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: FEBRUARY 24 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.2 13.1 108 16.0 16.8 95 Blind Bull Sum 8650 17.6 17.4 101 12.0 15.5 77 Cottonwood Creek 7670 18.9 16.1 117 20.8 18.9 110 East Rim Divide 7930 7.9 7.7 103 7.6 9.2 83 Grand Targhee 9260 -M 28.6 * 24.0 24.1 100 Granite Creek 6770 13.8 13.2 105 15.4 16.0 96 Grassy Lake 7265 24.5 25.2 97 26.4 28.8 92 Gros Ventre Summit 8750 7.1 9.4 76 -M 9.8 * Gunsight Pass 9820 9.8 10.2 96 9.2 10.5 88 Lewis Lake Divide 7850 22.5 24.9 90 24.6 28.1 88 Loomis Park 8240 11.0 11.4 96 12.3 13.6 90 Phillips Bench 8200 20.5 19.1 107 21.1 22.1 95 Salt River Summit 7640 9.9 10.3 96 11.0 13.0 85 Snake River Station 6920 13.1 13.8 95 16.8 18.2 92 Somsen Ranch 6800 10.4 10.5 99 11.6 13.2 88 Spring Creek Divide 9000 19.2 17.6 109 19.1 18.7 102 Thumb Divide 7980 11.3 11.5 98 11.5 14.2 81 Togwotee Pass 9580 19.2 17.2 112 21.0 18.8 112 Triple Peak 8500 19.6 16.3 120 20.2 19.6 103 Two Ocean Plateau 9240 21.0 21.0 100 11.8 21.0 56 Willow Creek 8080 21.9 21.5 102 22.6 26.0 87 Younts Peak 8350 12.4 11.4 109 13.2 12.3 107 ----- ----- Basin Index (%) 102 92 MADISON HEADWATERS IN WYOMING Black Bear 8170 24.2 28.5 85 24.1 29.9 81 Canyon 7870 10.2 10.2 100 11.0 12.7 87 Madison Plateau 7750 15.2 17.3 88 16.0 20.5 78 West Yellowstone 6700 8.3 8.5 98 10.2 11.3 90 Whiskey Creek 6800 10.6 11.6 91 13.6 15.8 86 ----- ----- Basin Index (%) 90 83 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 17.9 16.0 112 17.4 15.2 114 Canyon 7870 10.2 10.2 100 11.0 12.7 87 Evening Star 9200 23.6 18.7 126 24.8 21.5 115 Fisher Creek 9100 26.5 25.0 106 28.0 24.8 113 Monument Peak 8850 17.9 14.8 121 20.4 16.6 123 Northeast Entrance 7350 7.4 7.7 96 13.0 9.6 135 Parker Peak 9400 18.9 15.4 123 18.2 13.6 134 Sylvan Lake 8420 15.2 15.4 99 19.3 17.4 111 Thumb Divide 7980 11.3 11.5 98 11.5 14.2 81 Two Ocean Plateau 9240 21.0 21.0 100 11.8 21.0 56 White Mill 8700 22.2 17.8 125 21.2 18.5 115 Wolverine 7650 9.2 8.4 110 14.1 9.7 145 ----- ----- Basin Index (%) 111 108 WIND RIVER Burroughs Creek 8750 8.7 -M * 12.2 -M * Castle Creek 8400 4.5 -M * 6.3 -M * Cold Springs 9630 4.0 5.4 74 5.7 7.2 79 Deer Park 9700 7.2 10.5 69 9.6 14.5 66 Grave Springs 8550 4.2 6.3 67 4.8 7.5 64 Hobbs Park 10100 -M 9.2 * -M 9.1 * Kirwin 9550 7.1 6.7 106 8.1 8.5 95 Little Warm 9370 7.8 7.7 101 10.0 9.5 105 South Pass 9040 7.4 10.9 68 8.0 13.0 62 St. Lawrence Alt 8620 .5 5.0 10 2.7 6.2 44 Togwotee Pass 9580 19.2 17.2 112 21.0 18.8 112 Townsend Creek 8700 3.5 6.2 56 5.0 8.4 60 ----- ----- Basin Index (%) 80 80 BIGHORN BASIN Bald Mtn. 9380 13.6 14.1 96 11.6 12.6 92 Bear Trap Meadow 8200 5.2 4.1 127 6.7 5.9 114 Bone Springs Div 9350 11.8 11.4 104 9.1 11.3 81 Grave Springs 8550 4.2 6.3 67 4.8 7.5 64 Kirwin 9550 7.1 6.7 106 8.1 8.5 95 Marquette 