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: MAY 1 , 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 11.2 10.3 109 22.5 22.8 99
Blind Bull Sum 8880 28.5 24.4 117 20.4 19.3 106
Cottonwood Creek 7710 19.8 17.7 112 31.0 28.1 110
East Rim Divide 8010 2.3 6.4 36 13.8 12.4 111
Grand Targhee 9260 42.6 45.6 93 33.1 36.0 92
Granite Creek 6770 9.8 10.0 98 19.8 20.9 95
Grassy Lake 7330 25.3 29.1 87 37.2 38.4 97
Gros Ventre Summit 8760 11.7 12.0 98 15.4 14.4 107
Gunsight Pass 9830 14.2 13.0 109 16.1 16.1 100
Lewis Lake Divide 7880 27.1 30.3 89 38.3 36.7 104
Loomis Park 8240 10.8 11.7 92 19.5 18.4 106
Phillips Bench 8160 23.9 27.5 87 29.0 28.6 101
Salt River Summit 7630 9.1 8.6 106 15.0 17.8 84
Snake River Station 6900 8.9 9.9 90 23.9 24.8 96
Somsen Ranch 6830 .1 1.4 7 18.0 17.9 101
Spring Creek Divide 9020 28.4 25.2 113 27.5 25.3 109
Thumb Divide 7970 -M 13.2 * -M 20.7 *
Togwotee Pass 9590 24.3 25.4 96 27.8 27.0 103
Triple Peak 8520 23.3 19.4 120 29.8 28.1 106
Two Ocean Plateau 9240 33.1 33.0 100 27.7 29.4 94
Willow Creek 8060 30.3 27.6 110 40.3 37.0 109
Younts Peak 8340 10.3 14.1 73 15.8 17.2 92
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Basin Index (%) 98 101
MADISON HEADWATERS IN WYOMING
Black Bear 8160 32.1 40.1 80 37.0 40.7 91
Canyon 7870 11.0 12.4 89 15.5 17.7 88
Madison Plateau 7710 19.5 23.2 84 27.1 27.6 98
West Yellowstone 6680 .0 .6 0* 14.3 15.8 91
Whiskey Creek 6790 11.6 13.8 84 22.5 22.4 100
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Basin Index (%) 82 94
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 25.5 24.0 106 23.7 22.8 104
Canyon 7870 11.0 12.4 89 15.5 17.7 88
Evening Star 9040 27.8 27.5 101 31.6 31.2 101
Fisher Creek 9110 33.1 35.4 94 35.0 37.0 95
Monument Peak 8740 20.4 22.2 92 24.7 25.4 97
Northeast Entrance 7420 1.7 3.2 53 15.5 14.5 107
Parker Peak 9420 27.6 23.8 116 26.8 22.6 119
Sylvan Lake 8440 15.4 20.2 76 24.8 26.2 95
Thumb Divide 7970 -M 13.2 * -M 20.7 *
Two Ocean Plateau 9240 33.1 33.0 100 27.7 29.4 94
White Mill 8730 27.7 26.1 106 25.3 25.5 99
Wolverine 7650 6.9 4.5 153 17.5 13.6 129
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Basin Index (%) 99 101
WIND RIVER
Burroughs Creek 8760 9.3 -M * 18.3 -M *
Castle Creek 8410 .2 .2 100* 10.0 9.5 105
Cold Springs 9640 3.2 4.1 78 11.2 11.2 100
Deer Park 9690 17.5 15.5 113 22.6 21.7 104
Hobbs Park 10080 15.9 16.8 95 17.9 16.4 109
Kirwin 9580 13.4 11.6 116 16.4 14.4 114
Little Warm 9370 9.2 9.0 102 15.2 13.2 115
South Pass 9040 13.8 15.0 92 19.6 18.2 108
St. Lawrence Alt 8610 .0 -M * 12.0 -M *
Togwotee Pass 9590 24.3 25.4 96 27.8 27.0 103
Townsend Creek 8720 11.1 9.0 123 16.5 13.6 121
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Basin Index (%) 102 108
BIGHORN BASIN
Bald Mtn. 9360 23.8 21.0 113 19.8 18.3 108
Bear Trap Meadow 8200 .2 2.2 9 9.2 11.0 84
Bone Springs Div 9340 19.6 17.6 111 14.3 18.2 79
Grave Springs 8560 5.2 8.7 60 11.5 12.2 94
Kirwin 9580 13.4 11.6 116 16.4 14.4 114
Marquette 8800 10.8 8.0 135 14.4 12.2 118
Middle Powder 7760 9.7 11.4 85 10.5 12.2 86
Owl Creek 8990 .6 1.2 50 9.6 8.3 116
Powder River Pass 9480 6.9 10.0 69 13.7 15.2 90
