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: SEPTEMBER 3 , 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 * 30.2 30.0 101
Blind Bull Sum 8650 .0 .0 * 29.8 27.2 110
Cottonwood Creek 7670 .0 .0 * 43.5 37.5 116
East Rim Divide 7930 -M .0 * 22.5 18.4 122
Grand Targhee 9260 -M .0 * 44.4 47.0 94
Granite Creek 6770 -M .0 * 22.3 29.4 76
Grassy Lake 7265 -M .0 * 52.5 49.2 107
Gros Ventre Summit 8750 .0 .0 * 21.3 20.5 104
Gunsight Pass 9820 .1 .0 * 26.2 23.2 113
Lewis Lake Divide 7850 -M .0 * -M 46.8 *
Loomis Park 8240 .1 .0 * 25.7 25.9 99
Phillips Bench 8200 .2 .0 * 39.4 38.6 102
Salt River Summit 7640 -M .0 * 28.3 24.0 118
Snake River Station 6920 .0 .0 * 32.2 33.0 98
Somsen Ranch 6800 -M .0 * 32.2 25.3 127
Spring Creek Divide 9000 .3 .0 * 43.2 34.0 127
Thumb Divide 7980 .1 .0 * 30.8 27.0 114
Togwotee Pass 9580 .0 .0 * 34.2 35.6 96
Triple Peak 8500 -M .0 * 38.7 37.2 104
Two Ocean Plateau 9240 .9 .0 * 40.5 39.9 102
Willow Creek 8080 .0 .0 * 50.6 49.3 103
Younts Peak 8350 -M .0 * -M 25.6 *
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Basin Index (%) * 106
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .1 .0 * 57.4 52.0 110
Canyon 7870 .0 -M * 28.1 -M *
Madison Plateau 7750 .0 .0 * 43.4 38.8 112
West Yellowstone 6700 .0 .0 * 28.6 23.3 123
Whiskey Creek 6800 .0 .0 * 39.1 31.8 123
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Basin Index (%) * 115
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 30.9 32.7 94
Canyon 7870 .0 -M * 28.1 -M *
Evening Star 9200 .0 .0 * 41.7 41.8 100
Fisher Creek 9100 .0 .0 * 50.8 49.6 102
Monument Peak 8850 .1 .0 * 39.4 36.0 109
Northeast Entrance 7350 .1 .0 * 24.3 23.0 106
Parker Peak 9400 .0 .0 * 36.8 31.2 118
Sylvan Lake 8420 .0 .0 * 37.1 37.0 100
Thumb Divide 7980 .1 .0 * 30.8 27.0 114
Two Ocean Plateau 9240 .9 .0 * 40.5 39.9 102
White Mill 8700 .0 .0 * 36.0 37.0 97
Wolverine 7650 .0 .0 * 20.7 21.0 99
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Basin Index (%) * 103
WIND RIVER
Burroughs Creek 8750 .0 -M * 24.7 -M *
Castle Creek 8400 .1 .0 * 20.1 16.2 124
Cold Springs 9630 .0 .0 * 24.4 19.4 126
Deer Park 9700 .0 .0 * 39.9 28.7 139
Hobbs Park 10100 .0 .0 * 33.9 25.6 132
Kirwin 9550 .0 .0 * 32.4 25.0 130
Little Warm 9370 .0 .0 * 27.2 22.8 119
South Pass 9040 .0 .0 * 33.9 25.0 136
St. Lawrence Alt 8620 .0 -M * 27.2 -M *
Togwotee Pass 9580 .0 .0 * 34.2 35.6 96
Townsend Creek 8700 .0 .0 * 29.8 23.7 126
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Basin Index (%) * 124
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 35.3 29.1 121
Bear Trap Meadow 8200 .0 .0 * 25.9 19.0 136
Bone Springs Div 9350 .0 .0 * 28.3 28.2 100
Grave Springs 8550 .0 .0 * 24.3 18.2 134
Kirwin 9550 .0 .0 * 32.4 25.0 130
Marquette 8760 .0 .0 * 29.2 23.8 123
Middle Powder 7760 .0 .0 * 26.2 19.8 132
Owl Creek 8975 .0 .0 * 26.5 16.5 161
Powder River Pass 9480 .0 .0 * 29.7 25.8 115
Shell Creek 9580 .0 .0 * 28.6 25.1 114