8760 3.2 -M * 4.7 -M * Middle Powder 7760 7.0 7.6 92 6.4 8.4 76 Owl Creek 8975 3.3 3.7 89 3.4 4.2 81 Powder River Pass 9480 8.9 7.6 117 7.6 9.2 83 Shell Creek 9580 11.5 10.9 106 9.3 10.2 91 Timber Creek 7950 1.9 3.1 61 3.0 5.0 60 ----- ----- Basin Index (%) 99 85 SHOSHONE RIVER Blackwater 9780 17.1 16.7 102 18.1 15.6 116 Evening Star 9200 23.6 18.7 126 24.8 21.5 115 Marquette 8760 3.2 -M * 4.7 -M * Sylvan Lake 8420 15.2 15.4 99 19.3 17.4 111 Sylvan Road 7120 10.0 9.0 111 -M 13.6 * Younts Peak 8350 12.4 11.4 109 13.2 12.3 107 ----- ----- Basin Index (%) 110 113 POWDER RIVER Bear Trap Meadow 8200 5.2 4.1 127 6.7 5.9 114 Cloud Peak Reservoir 9860 9.8 10.1 97 10.0 9.2 109 Grave Springs 8550 4.2 6.3 67 4.8 7.5 64 Hansen Sawmill 8360 5.0 4.5 111 5.6 5.8 97 Middle Powder 7760 7.0 7.6 92 6.4 8.4 76 Powder River Pass 9480 8.9 7.6 117 7.6 9.2 83 Soldier Park 8720 3.2 -M * 6.4 -M * ----- ----- Basin Index (%) 100 89 TONGUE RIVER Big Goose 7990 5.8 6.0 97 8.6 7.6 113 Bone Springs Div 9350 11.8 11.4 104 9.1 11.3 81 Burgess Junction 7880 7.7 7.9 97 10.0 8.7 115 Dome Lake 8880 8.7 8.3 105 9.4 9.7 97 Little Goose 8870 7.6 -M * 9.6 -M * Sucker Creek 8880 9.8 8.5 115 12.7 10.1 126 Tie Creek 6870 3.3 4.2 79 7.4 8.0 92 ----- ----- Basin Index (%) 102 103 BELLE FOURCHE Blind Park 6890 4.3 6.1 70 6.9 9.0 77 Cole Canyon 5910 3.2 4.8 67 5.6 6.9 81 North Rapid Creek 6130 4.7 5.7 82 6.3 7.3 86 ----- ----- Basin Index (%) 73 81 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.1 70 6.9 9.0 77 North Rapid Creek 6130 4.7 5.7 82 6.3 7.3 86 ----- ----- Basin Index (%) 76 81 UPPER N. PLATTE Arapaho Ridge 10960 16.4 15.8 104 15.7 17.0 92 Blackhall Mtn 9820 22.3 -M * 20.8 -M * Cinnabar Park 9574 13.9 16.5 84 15.4 19.1 81 Columbine 9160 18.3 19.0 96 16.7 19.6 85 Divide Peak 8880 12.0 15.2 79 13.8 16.4 84 Joe Wright 10120 13.8 15.7 88 16.9 19.3 88 Laprele Creek 8375 6.1 7.4 82 7.3 9.0 81 Med Bow 10500 31.3 -M * 26.3 -M * Never Summer 10280 13.5 15.4 88 9.7 -M * North French Creek 10130 22.7 20.2 112 22.6 20.3 111 Old Battle 10000 22.8 23.3 98 23.7 27.1 87 Rawah 9020 7.6 8.2 93 9.4 10.3 91 Sage Creek Basin 7850 8.6 10.4 83 8.4 11.4 74 Sand Lake 10050 21.7 20.3 107 19.7 18.3 108 South Brush Creek 8440 8.2 9.7 85 8.3 11.3 73 Tower 10500 28.6 35.2 81 27.0 30.9 87 Webber Springs 9250 16.1 18.1 89 16.7 20.4 82 Whiskey Park 8950 23.1 20.5 113 21.4 21.7 99 Willow Creek Pass 9540 8.6 9.1 95 7.7 10.0 77 Zirkel 9340 17.8 22.4 79 -M 22.6 * ----- ----- Basin Index (%) 93 89 SWEETWATER Deer Park 9700 7.2 10.5 69 9.6 14.5 66 Larsen Creek 9000 5.8 9.1 64 6.7 -M * South Pass 9040 7.4 10.9 68 8.0 13.0 62 ----- ----- Basin Index (%) 67 64 LOWER N. PLATTE Casper Mtn. 7900 6.2 9.7 64 6.3 10.7 59 Laprele Creek 8375 6.1 7.4 82 7.3 9.0 81 Reno Hill 8400 7.5 9.5 79 8.8 10.7 82 Windy Peak 7900 4.4 5.6 79 6.1 