 2.6 85 4.7 4.2 112 Deer Park 9700 4.7 4.8 98 8.3 6.7 124 Hobbs Park 10100 4.7 5.5 85 6.3 5.2 121 Kirwin 9550 3.6 3.9 92 6.2 4.6 135 Little Warm 9370 1.9 3.5 54 6.3 5.0 126 Owl Creek 8975 1.4 2.0 70 2.9 2.5 116 South Pass 9040 4.5 4.9 92 5.5 6.6 83 St. Lawrence Alt 8620 1.2 2.5 48 4.4 3.7 119 Togwotee Pass 9580 8.4 8.4 100 12.1 8.9 136 Townsend Creek 8700 1.9 3.0 63 5.1 5.0 102 ----- ----- Basin Index (%) 84 118 BIGHORN BASIN Bald Mtn. 9380 7.9 6.5 122 6.8 6.0 113 Bear Trap Meadow 8200 .9 1.8 50 2.9 3.6 81 Bone Springs Div 9350 5.0 5.8 86 6.1 5.6 109 Grave Springs 8550 1.7 2.3 74 3.3 4.1 80 Kirwin 9550 3.6 3.9 92 6.2 4.6 135 Marquette 8760 3.0 -M * 5.2 -M * Middle Powder 7760 2.4 3.4 71 3.2 4.9 65 Owl Creek 8975 1.4 2.0 70 2.9 2.5 116 Powder River Pass 9480 -M 3.5 * 4.0 4.7 85 Shell Creek 9580 6.2 5.4 115 5.6 5.2 108 Timber Creek 7950 2.0 2.0 100 3.4 3.4 100 ----- ----- Basin Index (%) 94 100 SHOSHONE RIVER Blackwater 9780 10.8 7.9 137 14.0 7.9 177 Evening Star 9200 8.8 8.4 105 15.2 10.1 150 Marquette 8760 3.0 -M * 5.2 -M * Sylvan Road 7120 3.5 3.7 95 12.6 7.1 177 Younts Peak 8350 3.5 5.1 69 8.3 6.0 138 ----- ----- Basin Index (%) 106 161 POWDER RIVER Bear Trap Meadow 8200 .9 1.8 50 2.9 3.6 81 Cloud Peak Reservoir 9860 2.6 4.5 58 5.0 5.2 96 Grave Springs 8550 1.7 2.3 74 3.3 4.1 80 Hansen Sawmill 8360 1.6 2.0 80 3.2 3.4 94 Middle Powder 7760 2.4 3.4 71 3.2 4.9 65 Powder River Pass 9480 -M 3.5 * 4.0 4.7 85 Soldier Park 8720 1.5 -M * 3.8 -M * ----- ----- Basin Index (%) 66 83 TONGUE RIVER Big Goose 7990 2.4 2.9 83 3.7 4.4 84 Bone Springs Div 9350 5.0 5.8 86 6.1 5.6 109 Burgess Junction 7880 2.5 3.5 71 4.4 4.7 94 Dome Lake 8880 2.2 4.2 52 5.0 5.5 91 Little Goose 8870 2.6 -M * 4.6 -M * Sucker Creek 8880 3.3 3.9 85 4.2 5.3 79 Tie Creek 6870 2.1 1.1 191 4.9 4.6 107 ----- ----- Basin Index (%) 82 94 BELLE FOURCHE Cole Canyon 5910 1.6 1.1 145 2.9 3.9 74 ----- ----- Basin Index (%) 145 74 CHEYENNE RIVER BASIN Blind Park 6890 2.5 2.0 125 3.8 4.8 79 North Rapid Creek 6130 2.2 2.1 105 2.4 4.1 59 ----- ----- Basin Index (%) 115 70 UPPER N. PLATTE Arapaho Ridge 10960 7.1 6.9 103 9.1 8.5 107 Blackhall Mtn 9820 7.8 -M * 10.2 -M * Columbine 9160 7.0 5.8 121 9.2 8.6 107 Divide Peak 8880 4.2 5.7 74 6.7 7.8 86 Joe Wright 10120 5.1 7.2 71 9.4 9.4 100 Laprele Creek 8375 2.1 2.8 75 2.6 4.7 55 Med Bow 10500 10.6 -M * 11.6 -M * North French Creek 10130 6.2 8.6 72 8.2 9.0 91 Never Summer 10280 5.5 6.2 89 6.6 -M * Old Battle 10000 6.7 9.2 73 7.9 12.2 65 Rawah 9020 3.6 3.2 112 6.0 5.8 103 Sage Creek Basin 7850 3.0 3.6 83 4.5 5.4 83 Sand Lake 10050 7.4 8.6 86 7.4 8.6 86 South Brush Creek 8440 2.3 3.3 70 3.9 5.5 71 Tower 10500 9.8 14.0 70 12.1 14.0 86 Webber Springs 9250 4.5 6.8 66 8.5 9.2 92 Willow Creek Pass 9540 4.4 4.0 110 5.5 5.2 106 Zirkel 9340 7.1 6.4 111 10.9 10.2 107 ----- ----- Basin Index (%) 84 90 SWEETWATER Deer