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 TUESDAY: MAY 20 , 2025
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
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WYOMING
SNAKE RIVER
Base Camp 7040 .0 .0 * 24.9 24.6 101
Blind Bull Sum 8880 -M 21.2 * 21.7 21.0 103
Cottonwood Creek 7710 9.5 7.9 120 34.0 30.0 113
East Rim Divide 8010 .0 .0 * 14.6 14.0 104
Grand Targhee 9260 38.7 43.4 89 36.8 38.4 96
Granite Creek 6770 .0 .0 * 21.9 22.6 97
Grassy Lake 7330 13.2 15.5 85 39.9 41.4 96
Gros Ventre Summit 8760 1.0 5.4 19 16.2 15.6 104
Gunsight Pass 9830 8.2 10.0 82 17.2 17.4 99
Lewis Lake Divide 7880 14.4 21.9 66 40.0 39.3 102
Loomis Park 8240 .1 1.6 6 20.3 20.6 99
Phillips Bench 8160 14.3 19.4 74 31.7 31.2 102
Salt River Summit 7630 .0 .0 * 15.9 19.0 84
Snake River Station 6900 .0 .0 * 25.6 26.8 96
Somsen Ranch 6830 .0 .0 * 19.5 19.8 98
Spring Creek Divide 9020 22.8 20.8 110 28.9 28.0 103
Thumb Divide 7970 -M .4 * -M 22.4 *
Togwotee Pass 9590 18.8 22.8 82 29.8 29.2 102
Triple Peak 8520 12.3 10.4 118 31.4 30.6 103
Two Ocean Plateau 9240 24.3 29.4 83 30.4 31.2 97
Willow Creek 8060 18.7 17.5 107 44.2 40.2 110
Younts Peak 8340 .0 8.2 0 17.3 18.8 92
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Basin Index (%) 84 100
MADISON HEADWATERS IN WYOMING
Black Bear 8160 24.6 34.9 70 40.4 43.0 94
Canyon 7870 .6 3.4 18 16.6 19.4 86
Madison Plateau 7710 9.9 14.4 69 29.8 30.6 97
West Yellowstone 6680 .0 .0 * 16.4 17.0 96
Whiskey Creek 6790 1.5 5.1 29 24.6 24.6 100
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Basin Index (%) 63 95
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 22.8 22.9 100 25.2 25.4 99
Canyon 7870 .6 3.4 18 16.6 19.4 86
Evening Star 9040 20.0 22.8 88 33.8 34.0 99
Fisher Creek 9110 29.8 35.6 84 36.4 40.9 89
Monument Peak 8740 12.2 18.0 68 25.9 27.4 95
Northeast Entrance 7420 .1 .0 * 16.7 16.2 103
Parker Peak 9420 19.2 18.8 102 29.2 24.4 120
Sylvan Lake 8440 5.2 12.9 40 27.6 28.0 99
Thumb Divide 7970 -M .4 * -M 22.4 *
Two Ocean Plateau 9240 24.3 29.4 83 30.4 31.2 97
White Mill 8730 21.6 23.0 94 26.6 27.6 96
Wolverine 7650 .0 .0 * 19.1 15.5 123
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Basin Index (%) 83 99
WIND RIVER
Burroughs Creek 8760 .0 -M * 19.2 -M *
Castle Creek 8410 .0 .0 * 10.6 11.8 90
Cold Springs 9640 .0 .0 * 12.0 13.6 88
Deer Park 9690 9.2 10.2 90 23.8 23.9 100
Hobbs Park 10080 11.1 14.3 78 19.3 19.0 102
Kirwin 9580 3.4 8.8 39 17.8 17.2 103
Little Warm 9370 .0 2.3 0 15.9 15.7 101
South Pass 9040 4.4 8.0 55 21.0 20.6 102
St. Lawrence Alt 8610 .0 -M * 13.0 -M *
Togwotee Pass 9590 18.8 22.8 82 29.8 29.2 102
Townsend Creek 8720 2.4 .8 300* 18.6 16.1 116
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Basin Index (%) 73 101
BIGHORN BASIN
Bald Mtn. 9360 21.1 18.8 112 22.7 20.4 111
Bear Trap Meadow 8200 .1 .0 * 12.1 12.8 95
Bone Springs Div 9340 14.4 14.2 101 16.4 19.6 84
Grave Springs 8560 .3 2.3 13 13.3 13.4 99
Kirwin 9580 3.4 8.8 39 17.8 17.2 103
Marquette 8800 5.3 3.6 147 17.2 15.4 112
Middle Powder 7760 1.9 4.0 48 13.4 14.2 94
