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 FRIDAY: JANUARY 26 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 11.1 10.4 107 12.8 13.3 96 Black Bear 8170 25.5 22.8 112 24.6 23.8 103 Blind Bull Sum 8650 17.9 13.1 137 11.4 12.3 93 Cottonwood Creek 7670 12.8 11.9 108 14.6 15.1 97 East Rim Divide 7930 6.4 6.6 97 6.8 7.4 92 Grand Targhee 9260 30.3 22.8 133 18.1 19.7 92 Granite Creek 6770 9.6 9.6 100 12.5 13.0 96 Grassy Lake 7265 16.8 18.7 90 20.5 22.8 90 Gros Ventre Summit 8750 9.5 8.0 119 9.0 7.8 115 Gunsight Pass 9820 9.3 7.9 118 9.6 8.5 113 Lewis Lake Divide 7850 19.3 18.5 104 21.6 22.0 98 Phillips Bench 8200 13.3 15.9 84 15.0 17.3 87 Salt River Summit 7640 5.7 7.3 78 7.6 10.1 75 Snake River Station 6920 10.3 9.8 105 14.6 14.7 99 Spring Creek Divide 9000 14.5 13.3 109 14.3 14.7 97 Thumb Divide 7980 11.3 9.1 124 12.4 11.6 107 Togwotee Pass 9580 18.7 14.0 134 19.0 15.2 125 Two Ocean Plateau 9240 23.9 16.2 148 17.8 16.5 108 Willow Creek 8080 18.3 16.4 112 21.2 20.7 102 Younts Peak 8350 -M 9.0 * -M 10.1 * ----- ----- Basin Index (%) 113 99 MADISON-GALLATIN Black Bear 8170 25.5 22.8 112 24.6 23.8 103 Canyon 7870 10.6 7.8 136 12.2 10.2 120 Madison Plateau 7750 15.6 13.8 113 16.6 16.5 101 West Yellowstone 6700 7.9 6.8 116 10.8 9.1 119 Whiskey Creek 6800 9.4 9.3 101 11.4 12.6 90 ----- ----- Basin Index (%) 114 105 YELLOWSTONE Beartooth Lake 9360 23.1 13.2 175 21.2 12.2 174 Burnt Mtn 5880 3.6 2.4 150 9.0 7.6 118 Canyon 7870 10.6 7.8 136 12.2 10.2 120 Cole Creek 7850 9.2 7.8 118 6.0 7.3 82 Evening Star 9200 24.2 15.1 160 25.6 17.2 149 Fisher Creek 9100 31.4 19.8 159 26.8 19.8 135 Northeast Entrance 7350 7.1 6.1 116 10.5 7.9 133 Parker Peak 9400 21.0 12.2 172 18.2 10.9 167 Sylvan Lake 8420 15.0 12.3 122 16.6 14.2 117 Thumb Divide 7980 11.3 9.1 124 12.4 11.6 107 Two Ocean Plateau 9240 23.9 16.2 148 17.8 16.5 108 White Mill 8700 24.3 13.8 176 17.5 14.7 119 Wolverine 7650 10.8 6.6 164 13.2 7.9 167 ----- ----- Basin Index (%) 151 131 WIND RIVER Burroughs Creek 8750 9.3 -M * 11.1 -M * Castle Creek 8400 5.3 -M * 6.5 -M * Cold Springs 9630 5.9 4.2 140 6.4 6.0 107 Deer Park 9700 7.6 8.4 90 9.1 11.8 77 Hobbs Park 10100 11.1 7.8 142 9.2 7.5 123 Kirwin 9550 12.0 5.5 218 10.6 7.0 151 Little Warm 9370 10.2 6.0 170 10.4 7.8 133 Owl Creek 8975 2.7 3.1 87 4.3 3.4 126 South Pass 9040 7.2 8.3 87 5.0 10.4 48 St. Lawrence Alt 8620 2.7 3.9 69 6.0 5.1 118 Togwotee Pass 9580 18.7 14.0 134 19.0 15.2 125 Townsend Creek 8700 4.7 4.8 98 5.9 6.8 87 ----- ----- Basin Index (%) 125 106 BIGHORN BASIN Bald Mtn. 9380 12.0 10.4 115 8.2 10.3 80 Bear Trap Meadow 8200 4.9 3.3 148 5.9 5.0 118 Bone Springs Div 