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: SEPTEMBER 15 , 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 * 29.1 31.6 92
Blind Bull Sum 8650 .0 .0 * 23.5 27.8 85
Cottonwood Creek 7670 .0 .0 * 36.0 38.4 94
East Rim Divide 7930 -M .0 * -M 18.7 *
Grand Targhee 9260 .0 .0 * 44.4 50.2 88
Granite Creek 6770 .0 .0 * 24.3 29.6 82
Grassy Lake 7265 .0 .0 * 45.3 50.2 90
Gros Ventre Summit 8750 1.3 .0 * 22.1 21.4 103
Gunsight Pass 9820 .2 .0 * 25.7 24.2 106
Lewis Lake Divide 7850 .0 .0 * 46.5 48.0 97
Loomis Park 8240 .2 .0 * 24.0 27.2 88
Phillips Bench 8200 .2 .0 * 34.4 39.8 86
Salt River Summit 7640 .4 .0 * 22.6 24.8 91
Snake River Station 6920 .0 .0 * 29.0 34.0 85
Somsen Ranch 6800 .0 .0 * 24.5 25.6 96
Spring Creek Divide 9000 .0 .0 * 34.3 35.0 98
Thumb Divide 7980 .1 .0 * 30.6 28.4 108
Togwotee Pass 9580 .1 .0 * 34.3 37.0 93
Triple Peak 8500 .0 .0 * 38.0 37.8 101
Two Ocean Plateau 9240 .3 .0 * 43.1 40.4 107
Willow Creek 8080 .0 .0 * 46.6 50.8 92
Younts Peak 8350 .4 .0 * -M 27.0 *
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Basin Index (%) * 94
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .0 * 47.6 53.1 90
Canyon 7870 -M -M * 25.9 -M *
Madison Plateau 7750 .1 .0 * 36.6 39.8 92
West Yellowstone 6700 .0 .0 * 26.5 23.8 111
Whiskey Creek 6800 .0 .0 * 31.7 32.6 97
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Basin Index (%) * 95
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 33.4 34.0 98
Canyon 7870 -M -M * 25.9 -M *
Evening Star 9200 .0 .0 * 46.2 42.8 108
Fisher Creek 9100 .1 .0 * 55.6 51.0 109
Monument Peak 8850 .0 .0 * 40.5 37.0 109
Northeast Entrance 7350 .1 .0 * 28.9 23.8 121
Parker Peak 9400 .0 .0 * 40.7 32.1 127
Sylvan Lake 8420 .0 .0 * 38.0 37.8 101
Thumb Divide 7980 .1 .0 * 30.6 28.4 108
Two Ocean Plateau 9240 .3 .0 * 43.1 40.4 107
White Mill 8700 .0 .0 * 42.6 38.2 112
Wolverine 7650 .0 .0 * 26.5 21.8 122
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Basin Index (%) * 110
WIND RIVER
Burroughs Creek 8750 .0 -M * 24.7 -M *
Castle Creek 8400 .0 .0 * 17.6 17.0 104
Cold Springs 9630 .0 .0 * 23.0 19.9 116
Deer Park 9700 .0 .0 * 28.6 29.6 97
Hobbs Park 10100 .2 .0 * 30.8 25.9 119
Kirwin 9550 .0 .0 * 25.6 25.6 100
Little Warm 9370 .0 .0 * 23.8 23.4 102
South Pass 9040 .1 .0 * 23.8 25.2 94
St. Lawrence Alt 8620 .0 -M * 17.7 -M *
Togwotee Pass 9580 .1 .0 * 34.3 37.0 93
Townsend Creek 8700 .0 .0 * 23.9 24.5 98
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Basin Index (%) * 101
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 29.6 29.6 100
Bear Trap Meadow 8200 .0 .0 * 22.0 19.4 113
Bone Springs Div 9350 .0 .0 * 27.6 28.8 96
Grave Springs 8550 .1 .0 * 22.1 18.6 119
Kirwin 9550 .0 .0 * 25.6 25.6 100
Marquette 8760 -M .0 * -M 24.1 *
Middle Powder 7760 .0 .0 * 22.5 20.2 111
Owl Creek 8975 -M .0 * -M 17.0 *
Powder River Pass 9480 .0 .0 * 25.4 26.6 95
Shell Creek 9580 .0 .0 * 28.1 26.0 108
