Supercell over Laramie
WRDS/SCO may be working remotely so there could be a slight delay returning phone calls. Please email wrds@uwyo.edu if you are in need of information and we will respond as soon as possible

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: FEBRUARY 22 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.1 13.1 108 15.8 16.6 95 Blind Bull Sum 8650 17.2 17.2 100 11.5 15.3 75 Cottonwood Creek 7670 18.6 15.9 117 20.5 18.6 110 East Rim Divide 7930 7.7 7.6 101 7.6 9.1 84 Grand Targhee 9260 31.4 28.1 112 23.7 23.8 100 Granite Creek 6770 13.7 13.0 105 15.3 15.8 97 Grassy Lake 7265 24.0 24.9 96 26.0 28.3 92 Gros Ventre Summit 8750 6.9 9.3 74 -M 9.6 * Gunsight Pass 9820 9.4 10.1 93 9.0 10.4 87 Lewis Lake Divide 7850 21.8 24.6 89 24.0 27.6 87 Loomis Park 8240 10.7 11.1 96 12.1 13.4 90 Phillips Bench 8200 20.0 18.9 106 20.6 21.7 95 Salt River Summit 7640 9.9 10.1 98 11.0 12.8 86 Snake River Station 6920 12.9 13.7 94 16.6 17.9 93 Somsen Ranch 6800 10.4 10.4 100 11.7 13.0 90 Spring Creek Divide 9000 18.7 17.3 108 18.7 18.4 102 Thumb Divide 7980 10.9 11.3 96 11.3 14.0 81 Togwotee Pass 9580 18.8 17.0 111 20.5 18.5 111 Triple Peak 8500 19.3 16.1 120 20.0 19.1 105 Two Ocean Plateau 9240 20.3 20.6 99 11.7 20.7 57 Willow Creek 8080 21.6 21.0 103 22.4 25.5 88 Younts Peak 8350 12.2 11.2 109 13.1 12.2 107 ----- ----- Basin Index (%) 102 92 MADISON HEADWATERS IN WYOMING Black Bear 8170 23.6 28.1 84 23.6 29.4 80 Canyon 7870 10.2 10.0 102 11.0 12.5 88 Madison Plateau 7750 14.8 17.0 87 15.7 20.1 78 West Yellowstone 6700 8.2 8.3 99 10.2 11.2 91 Whiskey Creek 6800 10.5 11.4 92 13.6 15.6 87 ----- ----- Basin Index (%) 90 83 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 17.4 15.9 109 16.9 15.1 112 Canyon 7870 10.2 10.0 102 11.0 12.5 88 Evening Star 9200 22.5 18.5 122 24.3 21.2 115 Fisher Creek 9100 25.3 24.8 102 27.1 24.4 111 Monument Peak 8850 17.1 14.5 118 19.8 16.4 121 Northeast Entrance 7350 7.0 7.6 92 12.7 9.5 134 Parker Peak 9400 18.3 15.1 121 18.1 13.4 135 Sylvan Lake 8420 14.7 15.1 97 18.4 17.2 107 Thumb Divide 7980 10.9 11.3 96 11.3 14.0 81 Two Ocean Plateau 9240 20.3 20.6 99 11.7 20.7 57 White Mill 8700 21.0 17.5 120 20.5 18.2 113 Wolverine 7650 8.9 8.3 107 14.0 9.5 147 ----- ----- Basin Index (%) 108 107 WIND RIVER Burroughs Creek 8750 8.5 -M * 12.4 -M * Castle Creek 8400 4.6 -M * 6.3 -M * Cold Springs 9630 4.0 5.3 75 5.7 7.1 80 Deer Park 9700 7.3 10.3 71 9.6 14.4 67 Grave Springs 8550 4.2 6.1 69 5.0 7.4 68 Hobbs Park 10100 -M 9.1 * -M 9.0 * Kirwin 9550 7.2 6.5 111 8.3 8.4 99 Little Warm 9370 7.5 7.7 97 9.7 9.4 103 South Pass 9040 7.4 10.7 69 8.0 12.8 62 St. Lawrence Alt 8620 1.2 4.9 24 2.8 6.1 46 Togwotee Pass 9580 18.8 17.0 111 20.5 18.5 111 Townsend Creek 8700 3.6 6.1 59 5.1 8.3 61 ----- ----- Basin Index (%) 82 81 BIGHORN BASIN Bald Mtn. 9380 13.5 13.9 97 12.0 12.4 97 Bear Trap Meadow 8200 4.9 4.0 122 6.5 5.8 112 Bone Springs