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 31 , 2022
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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 7060 .0 .0 * 22.8 25.4 90
Blind Bull Sum 8650 20.2 16.6 122 18.6 23.2 80
Cottonwood Creek 7670 2.7 .0 * 31.5 32.0 98
East Rim Divide 7930 .1 .0 * 14.3 15.0 95
Grand Targhee 9260 31.8 38.6 82 35.8 40.2 89
Granite Creek 6770 .0 .0 * 19.8 24.0 82
Grassy Lake 7265 10.0 7.0 143 38.6 43.1 90
Gros Ventre Summit 8750 2.4 .0 * 15.8 16.1 98
Gunsight Pass 9820 10.3 5.5 187 19.7 18.2 108
Lewis Lake Divide 7850 9.7 12.4 78 39.5 41.0 96
Loomis Park 8240 .0 .0 * 19.7 21.8 90
Phillips Bench 8200 10.0 10.0 100 29.4 31.7 93
Salt River Summit 7640 .0 .0 * 19.9 20.6 97
Snake River Station 6920 .1 .0 * 23.1 28.4 81
Somsen Ranch 6800 .0 .0 * -M 21.0 *
Spring Creek Divide 9000 17.0 14.1 121 28.7 29.6 97
Thumb Divide 7980 1.2 .0 * 24.2 23.3 104
Togwotee Pass 9580 18.8 19.2 98 28.8 31.0 93
Triple Peak 8500 8.5 1.1 773* 32.4 32.2 101
Two Ocean Plateau 9240 28.5 26.4 108 33.3 33.2 100
Willow Creek 8080 11.5 6.0 192 41.0 41.9 98
Younts Peak 8350 .1 .2 50* 17.1 20.2 85
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Basin Index (%) 116* 94
MADISON HEADWATERS IN WYOMING
Black Bear 8170 24.4 27.4 89 39.5 45.6 87
Canyon 7870 2.4 -M * 18.9 -M *
Madison Plateau 7750 9.0 8.8 102 28.6 32.0 89
West Yellowstone 6700 .0 .0 * 18.2 18.2 100
Whiskey Creek 6800 .5 .0 * 24.3 26.2 93
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Basin Index (%) 94 91
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 -M 19.4 * 24.4 27.1 90
Canyon 7870 2.4 -M * 18.9 -M *
Evening Star 9200 26.7 19.2 139 33.7 36.2 93
Fisher Creek 9100 34.8 30.3 115 42.1 42.2 100
Monument Peak 8850 18.7 14.4 130 31.5 28.3 111
Northeast Entrance 7350 .8 .0 * 18.4 17.4 106
Parker Peak 9400 23.6 14.4 164 29.7 25.4 117
Sylvan Lake 8420 8.9 6.2 144 30.2 29.9 101
Thumb Divide 7980 1.2 .0 * 24.2 23.3 104
Two Ocean Plateau 9240 28.5 26.4 108 33.3 33.2 100
White Mill 8700 22.2 18.0 123 29.5 28.9 102
Wolverine 7650 1.1 .0 * 19.0 16.4 116
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Basin Index (%) 129 102
WIND RIVER
Burroughs Creek 8750 .8 -M * 19.2 -M *
Castle Creek 8400 .7 .0 * 12.4 13.4 93
Cold Springs 9630 1.1 .0 * 18.1 16.0 113
Deer Park 9700 6.7 4.5 149 23.1 24.8 93
Hobbs Park 10100 15.0 6.1 246 24.4 20.4 120
Kirwin 9550 -M 1.6 * 21.0 18.4 114
Little Warm 9370 2.3 .0 * 19.4 16.8 115
South Pass 9040 1.0 .6 167* 19.5 21.2 92
St. Lawrence Alt 8620 .7 -M * 14.5 -M *
Togwotee Pass 9580 18.8 19.2 98 28.8 31.0 93
Townsend Creek 8700 .5 .0 * 19.0 18.0 106
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Basin Index (%) 152* 103
BIGHORN BASIN
Bald Mtn. 9380 17.9 14.0 128 22.0 22.2 99
Bear Trap Meadow 8200 -M .0 * 16.6 14.1 118
Bone Springs Div 9350 -M 9.0 * 19.7 21.1 93
Grave Springs 8550 .9 .0 * 16.0 14.7 109
Kirwin 9550 -M 1.6 * 21.0 18.4 114
Marquette 8760 5.7 .0 * 18.7 17.6 106
Middle Powder 7760 1.6 .0 * 16.8 16.0 105
Owl Creek 8975 .8 .0 * 12.4 11.4 109
