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: MARCH 4 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.1 13.6 111 16.8 17.5 96 Blind Bull Sum 8650 18.6 18.3 102 12.5 16.3 77 Cottonwood Creek 7670 19.6 17.4 113 21.6 19.9 109 East Rim Divide 7930 8.2 8.5 96 8.0 9.7 82 Grand Targhee 9260 31.6 30.6 103 25.0 25.2 99 Granite Creek 6770 14.4 14.0 103 15.7 16.8 93 Grassy Lake 7265 25.6 26.6 96 27.6 30.0 92 Gros Ventre Summit 8750 7.4 10.1 73 -M 10.3 * Gunsight Pass 9820 10.2 10.8 94 9.5 11.0 86 Lewis Lake Divide 7850 23.9 25.4 94 26.3 29.4 89 Loomis Park 8240 11.4 12.0 95 12.6 14.3 88 Phillips Bench 8200 21.4 20.0 107 22.4 23.2 97 Salt River Summit 7640 10.8 10.7 101 11.7 13.7 85 Snake River Station 6920 14.0 14.4 97 17.8 18.9 94 Somsen Ranch 6800 10.8 10.8 100 12.2 13.8 88 Spring Creek Divide 9000 20.2 19.0 106 20.1 19.6 103 Thumb Divide 7980 11.8 12.4 95 12.0 15.0 80 Togwotee Pass 9580 19.8 18.3 108 21.8 19.8 110 Triple Peak 8500 20.2 17.4 116 20.8 20.6 101 Two Ocean Plateau 9240 22.1 21.8 101 12.9 22.1 58 Willow Creek 8080 23.7 22.9 103 23.7 27.3 87 Younts Peak 8350 12.8 11.8 108 13.6 12.9 105 ----- ----- Basin Index (%) 102 92 MADISON HEADWATERS IN WYOMING Black Bear 8170 25.9 30.1 86 25.7 31.6 81 Canyon 7870 11.0 10.8 102 11.9 13.3 89 Madison Plateau 7750 16.3 18.1 90 17.0 21.7 78 West Yellowstone 6700 8.8 9.1 97 10.8 11.9 91 Whiskey Creek 6800 11.4 12.2 93 14.6 16.6 88 ----- ----- Basin Index (%) 91 84 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 18.4 17.3 106 18.0 16.0 112 Canyon 7870 11.0 10.8 102 11.9 13.3 89 Evening Star 9200 24.2 19.6 123 26.3 22.5 117 Fisher Creek 9100 27.1 26.1 104 28.7 26.0 110 Monument Peak 8850 18.4 15.4 119 20.9 17.4 120 Northeast Entrance 7350 7.9 8.4 94 13.2 10.0 132 Parker Peak 9400 19.7 16.2 122 19.7 14.3 138 Sylvan Lake 8420 15.9 16.1 99 19.9 18.3 109 Thumb Divide 7980 11.8 12.4 95 12.0 15.0 80 Two Ocean Plateau 9240 22.1 21.8 101 12.9 22.1 58 White Mill 8700 22.7 18.6 122 21.7 19.3 112 Wolverine 7650 9.2 8.6 107 14.5 10.1 144 ----- ----- Basin Index (%) 109 108 WIND RIVER Burroughs Creek 8750 9.0 -M * 12.8 -M * Castle Creek 8400 4.6 -M * 6.4 -M * Cold Springs 9630 4.2 5.6 75 6.0 7.6 79 Deer Park 9700 7.7 10.9 71 10.3 15.5 66 Grave Springs 8550 4.7 7.1 66 5.4 8.0 68 Hobbs Park 10100 5.6 10.0 56 6.2 9.7 64 Kirwin 9550 7.3 7.2 101 8.6 8.9 97 Little Warm 9370 8.1 8.2 99 10.4 10.0 104 South Pass 9040 7.9 11.8 67 8.7 13.7 64 St. Lawrence Alt 8620 .7 5.4 13 2.8 6.6 42 Togwotee Pass 9580 19.8 18.3 108 21.8 19.8 110 Townsend Creek 8700 3.7 6.8 54 5.3 8.8 60 ----- ----- Basin Index (%) 76 79 BIGHORN BASIN Bald Mtn. 9380 13.9 15.2 91 12.5 13.3 94 Bear Trap Meadow 8200 5.4 4.5 120 7.0 6.3 111 Bone Springs Div 9350 12.4 12.5 99 9.6 12.0 80 Grave Springs 8550 4.7 7.1 66 5.4 8.0 68 Kirwin 9550 7.3 7.2 101 8.6 8.9 97 Marquette 8760 3.2 -M * 5.0 -M * Middle Powder 7760 7.4 8.3 89 6.9 8.9 78 Owl Creek 8975 3.8 4.0 95 3.8 4.4 86 Powder River Pass 9480 8.9 8.1 110 7.9 9.8 81 Shell Creek 9580 11.8 11.9 99 9.7 10.8 90 Timber Creek 7950 2.0 3.9 51 3.2 5.4 59 ----- ----- Basin Index (%) 94 85 SHOSHONE RIVER Blackwater 9780 17.8 17.7 101 19.4 16.4 118 Evening Star 9200 24.2 19.6 123 26.3 22.5 117 Marquette 8760 3.2 -M * 5.0 -M * Sylvan Lake 8420 15.9 16.1 99 19.9 18.3 109 Sylvan Road 7120 10.5 9.7 108 10.5 14.1 74 Younts Peak 8350 12.8 11.8 108 13.6 12.9 105 ----- ----- Basin Index (%) 108 107 POWDER RIVER Bear Trap Meadow 8200 5.4 4.5 120 7.0 6.3 111 Cloud Peak Reservoir 9860 10.4 10.6 98 10.7 9.8 109 Grave Springs 8550 4.7 7.1 66 5.4 8.0 68 Hansen Sawmill 8360 5.4 4.7 115 6.2 6.2 100 Middle Powder 7760 7.4 8.3 89 6.9 8.9 78 Powder River Pass 9480 8.9 8.1 110 7.9 9.8 81 Soldier Park 8720 3.8 -M * 7.0 -M * ----- ----- Basin Index (%) 97 90 TONGUE RIVER Big Goose 7990 6.2 6.3 98 9.0 8.0 112 Bone Springs Div 9350 12.4 12.5 99 9.6 12.0 80 Burgess Junction 7880 8.0 8.6 93 10.4 9.2 113 Dome Lake 8880 9.6 8.8 109 10.0 10.1 99 Little Goose 8870 8.1 -M * 10.1 -M * Sucker Creek 8880 10.3 9.2 112 13.3 10.8 123 Tie Creek 6870 3.6 4.4 82 7.8 8.6 91 ----- ----- Basin Index (%) 101 102 BELLE FOURCHE Blind Park 6890 4.6 6.4 72 7.1 9.6 74 Cole Canyon 5910 3.6 4.9 73 6.0 7.2 83 North Rapid Creek 6130 5.0 6.0 83 6.5 7.7 84 ----- ----- Basin Index (%) 76 80 CHEYENNE RIVER BASIN Blind Park 6890 4.6 6.4 72 7.1 9.6 74 North Rapid Creek 6130 5.0 6.0 83 6.5 7.7 84 ----- ----- Basin Index (%) 77 79 UPPER N. PLATTE Arapaho Ridge 10960 17.0 17.0 100 16.7 18.0 93 Blackhall Mtn 9820 23.4 -M * 23.5 -M * Cinnabar Park 9574 14.7 17.4 84 16.4 19.8 83 Columbine 9160 19.1 20.2 95 17.2 20.6 83 Divide Peak 8880 12.6 16.3 77 14.3 17.0 84 Joe Wright 10120 14.6 17.1 85 17.6 20.2 87 Laprele Creek 8375 6.4 7.8 82 7.5 9.5 79 Med Bow 10500 32.6 -M * 27.6 -M * Never Summer 10280 14.3 16.3 88 10.3 -M * North French Creek 10130 23.6 21.3 111 23.3 21.3 109 Old Battle 10000 23.9 24.3 98 25.3 28.3 89 Rawah 9020 8.3 8.9 93 9.9 11.1 89 Sage Creek Basin 7850 12.7 10.7 119 8.6 11.9 72 Sand Lake 10050 22.8 21.4 107 20.7 19.1 108 South Brush Creek 8440 8.6 10.6 81 8.7 11.9 73 Tower 10500 29.7 36.9 80 27.8 32.4 86 Webber Springs 9250 16.9 19.0 89 17.6 21.4 82 Whiskey Park 8950 24.5 22.0 111 22.4 22.7 99 Willow Creek Pass 9540 9.2 9.7 95 8.2 10.5 78 Zirkel 9340 19.0 23.6 81 22.1 23.6 94 ----- ----- Basin Index (%) 93 89 SWEETWATER Deer Park 9700 7.7 10.9 71 10.3 15.5 66 Larsen Creek 9000 6.2 9.8 63 7.0 -M * South Pass 9040 7.9 11.8 67 8.7 13.7 64 ----- ----- Basin Index (%) 67 65 LOWER N. PLATTE Casper Mtn. 7900 6.4 10.6 60 6.6 11.3 58 Laprele Creek 8375 6.4 7.8 82 7.5 9.5 79 Reno Hill 8400 8.1 10.5 77 9.2 11.3 81 Windy Peak 7900 4.7 5.9 80 6.3 7.9 80 ----- ----- Basin Index (%) 74 74 LARAMIE RIVER