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 11 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.5 13.8 112 17.2 18.3 94 Blind Bull Sum 8650 18.6 19.4 96 12.5 16.9 74 Cottonwood Creek 7670 19.4 18.5 105 21.8 20.7 105 East Rim Divide 7930 8.2 9.4 87 7.9 10.2 77 Grand Targhee 9260 32.1 31.9 101 25.3 25.7 98 Granite Creek 6770 14.4 14.6 99 15.6 17.5 89 Grassy Lake 7265 25.9 27.6 94 28.1 31.2 90 Gros Ventre Summit 8750 7.5 10.9 69 9.3 10.9 85 Gunsight Pass 9820 10.3 11.6 89 9.6 11.6 83 Lewis Lake Divide 7850 24.3 26.5 92 26.6 30.8 86 Loomis Park 8240 11.5 12.7 91 12.7 14.9 85 Phillips Bench 8200 21.5 21.2 101 22.5 24.2 93 Salt River Summit 7640 10.8 11.2 96 11.7 14.2 82 Snake River Station 6920 14.1 15.2 93 17.9 19.6 91 Somsen Ranch 6800 10.6 11.6 91 12.2 14.3 85 Spring Creek Divide 9000 20.0 19.6 102 20.1 20.4 99 Thumb Divide 7980 12.0 13.2 91 12.0 15.8 76 Togwotee Pass 9580 20.4 19.5 105 22.4 20.7 108 Triple Peak 8500 20.2 18.6 109 20.9 21.6 97 Two Ocean Plateau 9240 22.8 23.1 99 13.2 23.3 57 Willow Creek 8080 24.3 24.1 101 24.1 28.5 85 Younts Peak 8350 13.0 12.4 105 13.6 13.4 101 ----- ----- Basin Index (%) 98 89 MADISON HEADWATERS IN WYOMING Black Bear 8170 27.1 31.5 86 26.8 33.1 81 Canyon 7870 11.2 11.5 97 12.0 14.0 86 Madison Plateau 7750 17.0 19.3 88 17.7 22.8 78 West Yellowstone 6700 9.3 9.7 96 11.3 12.4 91 Whiskey Creek 6800 11.9 13.2 90 15.1 17.4 87 ----- ----- Basin Index (%) 90 83 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 19.1 18.4 104 18.5 16.8 110 Canyon 7870 11.2 11.5 97 12.0 14.0 86 Evening Star 9200 24.7 20.9 118 26.6 23.4 114 Fisher Creek 9100 27.9 27.0 103 29.5 27.2 108 Monument Peak 8850 18.7 15.9 118 21.2 18.2 116 Northeast Entrance 7350 8.1 8.6 94 13.6 10.5 130 Parker Peak 9400 20.2 16.7 121 20.3 15.0 135 Sylvan Lake 8420 16.2 17.0 95 20.2 19.0 106 Thumb Divide 7980 12.0 13.2 91 12.0 15.8 76 Two Ocean Plateau 9240 22.8 23.1 99 13.2 23.3 57 White Mill 8700 23.2 19.2 121 22.2 20.3 109 Wolverine 7650 9.4 9.0 104 14.6 10.5 139 ----- ----- Basin Index (%) 106 105 WIND RIVER Burroughs Creek 8750 10.5 -M * 13.1 -M * Castle Creek 8400 5.1 -M * 7.0 -M * Cold Springs 9630 4.5 5.9 76 6.3 8.0 79 Deer Park 9700 8.3 12.1 69 10.8 16.3 66 Hobbs Park 10100 6.1 11.0 55 6.7 10.4 64 Kirwin 9550 7.6 7.8 97 8.6 9.4 91 Little Warm 9370 8.5 8.7 98 10.7 10.5 102 South Pass 9040 8.3 12.5 66 9.0 14.5 62 St. Lawrence Alt 8620 .5 5.9 8 3.5 7.0 50 Togwotee Pass 9580 20.4 19.5 105 22.4 20.7 108 Townsend Creek 8700 4.3 7.4 58 6.0 9.4 64 ----- ----- Basin Index (%) 75 79 BIGHORN BASIN Bald Mtn. 9380 13.9 16.0 87 12.3 13.9 88 Bear Trap Meadow 8200 5.8 4.7 123 7.5 6.6 114 Bone Springs Div 9350 12.4 13.3 93 9.6 12.6 76 Grave Springs 8550 5.3 7.5 71 6.1 8.3 73 Kirwin 9550 7.6 7.8 97 8.6 9.4 91 Marquette 8760 3.5 -M * 5.3 -M * Middle Powder 7760 8.0 8.8 91 7.4 9.3 80 Owl