Powder River Pass 9480 1.6 .0 * 14.4 18.8 77
Shell Creek 9580 14.2 8.2 173 21.0 19.4 108
Timber Creek 7950 2.2 .0 * 16.0 14.0 114
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Basin Index (%) 202* 104
SHOSHONE RIVER
Blackwater 9780 27.0 20.8 130 32.6 30.2 108
Evening Star 9200 26.7 19.2 139 33.7 36.2 93
Marquette 8760 5.7 .0 * 18.7 17.6 106
Sylvan Lake 8420 8.9 6.2 144 30.2 29.9 101
Sylvan Road 7120 .1 .0 * -M 21.1 *
Younts Peak 8350 .1 .2 50* 17.1 20.2 85
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Basin Index (%) 148 99
POWDER RIVER
Bear Trap Meadow 8200 -M .0 * 16.6 14.1 118
Cloud Peak Reservoir 9860 -M 6.2 * 25.3 22.0 115
Grave Springs 8550 .9 .0 * 16.0 14.7 109
Hansen Sawmill 8360 1.6 .0 * 15.5 14.9 104
Middle Powder 7760 1.6 .0 * 16.8 16.0 105
Powder River Pass 9480 1.6 .0 * 14.4 18.8 77
Soldier Park 8720 1.6 .0 * 16.1 15.8 102
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Basin Index (%) * 104
TONGUE RIVER
Big Goose 7990 4.8 .0 * 21.2 19.2 110
Bone Springs Div 9350 -M 9.0 * 19.7 21.1 93
Burgess Junction 7880 -M .0 * -M 18.1 *
Dome Lake 8880 -M .1 * 23.6 20.7 114
Little Goose 8870 7.8 1.8 433 24.5 21.0 117
Sucker Creek 8880 -M .8 * 28.2 21.8 129
Tie Creek 6870 .6 .0 * 21.9 19.0 115
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Basin Index (%) 733* 113
BELLE FOURCHE
Blind Park 6890 .0 .0 * 17.6 16.4 107
Cole Canyon 5910 .0 .0 * 18.5 15.8 117
North Rapid Creek 6130 .1 .0 * 11.4 14.8 77
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Basin Index (%) * 101
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 17.6 16.4 107
North Rapid Creek 6130 .1 .0 * 11.4 14.8 77
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Basin Index (%) * 93
UPPER N. PLATTE
Arapaho Ridge 10976 9.7 11.7 83 27.1 28.6 95
Blackhall Mtn 9839 14.6 25.9 56 37.3 41.2 91
Cinnabar Park 9707 .3 3.2 9 25.6 29.4 87
Columbine 9167 -M .0 * 31.2 31.8 98
Divide Peak 8730 .0 .0 * 25.5 26.8 95
Joe Wright 10158 17.6 14.0 126 39.1 34.6 113
Laprele Creek 8390 .3 .0 * 16.4 17.8 92
Med Bow 10512 28.9 -M * 38.6 -M *
Never Summer 10323 20.8 17.1 122 24.4 23.6 103
North French Creek 10153 19.2 20.8 92 34.1 36.9 92
Old Battle 9860 24.7 26.2 94 38.2 42.7 89
Rawah 9069 .0 .0 * 22.6 21.1 107
Sage Creek Basin 7850 -M .0 * 14.4 16.9 85
Sand Lake 10098 24.3 23.4 104 33.8 33.2 102
South Brush Creek 8495 .4 .0 * 17.5 19.8 88
Tower 10620 34.0 34.9 97 51.5 50.3 102
Webber Springs 9260 3.7 1.0 370* 31.4 32.6 96
Whiskey Park 9020 -M 7.8 * 36.3 36.2 100
Willow Creek Pass 9523 1.5 1.9 79 20.0 18.4 109
Zirkel 9338 .0 .0 * 39.3 36.4 108
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Basin Index (%) 95 98
SWEETWATER
Deer Park 9700 6.7 4.5 149 23.1 24.8 93
Larsen Creek 9000 .2 .0 * 16.5 17.2 96
South Pass 9040 1.0 .6 167* 19.5 21.2 92
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Basin Index (%) 155* 94
LOWER N. PLATTE
Casper Mtn. 7920 1.6 .0 * 21.5 21.0 102
Laprele Creek 8390 .3 .0 * 16.4 17.8 92
Reno Hill 8430 2.5 .0 * 24.7 23.0 107