Shell Creek 9570 15.7 16.2 97 15.2 15.9 96
Timber Creek 7910 5.1 3.2 159 11.2 10.0 112
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Basin Index (%) 100 99
SHOSHONE RIVER
Blackwater 9840 28.4 25.7 111 26.4 25.2 105
Evening Star 9040 27.8 27.5 101 31.6 31.2 101
Marquette 8800 10.8 8.0 135 14.4 12.2 118
Sylvan Lake 8440 15.4 20.2 76 24.8 26.2 95
Sylvan Road 7140 .0 5.0 0 15.6 18.1 86
Younts Peak 8340 10.3 14.1 73 15.8 17.2 92
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Basin Index (%) 92 99
POWDER RIVER
Bear Trap Meadow 8200 .2 2.2 9 9.2 11.0 84
Cloud Peak Reservoir 9830 13.1 16.0 82 16.2 17.0 95
Grave Springs 8560 5.2 8.7 60 11.5 12.2 94
Hansen Sawmill 8360 4.4 4.2 105 11.1 10.8 103
Middle Powder 7760 9.7 11.4 85 10.5 12.2 86
Powder River Pass 9480 6.9 10.0 69 13.7 15.2 90
Soldier Park 8680 .6 4.0 15 9.4 11.4 82
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Basin Index (%) 71 91
TONGUE RIVER
Big Goose 8010 9.6 8.4 114 13.8 13.1 105
Bone Springs Div 9340 19.6 17.6 111 14.3 18.2 79
Burgess Junction 7900 13.2 12.1 109 15.2 14.8 103
Dome Lake 8890 12.4 11.4 109 -M 15.8 *
Little Goose 8560 11.5 10.2 113 16.5 15.8 104
Sucker Creek 8840 13.6 12.6 108 18.6 17.2 108
Tie Creek 7050 4.2 2.6 162 15.0 13.8 109
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Basin Index (%) 112 101
BELLE FOURCHE
Blind Park 6900 .2 .3 67* 11.1 13.6 82
Cole Canyon 5930 -M 1.0 * -M 11.5 *
North Rapid Creek 6150 -M .3 * 10.1 10.8 94
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Basin Index (%) 67* 87
CHEYENNE RIVER BASIN
Blind Park 6900 .2 .3 67* 11.1 13.6 82
North Rapid Creek 6150 -M .3 * 10.1 10.8 94
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Basin Index (%) 67* 87
UPPER N. PLATTE
Arapaho Ridge 10960 18.7 23.2 81 22.4 25.1 89
Blackhall Mtn 9830 28.2 31.1 91 33.7 35.4 95
Cinnabar Park 9670 12.2 19.7 62 23.5 27.2 86
Columbine 9170 11.3 17.4 65 28.5 28.6 100
Divide Peak 8700 9.0 16.1 56 21.5 25.0 86
Joe Wright 10140 21.2 22.5 94 30.7 30.2 102
Laprele Creek 8370 1.9 6.5 29 11.6 14.8 78
Med Bow 10500 39.8 -M * 36.6 -M *
Never Summer 10300 21.6 22.2 97 19.0 19.8 96
North French Creek 10150 30.8 32.4 95 32.3 32.8 98
Old Battle 9850 29.9 35.5 84 31.1 38.6 81
Rawah 9100 4.2 6.8 62 15.9 19.0 84
Sage Creek Basin 7830 .0 1.8 0 13.1 14.7 89
Sand Lake 10080 28.7 31.2 92 29.5 29.0 102
South Brush Creek 8480 .4 6.8 6 13.5 16.1 84
Tower 10610 42.2 46.2 91 45.3 45.0 101
Webber Springs 9250 14.3 21.6 66 24.6 29.4 84
Whiskey Park 8950 22.3 27.8 80 30.7 32.6 94
Willow Creek Pass 9520 13.4 15.5 86 15.1 16.0 94
Zirkel 9320 10.8 22.8 47 32.3 34.6 93
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Basin Index (%) 79 92
SWEETWATER
Deer Park 9690 17.5 15.5 113 22.6 21.7 104
Larsen Creek 8880 .0 3.8 0 14.0 15.8 89
South Pass 9040 13.8 15.0 92 19.6 18.2 108
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Basin Index (%) 91 101
LOWER N. PLATTE
Casper Mtn. 7940 7.4 12.9 57 13.8 17.6 78
Laprele Creek 8370 1.9 6.5 29 11.6 14.8 78
Reno Hill 8410 11.9 13.6 88 17.0 18.5 92
Windy Peak 7900 .7 4.1 17 8.9 12.6 71
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Basin Index (%) 59 81
