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: MAY 21 , 2025 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7040 .0 .0 * 25.4 24.6 103 Blind Bull Sum 8880 -M 21.2 * 21.8 21.0 104 Cottonwood Creek 7710 9.5 6.7 142 34.0 30.0 113 East Rim Divide 8010 .0 .0 * 14.8 14.1 105 Grand Targhee 9260 38.9 43.4 90 37.0 38.4 96 Granite Creek 6770 .0 .0 * 22.0 22.6 97 Grassy Lake 7330 13.4 14.9 90 40.5 41.4 98 Gros Ventre Summit 8760 .6 4.6 13 16.3 15.6 104 Gunsight Pass 9830 8.5 9.6 89 17.2 17.4 99 Lewis Lake Divide 7880 14.8 21.4 69 40.7 39.3 104 Loomis Park 8240 .1 .7 14* 20.4 20.6 99 Phillips Bench 8160 14.3 18.8 76 31.9 31.2 102 Salt River Summit 7630 .0 .0 * 16.0 19.0 84 Snake River Station 6900 .2 .0 * 26.4 26.9 98 Somsen Ranch 6830 .0 .0 * 19.6 19.8 99 Spring Creek Divide 9020 22.7 20.4 111 29.1 28.0 104 Thumb Divide 7970 -M .2 * -M 22.4 * Togwotee Pass 9590 18.8 22.6 83 29.9 29.4 102 Triple Peak 8520 12.4 9.7 128 31.6 30.6 103 Two Ocean Plateau 9240 25.1 28.7 87 31.2 31.4 99 Willow Creek 8060 18.8 16.4 115 44.4 40.4 110 Younts Peak 8340 .0 6.3 0 17.7 18.8 94 ----- ----- Basin Index (%) 88 101 MADISON HEADWATERS IN WYOMING Black Bear 8160 24.6 34.0 72 40.7 43.0 95 Canyon 7870 .6 2.6 23 16.7 19.5 86 Madison Plateau 7710 9.9 13.6 73 30.1 30.7 98 West Yellowstone 6680 .0 .0 * 16.6 17.0 98 Whiskey Creek 6790 1.1 4.3 26 24.7 24.6 100 ----- ----- Basin Index (%) 66 96 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 22.7 22.1 103 25.4 25.4 100 Canyon 7870 .6 2.6 23 16.7 19.5 86 Evening Star 9040 20.1 21.9 92 34.1 34.0 100 Fisher Creek 9110 29.7 35.2 84 36.5 41.0 89 Monument Peak 8740 12.0 17.4 69 26.0 27.6 94 Northeast Entrance 7420 .2 .0 * 16.8 16.3 103 Parker Peak 9420 19.6 18.3 107 29.6 24.4 121 Sylvan Lake 8440 5.7 11.8 48 28.2 28.2 100 Thumb Divide 7970 -M .2 * -M 22.4 * Two Ocean Plateau 9240 25.1 28.7 87 31.2 31.4 99 White Mill 8730 21.5 22.8 94 26.6 27.6 96 Wolverine 7650 .0 .0 * 19.2 15.6 123 ----- ----- Basin Index (%) 87 100 WIND RIVER Burroughs Creek 8760 .0 -M * 19.3 -M * Castle Creek 8410 .0 .0 * 10.7 11.9 90 Cold Springs 9640 .0 .0 * 12.0 13.6 88 Deer Park 9690 9.4 9.6 98 23.9 24.3 98 Hobbs Park 10080 11.4 13.7 83 19.4 19.2 101 Kirwin 9580 3.1 8.0 39 18.0 17.2 105 Little Warm 9370 .0 1.8 0 16.1 15.7 103 South Pass 9040 3.8 7.6 50 21.0 20.6 102 St. Lawrence Alt 8610 .0 -M * 13.0 -M * Togwotee Pass 9590 18.8 22.6 83 29.9 29.4 102 Townsend Creek 8720 1.6 .4 400* 18.6 16.1 116 ----- ----- Basin Index (%) 76 101 BIGHORN BASIN Bald Mtn. 9360 21.2 18.4 115 22.8 20.4 112 Bear Trap Meadow 8200 .0 .0 * 12.0 12.8 94 Bone Springs Div 9340 14.3 13.8 104 16.5 19.6 84 Grave Springs 8560 .0 1.2 0 13.4 13.4 100 Kirwin 9580 3.1 8.0 39 18.0 17.2 105 Marquette 8800 5.2 3.1 168 17.3 15.6 111 Middle Powder 7760 1.7 2.8 61 13.5 14.3 94 Owl Creek 8990 .0 .0 * 11.5 9.8 117 Powder River Pass 9480 .5 5.0 10 16.1 17.4 93 Shell Creek 9570 