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 SATURDAY: SEPTEMBER 9 , 2023
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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 -M .0 * 31.1 30.9 101
Blind Bull Sum 8650 .0 .0 * 30.5 27.6 111
Cottonwood Creek 7670 .0 .0 * 45.3 37.8 120
East Rim Divide 7930 -M .0 * 23.3 18.4 127
Grand Targhee 9260 -M .0 * 46.9 48.3 97
Granite Creek 6770 -M .0 * 23.4 29.4 80
Grassy Lake 7265 -M .0 * 54.3 50.0 109
Gros Ventre Summit 8750 .0 .0 * 22.2 20.8 107
Gunsight Pass 9820 .1 .0 * 27.2 23.4 116
Lewis Lake Divide 7850 -M .0 * -M 47.4 *
Loomis Park 8240 .1 .0 * 26.6 26.7 100
Phillips Bench 8200 .1 .0 * 39.9 39.0 102
Salt River Summit 7640 -M .0 * 28.9 24.4 118
Snake River Station 6920 .0 .0 * 33.7 33.4 101
Somsen Ranch 6800 -M .0 * 33.6 25.4 132
Spring Creek Divide 9000 .3 .0 * 43.9 34.2 128
Thumb Divide 7980 .1 .0 * 32.2 27.8 116
Togwotee Pass 9580 .0 .0 * 35.3 36.4 97
Triple Peak 8500 -M .0 * 39.4 37.6 105
Two Ocean Plateau 9240 .9 .0 * 41.8 40.1 104
Willow Creek 8080 .0 .0 * 53.1 49.8 107
Younts Peak 8350 -M .0 * -M 26.0 *
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Basin Index (%) * 108
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .1 .0 * 58.2 53.0 110
Canyon 7870 .0 -M * 29.1 -M *
Madison Plateau 7750 .0 .0 * 43.9 39.0 113
West Yellowstone 6700 .0 .0 * 29.2 23.7 123
Whiskey Creek 6800 .0 .0 * 39.8 32.0 124
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Basin Index (%) * 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 31.3 33.4 94
Canyon 7870 .0 -M * 29.1 -M *
Evening Star 9200 .0 .0 * 43.0 42.1 102
Fisher Creek 9100 .0 .0 * 51.7 49.9 104
Monument Peak 8850 .0 .0 * 40.5 37.0 109
Northeast Entrance 7350 .1 .0 * 24.9 23.2 107
Parker Peak 9400 .0 .0 * 37.8 31.6 120
Sylvan Lake 8420 .0 .0 * 38.7 37.5 103
Thumb Divide 7980 .1 .0 * 32.2 27.8 116
Two Ocean Plateau 9240 .9 .0 * 41.8 40.1 104
White Mill 8700 .0 .0 * 37.0 37.6 98
Wolverine 7650 .0 .0 * 21.3 21.2 100
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Basin Index (%) * 105
WIND RIVER
Burroughs Creek 8750 .0 -M * 25.2 -M *
Castle Creek 8400 .1 .0 * 20.6 16.4 126
Cold Springs 9630 .0 .0 * 24.7 19.7 125
Deer Park 9700 .0 .0 * 40.7 29.1 140
Hobbs Park 10100 .0 .0 * 34.5 25.8 134
Kirwin 9550 .0 .0 * 33.1 25.5 130
Little Warm 9370 .0 .0 * 27.9 22.8 122
South Pass 9040 .0 .0 * 34.4 25.0 138
St. Lawrence Alt 8620 .0 -M * 27.7 -M *
Togwotee Pass 9580 .0 .0 * 35.3 36.4 97
Townsend Creek 8700 .0 .0 * 30.3 23.8 127
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Basin Index (%) * 125
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 36.5 29.1 125
Bear Trap Meadow 8200 .0 .0 * 27.8 19.0 146
Bone Springs Div 9350 .0 .0 * 29.7 28.4 105
Grave Springs 8550 .0 .0 * 25.3 18.2 139
Kirwin 9550 .0 .0 * 33.1 25.5 130
Marquette 8760 .0 .0 * 30.0 23.8 126
Middle Powder 7760 .1 .0 * 27.9 19.9 140
Owl Creek 8975 .0 .0 * 27.1 16.7 162
Powder River Pass 9480 .0 .0 * 30.5 26.0 117
