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 SATURDAY: APRIL 3 , 2021 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.0 15.0 107 17.8 20.4 87 Blind Bull Sum 8650 19.9 22.8 87 13.1 19.0 69 Cottonwood Creek 7670 20.0 21.3 94 23.0 24.0 96 East Rim Divide 7930 8.4 10.1 83 8.3 11.4 73 Grand Targhee 9260 35.2 37.2 95 27.8 30.0 93 Granite Creek 6770 15.4 14.8 104 -M 19.2 * Grassy Lake 7265 28.3 31.6 90 30.5 35.0 87 Gros Ventre Summit 8750 9.4 13.0 72 9.9 12.5 79 Gunsight Pass 9820 11.0 13.5 81 10.7 13.4 80 Lewis Lake Divide 7850 23.9 29.6 81 28.7 34.5 83 Loomis Park 8240 11.7 14.1 83 13.2 16.8 79 Phillips Bench 8200 22.3 24.6 91 23.4 27.4 85 Salt River Summit 7640 11.0 13.0 85 12.5 16.2 77 Snake River Station 6920 15.4 15.2 101 19.2 21.8 88 Somsen Ranch 6800 10.2 11.6 88 13.3 16.1 83 Spring Creek Divide 9000 21.2 22.5 94 21.5 23.2 93 Thumb Divide 7980 12.9 14.8 87 13.4 18.0 74 Togwotee Pass 9580 20.9 21.7 96 23.9 23.6 101 Triple Peak 8500 21.2 21.9 97 22.0 24.7 89 Two Ocean Plateau 9240 24.2 25.7 94 14.3 26.4 54 Willow Creek 8080 24.5 28.1 87 25.6 32.7 78 Younts Peak 8350 14.3 14.2 101 15.1 15.3 99 ----- ----- Basin Index (%) 91 84 MADISON HEADWATERS IN WYOMING Black Bear 8170 -M 36.8 * 29.8 37.0 81 Canyon 7870 12.2 12.4 98 13.8 15.7 88 Madison Plateau 7750 19.6 21.4 92 19.9 25.5 78 West Yellowstone 6700 10.4 10.2 102 12.7 13.8 92 Whiskey Creek 6800 13.6 15.0 91 17.0 19.5 87 ----- ----- Basin Index (%) 95 84 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 20.3 21.2 96 20.0 19.1 105 Canyon 7870 12.2 12.4 98 13.8 15.7 88 Evening Star 9200 26.0 23.8 109 28.4 26.4 108 Fisher Creek 9100 29.4 30.6 96 31.6 30.7 103 Monument Peak 8850 20.9 19.2 109 23.6 20.9 113 Northeast Entrance 7350 -M 9.4 * -M 11.8 * Parker Peak 9400 23.7 18.9 125 22.9 17.0 135 Sylvan Lake 8420 17.6 19.2 92 21.9 21.6 101 Thumb Divide 7980 12.9 14.8 87 13.4 18.0 74 Two Ocean Plateau 9240 24.2 25.7 94 14.3 26.4 54 White Mill 8700 24.8 21.8 114 23.7 22.9 103 Wolverine 7650 9.6 9.3 103 15.4 11.8 131 ----- ----- Basin Index (%) 102 99 WIND RIVER Burroughs Creek 8750 10.0 -M * 14.1 -M * Castle Creek 8400 5.2 -M * 7.4 -M * Cold Springs 9630 6.4 7.1 90 9.0 9.7 93 Deer Park 9700 12.0 14.9 81 15.0 19.1 79 Hobbs Park 10100 11.8 13.6 87 12.4 12.8 97 Kirwin 9550 9.0 9.5 95 10.6 11.2 95 Little Warm 9370 9.5 10.2 93 12.2 12.4 98 South Pass 9040 11.8 15.0 79 13.1 16.9 78 St. Lawrence Alt 8620 3.1 6.8 46 5.8 8.7 67 Togwotee Pass 9580 20.9 21.7 96 23.9 23.6 101 Townsend Creek 8700 9.0 9.2 98 11.1 11.5 97 ----- ----- Basin Index (%) 87 90 BIGHORN BASIN Bald Mtn. 9380 16.4 18.9 87 15.3 16.5 93 Bear Trap Meadow 8200 8.9 5.1 175 10.5 8.2 128 Bone Springs Div 9350 15.5 16.3 95 11.8 15.0 79 Grave Springs 8550 7.4 9.0 82 8.5 10.1 84 Kirwin 9550 9.0 9.5 95 10.6 11.2 95 Marquette 8760 4.9 -M * 6.9 -M * Middle Powder 7760 11.4 11.6 98 9.8 11.3 87 Owl Creek 8975 