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: FEBRUARY 19 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.4 12.9 104 15.1 16.2 93 Blind Bull Sum 8650 16.2 16.7 97 11.0 14.9 74 Cottonwood Creek 7670 17.7 15.4 115 19.5 18.2 107 East Rim Divide 7930 7.2 7.5 96 7.1 8.8 81 Grand Targhee 9260 29.5 27.4 108 22.5 23.6 95 Granite Creek 6770 12.6 12.9 98 14.3 15.4 93 Grassy Lake 7265 22.7 24.6 92 24.8 27.7 90 Gros Ventre Summit 8750 6.4 9.1 70 -M 9.4 * Gunsight Pass 9820 8.9 9.8 91 8.5 10.2 83 Lewis Lake Divide 7850 20.7 23.9 87 23.1 27.0 86 Loomis Park 8240 10.0 10.8 93 11.4 13.0 88 Phillips Bench 8200 18.7 18.4 102 19.5 21.2 92 Salt River Summit 7640 9.3 9.7 96 10.4 12.5 83 Snake River Station 6920 12.3 13.5 91 15.8 17.6 90 Somsen Ranch 6800 9.6 10.2 94 10.8 12.7 85 Spring Creek Divide 9000 17.6 16.8 105 17.8 18.0 99 Thumb Divide 7980 10.6 11.0 96 10.9 13.7 80 Togwotee Pass 9580 18.1 16.7 108 19.7 18.1 109 Triple Peak 8500 18.2 15.7 116 18.7 18.6 101 Two Ocean Plateau 9240 19.6 20.0 98 11.3 20.2 56 Willow Creek 8080 20.4 20.2 101 21.2 24.9 85 Younts Peak 8350 11.4 11.1 103 12.5 11.9 105 ----- ----- Basin Index (%) 99 89 MADISON HEADWATERS IN WYOMING Black Bear 8170 22.6 27.6 82 22.8 28.7 79 Canyon 7870 9.8 9.7 101 10.6 12.3 86 Madison Plateau 7750 14.4 16.3 88 15.3 19.6 78 West Yellowstone 6700 8.0 8.0 100 9.9 11.0 90 Whiskey Creek 6800 10.1 11.2 90 13.1 15.2 86 ----- ----- Basin Index (%) 89 83 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 17.0 15.6 109 16.6 14.8 112 Canyon 7870 9.8 9.7 101 10.6 12.3 86 Evening Star 9200 22.0 18.1 122 23.7 20.7 114 Fisher Creek 9100 24.7 24.1 102 26.5 23.8 111 Monument Peak 8850 16.7 14.1 118 19.3 16.1 120 Northeast Entrance 7350 6.8 7.5 91 12.5 9.4 133 Parker Peak 9400 17.8 14.6 122 17.9 13.1 137 Sylvan Lake 8420 14.2 14.7 97 18.2 16.8 108 Thumb Divide 7980 10.6 11.0 96 10.9 13.7 80 Two Ocean Plateau 9240 19.6 20.0 98 11.3 20.2 56 White Mill 8700 20.6 16.8 123 20.0 17.8 112 Wolverine 7650 8.4 8.2 102 13.7 9.3 147 ----- ----- Basin Index (%) 108 107 WIND RIVER Burroughs Creek 8750 7.9 -M * 11.6 -M * Castle Creek 8400 4.2 -M * 5.9 -M * Cold Springs 9630 3.9 5.3 74 5.6 7.0 80 Deer Park 9700 6.9 10.1 68 9.1 14.2 64 Grave Springs 8550 4.0 5.8 69 4.8 7.3 66 Hobbs Park 10100 -M 8.9 * -M 8.8 * Kirwin 9550 6.9 6.3 110 7.9 8.2 96 Little Warm 9370 7.2 7.6 95 9.4 9.2 102 South Pass 9040 7.0 10.5 67 7.5 12.6 60 St. Lawrence Alt 8620 1.0 4.8 21 2.7 6.0 45 Togwotee Pass 9580 18.1 16.7 108 19.7 18.1 109 Townsend Creek 8700 3.4 6.0 57 5.0 8.1 62 ----- ----- Basin Index (%) 80 79 BIGHORN BASIN Bald Mtn. 9380 13.2 13.5 98 11.5 12.1 95 Bear Trap Meadow 8200 4.6 3.9 118 6.3 5.8 109 Bone Springs Div 9350 11.3 11.1 102 8.8 10.9 81 Grave Springs 8550 4.0 5.8 69 4.8 7.3 66 Kirwin 9550 6.9 6.3 110 7.9 8.2 96 Marquette 8760 3.4 -M * 4.5 -M * Middle Powder 7760 6.4 7.3 88 6.0 8.2 73 Owl Creek 8975 2.9 3.5 83 3.0 4.0 75 Powder River Pass 9480 8.6 7.4 116 7.3 8.9 82 Shell Creek 9580 11.0 10.4 106 9.0 9.8 92 Timber Creek 7950 1.9 3.1 61 2.8 4.9 57 ----- ----- Basin Index (%) 98 84 SHOSHONE RIVER Blackwater 9780 16.0 16.0 100 17.0 15.1 113 Evening Star 9200 22.0 18.1 122 23.7 20.7 114 Marquette 8760 3.4 -M * 4.5 -M * Sylvan Lake 8420 14.2 14.7 97 18.2 16.8 108 Sylvan Road 7120 9.6 8.8 109 10.0 13.2 76 Younts Peak 8350 11.4 11.1 103 12.5 11.9 105 ----- ----- Basin Index (%) 107 105 POWDER RIVER Bear Trap Meadow 8200 4.6 3.9 118 6.3 5.8 109 Cloud Peak Reservoir 9860 9.2 9.8 94 9.5 8.9 107 Grave Springs 8550 4.0 5.8 69 4.8 7.3 66 Hansen Sawmill 8360 4.6 4.4 105 5.4 5.6 96 Middle Powder 7760 6.4 7.3 88 6.0 8.2 73 Powder River Pass 9480 8.6 7.4 116 7.3 8.9 82 Soldier Park 8720 2.6 -M * 5.9 -M * ----- ----- Basin Index (%) 97 88 TONGUE RIVER Big Goose 7990 5.5 5.9 93 8.4 7.5 112 Bone Springs Div 9350 11.3 11.1 102 8.8 10.9 81 Burgess Junction 7880 7.5 7.6 99 9.8 8.5 115 Dome Lake 8880 7.8 8.0 98 9.2 9.4 98 Little Goose 8870 7.2 -M * 9.3 -M * Sucker Creek 8880 9.5 8.2 116 12.3 9.8 126 Tie Creek 6870 3.2 4.0 80 7.3 7.9 92 ----- ----- Basin Index (%) 100 103 BELLE FOURCHE Blind Park 6890 4.0 5.8 69 6.4 8.8 73 Cole Canyon 5910 2.6 4.6 57 5.2 6.7 78 North Rapid Creek 6130 4.5 5.5 82 6.2 7.2 86 ----- ----- Basin Index (%) 70 78 CHEYENNE RIVER BASIN Blind Park 6890 4.0 5.8 69 6.4 8.8 73 North Rapid Creek 6130 4.5 5.5 82 6.2 7.2 86 ----- ----- Basin Index (%) 75 79 UPPER N. PLATTE Arapaho Ridge 10960 15.9 15.2 105 15.3 16.4 93 Blackhall Mtn 9820 21.1 -M * -M -M * Cinnabar Park 9574 13.1 16.1 81 14.7 18.7 79 Columbine 9160 17.2 18.0 96 15.4 19.0 81 Divide Peak 8880 11.6 14.5 80 13.3 15.8 84 Joe Wright 10120 13.0 15.1 86 16.1 18.4 88 Laprele Creek 8375 5.4 6.9 78 6.7 8.7 77 Med Bow 10500 29.5 -M * 25.3 -M * Never Summer 10280 13.0 14.5 90 9.0 -M * North French Creek 10130 21.4 19.5 110 21.3 19.6 109 Old Battle 10000 21.9 22.6 97 22.7 26.2 87 Rawah 9020 7.4 7.6 97 9.2 10.1 91 Sage Creek Basin 7850 8.3 10.1 82 8.0 11.2 71 Sand Lake 10050 20.2 19.2 105 18.3 17.6 104 South Brush Creek 8440 7.8 8.9 88 7.9 10.8 73 Tower 10500 26.9 33.6 80 25.6 29.6 86 Webber Springs 9250 15.4 17.2 90 15.9 19.7 81 Whiskey Park 8950 21.9 19.7 111 20.5 21.0 98 Willow Creek Pass 9540 8.4 8.8 95 7.3 9.5 77 Zirkel 9340 16.8 21.5 78 20.1 21.9 92 ----- ----- Basin Index (%) 92 88 SWEETWATER Deer Park 9700 6.9 10.1 68 9.1 14.2 64 Larsen Creek 9000 4.7 8.7 54 6.3 -M * South Pass 9040 7.0 10.5 67 7.5 12.6 60 ----- ----- Basin Index (%) 63 62 LOWER N. PLATTE Casper Mtn. 7900 5.7 9.3 61 5.8 10.4 56 Laprele Creek 8375 5.4 6.9 78 6.7 8.7 77 Reno Hill 8400 6.4 9.1 70 7.3 10.4 70 Windy Peak 7900 3.7 5.3 70 5.4 7.3 74 ----- ----- Basin Index (%) 69 68 LARAMIE RIVER