9350 10.0 9.5 105 7.7 9.2 84 Grave Springs 8550 4.3 4.8 90 3.6 6.2 58 Kirwin 9550 12.0 5.5 218 10.6 7.0 151 Marquette 8760 3.5 -M * 6.7 -M * Middle Powder 7760 5.4 6.1 89 3.9 7.1 55 Owl Creek 8975 2.7 3.1 87 4.3 3.4 126 Powder River Pass 9480 9.2 6.0 153 7.9 7.6 104 Shell Creek 9580 12.2 8.8 139 8.5 8.4 101 Timber Creek 7950 2.2 3.0 73 1.5 4.3 35 ----- ----- Basin Index (%) 124 91 SHOSHONE RIVER Blackwater 9780 22.0 13.8 159 19.5 12.7 154 Evening Star 9200 24.2 15.1 160 25.6 17.2 149 Marquette 8760 3.5 -M * 6.7 -M * Sylvan Road 7120 9.1 7.5 121 13.2 11.4 116 Younts Peak 8350 -M 9.0 * -M 10.1 * ----- ----- Basin Index (%) 152 141 POWDER RIVER Bear Trap Meadow 8200 4.9 3.3 148 5.9 5.0 118 Cloud Peak Reservoir 9860 8.4 7.9 106 7.8 7.6 103 Grave Springs 8550 4.3 4.8 90 3.6 6.2 58 Hansen Sawmill 8360 4.1 3.9 105 5.4 4.8 112 Middle Powder 7760 5.4 6.1 89 3.9 7.1 55 Powder River Pass 9480 9.2 6.0 153 7.9 7.6 104 Soldier Park 8720 2.8 -M * 5.7 -M * ----- ----- Basin Index (%) 113 90 TONGUE RIVER Big Goose 7990 3.9 4.6 85 4.5 6.2 73 Bone Springs Div 9350 10.0 9.5 105 7.7 9.2 84 Burgess Junction 7880 4.6 6.4 72 4.4 7.2 61 Dome Lake 8880 6.6 6.5 102 6.1 8.0 76 Little Goose 8870 4.7 -M * 6.8 -M * Sucker Creek 8880 5.3 6.9 77 -M 8.3 * Tie Creek 6870 1.9 3.1 61 5.1 6.8 75 ----- ----- Basin Index (%) 87 74 BELLE FOURCHE Cole Canyon 5910 3.5 3.1 113 5.3 5.5 96 ----- ----- Basin Index (%) 113 96 CHEYENNE RIVER BASIN Blind Park 6890 4.4 4.2 105 6.5 7.5 87 North Rapid Creek 6130 4.6 4.0 115 5.0 6.0 83 ----- ----- Basin Index (%) 110 85 UPPER N. PLATTE Arapaho Ridge 10960 11.7 12.2 96 11.7 13.5 87 Blackhall Mtn 9820 15.1 -M * 15.4 -M * Columbine 9160 5.3 13.9 38 13.6 15.6 87 Divide Peak 8880 8.5 11.6 73 11.9 13.1 91 Joe Wright 10120 9.9 12.5 79 16.8 15.3 110 Laprele Creek 8375 4.1 5.3 77 5.7 7.2 79 Med Bow 10500 23.6 -M * 20.0 -M * North French Creek 10130 16.7 15.3 109 17.0 16.1 106 Never Summer 10280 10.4 11.5 90 8.9 -M * Old Battle 10000 14.5 18.2 80 13.9 21.4 65 Rawah 9020 6.6 5.9 112 9.5 8.9 107 Sage Creek Basin 7850 6.0 7.8 77 7.2 9.3 77 Sand Lake 10050 15.8 15.8 100 13.0 14.5 90 South Brush Creek 8440 6.1 7.0 87 7.7 9.1 85 Tower 10500 17.2 25.9 66 18.3 24.3 75 Webber Springs 9250 10.4 12.9 81 12.7 16.3 78 Willow Creek Pass 9540 8.2 7.0 117 8.8 8.0 110 Zirkel 9340 11.7 17.2 68 16.7 17.7 94 ----- ----- Basin Index (%) 82 88 SWEETWATER Deer Park 9700 7.6 8.4 90 9.1 11.8 77 Larsen Creek 9000 4.6 6.8 68 7.2 -M * South Pass 9040 7.2 8.3 87 5.0 10.4 48 ----- ----- Basin Index (%) 83 64 LOWER N. PLATTE Casper Mtn. 7900 5.1 7.3 70 4.1 8.7 47 Laprele Creek 8375 4.1 5.3 77 5.7 7.2 79 Reno Hill 8400 