Owl Creek 8990 .2 .0 * 11.4 9.8 116
Powder River Pass 9480 .6 5.6 11 16.0 17.4 92
Shell Creek 9570 12.5 14.4 87 17.1 17.8 96
Timber Creek 7910 .2 .0 * 13.2 12.5 106
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Basin Index (%) 84 100
SHOSHONE RIVER
Blackwater 9840 -M 22.9 * 28.2 28.2 100
Evening Star 9040 20.0 22.8 88 33.8 34.0 99
Marquette 8800 5.3 3.6 147 17.2 15.4 112
Sylvan Lake 8440 5.2 12.9 40 27.6 28.0 99
Sylvan Road 7140 .0 .0 * 17.3 19.4 89
Younts Peak 8340 .0 8.2 0 17.3 18.8 92
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Basin Index (%) 64 98
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * 12.1 12.8 95
Cloud Peak Reservoir 9830 10.1 12.8 79 19.4 20.0 97
Grave Springs 8560 .3 2.3 13 13.3 13.4 99
Hansen Sawmill 8360 .0 .0 * 12.9 13.2 98
Middle Powder 7760 1.9 4.0 48 13.4 14.2 94
Powder River Pass 9480 .6 5.6 11 16.0 17.4 92
Soldier Park 8680 .1 .1 100* 11.4 13.1 87
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Basin Index (%) 53 95
TONGUE RIVER
Big Goose 8010 2.3 4.1 56 16.6 16.4 101
Bone Springs Div 9340 14.4 14.2 101 16.4 19.6 84
Burgess Junction 7900 8.4 6.6 127 18.5 16.7 111
Dome Lake 8890 4.5 6.2 73 -M 19.7 *
Little Goose 8560 5.7 6.3 90 20.0 17.7 113
Sucker Creek 8840 9.8 7.6 129 22.9 20.8 110
Tie Creek 7050 .4 .0 * 18.6 17.0 109
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Basin Index (%) 101 104
BELLE FOURCHE
Blind Park 6900 .3 .0 * 14.0 15.1 93
Cole Canyon 5930 .5 .0 * 15.2 14.0 109
North Rapid Creek 6150 -M .0 * 12.8 13.2 97
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Basin Index (%) * 99
CHEYENNE RIVER BASIN
Blind Park 6900 .3 .0 * 14.0 15.1 93
North Rapid Creek 6150 -M .0 * 12.8 13.2 97
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Basin Index (%) * 95
UPPER N. PLATTE
Arapaho Ridge 10960 14.7 19.6 75 24.1 28.4 85
Blackhall Mtn 9830 18.4 28.7 64 35.1 39.4 89
Cinnabar Park 9670 6.6 12.6 52 25.8 28.8 90
Columbine 9170 .0 1.2 0* 30.3 31.1 97
Divide Peak 8700 .0 5.2 0 22.6 25.8 88
Joe Wright 10140 16.8 19.2 88 33.2 33.6 99
Laprele Creek 8370 .1 .0 * 13.0 16.8 77
Med Bow 10500 35.2 -M * 39.3 -M *
Never Summer 10300 18.0 20.0 90 21.1 22.2 95
North French Creek 10150 24.2 29.2 83 35.1 35.8 98
Old Battle 9850 25.0 32.6 77 32.6 42.0 78
Rawah 9100 .0 .4 0* 16.9 20.2 84
Sage Creek Basin 7830 .0 .0 * 14.1 16.7 84
Sand Lake 10080 27.4 27.6 99 32.5 32.4 100
South Brush Creek 8480 .9 .0 * 14.7 19.0 77
Tower 10610 35.1 43.2 81 48.2 49.4 98
Webber Springs 9250 5.5 11.2 49 25.9 32.2 80
Whiskey Park 8950 12.7 22.6 56 32.1 36.0 89
Willow Creek Pass 9520 7.7 10.8 71 16.2 17.7 92
Zirkel 9320 .2 9.3 2 33.9 35.9 94
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Basin Index (%) 73 90
SWEETWATER
Deer Park 9690 9.2 10.2 90 23.8 23.9 100
Larsen Creek 8880 .0 .0 * 15.0 16.8 89
South Pass 9040 4.4 8.0 55 21.0 20.6 102
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Basin Index (%) 75 98
LOWER N. PLATTE
Casper Mtn. 7940 .2 3.0 7 15.5 18.8 82
Laprele Creek 8370 .1 .0 * 13.0 16.8 77
Reno Hill 8410 1.9 4.8 40 18.7 21.8 86
Windy Peak 7900 .2 .0 * 10.2 14.5 70