Brooklyn Lake 10240 17.1 14.2 120 18.8 14.9 126 Cinnabar Park 9574 13.1 16.1 81 14.7 18.7 79 Crow Creek 8330 1.4 6.5 22 5.2 7.4 70 Deadman Hill 10220 11.6 11.7 99 11.0 11.8 93 Rawah 9020 7.4 7.6 97 9.2 10.1 91 Roach 9700 10.0 11.8 85 11.0 13.6 81 Windy Peak 7900 3.7 5.3 70 5.4 7.3 74 ----- ----- Basin Index (%) 88 90 S. PLATTE Crow Creek 8330 1.4 6.5 22 5.2 7.4 70 ----- ----- Basin Index (%) 22 70 LITTLE SNAKE RIVER Battle Mountain 7440 7.3 8.8 83 10.1 11.4 89 Divide Peak 8880 11.6 14.5 80 13.3 15.8 84 Elk River 8700 12.4 14.0 89 9.4 14.9 63 Elkhead Divide 8780 11.9 -M * 13.0 -M * Little Snake River 8915 18.3 18.7 98 23.2 24.0 97 Old Battle 10000 21.9 22.6 97 22.7 26.2 87 Sage Creek Basin 7850 8.3 10.1 82 8.0 11.2 71 Sandstone RS 8150 10.2 10.1 101 11.3 14.0 81 Whiskey Park 8950 21.9 19.7 111 20.5 21.0 98 ----- ----- Basin Index (%) 94 86 UPPER GREEN RIVER Big Sandy Opening 9080 7.1 9.2 77 6.7 9.7 69 Blind Bull Sum 8650 16.2 16.7 97 11.0 14.9 74 East Rim Divide 7930 7.2 7.5 96 7.1 8.8 81 Elkhart Park G.S. 9400 7.4 8.8 84 6.1 9.7 63 Gros Ventre Summit 8750 6.4 9.1 70 -M 9.4 * Gunsight Pass 9820 8.9 9.8 91 8.5 10.2 83 Indian Creek 9425 14.7 17.0 86 13.1 16.5 79 Kendall R.S. 7740 9.2 9.1 101 10.3 10.8 95 Larsen Creek 9000 4.7 8.7 54 6.3 -M * Loomis Park 8240 10.0 10.8 93 11.4 13.0 88 New Fork Lake 8340 7.0 7.6 92 7.6 8.1 94 Pocket Creek 9360 -M -M * 5.8 -M * Snider Basin 8060 9.5 9.1 104 11.1 10.7 104 Spring Creek Divide 9000 17.6 16.8 105 17.8 18.0 99 Triple Peak 8500 18.2 15.7 116 18.7 18.6 101 ----- ----- Basin Index (%) 92 87 LOWER GREEN RIVER Blacks Fork Jct 8869 4.6 -M * 7.0 -M * Buck Pasture 9632 9.6 -M * 10.2 -M * EF Blacks Fork GS 9360 9.1 -M * 7.7 -M * Hams Fork 7840 9.2 8.5 108 8.3 8.5 98 Henrys Fork 10182 -M -M * 7.7 -M * Hewinta 9500 6.6 7.1 93 9.3 10.0 93 Hickerson Park 9122 4.4 5.2 85 5.4 7.0 77 Hole-in-Rock 9168 3.8 4.9 78 5.8 6.6 88 Indian Creek 9425 14.7 17.0 86 13.1 16.5 79 Kelley R.S. 8180 10.5 10.9 96 11.4 13.5 84 Spirit Lk 10235 7.4 -M * 8.3 -M * Steel Creek Park 10158 10.1 10.4 97 11.3 11.5 98 ----- ----- Basin Index (%) 93 88 UPPER BEAR RIVER Bear River RS 8777 5.7 -M * 7.6 -M * Bug Lake 7987 11.4 13.6 84 11.0 14.5 76 Burts Miller Ranch 8000 3.7 -M * 5.7 -M * Chalk Creek #1 9171 11.0 16.5 67 12.4 18.2 68 Dry Bread Pond 8302 11.2 14.3 78 11.4 14.5 79 Giveout 6930 6.4 7.7 83 8.6 9.6 90 Hayden Fork 9130 9.2 11.2 82 12.8 15.2 84 Kelley R.S. 8180 10.5 10.9 96 11.4 13.5 84 Lily Lake 9133 7.6 9.3 82 8.5 12.4 69 Monte Cristo 8932 14.9 19.3 77 14.4 19.0 76 Salt River Summit 7640 9.3 9.7 96 10.4 12.5 83 Spring Creek Divide 9000 17.6 16.8 105 17.8 18.0 99 Trial Lake 9992 12.7 16.2 78 12.6 17.4 72 ----- ----- Basin Index (%) 84 80 ----------------------------------------------------------------------------- -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.