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: AUGUST 24 , 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 29.4 103
Blind Bull Sum 8650 -M .0 * -M 26.8 *
Cottonwood Creek 7670 .0 .0 * 43.1 36.8 117
East Rim Divide 7930 -M .0 * -M 18.4 *
Grand Targhee 9260 -M .0 * -M 46.6 *
Granite Creek 6770 -M .0 * -M 28.9 *
Grassy Lake 7265 -M .0 * -M 47.8 *
Gros Ventre Summit 8750 .1 .0 * 20.8 20.3 102
Gunsight Pass 9820 .2 .0 * 25.6 22.6 113
Lewis Lake Divide 7850 -M .0 * -M 45.8 *
Loomis Park 8240 .1 .0 * -M 25.6 *
Phillips Bench 8200 .2 .0 * -M 37.9 *
Salt River Summit 7640 -M .0 * 28.4 23.4 121
Snake River Station 6920 -M .0 * -M 32.2 *
Somsen Ranch 6800 -M .0 * 32.1 24.8 129
Spring Creek Divide 9000 .3 .0 * 42.8 33.6 127
Thumb Divide 7980 .1 .0 * -M 26.8 *
Togwotee Pass 9580 -M .0 * -M 35.4 *
Triple Peak 8500 -M .0 * -M 36.8 *
Two Ocean Plateau 9240 .9 .0 * 40.4 39.2 103
Willow Creek 8080 .0 .0 * 50.2 48.6 103
Younts Peak 8350 .0 .0 * 25.6 25.4 101
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Basin Index (%) * 112*
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .1 .0 * 57.1 51.7 110
Canyon 7870 .0 -M * 28.0 -M *
Madison Plateau 7750 .0 .0 * 42.6 37.7 113
West Yellowstone 6700 .0 .0 * 28.2 23.0 123
Whiskey Creek 6800 .0 .0 * 38.7 31.6 122
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Basin Index (%) * 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 30.0 32.4 93
Canyon 7870 .0 -M * 28.0 -M *
Evening Star 9200 .0 .0 * 41.4 41.6 100
Fisher Creek 9100 .0 .0 * 50.1 49.2 102
Monument Peak 8850 .0 .0 * 38.7 35.8 108
Northeast Entrance 7350 .1 .0 * 23.9 22.4 107
Parker Peak 9400 .0 .0 * 36.7 31.0 118
Sylvan Lake 8420 .0 .0 * -M 35.7 *
Thumb Divide 7980 .1 .0 * -M 26.8 *
Two Ocean Plateau 9240 .9 .0 * 40.4 39.2 103
White Mill 8700 .0 .0 * 35.6 36.2 98
Wolverine 7650 .0 .0 * 20.6 20.7 100
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Basin Index (%) * 103
WIND RIVER
Burroughs Creek 8750 .0 -M * 24.6 -M *
Castle Creek 8400 .0 .0 * 20.0 15.8 127
Cold Springs 9630 .0 .0 * 23.9 19.2 124
Deer Park 9700 .0 .0 * 39.8 28.5 140
Hobbs Park 10100 .0 .0 * 33.7 25.4 133
Kirwin 9550 .0 .0 * -M 24.4 *
Little Warm 9370 .0 .0 * 27.0 22.4 121
South Pass 9040 .0 .0 * 33.6 24.8 135
St. Lawrence Alt 8620 .0 -M * 27.0 -M *
Togwotee Pass 9580 -M .0 * -M 35.4 *
Townsend Creek 8700 .0 .0 * 29.5 23.5 126
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Basin Index (%) * 130
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * -M 28.8 *
Bear Trap Meadow 8200 .0 .0 * 25.4 19.0 134
Bone Springs Div 9350 .0 .0 * 28.1 27.8 101
Grave Springs 8550 .1 .0 * 23.9 18.0 133
Kirwin 9550 .0 .0 * -M 24.4 *
Marquette 8760 .0 .0 * 29.1 23.2 125
Middle Powder 7760 .0 .0 * 25.3 19.8 128
Owl Creek 8975 .0 .0 * 25.5 15.8 161
Powder River Pass 9480 .0 .0 * 29.6 25.2 117
Shell Creek 9580 .0 .0 * 28.5 25.0 114
Timber Creek 7950 .0 .0 * -M 19.8 *
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Basin Index (%) * 124
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 37.6 33.9 111
Evening Star 9200 .0 .0 * 41.4 41.6 100
Marquette 8760 .0 .0 * 29.1 23.2 125
Sylvan Lake 8420 .0 .0 * -M 35.7 *
Sylvan Road 7120 .0 .0 * -M 25.4 *
Younts Peak 8350 .0 .0 * 25.6 25.4 101
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Basin Index (%) * 108
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 25.4 19.0 134
Cloud Peak Reservoir 9860 .0 .0 * -M 27.6 *
Grave Springs 8550 .1 .0 * 23.9 18.0 133
Hansen Sawmill 8360 .0 .0 * 28.2 21.0 134
Middle Powder 7760 .0 .0 * 25.3 19.8 128
Powder River Pass 9480 .0 .0 * 29.6 25.2 117