Div 9350 11.8 11.2 105 9.1 11.1 82 Grave Springs 8550 4.2 6.1 69 5.0 7.4 68 Kirwin 9550 7.2 6.5 111 8.3 8.4 99 Marquette 8760 3.4 -M * 4.7 -M * Middle Powder 7760 6.6 7.5 88 6.1 8.3 73 Owl Creek 8975 3.4 3.6 94 3.6 4.1 88 Powder River Pass 9480 8.7 7.5 116 7.5 9.1 82 Shell Creek 9580 11.2 10.7 105 9.2 10.0 92 Timber Creek 7950 1.9 3.1 61 2.9 4.9 59 ----- ----- Basin Index (%) 99 86 SHOSHONE RIVER Blackwater 9780 16.4 16.5 99 17.4 15.4 113 Evening Star 9200 22.5 18.5 122 24.3 21.2 115 Marquette 8760 3.4 -M * 4.7 -M * Sylvan Lake 8420 14.7 15.1 97 18.4 17.2 107 Sylvan Road 7120 9.6 8.8 109 -M 13.4 * Younts Peak 8350 12.2 11.2 109 13.1 12.2 107 ----- ----- Basin Index (%) 108 111 POWDER RIVER Bear Trap Meadow 8200 4.9 4.0 122 6.5 5.8 112 Cloud Peak Reservoir 9860 9.3 10.0 93 9.6 9.1 105 Grave Springs 8550 4.2 6.1 69 5.0 7.4 68 Hansen Sawmill 8360 5.0 4.4 114 5.7 5.7 100 Middle Powder 7760 6.6 7.5 88 6.1 8.3 73 Powder River Pass 9480 8.7 7.5 116 7.5 9.1 82 Soldier Park 8720 3.2 -M * 6.3 -M * ----- ----- Basin Index (%) 98 89 TONGUE RIVER Big Goose 7990 5.8 6.0 97 8.4 7.5 112 Bone Springs Div 9350 11.8 11.2 105 9.1 11.1 82 Burgess Junction 7880 7.6 7.8 97 10.0 8.6 116 Dome Lake 8880 8.2 8.2 100 9.4 9.5 99 Little Goose 8870 7.4 -M * 9.4 -M * Sucker Creek 8880 9.7 8.4 115 12.5 10.0 125 Tie Creek 6870 3.4 4.2 81 7.5 8.0 94 ----- ----- Basin Index (%) 102 104 BELLE FOURCHE Blind Park 6890 4.0 5.9 68 6.6 8.9 74 Cole Canyon 5910 2.8 4.7 60 5.3 6.8 78 North Rapid Creek 6130 4.6 5.6 82 6.2 7.2 86 ----- ----- Basin Index (%) 70 79 CHEYENNE RIVER BASIN Blind Park 6890 4.0 5.9 68 6.6 8.9 74 North Rapid Creek 6130 4.6 5.6 82 6.2 7.2 86 ----- ----- Basin Index (%) 75 80 UPPER N. PLATTE Arapaho Ridge 10960 16.3 15.6 104 15.7 16.8 93 Blackhall Mtn 9820 22.2 -M * 20.9 -M * Cinnabar Park 9574 13.9 16.3 85 15.4 19.0 81 Columbine 9160 18.1 18.6 97 15.8 19.4 81 Divide Peak 8880 12.1 14.9 81 13.7 16.2 85 Joe Wright 10120 13.8 15.4 90 16.8 19.0 88 Laprele Creek 8375 6.0 7.2 83 7.1 8.9 80 Med Bow 10500 31.2 -M * 26.2 -M * Never Summer 10280 13.3 15.0 89 9.6 -M * North French Creek 10130 22.5 19.8 114 22.4 20.1 111 Old Battle 10000 22.8 23.1 99 23.6 26.8 88 Rawah 9020 7.7 7.9 97 9.4 10.3 91 Sage Creek Basin 7850 8.6 10.4 83 8.4 11.3 74 Sand Lake 10050 21.6 19.9 109 19.6 18.0 109 South Brush Creek 8440 8.2 9.4 87 8.3 11.1 75 Tower 10500 28.4 34.7 82 26.5 30.4 87 Webber Springs 9250 16.1 17.8 90 16.6 20.2 82 Whiskey Park 8950 22.9 20.2 113 21.4 21.5 100 Willow Creek Pass 9540 8.6 9.0 96 7.7 9.8 79 Zirkel 9340 17.8 22.1 81 20.9 22.4 93 ----- ----- Basin Index (%) 94 89 SWEETWATER Deer Park 9700 7.3 10.3 71 9.6 14.4 67 Larsen Creek 9000 5.6 9.0 62 6.8 -M * South Pass 9040 7.4 10.7 69 8.0 12.8 62 ----- ----- Basin Index (%) 68 65 LOWER N. PLATTE Casper Mtn. 7900 6.1 9.5 64 6.3 10.5 60 Laprele Creek 8375 6.0 7.2 83 7.1 8.9 80 Reno Hill 8400 7.3 9.3 78 8.5 10.5 81 Windy Peak 7900 4.3 