Timber Creek 7950 .0 .0 * 26.9 20.3 133
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Basin Index (%) * 125
SHOSHONE RIVER
Blackwater 9780 .0 .0 * -M 34.4 *
Evening Star 9200 .0 .0 * 41.7 41.8 100
Marquette 8760 .0 .0 * 29.2 23.8 123
Sylvan Lake 8420 .0 .0 * 37.1 37.0 100
Sylvan Road 7120 .0 .0 * 24.8 25.6 97
Younts Peak 8350 -M .0 * -M 25.6 *
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Basin Index (%) * 104
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 25.9 19.0 136
Cloud Peak Reservoir 9860 .0 .0 * 36.6 28.1 130
Grave Springs 8550 .0 .0 * 24.3 18.2 134
Hansen Sawmill 8360 .0 .0 * 28.2 21.4 132
Middle Powder 7760 .0 .0 * 26.2 19.8 132
Powder River Pass 9480 .0 .0 * 29.7 25.8 115
Soldier Park 8720 .0 .0 * 27.2 21.0 130
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Basin Index (%) * 129
TONGUE RIVER
Big Goose 7990 .0 .0 * 31.5 23.2 136
Bone Springs Div 9350 .0 .0 * 28.3 28.2 100
Burgess Junction 7880 .0 .0 * 30.4 23.6 129
Dome Lake 8880 .0 .0 * 32.2 27.0 119
Little Goose 8870 .0 .0 * 33.0 25.8 128
Sucker Creek 8880 .0 .0 * 35.0 28.3 124
Tie Creek 6870 .0 .0 * 31.6 25.0 126
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Basin Index (%) * 123
BELLE FOURCHE
Blind Park 6890 .0 .0 * 25.9 26.3 98
Cole Canyon 5910 .3 .0 * 28.4 24.0 118
North Rapid Creek 6130 .0 .0 * 26.0 22.6 115
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Basin Index (%) * 110
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 25.9 26.3 98
North Rapid Creek 6130 .0 .0 * 26.0 22.6 115
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Basin Index (%) * 106
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 38.2 34.9 109
Blackhall Mtn 9839 .0 .0 * 47.4 42.2 112
Cinnabar Park 9707 .0 .0 * 34.8 33.6 104
Columbine 9167 -M .0 * 35.2 36.0 98
Divide Peak 8730 .1 .0 * 36.4 30.0 121
Joe Wright 10158 .0 .0 * 41.3 41.0 101
Laprele Creek 8390 .0 .0 * 25.9 21.4 121
Med Bow 10512 .1 -M * 48.8 -M *
Never Summer 10323 -M .0 * 34.9 30.1 116
North French Creek 10153 .0 .0 * 42.6 41.0 104
Old Battle 9860 -M .0 * 53.7 48.0 112
Rawah 9069 .0 .0 * 29.5 26.8 110
Sage Creek Basin 7850 .1 .0 * 26.1 20.1 130
Sand Lake 10098 .1 .0 * 41.5 39.0 106
South Brush Creek 8495 .0 .0 * 23.3 23.6 99
Tower 10620 .0 .0 * 63.2 55.6 114
Webber Springs 9260 .0 .0 * 39.0 37.9 103
Whiskey Park 9020 .0 .0 * 43.1 39.8 108
Willow Creek Pass 9523 .0 .0 * 28.1 24.2 116
Zirkel 9338 .0 .0 * 44.6 41.4 108
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Basin Index (%) * 109
SWEETWATER
Deer Park 9700 .0 .0 * 39.9 28.7 139
Larsen Creek 9000 -M .0 * 27.0 20.0 135
South Pass 9040 .0 .0 * 33.9 25.0 136
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Basin Index (%) * 137
LOWER N. PLATTE
Casper Mtn. 7920 .0 .0 * 31.4 24.0 131
Laprele Creek 8390 .0 .0 * 25.9 21.4 121
Reno Hill 8430 .0 .0 * 32.6 27.4 119
Windy Peak 7915 .0 .0 * 22.5 21.6 104
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Basin Index (%) * 119