12.5 14.2 88 17.2 17.9 96 Timber Creek 7910 .2 .0 * 13.6 12.5 109 ----- ----- Basin Index (%) 88 101 SHOSHONE RIVER Blackwater 9840 -M 22.4 * 28.4 28.2 101 Evening Star 9040 20.1 21.9 92 34.1 34.0 100 Marquette 8800 5.2 3.1 168 17.3 15.6 111 Sylvan Lake 8440 5.7 11.8 48 28.2 28.2 100 Sylvan Road 7140 .1 .0 * 17.5 19.4 90 Younts Peak 8340 .0 6.3 0 17.7 18.8 94 ----- ----- Basin Index (%) 72 99 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 12.0 12.8 94 Cloud Peak Reservoir 9830 10.1 12.0 84 19.5 20.0 98 Grave Springs 8560 .0 1.2 0 13.4 13.4 100 Hansen Sawmill 8360 .0 .0 * 12.9 13.2 98 Middle Powder 7760 1.7 2.8 61 13.5 14.3 94 Powder River Pass 9480 .5 5.0 10 16.1 17.4 93 Soldier Park 8680 .0 .1 0* 11.4 13.2 86 ----- ----- Basin Index (%) 58 95 TONGUE RIVER Big Goose 8010 2.1 3.0 70 16.7 16.4 102 Bone Springs Div 9340 14.3 13.8 104 16.5 19.6 84 Burgess Junction 7900 8.4 5.8 145 18.5 16.8 110 Dome Lake 8890 4.2 5.6 75 -M 19.8 * Little Goose 8560 5.6 5.5 102 20.0 18.0 111 Sucker Creek 8840 9.7 7.6 128 23.2 21.2 109 Tie Creek 7050 .1 .0 * 18.8 17.0 111 ----- ----- Basin Index (%) 108 104 BELLE FOURCHE Blind Park 6900 .2 .0 * 14.1 15.2 93 Cole Canyon 5930 .1 .0 * 15.3 14.0 109 North Rapid Creek 6150 -M .0 * 13.0 13.4 97 ----- ----- Basin Index (%) * 100 CHEYENNE RIVER BASIN Blind Park 6900 .2 .0 * 14.1 15.2 93 North Rapid Creek 6150 -M .0 * 13.0 13.4 97 ----- ----- Basin Index (%) * 95 UPPER N. PLATTE Arapaho Ridge 10960 14.6 19.1 76 24.2 28.4 85 Blackhall Mtn 9830 18.3 28.8 64 35.2 39.5 89 Cinnabar Park 9670 6.5 11.5 57 26.0 28.9 90 Columbine 9170 .0 .4 0* 30.5 31.2 98 Divide Peak 8700 .0 4.5 0 22.6 25.9 87 Joe Wright 10140 17.0 18.8 90 33.3 33.9 98 Laprele Creek 8370 .1 .0 * 13.0 16.8 77 Med Bow 10500 35.3 -M * 39.4 -M * Never Summer 10300 18.1 19.9 91 21.2 22.4 95 North French Creek 10150 24.3 28.3 86 35.2 36.1 98 Old Battle 9850 25.0 32.6 77 32.8 42.0 78 Rawah 9100 .0 .4 0* 16.9 20.4 83 Sage Creek Basin 7830 .0 .0 * 14.2 16.7 85 Sand Lake 10080 27.6 27.4 101 32.7 32.4 101 South Brush Creek 8480 .6 .0 * 14.8 19.0 78 Tower 10610 35.0 42.2 83 48.3 49.4 98 Webber Springs 9250 5.0 9.8 51 26.0 32.2 81 Whiskey Park 8950 12.4 21.4 58 32.2 36.0 89 Willow Creek Pass 9520 7.1 10.6 67 16.2 17.8 91 Zirkel 9320 .2 9.0 2 33.9 35.9 94 ----- ----- Basin Index (%) 74 90 SWEETWATER Deer Park 9690 9.4 9.6 98 23.9 24.3 98 Larsen Creek 8880 .0 .0 * 15.0 16.9 89 South Pass 9040 3.8 7.6 50 21.0 20.6 102 ----- ----- Basin Index (%) 77 97 LOWER N. PLATTE Casper Mtn. 7940 .1 2.4 4 15.5 19.0 82 Laprele Creek 8370 .1 .0 * 13.0 16.8 77 Reno Hill 8410 1.8 3.8 47 18.7 21.9 85 Windy Peak 7900 .2 .0 * 10.2 14.6 70 ----- ----- Basin Index (%) 35 79 LARAMIE RIVER Brooklyn Lake 10250 14.4 15.4 94 29.4 28.0 105 Cinnabar Park 9670 6.5 11.5 57 26.0 28.9 90 Crow Creek 8320 .0 .0 * 11.5 14.5 79 Deadman Hill 10240 9.5 15.8 60 22.4 24.0 93 Rawah 9100 .0 .4 0* 16.9 20.4 