5.4 5.7 95 5.9 5.8 102 Powder River Pass 9480 11.2 10.0 112 10.7 12.1 88 Shell Creek 9580 -M 14.7 * -M 13.3 * Timber Creek 7950 3.3 4.8 69 5.0 7.1 70 ----- ----- Basin Index (%) 97 91 SHOSHONE RIVER Blackwater 9780 19.8 22.3 89 21.9 19.9 110 Evening Star 9200 26.0 23.8 109 28.4 26.4 108 Marquette 8760 4.9 -M * 6.9 -M * Sylvan Lake 8420 17.6 19.2 92 21.9 21.6 101 Sylvan Road 7120 9.1 11.0 83 -M 16.3 * Younts Peak 8350 14.3 14.2 101 15.1 15.3 99 ----- ----- Basin Index (%) 96 105 POWDER RIVER Bear Trap Meadow 8200 8.9 5.1 175 10.5 8.2 128 Cloud Peak Reservoir 9860 15.5 14.3 108 15.6 12.8 122 Grave Springs 8550 7.4 9.0 82 8.5 10.1 84 Hansen Sawmill 8360 9.2 6.3 146 10.3 8.2 126 Middle Powder 7760 11.4 11.6 98 9.8 11.3 87 Powder River Pass 9480 11.2 10.0 112 10.7 12.1 88 Soldier Park 8720 7.5 -M * 10.8 -M * ----- ----- Basin Index (%) 113 104 TONGUE RIVER Big Goose 7990 9.3 9.2 101 11.9 10.9 109 Bone Springs Div 9350 15.5 16.3 95 11.8 15.0 79 Burgess Junction 7880 10.7 11.5 93 13.1 11.9 110 Dome Lake 8880 12.9 11.6 111 13.4 13.1 102 Little Goose 8870 12.1 -M * 13.9 -M * Sucker Creek 8880 13.4 11.6 116 17.0 13.9 122 Tie Creek 6870 5.4 5.5 98 10.5 11.1 95 ----- ----- Basin Index (%) 102 102 BELLE FOURCHE Blind Park 6890 3.2 7.2 44 8.3 11.4 73 Cole Canyon 5910 3.4 5.7 60 6.7 9.0 74 North Rapid Creek 6130 5.4 6.7 81 7.8 9.4 83 ----- ----- Basin Index (%) 61 77 CHEYENNE RIVER BASIN Blind Park 6890 3.2 7.2 44 8.3 11.4 73 North Rapid Creek 6130 5.4 6.7 81 7.8 9.4 83 ----- ----- Basin Index (%) 62 77 UPPER N. PLATTE Arapaho Ridge 10960 20.5 20.2 101 20.3 21.5 94 Blackhall Mtn 9820 27.8 -M * 27.1 -M * Cinnabar Park 9574 18.4 20.4 90 20.7 23.3 89 Columbine 9160 21.6 23.2 93 19.8 24.8 80 Divide Peak 8880 16.3 19.6 83 17.5 20.8 84 Joe Wright 10120 19.4 20.5 95 22.5 25.0 90 Laprele Creek 8375 10.6 9.4 113 12.4 12.1 102 Med Bow 10500 37.6 -M * 31.4 -M * Never Summer 10280 17.4 19.9 87 13.0 -M * North French Creek 10130 27.6 28.5 97 27.5 26.0 106 Old Battle 10000 28.2 30.3 93 29.5 34.1 87 Rawah 9020 11.0 10.4 106 13.4 13.7 98 Sage Creek Basin 7850 17.1 12.6 136 10.0 14.1 71 Sand Lake 10050 28.9 28.1 103 26.4 24.0 110 South Brush Creek 8440 9.2 12.2 75 10.3 14.8 70 Tower 10500 34.2 44.8 76 32.8 38.6 85 Webber Springs 9250 19.5 23.0 85 21.2 26.0 82 Whiskey Park 8950 28.2 26.5 106 25.9 27.2 95 Willow Creek Pass 9540 11.4 11.9 96 10.2 13.0 78 Zirkel 9340 22.0 26.3 84 25.4 27.6 92 ----- ----- Basin Index (%) 93 89 SWEETWATER Deer Park 9700 12.0 14.9 81 15.0 19.1 79 Larsen Creek 9000 6.9 12.0 58 8.9 -M * South Pass 9040 11.8 15.0 79 13.1 16.9 78 ----- ----- Basin Index (%) 73 78 LOWER N. PLATTE Casper Mtn. 7900 13.1 13.8 95 11.2 14.3 78 Laprele Creek 8375 10.6 9.4 113 12.4 12.1 102 Reno Hill 8400 15.0 13.6 110 15.8 14.8 107 Windy Peak 7900 11.8 7.8 151 13.0 10.2 127 ----- ----- Basin Index (%) 113 102 LARAMIE RIVER Brooklyn Lake 10240 