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 SUNDAY: MAY 18 , 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 * 24.6 24.4 101
Blind Bull Sum 8880 26.9 22.5 120 21.6 20.8 104
Cottonwood Creek 7710 9.5 9.2 103 33.1 30.0 110
East Rim Divide 8010 .0 .0 * 14.7 13.9 106
Grand Targhee 9260 37.5 44.0 85 36.0 37.8 95
Granite Creek 6770 .0 .5 0* 21.8 22.4 97
Grassy Lake 7330 13.7 18.3 75 39.1 41.2 95
Gros Ventre Summit 8760 2.3 6.8 34 16.1 15.4 105
Gunsight Pass 9830 7.7 11.0 70 16.9 17.4 97
Lewis Lake Divide 7880 15.0 22.8 66 39.7 39.2 101
Loomis Park 8240 .8 3.9 21 20.2 20.5 99
Phillips Bench 8160 14.7 20.4 72 31.3 31.0 101
Salt River Summit 7630 .0 .0 * 16.1 18.9 85
Snake River Station 6900 .0 .0 * 25.3 26.8 94
Somsen Ranch 6830 .2 .0 * 19.0 19.6 97
Spring Creek Divide 9020 22.8 21.1 108 28.6 27.6 104
Thumb Divide 7970 -M 2.2 * -M 22.3 *
Togwotee Pass 9590 18.1 23.2 78 29.2 29.0 101
Triple Peak 8520 12.9 12.0 108 31.2 30.3 103
Two Ocean Plateau 9240 23.5 30.4 77 29.5 31.2 95
Willow Creek 8060 18.1 18.6 97 42.8 40.2 106
Younts Peak 8340 .0 8.8 0 17.1 18.4 93
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Basin Index (%) 82 100
MADISON HEADWATERS IN WYOMING
Black Bear 8160 24.5 36.0 68 39.7 42.8 93
Canyon 7870 1.1 5.0 22 16.3 19.4 84
Madison Plateau 7710 10.1 15.8 64 29.0 30.6 95
West Yellowstone 6680 .1 .0 * 15.6 16.8 93
Whiskey Creek 6790 3.1 6.0 52 24.4 24.4 100
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Basin Index (%) 62 93
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 22.7 23.7 96 24.9 25.2 99
Canyon 7870 1.1 5.0 22 16.3 19.4 84
Evening Star 9040 20.1 24.0 84 33.5 33.8 99
Fisher Creek 9110 30.4 36.0 84 36.0 40.9 88
Monument Peak 8740 12.7 19.6 65 25.6 27.2 94
Northeast Entrance 7420 .1 .0 * 16.1 16.2 99
Parker Peak 9420 18.3 19.8 92 28.3 24.0 118
Sylvan Lake 8440 4.4 13.7 32 26.4 28.0 94
Thumb Divide 7970 -M 2.2 * -M 22.3 *
Two Ocean Plateau 9240 23.5 30.4 77 29.5 31.2 95
White Mill 8730 21.7 24.0 90 26.2 27.6 95
Wolverine 7650 .0 .0 * 18.7 15.4 121
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Basin Index (%) 79 97
WIND RIVER
Burroughs Creek 8760 .2 -M * 19.0 -M *
Castle Creek 8410 .0 .0 * 10.5 11.8 89
Cold Springs 9640 .1 .0 * 11.7 13.5 87
Deer Park 9690 8.9 11.4 78 23.4 23.5 100
Hobbs Park 10080 11.0 15.4 71 18.7 18.8 99
Kirwin 9580 4.0 10.1 40 17.7 16.6 107
Little Warm 9370 .1 4.2 2 15.8 15.5 102
South Pass 9040 4.5 9.2 49 20.6 20.2 102
St. Lawrence Alt 8610 .0 -M * 12.6 -M *
Togwotee Pass 9590 18.1 23.2 78 29.2 29.0 101
Townsend Creek 8720 2.8 1.6 175 18.1 15.7 115
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Basin Index (%) 66 101
BIGHORN BASIN
Bald Mtn. 9360 20.7 19.2 108 22.0 20.3 108
Bear Trap Meadow 8200 .0 .0 * 11.6 12.6 92
Bone Springs Div 9340 14.0 15.1 93 15.7 19.5 81
Grave Springs 8560 .0 4.4 0 12.8 13.3 96
Kirwin 9580 4.0 10.1 40 17.7 16.6 107
Marquette 8800 4.0 4.9 82 15.9 15.1 105
Middle Powder 7760 1.1 4.8 23 12.0 14.0 86
Owl Creek 8990 .0 .0 * 10.7 9.6 111
Powder River Pass 9480 .0 7.2 0 15.1 17.4 87
Shell Creek 9570 12.0 15.0 80 16.5 17.6 94