LARAMIE RIVER
Brooklyn Lake 10250 19.4 23.0 84 26.2 25.0 105
Cinnabar Park 9670 12.2 19.7 62 23.5 27.2 86
Crow Creek 8320 .1 .7 14 9.8 12.4 79
Deadman Hill 10240 14.5 19.8 73 19.4 21.2 92
Rawah 9100 4.2 6.8 62 15.9 19.0 84
Roach 9710 9.0 16.1 56 18.6 21.6 86
Windy Peak 7900 .7 4.1 17 8.9 12.6 71
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Basin Index (%) 67 88
S. PLATTE
Crow Creek 8320 .1 .7 14 9.8 12.4 79
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Basin Index (%) 14 79
LITTLE SNAKE RIVER
Battle Mountain 7460 .0 .6 0* 16.9 17.6 96
Divide Peak 8700 9.0 16.1 56 21.5 25.0 86
Elk River 8710 5.3 12.7 42 21.6 22.8 95
Elkhead Divide 8780 8.2 -M * 20.9 -M *
Little Snake River 8930 17.3 24.4 71 32.9 36.7 90
Old Battle 9850 29.9 35.5 84 31.1 38.6 81
Sage Creek Basin 7830 .0 1.8 0 13.1 14.7 89
Sandstone RS 8150 1.5 6.7 22 16.1 20.0 80
Whiskey Park 8950 22.3 27.8 80 30.7 32.6 94
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Basin Index (%) 68 88
UPPER GREEN RIVER
Big Sandy Opening 9100 11.5 11.8 97 13.9 15.0 93
Blind Bull Sum 8880 28.5 24.4 117 20.4 19.3 106
East Rim Divide 8010 2.3 6.4 36 13.8 12.4 111
Elkhart Park G.S. 9410 11.0 11.4 96 14.9 13.8 108
Gros Ventre Summit 8760 11.7 12.0 98 15.4 14.4 107
Gunsight Pass 9830 14.2 13.0 109 16.1 16.1 100
Indian Creek 9400 24.7 22.4 110 25.0 21.2 118
Kendall R.S. 7790 6.2 4.7 132 16.5 14.4 115
Larsen Creek 8880 .0 3.8 0 14.0 15.8 89
Loomis Park 8240 10.8 11.7 92 19.5 18.4 106
New Fork Lake 8380 4.6 6.2 74 -M 11.9 *
Pocket Creek 9370 -M -M * -M -M *
Snider Basin 8080 6.6 7.2 92 17.8 15.1 118
Spring Creek Divide 9020 28.4 25.2 113 27.5 25.3 109
Triple Peak 8520 23.3 19.4 120 29.8 28.1 106
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Basin Index (%) 102 107
LOWER GREEN RIVER
Blacks Fork Jct 8880 2.5 4.2 60 14.4 14.2 101
Buck Pasture 9620 7.6 -M * 20.1 -M *
EF Blacks Fork GS 9360 2.4 8.1 30 13.8 13.5 102
Hams Fork 7870 .1 3.0 3 14.7 12.0 122
Henrys Fork 10180 -M -M * 14.1 -M *
Hewinta 9510 1.0 6.2 16 15.6 15.9 98
Hickerson Park 9130 .0 3.9 0 10.8 12.0 90
Hole-in-Rock 9170 .0 2.8 0 11.3 11.6 97
Indian Creek 9400 24.7 22.4 110 25.0 21.2 118
Kelley R.S. 8240 12.1 11.2 108 19.8 18.0 110
Spirit Lk 10240 9.3 12.3 76 16.1 19.9 81
Steel Creek Park 10140 15.5 17.2 90 18.6 18.8 99
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Basin Index (%) 74 102
UPPER BEAR RIVER
Bear River RS 8510 .0 .5 0* 13.8 13.8 100
Bug Lake 7980 10.1 14.4 70 20.7 19.4 107
Burts Miller Ranch 7900 .0 .0 * 13.0 8.7 149
Chalk Creek #1 9160 15.1 21.6 70 24.7 25.6 96
Giveout 6940 .0 .0 * 14.2 13.8 103
Hayden Fork 9160 1.8 9.5 19 22.6 23.1 98
Kelley R.S. 8240 12.1 11.2 108 19.8 18.0 110
Lily Lake 9130 5.3 10.5 50 16.0 18.0 89
Monte Cristo 8930 18.0 24.6 73 26.2 28.0 94
Salt River Summit 7630 9.1 8.6 106 15.0 17.8 84
Spring Creek Divide 9020 28.4 25.2 113 27.5 25.3 109
Trial Lake 9970 20.4 22.9 89 26.0 24.7 105
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Basin Index (%) 81 101
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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.