Shell Creek 9580 .0 .0 * 29.6 25.1 118
Timber Creek 7950 .0 .0 * 27.7 20.4 136
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Basin Index (%) * 129
SHOSHONE RIVER
Blackwater 9780 .1 .0 * 38.6 35.0 110
Evening Star 9200 .0 .0 * 43.0 42.1 102
Marquette 8760 .0 .0 * 30.0 23.8 126
Sylvan Lake 8420 .0 .0 * 38.7 37.5 103
Sylvan Road 7120 -M .0 * 25.9 25.8 100
Younts Peak 8350 -M .0 * -M 26.0 *
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Basin Index (%) * 107
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 27.8 19.0 146
Cloud Peak Reservoir 9860 .0 .0 * 37.8 28.3 134
Grave Springs 8550 .0 .0 * 25.3 18.2 139
Hansen Sawmill 8360 .0 .0 * 29.4 21.4 137
Middle Powder 7760 .1 .0 * 27.9 19.9 140
Powder River Pass 9480 .0 .0 * 30.5 26.0 117
Soldier Park 8720 .1 .0 * 28.0 21.1 133
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Basin Index (%) * 134
TONGUE RIVER
Big Goose 7990 .1 .0 * 33.0 23.6 140
Bone Springs Div 9350 .0 .0 * 29.7 28.4 105
Burgess Junction 7880 .0 .0 * -M 24.0 *
Dome Lake 8880 .0 .0 * 33.1 27.4 121
Little Goose 8870 .0 .0 * 34.5 25.8 134
Sucker Creek 8880 .0 .0 * 36.7 28.4 129
Tie Creek 6870 .0 .0 * 33.7 25.0 135
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Basin Index (%) * 127
BELLE FOURCHE
Blind Park 6890 .0 .0 * 26.0 26.3 99
Cole Canyon 5910 .1 .0 * 29.7 24.2 123
North Rapid Creek 6130 .0 .0 * 26.4 22.8 116
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Basin Index (%) * 112
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 26.0 26.3 99
North Rapid Creek 6130 .0 .0 * 26.4 22.8 116
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Basin Index (%) * 107
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 38.2 35.6 107
Blackhall Mtn 9839 .0 .0 * 47.5 42.8 111
Cinnabar Park 9707 .0 .0 * 35.0 33.7 104
Columbine 9167 -M .0 * 35.2 36.5 96
Divide Peak 8730 .1 .0 * 36.7 30.4 121
Joe Wright 10158 .0 .0 * 41.5 41.3 100
Laprele Creek 8390 .0 .0 * 26.2 21.8 120
Med Bow 10512 .0 -M * 49.1 -M *
Never Summer 10323 .0 .0 * 35.4 30.4 116
North French Creek 10153 .0 .0 * 42.9 41.3 104
Old Battle 9860 -M .0 * 54.8 48.8 112
Rawah 9069 .0 .0 * 29.7 27.1 110
Sage Creek Basin 7850 .2 .0 * 26.1 20.6 127
Sand Lake 10098 .1 .0 * 41.6 39.4 106
South Brush Creek 8495 -M .0 * 23.4 24.0 98
Tower 10620 .1 .0 * 63.8 55.8 114
Webber Springs 9260 .0 .0 * 39.6 38.4 103
Whiskey Park 9020 -M .0 * 43.8 39.8 110
Willow Creek Pass 9523 .0 .0 * 28.3 24.8 114
Zirkel 9338 .0 .0 * 45.0 41.5 108
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Basin Index (%) * 109
SWEETWATER
Deer Park 9700 .0 .0 * 40.7 29.1 140
Larsen Creek 9000 -M .0 * 28.2 20.2 140
South Pass 9040 .0 .0 * 34.4 25.0 138
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Basin Index (%) * 139
LOWER N. PLATTE
Casper Mtn. 7920 .1 .0 * 32.2 24.2 133
Laprele Creek 8390 .0 .0 * 26.2 21.8 120
Reno Hill 8430 .0 .0 * 33.1 27.4 121
Windy Peak 7915 .2 .0 * 22.7 21.7 105
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Basin Index (%) * 120