Creek 8975 4.2 4.3 98 4.2 4.6 91 Powder River Pass 9480 9.2 8.5 108 8.1 10.2 79 Shell Creek 9580 12.1 12.3 98 9.8 11.2 88 Timber Creek 7950 2.6 4.1 63 3.8 5.6 68 ----- ----- Basin Index (%) 93 84 SHOSHONE RIVER Blackwater 9780 18.5 19.1 97 19.6 17.2 114 Evening Star 9200 24.7 20.9 118 26.6 23.4 114 Marquette 8760 3.5 -M * 5.3 -M * Sylvan Lake 8420 16.2 17.0 95 20.2 19.0 106 Sylvan Road 7120 10.7 10.0 107 -M 14.6 * Younts Peak 8350 13.0 12.4 105 13.6 13.4 101 ----- ----- Basin Index (%) 105 110 POWDER RIVER Bear Trap Meadow 8200 5.8 4.7 123 7.5 6.6 114 Cloud Peak Reservoir 9860 10.8 11.8 92 11.0 10.3 107 Grave Springs 8550 5.3 7.5 71 6.1 8.3 73 Hansen Sawmill 8360 5.9 5.2 113 6.5 6.5 100 Middle Powder 7760 8.0 8.8 91 7.4 9.3 80 Powder River Pass 9480 9.2 8.5 108 8.1 10.2 79 Soldier Park 8720 4.1 -M * 7.4 -M * ----- ----- Basin Index (%) 97 91 TONGUE RIVER Big Goose 7990 6.5 6.9 94 9.3 8.4 111 Bone Springs Div 9350 12.4 13.3 93 9.6 12.6 76 Burgess Junction 7880 8.0 9.3 86 10.3 9.7 106 Dome Lake 8880 10.0 9.4 106 10.3 10.6 97 Little Goose 8870 8.5 -M * 10.4 -M * Sucker Creek 8880 10.4 10.1 103 13.3 11.4 117 Tie Creek 6870 3.5 4.7 74 7.7 9.0 86 ----- ----- Basin Index (%) 95 98 BELLE FOURCHE Blind Park 6890 4.3 6.8 63 7.2 10.0 72 Cole Canyon 5910 3.5 5.1 69 5.9 7.4 80 North Rapid Creek 6130 5.0 6.3 79 6.5 8.1 80 ----- ----- Basin Index (%) 70 77 CHEYENNE RIVER BASIN Blind Park 6890 4.3 6.8 63 7.2 10.0 72 North Rapid Creek 6130 5.0 6.3 79 6.5 8.1 80 ----- ----- Basin Index (%) 71 76 UPPER N. PLATTE Arapaho Ridge 10960 17.7 17.7 100 17.4 18.8 93 Blackhall Mtn 9820 23.9 -M * 24.0 -M * Cinnabar Park 9574 14.9 17.8 84 16.8 20.6 82 Columbine 9160 20.0 21.1 95 17.5 21.8 80 Divide Peak 8880 13.4 17.0 79 15.0 18.0 83 Joe Wright 10120 15.0 18.4 82 18.2 21.4 85 Laprele Creek 8375 6.7 8.5 79 7.9 10.1 78 Med Bow 10500 33.5 -M * 28.2 -M * Never Summer 10280 15.1 17.0 89 10.6 -M * North French Creek 10130 24.1 23.0 105 23.8 22.5 106 Old Battle 10000 24.6 25.6 96 26.2 29.8 88 Rawah 9020 8.6 9.3 92 10.3 11.5 90 Sage Creek Basin 7850 13.2 11.6 114 9.2 12.4 74 Sand Lake 10050 23.3 22.6 103 21.1 20.4 103 South Brush Creek 8440 8.8 11.1 79 8.8 12.6 70 Tower 10500 30.6 38.2 80 28.6 33.9 84 Webber Springs 9250 17.4 20.2 86 18.3 22.6 81 Whiskey Park 8950 25.3 23.3 109 23.2 23.9 97 Willow Creek Pass 9540 9.7 10.3 94 8.6 11.0 78 Zirkel 9340 19.8 25.2 79 22.9 24.6 93 ----- ----- Basin Index (%) 91 87 SWEETWATER Deer Park 9700 8.3 12.1 69 10.8 16.3 66 Larsen Creek 9000 6.5 10.4 62 7.4 -M * South Pass 9040 8.3 12.5 66 9.0 14.5 62 ----- ----- Basin Index (%) 66 64 LOWER N. PLATTE Casper Mtn. 7900 7.3 11.5 63 7.3 11.9 61 Laprele Creek 8375 6.7 8.5 79 7.9 10.1 78 Reno Hill 8400 8.8 11.2 79 9.9 12.0 82 Windy Peak 7900 5.0 6.6 76 6.7 8.5 79 ----- ----- Basin Index (%) 74 75 LARAMIE RIVER Brooklyn Lake 10240 20.1 