Timber Creek 7950 .0 .0 * 19.5 21.3 92
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Basin Index (%) * 103
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 38.5 35.3 109
Evening Star 9200 .0 .0 * 46.2 42.8 108
Marquette 8760 -M .0 * -M 24.1 *
Sylvan Lake 8420 .0 .0 * 38.0 37.8 101
Sylvan Road 7120 .0 .0 * -M 26.2 *
Younts Peak 8350 .4 .0 * -M 27.0 *
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Basin Index (%) * 106
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 22.0 19.4 113
Cloud Peak Reservoir 9860 .0 .0 * 31.9 28.8 111
Grave Springs 8550 .1 .0 * 22.1 18.6 119
Hansen Sawmill 8360 .0 .0 * 22.4 21.7 103
Middle Powder 7760 .0 .0 * 22.5 20.2 111
Powder River Pass 9480 .0 .0 * 25.4 26.6 95
Soldier Park 8720 .0 .0 * 22.7 21.6 105
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Basin Index (%) * 108
TONGUE RIVER
Big Goose 7990 .0 .0 * 26.9 23.7 114
Bone Springs Div 9350 .0 .0 * 27.6 28.8 96
Burgess Junction 7880 .0 .0 * 26.8 24.3 110
Dome Lake 8880 .0 .0 * 31.7 27.6 115
Little Goose 8870 .0 .0 * 31.7 27.0 117
Sucker Creek 8880 .0 .0 * 34.4 29.4 117
Tie Creek 6870 .0 .0 * 26.9 25.4 106
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Basin Index (%) * 111
BELLE FOURCHE
Blind Park 6890 .0 .0 * 26.0 26.4 98
Cole Canyon 5910 .0 .0 * 24.5 24.2 101
North Rapid Creek 6130 .0 .0 * 23.4 23.7 99
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Basin Index (%) * 99
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 26.0 26.4 98
North Rapid Creek 6130 .0 .0 * 23.4 23.7 99
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Basin Index (%) * 99
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 33.8 36.0 94
Blackhall Mtn 9839 -M .0 * -M 43.0 *
Cinnabar Park 9707 .0 .0 * 30.0 34.1 88
Columbine 9167 .1 .0 * 36.5 36.6 100
Divide Peak 8730 .1 .0 * 27.9 31.0 90
Joe Wright 10158 .2 .0 * 45.6 41.7 109
Laprele Creek 8390 .1 .0 * 20.5 22.4 92
Med Bow 10512 -M -M * 43.2 -M *
Never Summer 10323 -M .0 * -M 31.0 *
North French Creek 10153 .0 .0 * 38.0 41.9 91
Old Battle 9860 .0 .0 * 43.7 49.4 88
Rawah 9069 -M .0 * 27.8 27.2 102
Sage Creek Basin 7850 .1 .0 * 16.9 21.0 80
Sand Lake 10098 .0 .0 * 37.4 39.6 94
South Brush Creek 8495 .0 .0 * 18.8 24.3 77
Tower 10620 .1 .0 * 57.5 56.4 102
Webber Springs 9260 .1 .0 * 36.4 39.2 93
Whiskey Park 9020 .1 .0 * 40.8 40.8 100
Willow Creek Pass 9523 -M .0 * -M 24.8 *
Zirkel 9338 -M .0 * -M 41.8 *
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Basin Index (%) * 94
SWEETWATER
Deer Park 9700 .0 .0 * 28.6 29.6 97
Larsen Creek 9000 1.3 .0 * 22.5 20.8 108
South Pass 9040 .1 .0 * 23.8 25.2 94
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Basin Index (%) * 99
LOWER N. PLATTE
Casper Mtn. 7920 .4 .0 * 27.2 24.3 112
Laprele Creek 8390 .1 .0 * 20.5 22.4 92
Reno Hill 8430 .1 .0 * 28.7 27.6 104
Windy Peak 7915 -M .0 * -M 21.8 *