Brooklyn Lake 10240 19.4 15.5 125 20.8 16.3 128 Cinnabar Park 9574 14.7 17.4 84 16.4 19.8 83 Crow Creek 8330 2.2 6.8 32 6.0 7.9 76 Deadman Hill 10220 13.2 12.6 105 12.3 13.0 95 Rawah 9020 8.3 8.9 93 9.9 11.1 89 Roach 9700 11.0 12.6 87 12.2 14.9 82 Windy Peak 7900 4.7 5.9 80 6.3 7.9 80 ----- ----- Basin Index (%) 92 92 S. PLATTE Crow Creek 8330 2.2 6.8 32 6.0 7.9 76 ----- ----- Basin Index (%) 32 76 LITTLE SNAKE RIVER Battle Mountain 7440 7.9 10.0 79 10.7 12.3 87 Divide Peak 8880 12.6 16.3 77 14.3 17.0 84 Elk River 8700 13.5 16.0 84 10.5 16.2 65 Elkhead Divide 8780 12.9 -M * 13.7 -M * Little Snake River 8915 20.2 19.9 102 25.0 25.2 99 Old Battle 10000 23.9 24.3 98 25.3 28.3 89 Sage Creek Basin 7850 12.7 10.7 119 8.6 11.9 72 Sandstone RS 8150 11.0 10.9 101 12.1 15.3 79 Whiskey Park 8950 24.5 22.0 111 22.4 22.7 99 ----- ----- Basin Index (%) 97 87 UPPER GREEN RIVER Big Sandy Opening 9080 8.0 10.3 78 7.6 10.7 71 Blind Bull Sum 8650 18.6 18.3 102 12.5 16.3 77 East Rim Divide 7930 8.2 8.5 96 8.0 9.7 82 Elkhart Park G.S. 9400 8.4 9.6 88 7.0 10.7 65 Gros Ventre Summit 8750 7.4 10.1 73 -M 10.3 * Gunsight Pass 9820 10.2 10.8 94 9.5 11.0 86 Indian Creek 9425 17.0 19.2 89 14.9 18.2 82 Kendall R.S. 7740 10.5 9.9 106 11.5 11.9 97 Larsen Creek 9000 6.2 9.8 63 7.0 -M * Loomis Park 8240 11.4 12.0 95 12.6 14.3 88 New Fork Lake 8340 8.0 8.4 95 8.6 8.9 97 Pocket Creek 9360 -M -M * 6.4 -M * Snider Basin 8060 10.4 10.0 104 11.9 11.7 102 Spring Creek Divide 9000 20.2 19.0 106 20.1 19.6 103 Triple Peak 8500 20.2 17.4 116 20.8 20.6 101 ----- ----- Basin Index (%) 95 89 LOWER GREEN RIVER Blacks Fork Jct 8869 5.3 -M * 7.7 -M * Buck Pasture 9632 10.3 -M * 11.1 -M * EF Blacks Fork GS 9360 9.6 -M * 8.2 -M * Hams Fork 7840 10.2 9.5 107 9.0 9.3 97 Henrys Fork 10182 -M -M * 8.2 -M * Hewinta 9500 7.5 8.1 93 10.0 11.0 91 Hickerson Park 9122 4.8 6.1 79 5.7 7.7 74 Hole-in-Rock 9168 4.4 5.7 77 6.4 7.2 89 Indian Creek 9425 17.0 19.2 89 14.9 18.2 82 Kelley R.S. 8180 11.9 12.2 98 12.8 14.8 86 Spirit Lk 10235 8.0 -M * 9.0 -M * Steel Creek Park 10158 10.2 11.8 86 12.3 12.6 98 ----- ----- Basin Index (%) 91 88 UPPER BEAR RIVER Bear River RS 8777 6.3 -M * 8.3 -M * Bug Lake 7987 13.6 15.2 89 12.5 15.8 79 Burts Miller Ranch 8000 4.0 -M * 6.1 -M * Chalk Creek #1 9171 -M 18.7 * -M 19.9 * Dry Bread Pond 8302 12.6 15.6 81 12.6 15.9 79 Giveout 6930 7.5 8.6 87 9.5 10.5 90 Hayden Fork 9130 10.0 12.4 81 13.9 16.7 83 Kelley R.S. 8180 11.9 12.2 98 12.8 14.8 86 Lily Lake 9133 8.4 10.6 79 9.1 13.5 67 Monte Cristo 8932 16.8 21.7 77 16.0 20.9 77 Salt River Summit 7640 10.8 10.7 101 11.7 13.7 85 Spring Creek Divide 9000 20.2 19.0 106 20.1 19.6 103 Trial Lake 9992 13.9 18.2 76 13.5 19.3 70 ----- ----- Basin Index (%) 87 82 ----------------------------------------------------------------------------- -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.