83 Roach 9710 .3 9.4 3 19.9 24.2 82 Windy Peak 7900 .2 .0 * 10.2 14.6 70 ----- ----- Basin Index (%) 59 88 S. PLATTE Crow Creek 8320 .0 .0 * 11.5 14.5 79 ----- ----- Basin Index (%) * 79 LITTLE SNAKE RIVER Battle Mountain 7460 .0 .0 * 17.8 19.2 93 Divide Peak 8700 .0 4.5 0 22.6 25.9 87 Elk River 8710 .0 .0 * 23.0 23.7 97 Elkhead Divide 8780 .0 -M * 21.6 -M * Little Snake River 8930 5.1 12.0 42 34.4 39.6 87 Old Battle 9850 25.0 32.6 77 32.8 42.0 78 Sage Creek Basin 7830 .0 .0 * 14.2 16.7 85 Sandstone RS 8150 .2 .0 * 16.9 21.7 78 Whiskey Park 8950 12.4 21.4 58 32.2 36.0 89 ----- ----- Basin Index (%) 61 86 UPPER GREEN RIVER Big Sandy Opening 9100 .7 1.6 44 15.5 16.4 95 Blind Bull Sum 8880 -M 21.2 * 21.8 21.0 104 East Rim Divide 8010 .0 .0 * 14.8 14.1 105 Elkhart Park G.S. 9410 .8 4.2 19 16.1 16.4 98 Gros Ventre Summit 8760 .6 4.6 13 16.3 15.6 104 Gunsight Pass 9830 8.5 9.6 89 17.2 17.4 99 Indian Creek 9400 16.9 17.8 95 26.7 24.1 111 Kendall R.S. 7790 .0 .0 * 17.2 16.2 106 Larsen Creek 8880 .0 .0 * 15.0 16.9 89 Loomis Park 8240 .1 .7 14* 20.4 20.6 99 New Fork Lake 8380 .0 .0 * -M 13.7 * Pocket Creek 9370 -M -M * -M -M * Snider Basin 8080 .0 .0 * 18.9 16.4 115 Spring Creek Divide 9020 22.7 20.4 111 29.1 28.0 104 Triple Peak 8520 12.4 9.7 128 31.6 30.6 103 ----- ----- Basin Index (%) 91 103 LOWER GREEN RIVER Blacks Fork Jct 8880 .1 .0 * 15.2 15.2 100 Buck Pasture 9620 .0 -M * 21.8 -M * EF Blacks Fork GS 9360 .1 .0 * 16.4 16.2 101 Hams Fork 7870 -M .0 * 15.8 14.2 111 Henrys Fork 10180 -M -M * 15.2 -M * Hewinta 9510 .0 .0 * 16.8 17.2 98 Hickerson Park 9130 .0 .0 * 11.7 13.4 87 Hole-in-Rock 9170 .0 .0 * 12.2 13.4 91 Indian Creek 9400 16.9 17.8 95 26.7 24.1 111 Kelley R.S. 8240 1.7 1.6 106 21.5 20.4 105 Spirit Lk 10240 .0 3.2 0 17.4 20.5 85 Steel Creek Park 10140 10.0 13.6 74 20.1 21.0 96 ----- ----- Basin Index (%) 80* 99 UPPER BEAR RIVER Bear River RS 8510 .0 .0 * 14.8 14.8 100 Bug Lake 7980 .0 3.6 0 22.1 20.4 108 Burts Miller Ranch 7900 .0 .0 * 14.2 9.5 149 Chalk Creek #1 9160 2.9 11.8 25 26.8 28.8 93 Giveout 6940 .0 .0 * 16.0 16.0 100 Hayden Fork 9160 .0 .0 * 24.0 24.8 97 Kelley R.S. 8240 1.7 1.6 106 21.5 20.4 105 Lily Lake 9130 .0 .0 * 17.2 20.5 84 Monte Cristo 8930 8.9 14.2 63 28.8 29.8 97 Salt River Summit 7630 .0 .0 * 16.0 19.0 84 Spring Creek Divide 9020 22.7 20.4 111 29.1 28.0 104 Trial Lake 9970 9.0 13.8 65 27.4 27.1 101 ----- ----- Basin Index (%) 69 100 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Median (or Average) 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 (or Average) represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1991-2020. 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 or average for the day is less than 10% of the maximum median or average value for the year. * Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians or averages 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.