Timber Creek 7910 .1 .0 * 12.6 12.2 103
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Basin Index (%) 69 97
SHOSHONE RIVER
Blackwater 9840 -M 23.0 * 27.6 27.8 99
Evening Star 9040 20.1 24.0 84 33.5 33.8 99
Marquette 8800 4.0 4.9 82 15.9 15.1 105
Sylvan Lake 8440 4.4 13.7 32 26.4 28.0 94
Sylvan Road 7140 .0 .0 * 16.3 19.3 84
Younts Peak 8340 .0 8.8 0 17.1 18.4 93
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Basin Index (%) 55 96
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 11.6 12.6 92
Cloud Peak Reservoir 9830 9.6 14.6 66 18.6 19.7 94
Grave Springs 8560 .0 4.4 0 12.8 13.3 96
Hansen Sawmill 8360 .1 .1 100* 12.7 13.2 96
Middle Powder 7760 1.1 4.8 23 12.0 14.0 86
Powder River Pass 9480 .0 7.2 0 15.1 17.4 87
Soldier Park 8680 .0 .0 * 11.1 12.8 87
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Basin Index (%) 35 91
TONGUE RIVER
Big Goose 8010 2.0 5.7 35 15.3 16.3 94
Bone Springs Div 9340 14.0 15.1 93 15.7 19.5 81
Burgess Junction 7900 7.8 8.2 95 17.9 16.5 108
Dome Lake 8890 4.0 7.6 53 -M 19.5 *
Little Goose 8560 4.7 7.4 64 18.4 17.6 105
Sucker Creek 8840 8.3 8.6 97 21.1 20.6 102
Tie Creek 7050 .0 .0 * 17.1 16.4 104
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Basin Index (%) 78 99
BELLE FOURCHE
Blind Park 6900 .1 .0 * 13.1 14.8 89
Cole Canyon 5930 .0 .0 * 13.5 14.0 96
North Rapid Creek 6150 -M .0 * 12.0 12.7 94
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Basin Index (%) * 93
CHEYENNE RIVER BASIN
Blind Park 6900 .1 .0 * 13.1 14.8 89
North Rapid Creek 6150 -M .0 * 12.0 12.7 94
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Basin Index (%) * 91
UPPER N. PLATTE
Arapaho Ridge 10960 14.7 19.3 76 24.0 28.2 85
Blackhall Mtn 9830 18.8 27.5 68 34.9 39.2 89
Cinnabar Park 9670 6.6 14.0 47 25.3 27.9 91
Columbine 9170 .0 3.8 0 30.0 31.0 97
Divide Peak 8700 .0 6.4 0 22.3 25.8 86
Joe Wright 10140 16.7 20.2 83 32.8 33.1 99
Laprele Creek 8370 .1 .0 * 12.4 16.4 76
Med Bow 10500 34.4 -M * 38.2 -M *
Never Summer 10300 18.0 20.4 88 20.9 21.9 95
North French Creek 10150 23.2 30.8 75 33.7 35.7 94
Old Battle 9850 25.1 34.0 74 32.5 41.6 78
Rawah 9100 .0 .2 0* 16.8 20.2 83
Sage Creek Basin 7830 .0 .0 * 13.7 16.4 84
Sand Lake 10080 26.5 29.0 91 31.5 31.6 100
South Brush Creek 8480 .2 .0 * 13.7 19.0 72
Tower 10610 34.7 45.4 76 47.4 49.0 97
Webber Springs 9250 6.4 11.9 54 25.8 32.0 81
Whiskey Park 8950 13.3 23.2 57 31.8 35.5 90
Willow Creek Pass 9520 8.2 11.0 75 16.1 17.6 91
Zirkel 9320 .2 10.2 2 33.6 35.6 94
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Basin Index (%) 69 90
SWEETWATER
Deer Park 9690 8.9 11.4 78 23.4 23.5 100
Larsen Creek 8880 .1 .0 * 14.4 16.6 87
South Pass 9040 4.5 9.2 49 20.6 20.2 102
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Basin Index (%) 66 97
LOWER N. PLATTE
Casper Mtn. 7940 .1 3.8 3 14.5 18.8 77
Laprele Creek 8370 .1 .0 * 12.4 16.4 76
Reno Hill 8410 2.0 7.9 25 17.8 21.6 82
Windy Peak 7900 .2 .0 * 10.0 14.4 69
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Basin Index (%) 21 77
LARAMIE RIVER