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Basin Index (%) 31 80
LARAMIE RIVER
Brooklyn Lake 10250 14.3 16.6 86 29.1 28.0 104
Cinnabar Park 9670 6.6 12.6 52 25.8 28.8 90
Crow Creek 8320 .0 .0 * 11.5 14.4 80
Deadman Hill 10240 9.7 16.2 60 22.4 24.0 93
Rawah 9100 .0 .4 0* 16.9 20.2 84
Roach 9710 .5 9.3 5 19.9 24.2 82
Windy Peak 7900 .2 .0 * 10.2 14.5 70
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Basin Index (%) 57 88
S. PLATTE
Crow Creek 8320 .0 .0 * 11.5 14.4 80
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Basin Index (%) * 80
LITTLE SNAKE RIVER
Battle Mountain 7460 .0 .0 * 17.8 19.2 93
Divide Peak 8700 .0 5.2 0 22.6 25.8 88
Elk River 8710 .1 .0 * 22.9 23.7 97
Elkhead Divide 8780 .0 -M * 21.6 -M *
Little Snake River 8930 5.4 12.8 42 34.4 39.6 87
Old Battle 9850 25.0 32.6 77 32.6 42.0 78
Sage Creek Basin 7830 .0 .0 * 14.1 16.7 84
Sandstone RS 8150 .1 .0 * 16.8 21.7 77
Whiskey Park 8950 12.7 22.6 56 32.1 36.0 89
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Basin Index (%) 59 86
UPPER GREEN RIVER
Big Sandy Opening 9100 1.1 3.0 37 15.4 16.4 94
Blind Bull Sum 8880 -M 21.2 * 21.7 21.0 103
East Rim Divide 8010 .0 .0 * 14.6 14.0 104
Elkhart Park G.S. 9410 .8 5.4 15 15.9 16.2 98
Gros Ventre Summit 8760 1.0 5.4 19 16.2 15.6 104
Gunsight Pass 9830 8.2 10.0 82 17.2 17.4 99
Indian Creek 9400 16.9 19.0 89 26.5 24.0 110
Kendall R.S. 7790 .1 .0 * 17.1 16.2 106
Larsen Creek 8880 .0 .0 * 15.0 16.8 89
Loomis Park 8240 .1 1.6 6 20.3 20.6 99
New Fork Lake 8380 .0 .0 * -M 13.7 *
Pocket Creek 9370 -M -M * -M -M *
Snider Basin 8080 .0 .0 * 18.7 16.2 115
Spring Creek Divide 9020 22.8 20.8 110 28.9 28.0 103
Triple Peak 8520 12.3 10.4 118 31.4 30.6 103
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Basin Index (%) 84 102
LOWER GREEN RIVER
Blacks Fork Jct 8880 .0 .0 * 15.2 15.2 100
Buck Pasture 9620 .0 -M * 21.7 -M *
EF Blacks Fork GS 9360 .0 .0 * 16.3 15.8 103
Hams Fork 7870 -M .0 * 15.7 14.1 111
Henrys Fork 10180 -M -M * 15.2 -M *
Hewinta 9510 .0 .0 * 16.8 17.2 98
Hickerson Park 9130 .0 .0 * 11.8 13.2 89
Hole-in-Rock 9170 .0 .0 * 12.2 13.4 91
Indian Creek 9400 16.9 19.0 89 26.5 24.0 110
Kelley R.S. 8240 1.8 2.1 86 21.5 20.4 105
Spirit Lk 10240 .0 3.1 0 17.4 20.5 85
Steel Creek Park 10140 10.4 14.4 72 20.1 21.0 96
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Basin Index (%) 75* 99
UPPER BEAR RIVER
Bear River RS 8510 .0 .0 * 14.8 14.6 101
Bug Lake 7980 .0 5.2 0 22.1 20.3 109
Burts Miller Ranch 7900 .0 .0 * 14.2 9.4 151
Chalk Creek #1 9160 3.3 12.8 26 26.6 28.8 92
Giveout 6940 .0 .0 * 15.9 15.7 101
Hayden Fork 9160 .0 .0 * 24.1 24.8 97
Kelley R.S. 8240 1.8 2.1 86 21.5 20.4 105
Lily Lake 9130 .0 .0 * 17.2 20.4 84
Monte Cristo 8930 9.5 15.0 63 28.7 29.8 96
Salt River Summit 7630 .0 .0 * 15.9 19.0 84
Spring Creek Divide 9020 22.8 20.8 110 28.9 28.0 103
Trial Lake 9970 9.5 14.8 64 27.4 27.0 101
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Basin Index (%) 66 100
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-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.