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Basin Index (%) * 103
LARAMIE RIVER
Brooklyn Lake 10250 .1 .0 * 33.9 33.6 101
Cinnabar Park 9707 .0 .0 * 30.0 34.1 88
Crow Creek 8335 .1 .0 * -M 23.5 *
Deadman Hill 10239 .2 .0 * 30.7 29.3 105
Rawah 9069 -M .0 * 27.8 27.2 102
Roach 9740 .0 .0 * 32.4 32.1 101
Windy Peak 7915 -M .0 * -M 21.8 *
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Basin Index (%) * 99
S. PLATTE
Crow Creek 8335 .1 .0 * -M 23.5 *
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Basin Index (%) * *
LITTLE SNAKE RIVER
Battle Mountain 7498 .1 .0 * 25.3 23.4 108
Divide Peak 8730 .1 .0 * 27.9 31.0 90
Elk River 8739 .0 .0 * 32.5 29.8 109
Elkhead Divide 8800 .1 -M * 31.3 -M *
Little Snake River 8928 .1 .0 * 43.1 46.5 93
Old Battle 9860 .0 .0 * 43.7 49.4 88
Sage Creek Basin 7850 .1 .0 * 16.9 21.0 80
Sandstone RS 8152 .1 .0 * 24.1 26.8 90
Whiskey Park 9020 .1 .0 * 40.8 40.8 100
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Basin Index (%) * 95
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 21.4 22.0 97
Blind Bull Sum 8650 .0 .0 * 23.5 27.8 85
East Rim Divide 7930 -M .0 * -M 18.7 *
Elkhart Park G.S. 9400 .0 .0 * 18.0 22.2 81
Gros Ventre Summit 8750 1.3 .0 * 22.1 21.4 103
Gunsight Pass 9820 .2 .0 * 25.7 24.2 106
Indian Creek 9425 .0 .0 * 27.5 30.6 90
Kendall R.S. 7740 .0 .0 * 22.4 20.7 108
Larsen Creek 9000 1.3 .0 * 22.5 20.8 108
Loomis Park 8240 .2 .0 * 24.0 27.2 88
New Fork Lake 8340 .0 .0 * 16.3 20.2 81
Pocket Creek 9360 -M -M * 18.9 -M *
Snider Basin 8060 -M .0 * -M 21.2 *
Spring Creek Divide 9000 .0 .0 * 34.3 35.0 98
Triple Peak 8500 .0 .0 * 38.0 37.8 101
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Basin Index (%) * 95
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 .0 * 23.1 19.9 116
Buck Pasture 9632 .0 -M * 30.3 -M *
EF Blacks Fork GS 9360 .0 .0 * 26.8 23.1 116
Hams Fork 7840 .0 .0 * 15.7 18.9 83
Henrys Fork 10182 -M -M * 24.7 -M *
Hewinta 9500 .0 .0 * 27.7 24.4 114
Hickerson Park 9122 .0 .0 * 22.4 20.6 109
Hole-in-Rock 9168 .0 .0 * 23.0 20.6 112
Indian Creek 9425 .0 .0 * 27.5 30.6 90
Kelley R.S. 8180 .0 .0 * 23.9 26.2 91
Spirit Lk 10235 .0 .0 * 30.4 29.4 103
Steel Creek Park 10158 .0 .0 * 30.7 28.8 107
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Basin Index (%) * 104
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 24.8 20.6 120
Bug Lake 7987 .0 .0 * 27.0 26.6 102
Burts Miller Ranch 8000 .0 .0 * 13.5 13.0 104
Chalk Creek #1 9171 .0 .0 * 36.9 35.2 105
Giveout 6930 -M .0 * 18.2 21.0 87
Hayden Fork 9130 .0 .0 * 32.7 33.7 97
Kelley R.S. 8180 .0 .0 * 23.9 26.2 91
Lily Lake 9133 .0 .0 * 27.5 27.0 102
Monte Cristo 8932 .2 .0 * 35.0 36.3 96
Salt River Summit 7640 .4 .0 * 22.6 24.8 91
Spring Creek Divide 9000 .0 .0 * 34.3 35.0 98
Trial Lake 9992 .0 .0 * 34.7 35.0 99
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Basin Index (%) * 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.
