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 15 , 2016 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 6.4 5.4 119 13.8 8.1 170 Black Bear 8170 10.1 13.0 78 19.9 14.1 141 Blind Bull Sum 8650 9.6 7.0 137 11.3 7.5 151 Cottonwood Creek 7670 7.2 6.4 112 14.1 8.9 158 East Rim Divide 7930 3.9 3.0 130 7.3 4.4 166 Grand Targhee 9260 20.1 12.8 157 19.2 12.0 160 Granite Creek 6770 5.7 4.2 136 12.1 7.3 166 Grassy Lake 7265 9.0 9.2 98 20.9 13.1 160 Gros Ventre Summit 8750 4.1 4.6 89 8.5 5.0 170 Gunsight Pass 9820 4.3 4.2 102 8.8 5.1 173 Lewis Lake Divide 7850 7.3 9.5 77 19.0 13.2 144 Phillips Bench 8200 6.8 7.9 86 16.1 10.0 161 Salt River Summit 7760 3.3 3.2 103 9.1 5.8 157 Snake River Station 6920 6.3 4.6 137 15.0 8.8 170 Spring Creek Divide 9000 8.8 7.3 121 14.3 8.6 166 Thumb Divide 7980 3.5 4.3 81 9.7 7.0 139 Togwotee Pass 9580 9.6 8.8 109 13.3 9.3 143 Two Ocean Plateau 9240 13.1 10.4 126 15.2 10.4 146 Willow Creek 8380 8.0 8.0 100 18.7 12.5 150 Younts Peak 8350 4.2 5.3 79 9.0 6.2 145 ----- ----- Basin Index (%) 109 155 MADISON-GALLATIN Black Bear 8170 10.1 13.0 78 19.9 14.1 141 Canyon 7870 3.5 3.8 92 9.5 6.2 153 Madison Plateau 7750 4.8 7.5 64 15.1 9.7 156 West Yellowstone 6700 2.5 3.0 83 9.8 5.5 178 Whiskey Creek 6800 2.5 4.4 57 10.1 7.8 129 ----- ----- Basin Index (%) 74 149 YELLOWSTONE Beartooth Lake 9360 7.8 7.6 103 5.7 7.2 79 Burnt Mtn 5880 2.3 1.6 144 6.0 5.9 102 Canyon 7870 3.5 3.8 92 9.5 6.2 153 Cole Creek 7850 4.0 5.5 73 4.0 5.6 71 Evening Star 9200 -M 8.8 * -M 10.6 * Fisher Creek 9100 9.4 11.3 83 15.0 12.0 125 Northeast Entrance 7350 2.6 2.6 100 8.0 5.0 160 Parker Peak 9400 8.9 7.6 117 11.9 7.0 170 Sylvan Lake 8420 6.2 6.9 90 16.3 9.1 179 Thumb Divide 7980 3.5 4.3 81 9.7 7.0 139 Two Ocean Plateau 9240 13.1 10.4 126 15.2 10.4 146 White Mill 8700 7.1 7.6 93 10.9 9.1 120 Wolverine 7650 4.1 3.3 124 7.9 5.1 155 ----- ----- Basin Index (%) 100 134 WIND RIVER Burroughs Creek 8750 5.0 -M * 7.3 -M * Castle Creek 8400 2.4 -M * 4.7 -M * Cold Springs 9630 2.7 2.6 104 5.0 4.3 116 Deer Park 9700 5.1 5.0 102 8.9 7.1 125 Hobbs Park 10100 5.4 5.8 93 6.7 5.3 126 Kirwin 9550 4.2 3.9 108 6.8 4.8 142 Little Warm 9370 2.5 3.6 69 7.0 5.2 135 Owl Creek 8975 1.6 2.1 76 3.1 2.5 124 South Pass 9040 5.0 5.2 96 5.8 7.0 83 St. Lawrence Alt 8620 1.4 2.6 54 4.5 3.8 118 Togwotee Pass 9580 9.6 8.8 109 13.3 9.3 143 Townsend Creek 8700 -M 3.2 * -M 5.1 * ----- ----- Basin Index (%) 95 124 BIGHORN BASIN Bald Mtn. 9380 8.3 6.7 124 7.0 6.4 109 Bear Trap Meadow 8200 1.1 2.0 55 3.0 3.7 81 Bone Springs Div 9350 5.4 6.1 89 6.4 5.8 110 Grave