7.5 81 ----- ----- Basin Index (%) 75 75 LARAMIE RIVER Brooklyn Lake 10240 18.2 14.6 125 19.9 15.5 128 Cinnabar Park 9574 13.9 16.5 84 15.4 19.1 81 Crow Creek 8330 1.5 6.6 23 5.4 7.6 71 Deadman Hill 10220 12.3 12.1 102 11.5 12.3 93 Rawah 9020 7.6 8.2 93 9.4 10.3 91 Roach 9700 10.2 12.1 84 11.3 14.2 80 Windy Peak 7900 4.4 5.6 79 6.1 7.5 81 ----- ----- Basin Index (%) 90 91 S. PLATTE Crow Creek 8330 1.5 6.6 23 5.4 7.6 71 ----- ----- Basin Index (%) 23 71 LITTLE SNAKE RIVER Battle Mountain 7440 7.4 9.4 79 10.3 11.8 87 Divide Peak 8880 12.0 15.2 79 13.8 16.4 84 Elk River 8700 12.9 14.6 88 9.9 15.5 64 Elkhead Divide 8780 12.3 -M * 13.2 -M * Little Snake River 8915 19.2 19.3 99 24.1 24.3 99 Old Battle 10000 22.8 23.3 98 23.7 27.1 87 Sage Creek Basin 7850 8.6 10.4 83 8.4 11.4 74 Sandstone RS 8150 10.6 10.3 103 11.6 14.6 79 Whiskey Park 8950 23.1 20.5 113 21.4 21.7 99 ----- ----- Basin Index (%) 95 86 UPPER GREEN RIVER Big Sandy Opening 9080 7.5 9.6 78 7.1 10.1 70 Blind Bull Sum 8650 17.6 17.4 101 12.0 15.5 77 East Rim Divide 7930 7.9 7.7 103 7.6 9.2 83 Elkhart Park G.S. 9400 7.8 9.1 86 6.6 10.1 65 Gros Ventre Summit 8750 7.1 9.4 76 -M 9.8 * Gunsight Pass 9820 9.8 10.2 96 9.2 10.5 88 Indian Creek 9425 16.1 18.0 89 14.2 17.2 83 Kendall R.S. 7740 10.0 9.6 104 11.0 11.3 97 Larsen Creek 9000 5.8 9.1 64 6.7 -M * Loomis Park 8240 11.0 11.4 96 12.3 13.6 90 New Fork Lake 8340 7.5 7.9 95 8.0 8.5 94 Pocket Creek 9360 -M -M * 6.0 -M * Snider Basin 8060 10.1 9.2 110 11.7 11.2 104 Spring Creek Divide 9000 19.2 17.6 109 19.1 18.7 102 Triple Peak 8500 19.6 16.3 120 20.2 19.6 103 ----- ----- Basin Index (%) 97 89 LOWER GREEN RIVER Blacks Fork Jct 8869 4.8 -M * 7.3 -M * Buck Pasture 9632 9.9 -M * 10.6 -M * EF Blacks Fork GS 9360 9.3 -M * 8.0 -M * Hams Fork 7840 9.7 8.8 110 8.7 8.9 98 Henrys Fork 10182 -M -M * 7.9 -M * Hewinta 9500 6.9 7.5 92 9.5 10.4 91 Hickerson Park 9122 4.5 5.5 82 5.4 7.3 74 Hole-in-Rock 9168 4.0 5.3 75 6.0 6.8 88 Indian Creek 9425 16.1 18.0 89 14.2 17.2 83 Kelley R.S. 8180 11.3 11.4 99 12.1 14.2 85 Spirit Lk 10235 7.5 -M * 8.5 -M * Steel Creek Park 10158 10.5 11.0 95 11.8 12.0 98 ----- ----- Basin Index (%) 93 88 UPPER BEAR RIVER Bear River RS 8777 5.9 -M * 7.8 -M * Bug Lake 7987 12.5 14.2 88 11.8 15.0 79 Burts Miller Ranch 8000 3.8 -M * 5.8 -M * Chalk Creek #1 9171 11.3 17.5 65 12.7 18.8 68 Dry Bread Pond 8302 11.5 14.9 77 11.8 15.0 79 Giveout 6930 6.7 8.2 82 8.9 10.0 89 Hayden Fork 9130 9.6 11.5 83 13.1 15.8 83 Kelley R.S. 8180 11.3 11.4 99 12.1 14.2 85 Lily Lake 9133 7.9 9.8 81 8.8 12.8 69 Monte Cristo 8932 15.8 19.9 79 15.1 19.9 76 Salt River Summit 7640 9.9 10.3 96 11.0 13.0 85 Spring Creek Divide 9000 19.2 17.6 109 19.1 18.7 102 Trial Lake 9992 13.2 17.0 78 13.0 18.2 71 ----- ----- Basin Index (%) 85 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.