LARAMIE RIVER
Brooklyn Lake 10250 .0 .0 * 37.3 33.6 111
Cinnabar Park 9707 .0 .0 * 34.8 33.6 104
Crow Creek 8335 .0 .0 * 21.6 22.7 95
Deadman Hill 10239 .0 .0 * 34.2 29.2 117
Rawah 9069 .0 .0 * 29.5 26.8 110
Roach 9740 .0 .0 * 33.8 31.2 108
Windy Peak 7915 .0 .0 * 22.5 21.6 104
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Basin Index (%) * 108
S. PLATTE
Crow Creek 8335 .0 .0 * 21.6 22.7 95
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Basin Index (%) * 95
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 28.2 22.4 126
Divide Peak 8730 .1 .0 * 36.4 30.0 121
Elk River 8739 .0 .0 * 37.8 28.8 131
Elkhead Divide 8800 .0 -M * 40.2 -M *
Little Snake River 8928 .0 .0 * 53.6 45.6 118
Old Battle 9860 -M .0 * 53.7 48.0 112
Sage Creek Basin 7850 .1 .0 * 26.1 20.1 130
Sandstone RS 8152 -M .0 * 32.1 26.0 123
Whiskey Park 9020 .0 .0 * 43.1 39.8 108
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Basin Index (%) * 119
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 26.6 21.2 125
Blind Bull Sum 8650 .0 .0 * 29.8 27.2 110
East Rim Divide 7930 -M .0 * 22.5 18.4 122
Elkhart Park G.S. 9400 -M .0 * 24.5 22.1 111
Gros Ventre Summit 8750 .0 .0 * 21.3 20.5 104
Gunsight Pass 9820 .1 .0 * 26.2 23.2 113
Indian Creek 9425 .2 .0 * 34.6 30.0 115
Kendall R.S. 7740 .0 .0 * 22.1 20.2 109
Larsen Creek 9000 -M .0 * 27.0 20.0 135
Loomis Park 8240 .1 .0 * 25.7 25.9 99
New Fork Lake 8340 -M .0 * -M 19.3 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 25.9 20.6 126
Spring Creek Divide 9000 .3 .0 * 43.2 34.0 127
Triple Peak 8500 -M .0 * 38.7 37.2 104
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Basin Index (%) * 115
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 .0 * 23.0 19.6 117
Buck Pasture 9632 -M -M * 33.5 -M *
EF Blacks Fork GS 9360 .0 .0 * 26.0 22.4 116
Hams Fork 7840 -M .0 * 22.9 18.1 127
Henrys Fork 10182 -M -M * 27.2 -M *
Hewinta 9500 -M .0 * -M 24.0 *
Hickerson Park 9122 -M .0 * 22.0 19.7 112
Hole-in-Rock 9168 .1 .0 * 22.9 19.6 117
Indian Creek 9425 .2 .0 * 34.6 30.0 115
Kelley R.S. 8180 .1 .0 * 31.1 25.6 121
Spirit Lk 10235 .0 .0 * 35.3 28.3 125
Steel Creek Park 10158 .0 .0 * 32.7 28.1 116
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Basin Index (%) * 118
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 24.0 19.2 125
Bug Lake 7987 .1 .0 * 35.1 26.0 135
Burts Miller Ranch 8000 .1 .0 * 22.2 12.6 176
Chalk Creek #1 9171 .1 .0 * 42.2 34.2 123
Giveout 6930 .1 .0 * 23.8 20.2 118
Hayden Fork 9130 1.5 .0 * 39.1 32.6 120
Kelley R.S. 8180 .1 .0 * 31.1 25.6 121
Lily Lake 9133 .0 .0 * 26.1 25.2 104
Monte Cristo 8932 .0 .0 * 49.4 35.6 139
Salt River Summit 7640 -M .0 * 28.3 24.0 118
Spring Creek Divide 9000 .3 .0 * 43.2 34.0 127
Trial Lake 9992 1.0 .0 * -M 34.4 *
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Basin Index (%) * 126
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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.