Brooklyn Lake 10250 14.1 18.0 78 28.5 27.5 104
Cinnabar Park 9670 6.6 14.0 47 25.3 27.9 91
Crow Creek 8320 .0 .0 * 11.3 14.0 81
Deadman Hill 10240 9.9 17.3 57 22.2 23.8 93
Rawah 9100 .0 .2 0* 16.8 20.2 83
Roach 9710 .8 10.4 8 19.7 24.2 81
Windy Peak 7900 .2 .0 * 10.0 14.4 69
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Basin Index (%) 53 88
S. PLATTE
Crow Creek 8320 .0 .0 * 11.3 14.0 81
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Basin Index (%) * 81
LITTLE SNAKE RIVER
Battle Mountain 7460 .0 .0 * 17.7 18.6 95
Divide Peak 8700 .0 6.4 0 22.3 25.8 86
Elk River 8710 .0 .2 0* 22.7 23.7 96
Elkhead Divide 8780 .0 -M * 21.5 -M *
Little Snake River 8930 5.8 13.1 44 34.0 39.4 86
Old Battle 9850 25.1 34.0 74 32.5 41.6 78
Sage Creek Basin 7830 .0 .0 * 13.7 16.4 84
Sandstone RS 8150 .1 .0 * 16.7 21.6 77
Whiskey Park 8950 13.3 23.2 57 31.8 35.5 90
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Basin Index (%) 58 86
UPPER GREEN RIVER
Big Sandy Opening 9100 .6 5.6 11 14.4 16.0 90
Blind Bull Sum 8880 26.9 22.5 120 21.6 20.8 104
East Rim Divide 8010 .0 .0 * 14.7 13.9 106
Elkhart Park G.S. 9410 1.1 6.8 16 15.5 16.0 97
Gros Ventre Summit 8760 2.3 6.8 34 16.1 15.4 105
Gunsight Pass 9830 7.7 11.0 70 16.9 17.4 97
Indian Creek 9400 16.6 20.0 83 26.2 23.8 110
Kendall R.S. 7790 .2 .0 * 17.0 16.0 106
Larsen Creek 8880 .1 .0 * 14.4 16.6 87
Loomis Park 8240 .8 3.9 21 20.2 20.5 99
New Fork Lake 8380 .0 .0 * -M 13.7 *
Pocket Creek 9370 -M -M * -M -M *
Snider Basin 8080 .0 .0 * 18.4 16.1 114
Spring Creek Divide 9020 22.8 21.1 108 28.6 27.6 104
Triple Peak 8520 12.9 12.0 108 31.2 30.3 103
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Basin Index (%) 84 102
LOWER GREEN RIVER
Blacks Fork Jct 8880 .1 .0 * 15.0 15.1 99
Buck Pasture 9620 .0 -M * 21.6 -M *
EF Blacks Fork GS 9360 .1 .0 * 16.1 15.1 107
Hams Fork 7870 -M .0 * 15.5 14.0 111
Henrys Fork 10180 -M -M * 15.0 -M *
Hewinta 9510 .0 .0 * 16.5 17.1 96
Hickerson Park 9130 .0 .0 * 11.6 13.2 88
Hole-in-Rock 9170 .0 .0 * 11.9 13.4 89
Indian Creek 9400 16.6 20.0 83 26.2 23.8 110
Kelley R.S. 8240 1.9 2.9 66 20.9 20.0 104
Spirit Lk 10240 .0 4.3 0 17.1 20.2 85
Steel Creek Park 10140 10.0 15.1 66 19.7 21.0 94
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Basin Index (%) 68* 99
UPPER BEAR RIVER
Bear River RS 8510 .0 .0 * 14.6 14.4 101
Bug Lake 7980 .0 7.2 0 21.8 20.2 108
Burts Miller Ranch 7900 .0 .0 * 14.0 9.4 149
Chalk Creek #1 9160 3.1 14.4 22 26.4 28.5 93
Giveout 6940 .0 .0 * 15.8 15.3 103
Hayden Fork 9160 .0 .0 * 23.8 24.8 96
Kelley R.S. 8240 1.9 2.9 66 20.9 20.0 104
Lily Lake 9130 .1 .0 * 17.0 20.2 84
Monte Cristo 8930 9.0 16.7 54 28.3 29.8 95
Salt River Summit 7630 .0 .0 * 16.1 18.9 85
Spring Creek Divide 9020 22.8 21.1 108 28.6 27.6 104
Trial Lake 9970 9.5 17.3 55 27.2 27.0 101
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Basin Index (%) 58 99
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-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.
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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.