16.8 120 21.4 17.4 123 Cinnabar Park 9574 14.9 17.8 84 16.8 20.6 82 Crow Creek 8330 2.3 7.1 32 6.2 8.4 74 Deadman Hill 10220 13.6 13.0 105 12.7 14.0 91 Rawah 9020 8.6 9.3 92 10.3 11.5 90 Roach 9700 11.4 13.4 85 12.8 15.9 81 Windy Peak 7900 5.0 6.6 76 6.7 8.5 79 ----- ----- Basin Index (%) 90 90 S. PLATTE Crow Creek 8330 2.3 7.1 32 6.2 8.4 74 ----- ----- Basin Index (%) 32 74 LITTLE SNAKE RIVER Battle Mountain 7440 8.2 10.6 77 11.4 12.9 88 Divide Peak 8880 13.4 17.0 79 15.0 18.0 83 Elk River 8700 14.5 16.9 86 10.9 17.1 64 Elkhead Divide 8780 13.9 -M * 14.8 -M * Little Snake River 8915 20.4 20.3 100 25.7 25.8 100 Old Battle 10000 24.6 25.6 96 26.2 29.8 88 Sage Creek Basin 7850 13.2 11.6 114 9.2 12.4 74 Sandstone RS 8150 11.6 11.8 98 12.7 16.0 79 Whiskey Park 8950 25.3 23.3 109 23.2 23.9 97 ----- ----- Basin Index (%) 96 86 UPPER GREEN RIVER Big Sandy Opening 9080 8.6 10.8 80 8.1 11.2 72 Blind Bull Sum 8650 18.6 19.4 96 12.5 16.9 74 East Rim Divide 7930 8.2 9.4 87 7.9 10.2 77 Elkhart Park G.S. 9400 8.4 10.1 83 7.3 11.1 66 Gros Ventre Summit 8750 7.5 10.9 69 9.3 10.9 85 Gunsight Pass 9820 10.3 11.6 89 9.6 11.6 83 Indian Creek 9425 16.9 20.3 83 14.9 19.0 78 Kendall R.S. 7740 10.7 10.5 102 11.7 12.5 94 Larsen Creek 9000 6.5 10.4 62 7.4 -M * Loomis Park 8240 11.5 12.7 91 12.7 14.9 85 New Fork Lake 8340 8.2 9.0 91 8.7 9.3 94 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 10.3 10.6 97 11.8 12.2 97 Spring Creek Divide 9000 20.0 19.6 102 20.1 20.4 99 Triple Peak 8500 20.2 18.6 109 20.9 21.6 97 ----- ----- Basin Index (%) 90 86 LOWER GREEN RIVER Blacks Fork Jct 8869 5.8 -M * 8.2 -M * Buck Pasture 9632 10.7 -M * 11.6 -M * EF Blacks Fork GS 9360 10.1 -M * 8.7 -M * Hams Fork 7840 10.2 10.0 102 9.0 9.6 94 Henrys Fork 10182 -M -M * 8.9 -M * Hewinta 9500 8.3 8.6 97 10.6 11.5 92 Hickerson Park 9122 5.2 6.4 81 6.2 8.1 77 Hole-in-Rock 9168 4.8 6.1 79 6.8 7.6 89 Indian Creek 9425 16.9 20.3 83 14.9 19.0 78 Kelley R.S. 8180 11.5 12.7 91 12.7 15.4 82 Spirit Lk 10235 8.5 -M * 9.5 -M * Steel Creek Park 10158 11.7 12.6 93 13.0 13.3 98 ----- ----- Basin Index (%) 89 87 UPPER BEAR RIVER Bear River RS 8777 6.6 -M * 8.8 -M * Bug Lake 7987 13.7 16.1 85 12.7 16.4 77 Burts Miller Ranch 8000 4.5 -M * 6.4 -M * Chalk Creek #1 9171 12.4 20.0 62 13.8 20.8 66 Dry Bread Pond 8302 12.8 16.5 78 12.9 16.5 78 Giveout 6930 7.4 8.9 83 9.3 10.9 85 Hayden Fork 9130 10.2 13.4 76 14.5 17.4 83 Kelley R.S. 8180 11.5 12.7 91 12.7 15.4 82 Lily Lake 9133 8.9 11.1 80 9.7 14.1 69 Monte Cristo 8932 16.9 22.9 74 16.3 21.8 75 Salt River Summit 7640 10.8 11.2 96 11.7 14.2 82 Spring Creek Divide 9000 20.0 19.6 102 20.1 20.4 99 Trial Lake 9992 14.3 19.2 74 13.9 20.1 69 ----- ----- Basin Index (%) 81 79 ----------------------------------------------------------------------------- -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.