5.5 78 5.9 7.5 79 ----- ----- Basin Index (%) 75 74 LARAMIE RIVER Brooklyn Lake 10240 18.1 14.5 125 19.7 15.3 129 Cinnabar Park 9574 13.9 16.3 85 15.4 19.0 81 Crow Creek 8330 1.6 6.6 24 5.5 7.5 73 Deadman Hill 10220 12.2 12.0 102 11.5 12.1 95 Rawah 9020 7.7 7.9 97 9.4 10.3 91 Roach 9700 10.2 12.0 85 11.3 14.0 81 Windy Peak 7900 4.3 5.5 78 5.9 7.5 79 ----- ----- Basin Index (%) 91 92 S. PLATTE Crow Creek 8330 1.6 6.6 24 5.5 7.5 73 ----- ----- Basin Index (%) 24 73 LITTLE SNAKE RIVER Battle Mountain 7440 7.6 9.1 84 10.5 11.6 91 Divide Peak 8880 12.1 14.9 81 13.7 16.2 85 Elk River 8700 12.8 14.4 89 9.7 15.3 63 Elkhead Divide 8780 12.3 -M * 13.3 -M * Little Snake River 8915 19.3 19.0 102 24.1 24.3 99 Old Battle 10000 22.8 23.1 99 23.6 26.8 88 Sage Creek Basin 7850 8.6 10.4 83 8.4 11.3 74 Sandstone RS 8150 10.5 10.3 102 11.7 14.4 81 Whiskey Park 8950 22.9 20.2 113 21.4 21.5 100 ----- ----- Basin Index (%) 96 87 UPPER GREEN RIVER Big Sandy Opening 9080 7.4 9.5 78 7.1 9.9 72 Blind Bull Sum 8650 17.2 17.2 100 11.5 15.3 75 East Rim Divide 7930 7.7 7.6 101 7.6 9.1 84 Elkhart Park G.S. 9400 7.8 9.0 87 6.5 10.0 65 Gros Ventre Summit 8750 6.9 9.3 74 -M 9.6 * Gunsight Pass 9820 9.4 10.1 93 9.0 10.4 87 Indian Creek 9425 15.7 17.6 89 13.9 16.9 82 Kendall R.S. 7740 9.9 9.4 105 10.9 11.0 99 Larsen Creek 9000 5.6 9.0 62 6.8 -M * Loomis Park 8240 10.7 11.1 96 12.1 13.4 90 New Fork Lake 8340 7.4 7.8 95 8.1 8.3 98 Pocket Creek 9360 -M -M * 6.1 -M * Snider Basin 8060 10.1 9.2 110 11.6 11.0 105 Spring Creek Divide 9000 18.7 17.3 108 18.7 18.4 102 Triple Peak 8500 19.3 16.1 120 20.0 19.1 105 ----- ----- Basin Index (%) 96 90 LOWER GREEN RIVER Blacks Fork Jct 8869 5.0 -M * 7.3 -M * Buck Pasture 9632 10.0 -M * 10.7 -M * EF Blacks Fork GS 9360 6.6 -M * 8.1 -M * Hams Fork 7840 9.7 8.7 111 8.6 8.7 99 Henrys Fork 10182 -M -M * 8.0 -M * Hewinta 9500 6.9 7.4 93 9.6 10.3 93 Hickerson Park 9122 4.5 5.4 83 5.5 7.2 76 Hole-in-Rock 9168 4.0 5.2 77 6.0 6.8 88 Indian Creek 9425 15.7 17.6 89 13.9 16.9 82 Kelley R.S. 8180 11.1 11.2 99 12.1 13.9 87 Spirit Lk 10235 7.6 -M * 8.5 -M * Steel Creek Park 10158 10.5 10.8 97 11.8 11.8 100 ----- ----- Basin Index (%) 94 89 UPPER BEAR RIVER Bear River RS 8777 6.0 -M * 7.8 -M * Bug Lake 7987 12.5 14.0 89 11.8 14.8 80 Burts Miller Ranch 8000 3.8 -M * 5.8 -M * Chalk Creek #1 9171 11.4 17.2 66 12.8 18.6 69 Dry Bread Pond 8302 11.8 14.7 80 11.9 14.8 80 Giveout 6930 6.8 8.0 85 8.8 9.9 89 Hayden Fork 9130 9.5 11.4 83 13.2 15.6 85 Kelley R.S. 8180 11.1 11.2 99 12.1 13.9 87 Lily Lake 9133 7.9 9.7 81 8.8 12.7 69 Monte Cristo 8932 15.9 19.7 81 15.1 19.5 77 Salt River Summit 7640 9.9 10.1 98 11.0 12.8 86 Spring Creek Divide 9000 18.7 17.3 108 18.7 18.4 102 Trial Lake 9992 13.1 16.7 78 13.0 17.9 73 ----- ----- Basin Index (%) 86 81 ----------------------------------------------------------------------------- -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.