Springs 8550 1.9 2.4 79 3.4 4.2 81 Kirwin 9550 4.2 3.9 108 6.8 4.8 142 Marquette 8760 3.3 -M * 5.4 -M * Middle Powder 7760 2.5 3.6 69 3.2 5.2 62 Owl Creek 8975 1.6 2.1 76 3.1 2.5 124 Powder River Pass 9480 1.2 3.7 32 4.0 4.9 82 Shell Creek 9580 6.5 5.8 112 5.6 5.5 102 Timber Creek 7950 2.1 2.0 105 3.5 3.5 100 ----- ----- Basin Index (%) 91 99 SHOSHONE RIVER Blackwater 9780 11.7 8.4 139 15.0 8.3 181 Evening Star 9200 -M 8.8 * -M 10.6 * Marquette 8760 3.3 -M * 5.4 -M * Sylvan Road 7120 3.8 3.9 97 13.0 7.4 176 Younts Peak 8350 4.2 5.3 79 9.0 6.2 145 ----- ----- Basin Index (%) 112 169 POWDER RIVER Bear Trap Meadow 8200 1.1 2.0 55 3.0 3.7 81 Cloud Peak Reservoir 9860 2.7 4.8 56 5.0 5.4 93 Grave Springs 8550 1.9 2.4 79 3.4 4.2 81 Hansen Sawmill 8360 1.7 2.1 81 3.3 3.5 94 Middle Powder 7760 2.5 3.6 69 3.2 5.2 62 Powder River Pass 9480 1.2 3.7 32 4.0 4.9 82 Soldier Park 8720 1.7 -M * 3.9 -M * ----- ----- Basin Index (%) 60 81 TONGUE RIVER Big Goose 7990 2.5 3.0 83 3.7 4.6 80 Bone Springs Div 9350 5.4 6.1 89 6.4 5.8 110 Burgess Junction 7880 2.7 3.7 73 4.4 4.9 90 Dome Lake 8880 2.4 4.3 56 5.1 5.8 88 Little Goose 8870 2.8 -M * 4.8 -M * Sucker Creek 8880 3.5 4.0 88 4.3 5.6 77 Tie Creek 6870 2.1 1.1 191 5.0 4.7 106 ----- ----- Basin Index (%) 84 92 BELLE FOURCHE Cole Canyon 5910 1.7 1.1 155 2.8 4.0 70 ----- ----- Basin Index (%) 155 70 CHEYENNE RIVER BASIN Blind Park 6890 2.4 2.0 120 3.7 5.0 74 North Rapid Creek 6130 2.1 2.3 91 2.3 4.2 55 ----- ----- Basin Index (%) 105 65 UPPER N. PLATTE Arapaho Ridge 10960 7.5 7.3 103 9.4 8.9 106 Blackhall Mtn 9820 8.5 -M * 10.8 -M * Columbine 9160 7.3 6.3 116 9.8 9.1 108 Divide Peak 8880 4.6 6.1 75 7.1 8.3 86 Joe Wright 10120 5.2 7.6 68 10.0 9.9 101 Laprele Creek 8375 2.3 2.9 79 2.7 4.9 55 Med Bow 10500 12.1 -M * 13.0 -M * North French Creek 10130 7.3 9.1 80 9.2 9.6 96 Never Summer 10280 6.1 6.5 94 6.9 -M * Old Battle 10000 7.4 9.8 76 8.5 12.9 66 Rawah 9020 3.9 3.4 115 6.4 6.0 107 Sage Creek Basin 7850 3.2 4.0 80 4.6 5.7 81 Sand Lake 10050 8.2 9.0 91 8.3 9.1 91 South Brush Creek 8440 2.6 3.6 72 4.2 5.9 71 Tower 10500 10.2 15.2 67 12.9 14.9 87 Webber Springs 9250 5.2 7.5 69 8.8 9.8 90 Willow Creek Pass 9540 4.7 4.3 109 5.8 5.4 107 Zirkel 9340 8.5 7.1 120 12.4 10.9 114 ----- ----- Basin Index (%) 86 91 SWEETWATER Deer Park 9700 5.1 5.0 102 8.9 7.1 125 Larsen Creek 9000 3.6 3.6 100 8.0 -M * South Pass 9040 5.0 5.2 96 5.8 7.0 83 ----- ----- Basin Index (%) 99 104 LOWER N. PLATTE Casper Mtn. 7900 2.7 4.5 60 3.6 6.3 57 Laprele Creek 8375 2.3 2.9 79 2.7 4.9 55 Reno Hill 8400 -M 4.8 * -M 6.0 * Windy