Park 9700 4.7 4.8 98 8.3 6.7 124 Larsen Creek 9000 3.3 3.4 97 7.6 -M * South Pass 9040 4.5 4.9 92 5.5 6.6 83 ----- ----- Basin Index (%) 95 104 LOWER N. PLATTE Casper Mtn. 7900 2.7 4.2 64 3.6 6.1 59 Laprele Creek 8375 2.1 2.8 75 2.6 4.7 55 Reno Hill 8400 3.4 4.5 76 3.6 5.7 63 Windy Peak 7900 1.9 2.2 86 2.6 4.1 63 ----- ----- Basin Index (%) 74 60 LARAMIE RIVER Brooklyn Lake 10240 4.5 5.7 79 5.2 7.0 74 Cinnabar Park 9574 4.3 6.8 63 7.0 8.5 82 Crow Creek 8330 1.8 3.4 53 3.2 4.3 74 Deadman Hill 10220 5.5 5.2 106 6.1 6.1 100 Rawah 9020 3.6 3.2 112 6.0 5.8 103 Roach 9700 -M 4.7 * -M 6.8 * ----- ----- Basin Index (%) 81 87 S. PLATTE Black Mountain 8920 2.9 -M * 4.6 -M * Crow Creek 8330 1.8 3.4 53 3.2 4.3 74 Deadman Hill 10220 5.5 5.2 106 6.1 6.1 100 ----- ----- Basin Index (%) 85 89 LITTLE SNAKE RIVER Battle Mountain 7440 3.0 2.4 125 -M 5.4 * Divide Peak 8880 4.2 5.7 74 6.7 7.8 86 Elk River 8700 4.7 4.3 109 6.4 6.8 94 Little Snake River 8915 6.1 4.9 124 10.8 11.0 98 Old Battle 10000 6.7 9.2 73 7.9 12.2 65 Sage Creek Basin 7850 3.0 3.6 83 4.5 5.4 83 Sandstone RS 8150 3.3 3.1 106 3.5 6.4 55 Whiskey Park 8950 6.2 6.8 91 9.5 8.9 107 ----- ----- Basin Index (%) 93 84 UPPER GREEN RIVER Big Sandy Opening 9080 5.2 4.3 121 8.1 4.9 165 Blind Bull Sum 8650 8.7 6.6 132 10.4 7.1 146 East Rim Divide 7930 3.3 2.6 127 6.7 4.1 163 Elkhart Park G.S. 9400 3.3 4.0 82 8.5 4.9 173 Gros Ventre Summit 8750 3.6 4.5 80 8.0 4.8 167 Gunsight Pass 9820 3.7 4.1 90 8.2 4.8 171 Kendall R.S. 7740 4.6 3.3 139 8.8 4.8 183 Loomis Park 8240 4.8 4.1 117 10.0 6.0 167 New Fork Lake 8340 3.9 3.0 130 4.8 4.0 120 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 3.5 3.4 103 8.8 4.8 183 Spring Creek Divide 9000 8.0 6.6 121 13.5 8.1 167 Triple Peak 8500 9.2 5.9 156 14.2 8.4 169 ----- ----- Basin Index (%) 118 165 LOWER GREEN RIVER Blacks Fork Jct 8870 3.3 -M * 4.8 -M * Buck Pasture 9700 4.7 -M * 7.2 -M * EF Blacks Fork GS 9360 3.1 -M * 5.2 -M * Hams Fork 7840 3.1 3.0 103 7.0 4.0 175 Hewinta 9519 3.1 2.4 129 5.3 5.3 100 Hickerson Park 9145 3.0 1.9 158 3.5 4.2 83 Hole-in-Rock 9150 1.8 2.1 86 3.8 4.0 95 Indian Creek 9425 7.5 7.1 106 11.2 7.3 153 Kelley R.S. 8180 5.0 4.0 125 10.6 6.2 171 Spirit Lk 10235 3.7 -M * 6.1 -M * Steel Creek Park 10200 4.9 5.0 98 6.8 6.0 113 ----- ----- Basin Index (%) 111 130 UPPER BEAR RIVER Bear River RS 8777 3.1 -M * 5.0 -M * Bug Lake 7950 6.4 4.6 139 8.4 6.9 122 Burts Miller Ranch 8000 1.7 -M * 2.8 -M * Chalk Creek #1 8993 7.1 7.5 95 9.3 9.1 102 Hayden Fork 9212 5.3 3.7 143 8.8 7.4 119 Kelley R.S. 8180 5.0 4.0 125 10.6 6.2 171 Lily Lake 9156 3.3 3.8 87 5.7 6.4 89 Monte Cristo 8960 6.4 7.2 89 10.1 8.9 113 Salt River Summit 7760 2.9 3.0 97 8.5 5.5 155 ----- ----- Basin Index (%) 108 122 ----------------------------------------------------------------------------- -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.