LARAMIE RIVER
Brooklyn Lake 10250 .1 .0 * 37.5 33.6 112
Cinnabar Park 9707 .0 .0 * 35.0 33.7 104
Crow Creek 8335 .0 .0 * 21.9 22.9 96
Deadman Hill 10239 .0 .0 * 34.4 29.2 118
Rawah 9069 .0 .0 * 29.7 27.1 110
Roach 9740 .0 .0 * 34.4 31.7 109
Windy Peak 7915 .2 .0 * 22.7 21.7 105
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Basin Index (%) * 108
S. PLATTE
Crow Creek 8335 .0 .0 * 21.9 22.9 96
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Basin Index (%) * 96
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 28.5 22.9 124
Divide Peak 8730 .1 .0 * 36.7 30.4 121
Elk River 8739 .1 .0 * 38.4 29.6 130
Elkhead Divide 8800 .0 -M * 40.6 -M *
Little Snake River 8928 -M .0 * 54.0 46.0 117
Old Battle 9860 -M .0 * 54.8 48.8 112
Sage Creek Basin 7850 .2 .0 * 26.1 20.6 127
Sandstone RS 8152 -M .0 * 32.2 26.6 121
Whiskey Park 9020 -M .0 * 43.8 39.8 110
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Basin Index (%) * 119
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 27.5 21.4 129
Blind Bull Sum 8650 .0 .0 * 30.5 27.6 111
East Rim Divide 7930 -M .0 * 23.3 18.4 127
Elkhart Park G.S. 9400 -M .0 * 25.8 22.1 117
Gros Ventre Summit 8750 .0 .0 * 22.2 20.8 107
Gunsight Pass 9820 .1 .0 * 27.2 23.4 116
Indian Creek 9425 .2 .0 * 35.2 30.4 116
Kendall R.S. 7740 .0 .0 * 22.9 20.4 112
Larsen Creek 9000 -M .0 * 28.2 20.2 140
Loomis Park 8240 .1 .0 * 26.6 26.7 100
New Fork Lake 8340 -M .0 * -M 19.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 26.3 20.8 126
Spring Creek Divide 9000 .3 .0 * 43.9 34.2 128
Triple Peak 8500 -M .0 * 39.4 37.6 105
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Basin Index (%) * 117
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 .0 * 23.6 19.6 120
Buck Pasture 9632 -M -M * 34.2 -M *
EF Blacks Fork GS 9360 .0 .0 * 26.7 22.6 118
Hams Fork 7840 -M .0 * 23.6 18.5 128
Henrys Fork 10182 -M -M * 28.1 -M *
Hewinta 9500 .0 .0 * -M 24.1 *
Hickerson Park 9122 -M .0 * 22.7 20.4 111
Hole-in-Rock 9168 .0 .0 * 23.6 19.8 119
Indian Creek 9425 .2 .0 * 35.2 30.4 116
Kelley R.S. 8180 .1 .0 * 31.7 25.7 123
Spirit Lk 10235 .0 .0 * 36.3 29.0 125
Steel Creek Park 10158 .0 .0 * 33.6 28.4 118
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Basin Index (%) * 120
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 24.6 19.6 126
Bug Lake 7987 .2 .0 * 36.0 26.4 136
Burts Miller Ranch 8000 .1 .0 * 23.0 12.8 180
Chalk Creek #1 9171 .0 .0 * 43.6 34.8 125
Giveout 6930 -M .0 * 24.0 20.6 117
Hayden Fork 9130 -M .0 * 40.4 33.2 122
Kelley R.S. 8180 .1 .0 * 31.7 25.7 123
Lily Lake 9133 .0 .0 * 27.0 26.4 102
Monte Cristo 8932 .0 .0 * 50.8 35.8 142
Salt River Summit 7640 -M .0 * 28.9 24.4 118
Spring Creek Divide 9000 .3 .0 * 43.9 34.2 128
Trial Lake 9992 1.0 .0 * 48.0 34.5 139
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Basin Index (%) * 128
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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.