Windy Peak 7915 .4 .0 * 14.3 16.5 87
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Basin Index (%) * 98
LARAMIE RIVER
Brooklyn Lake 10250 4.6 6.0 77 28.5 28.8 99
Cinnabar Park 9707 .3 3.2 9 25.6 29.4 87
Crow Creek 8335 .0 .0 * 13.9 16.0 87
Deadman Hill 10239 7.3 8.8 83 25.5 24.2 105
Rawah 9069 .0 .0 * 22.6 21.1 107
Roach 9740 .9 1.6 56* 26.4 24.8 106
Windy Peak 7915 .4 .0 * 14.3 16.5 87
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Basin Index (%) 69* 98
S. PLATTE
Crow Creek 8335 .0 .0 * 13.9 16.0 87
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Basin Index (%) * 87
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 20.3 19.8 103
Divide Peak 8730 .0 .0 * 25.5 26.8 95
Elk River 8739 .0 .0 * 27.3 24.4 112
Elkhead Divide 8800 .0 -M * 26.6 -M *
Little Snake River 8928 1.3 2.6 50* 37.9 40.8 93
Old Battle 9860 24.7 26.2 94 38.2 42.7 89
Sage Creek Basin 7850 -M .0 * 14.4 16.9 85
Sandstone RS 8152 .0 .0 * 20.0 22.0 91
Whiskey Park 9020 -M 7.8 * 36.3 36.2 100
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Basin Index (%) 90* 96
UPPER GREEN RIVER
Big Sandy Opening 9080 .1 .0 * 16.4 17.4 94
Blind Bull Sum 8650 20.2 16.6 122 18.6 23.2 80
East Rim Divide 7930 .1 .0 * 14.3 15.0 95
Elkhart Park G.S. 9400 .8 .0 * 13.6 17.4 78
Gros Ventre Summit 8750 2.4 .0 * 15.8 16.1 98
Gunsight Pass 9820 10.3 5.5 187 19.7 18.2 108
Indian Creek 9425 11.8 12.2 97 24.3 26.0 93
Kendall R.S. 7740 .0 .0 * 17.5 17.3 101
Larsen Creek 9000 .2 .0 * 16.5 17.2 96
Loomis Park 8240 .0 .0 * 19.7 21.8 90
New Fork Lake 8340 .0 .0 * 12.9 15.3 84
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 .0 * 19.2 18.0 107
Spring Creek Divide 9000 17.0 14.1 121 28.7 29.6 97
Triple Peak 8500 8.5 1.1 773* 32.4 32.2 101
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Basin Index (%) 144* 95
LOWER GREEN RIVER
Blacks Fork Jct 8869 .4 .0 * 16.4 15.7 104
Buck Pasture 9632 .3 -M * 21.8 -M *
EF Blacks Fork GS 9360 .0 .0 * 19.1 16.8 114
Hams Fork 7840 .0 .0 * 14.1 14.8 95
Henrys Fork 10182 -M -M * 15.5 -M *
Hewinta 9500 .0 .0 * 18.9 18.0 105
Hickerson Park 9122 1.4 .0 * 14.8 14.4 103
Hole-in-Rock 9168 .0 .0 * 14.0 14.0 100
Indian Creek 9425 11.8 12.2 97 24.3 26.0 93
Kelley R.S. 8180 .0 .0 * 20.7 22.3 93
Spirit Lk 10235 .9 .0 * 17.9 20.6 87
Steel Creek Park 10158 4.5 8.5 53 22.1 21.5 103
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Basin Index (%) 92* 99
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 17.5 15.2 115
Bug Lake 7987 .0 .0 * 23.0 21.8 106
Burts Miller Ranch 8000 .0 .0 * 10.6 9.9 107
Chalk Creek #1 9171 1.7 3.0 57 28.7 29.8 96
Giveout 6930 .2 .0 * 15.4 16.8 92
Hayden Fork 9130 .1 .0 * 26.5 25.8 103
Kelley R.S. 8180 .0 .0 * 20.7 22.3 93
Lily Lake 9133 .2 .0 * 19.9 21.2 94
Monte Cristo 8932 3.4 5.2 65 31.3 30.8 102
Salt River Summit 7640 .0 .0 * 19.9 20.6 97
Spring Creek Divide 9000 17.0 14.1 121 28.7 29.6 97
Trial Lake 9992 .9 5.2 17 27.9 27.8 100
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Basin Index (%) 85* 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.