Peak 7900 2.0 2.3 87 2.7 4.3 63 ----- ----- Basin Index (%) 72 58 LARAMIE RIVER Brooklyn Lake 10240 5.5 6.2 89 6.1 7.4 82 Cinnabar Park 9574 5.3 7.2 74 8.0 9.0 89 Crow Creek 8330 1.9 3.5 54 3.3 4.4 75 Deadman Hill 10220 6.1 5.5 111 6.6 6.4 103 Rawah 9020 3.9 3.4 115 6.4 6.0 107 Roach 9700 -M 5.0 * -M 7.2 * ----- ----- Basin Index (%) 88 92 S. PLATTE Black Mountain 8920 3.2 -M * 4.8 -M * Crow Creek 8330 1.9 3.5 54 3.3 4.4 75 Deadman Hill 10220 6.1 5.5 111 6.6 6.4 103 ----- ----- Basin Index (%) 89 92 LITTLE SNAKE RIVER Battle Mountain 7440 3.0 2.6 115 5.7 5.7 100 Divide Peak 8880 4.6 6.1 75 7.1 8.3 86 Elk River 8700 4.8 4.6 104 6.5 7.2 90 Little Snake River 8915 6.7 5.6 120 11.3 11.6 97 Old Battle 10000 7.4 9.8 76 8.5 12.9 66 Sage Creek Basin 7850 3.2 4.0 80 4.6 5.7 81 Sandstone RS 8150 3.4 3.4 100 3.7 6.9 54 Whiskey Park 8950 6.8 7.2 94 10.0 9.6 104 ----- ----- Basin Index (%) 92 85 UPPER GREEN RIVER Big Sandy Opening 9080 5.6 4.5 124 8.4 5.1 165 Blind Bull Sum 8650 9.6 7.0 137 11.3 7.5 151 East Rim Divide 7930 3.9 3.0 130 7.3 4.4 166 Elkhart Park G.S. 9400 4.0 4.2 95 9.2 5.1 180 Gros Ventre Summit 8750 4.1 4.6 89 8.5 5.0 170 Gunsight Pass 9820 4.3 4.2 102 8.8 5.1 173 Kendall R.S. 7740 -M 3.5 * -M 5.2 * Loomis Park 8240 5.6 4.5 124 10.9 6.3 173 New Fork Lake 8340 4.6 3.2 144 5.4 4.2 129 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 4.1 3.6 114 9.4 5.1 184 Spring Creek Divide 9000 8.8 7.3 121 14.3 8.6 166 Triple Peak 8500 10.2 6.3 162 15.1 8.8 172 ----- ----- Basin Index (%) 124 167 LOWER GREEN RIVER Blacks Fork Jct 8870 3.7 -M * 5.1 -M * Buck Pasture 9700 5.1 -M * 7.4 -M * EF Blacks Fork GS 9360 3.6 -M * 5.1 -M * Hams Fork 7840 3.6 3.2 112 7.5 4.2 179 Hewinta 9519 3.3 2.7 122 5.7 5.5 104 Hickerson Park 9145 -M 2.0 * -M 4.3 * Hole-in-Rock 9150 2.0 2.2 91 4.0 4.0 100 Indian Creek 9425 8.3 7.6 109 11.9 7.7 155 Kelley R.S. 8180 5.6 4.3 130 11.1 6.6 168 Spirit Lk 10235 3.8 -M * 6.2 -M * Steel Creek Park 10200 5.2 5.2 100 7.0 6.3 111 ----- ----- Basin Index (%) 111 138 UPPER BEAR RIVER Bear River RS 8777 3.3 -M * 5.2 -M * Bug Lake 7950 7.1 5.0 142 8.9 7.3 122 Burts Miller Ranch 8000 1.8 -M * 3.0 -M * Chalk Creek #1 8993 7.6 8.0 95 9.8 9.6 102 Hayden Fork 9212 5.5 4.0 138 9.3 7.8 119 Kelley R.S. 8180 5.6 4.3 130 11.1 6.6 168 Lily Lake 9156 3.7 4.1 90 6.0 6.7 90 Monte Cristo 8960 7.0 7.6 92 10.7 9.4 114 Salt River Summit 7760 3.3 3.2 103 9.1 5.8 157 ----- ----- Basin Index (%) 110 122 ----------------------------------------------------------------------------- -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.