24.4 20.7 118 25.6 20.4 125 Cinnabar Park 9574 18.4 20.4 90 20.7 23.3 89 Crow Creek 8330 5.1 7.0 73 10.0 10.4 96 Deadman Hill 10220 19.0 15.8 120 17.4 16.7 104 Rawah 9020 11.0 10.4 106 13.4 13.7 98 Roach 9700 15.4 16.0 96 17.2 18.6 92 Windy Peak 7900 11.8 7.8 151 13.0 10.2 127 ----- ----- Basin Index (%) 107 104 S. PLATTE Crow Creek 8330 5.1 7.0 73 10.0 10.4 96 ----- ----- Basin Index (%) 73 96 LITTLE SNAKE RIVER Battle Mountain 7440 7.9 10.4 76 12.4 14.6 85 Divide Peak 8880 16.3 19.6 83 17.5 20.8 84 Elk River 8700 15.7 18.9 83 12.8 19.5 66 Elkhead Divide 8780 15.4 -M * 16.7 -M * Little Snake River 8915 22.5 23.8 95 28.5 28.9 99 Old Battle 10000 28.2 30.3 93 29.5 34.1 87 Sage Creek Basin 7850 17.1 12.6 136 10.0 14.1 71 Sandstone RS 8150 11.4 13.0 88 13.7 17.9 77 Whiskey Park 8950 28.2 26.5 106 25.9 27.2 95 ----- ----- Basin Index (%) 95 85 UPPER GREEN RIVER Big Sandy Opening 9080 9.7 12.4 78 8.5 12.8 66 Blind Bull Sum 8650 19.9 22.8 87 13.1 19.0 69 East Rim Divide 7930 8.4 10.1 83 8.3 11.4 73 Elkhart Park G.S. 9400 9.3 12.2 76 8.1 12.9 63 Gros Ventre Summit 8750 9.4 13.0 72 9.9 12.5 79 Gunsight Pass 9820 11.0 13.5 81 10.7 13.4 80 Indian Creek 9425 18.7 24.2 77 17.0 22.0 77 Kendall R.S. 7740 10.9 11.5 95 12.3 13.8 89 Larsen Creek 9000 6.9 12.0 58 8.9 -M * Loomis Park 8240 11.7 14.1 83 13.2 16.8 79 New Fork Lake 8340 8.4 10.3 82 9.5 10.5 90 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 10.7 12.3 87 12.6 13.9 91 Spring Creek Divide 9000 21.2 22.5 94 21.5 23.2 93 Triple Peak 8500 21.2 21.9 97 22.0 24.7 89 ----- ----- Basin Index (%) 83 81 LOWER GREEN RIVER Blacks Fork Jct 8869 7.7 -M * 10.0 -M * Buck Pasture 9632 13.0 -M * 13.8 -M * EF Blacks Fork GS 9360 12.4 -M * 11.0 -M * Hams Fork 7840 9.9 10.9 91 9.8 11.1 88 Henrys Fork 10182 -M -M * 11.9 -M * Hewinta 9500 12.3 10.9 113 12.9 13.6 95 Hickerson Park 9122 9.6 7.7 125 10.7 9.9 108 Hole-in-Rock 9168 8.2 7.0 117 10.9 9.4 116 Indian Creek 9425 18.7 24.2 77 17.0 22.0 77 Kelley R.S. 8180 12.2 15.0 81 13.7 17.6 78 Spirit Lk 10235 13.0 -M * 14.3 -M * Steel Creek Park 10158 14.9 15.5 96 16.2 16.0 101 ----- ----- Basin Index (%) 94 92 UPPER BEAR RIVER Bear River RS 8777 7.8 -M * 10.6 -M * Bug Lake 7987 14.0 18.2 77 13.8 18.9 73 Burts Miller Ranch 8000 6.4 -M * 7.5 -M * Chalk Creek #1 9171 15.8 23.8 66 16.7 24.5 68 Dry Bread Pond 8302 13.4 18.2 74 14.3 19.0 75 Giveout 6930 6.4 8.5 75 9.5 12.2 78 Hayden Fork 9130 12.3 15.3 80 17.4 20.5 85 Kelley R.S. 8180 12.2 15.0 81 13.7 17.6 78 Lily Lake 9133 10.8 12.3 88 11.6 16.6 70 Monte Cristo 8932 18.5 26.9 69 18.1 25.3 72 Salt River Summit 7640 11.0 13.0 85 12.5 16.2 77 Spring Creek Divide 9000 21.2 22.5 94 21.5 23.2 93 Trial Lake 9992 17.4 21.5 81 16.1 23.4 69 ----- ----- Basin Index (%) 78 76 ----------------------------------------------------------------------------- -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.