6.3 7.5 84 7.4 8.6 86 Windy Peak 7900 3.9 4.0 98 5.3 6.2 85 ----- ----- Basin Index (%) 80 73 LARAMIE RIVER Brooklyn Lake 10240 13.6 11.7 116 14.4 12.3 117 Cinnabar Park 9574 14.1 12.7 111 16.4 15.2 108 Crow Creek 8330 1.9 5.6 34 7.2 6.3 114 Deadman Hill 10220 11.6 9.3 125 11.4 9.8 116 Rawah 9020 6.6 5.9 112 9.5 8.9 107 Roach 9700 8.5 9.6 89 11.1 11.4 97 ----- ----- Basin Index (%) 103 110 S. PLATTE Black Mountain 8920 5.7 -M * 8.3 -M * Crow Creek 8330 1.9 5.6 34 7.2 6.3 114 Deadman Hill 10220 11.6 9.3 125 11.4 9.8 116 ----- ----- Basin Index (%) 91 116 LITTLE SNAKE RIVER Battle Mountain 7440 3.4 6.6 52 -M 9.3 * Divide Peak 8880 8.5 11.6 73 11.9 13.1 91 Elk River 8700 8.2 10.3 80 9.7 12.2 80 Little Snake River 8915 11.0 14.4 76 16.2 19.7 82 Old Battle 10000 14.5 18.2 80 13.9 21.4 65 Sage Creek Basin 7850 6.0 7.8 77 7.2 9.3 77 Sandstone RS 8150 5.2 7.5 69 5.2 11.4 46 Whiskey Park 8950 12.0 15.0 80 14.8 17.0 87 ----- ----- Basin Index (%) 75 76 UPPER GREEN RIVER Big Sandy Opening 9080 8.0 7.5 107 8.2 8.0 102 Blind Bull Sum 8650 17.9 13.1 137 11.4 12.3 93 East Rim Divide 7930 6.4 6.6 97 6.8 7.4 92 Elkhart Park G.S. 9400 7.1 7.1 100 7.1 8.1 88 Gros Ventre Summit 8750 9.5 8.0 119 9.0 7.8 115 Gunsight Pass 9820 9.3 7.9 118 9.6 8.5 113 Kendall R.S. 7740 8.5 7.5 113 9.3 8.8 106 Loomis Park 8240 9.3 9.2 101 10.0 10.8 93 New Fork Lake 8340 6.8 6.5 105 6.3 6.8 93 Pocket Creek 9360 6.3 -M * 5.5 -M * Snider Basin 8060 6.8 7.1 96 8.6 8.8 98 Spring Creek Divide 9000 14.5 13.3 109 14.3 14.7 97 Triple Peak 8500 14.9 12.1 123 16.9 15.2 111 ----- ----- Basin Index (%) 112 100 LOWER GREEN RIVER Blacks Fork Jct 8869 4.7 -M * 6.0 -M * Buck Pasture 9632 7.4 -M * 8.0 -M * EF Blacks Fork GS 9360 4.5 -M * 4.5 -M * Hams Fork 7840 4.9 6.8 72 5.5 7.0 79 Hewinta 9500 5.1 5.2 98 7.2 8.2 88 Hickerson Park 9122 4.4 3.5 126 4.0 5.9 68 Hole-in-Rock 9168 3.8 3.8 100 4.4 5.5 80 Indian Creek 9425 12.0 13.8 87 9.2 13.4 69 Kelley R.S. 8180 7.3 8.6 85 8.5 11.0 77 Spirit Lk 10235 4.9 -M * 5.7 -M * Steel Creek Park 10158 8.4 8.2 102 8.5 9.5 89 ----- ----- Basin Index (%) 92 78 UPPER BEAR RIVER Bear River RS 8777 5.4 -M * 6.9 -M * Bug Lake 7987 9.4 9.7 97 10.1 11.9 85 Burts Miller Ranch 8000 4.2 -M * 4.4 -M * Chalk Creek #1 9171 9.0 12.8 70 9.8 15.0 65 Hayden Fork 9130 7.5 8.1 93 9.4 12.5 75 Kelley R.S. 8180 7.3 8.6 85 8.5 11.0 77 Lily Lake 9133 6.7 7.1 94 7.2 10.2 71 Monte Cristo 8932 12.2 14.8 82 12.0 15.6 77 Salt River Summit 7640 5.7 7.3 78 7.6 10.1 75 ----- ----- Basin Index (%) 85 75 ----------------------------------------------------------------------------- -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.