Soldier Park 8720 .0 .0 * 26.7 20.8 128
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Basin Index (%) * 129
TONGUE RIVER
Big Goose 7990 .0 .0 * -M 23.2 *
Bone Springs Div 9350 .0 .0 * 28.1 27.8 101
Burgess Junction 7880 .0 .0 * 30.3 23.6 128
Dome Lake 8880 .0 .0 * 31.8 26.6 120
Little Goose 8870 .0 .0 * 4.5 25.5 18
Sucker Creek 8880 .0 .0 * 34.6 28.0 124
Tie Creek 6870 .0 .0 * 31.6 24.4 130
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Basin Index (%) * 103
BELLE FOURCHE
Blind Park 6890 .0 .0 * 25.9 26.0 100
Cole Canyon 5910 .2 .0 * 28.4 23.8 119
North Rapid Creek 6130 .0 .0 * 26.0 22.5 116
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Basin Index (%) * 111
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 25.9 26.0 100
North Rapid Creek 6130 .0 .0 * 26.0 22.5 116
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Basin Index (%) * 107
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 35.4 34.4 103
Blackhall Mtn 9839 .0 .0 * 46.8 42.2 111
Cinnabar Park 9707 .0 .0 * 32.1 33.4 96
Columbine 9167 -M .0 * 33.8 35.6 95
Divide Peak 8730 -M .0 * -M 29.6 *
Joe Wright 10158 .0 .0 * 39.9 40.1 100
Laprele Creek 8390 .0 .0 * 24.7 20.9 118
Med Bow 10512 .1 -M * 48.1 -M *
Never Summer 10323 -M .0 * 33.1 29.6 112
North French Creek 10153 .0 .0 * 41.4 40.8 101
Old Battle 9860 -M .0 * -M 47.8 *
Rawah 9069 .0 .0 * 28.1 26.0 108
Sage Creek Basin 7850 .0 .0 * 26.1 19.5 134
Sand Lake 10098 .1 .0 * 40.7 38.8 105
South Brush Creek 8495 .2 .0 * 22.9 23.4 98
Tower 10620 .1 .0 * 61.1 55.4 110
Webber Springs 9260 .0 .0 * 37.9 37.6 101
Whiskey Park 9020 .1 .0 * 42.8 39.2 109
Willow Creek Pass 9523 .0 .0 * 25.6 23.8 108
Zirkel 9338 -M .0 * 43.0 41.0 105
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Basin Index (%) * 106
SWEETWATER
Deer Park 9700 .0 .0 * 39.8 28.5 140
Larsen Creek 9000 -M .0 * 26.7 20.0 134
South Pass 9040 .0 .0 * 33.6 24.8 135
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Basin Index (%) * 137
LOWER N. PLATTE
Casper Mtn. 7920 -M .0 * -M 23.3 *
Laprele Creek 8390 .0 .0 * 24.7 20.9 118
Reno Hill 8430 -M .0 * 31.4 27.3 115
Windy Peak 7915 .1 .0 * 21.7 21.0 103
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Basin Index (%) * 112
LARAMIE RIVER
Brooklyn Lake 10250 .0 .0 * 35.6 33.4 107
Cinnabar Park 9707 .0 .0 * 32.1 33.4 96
Crow Creek 8335 .0 .0 * -M 22.5 *
Deadman Hill 10239 -M .0 * 32.4 29.2 111
Rawah 9069 .0 .0 * 28.1 26.0 108
Roach 9740 .0 .0 * 32.1 31.0 104
Windy Peak 7915 .1 .0 * 21.7 21.0 103
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Basin Index (%) * 105
S. PLATTE
Crow Creek 8335 .0 .0 * -M 22.5 *
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Basin Index (%) * *
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 27.7 22.2 125
Divide Peak 8730 -M .0 * -M 29.6 *
Elk River 8739 -M .0 * 36.5 28.4 129
Elkhead Divide 8800 .1 -M * 38.5 -M *
Little Snake River 8928 .0 .0 * 53.3 45.2 118
Old Battle 9860 -M .0 * -M 47.8 *
Sage Creek Basin 7850 .0 .0 * 26.1 19.5 134
Sandstone RS 8152 .0 .0 * 31.8 25.4 125
Whiskey Park 9020 .1 .0 * 42.8 39.2 109
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Basin Index (%) * 121
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 26.4 20.9 126
Blind Bull Sum 8650 -M .0 * -M 26.8 *
East Rim Divide 7930 -M .0 * -M 18.4 *
Elkhart Park G.S. 9400 -M .0 * -M 21.7 *
Gros Ventre Summit 8750 .1 .0 * 20.8 20.3 102
Gunsight Pass 9820 .2 .0 * 25.6 22.6 113
Indian Creek 9425 .2 .0 * 34.4 29.6 116
Kendall R.S. 7740 .0 .0 * 21.7 19.9 109
Larsen Creek 9000 -M .0 * 26.7 20.0 134
Loomis Park 8240 .1 .0 * -M 25.6 *
New Fork Lake 8340 -M .0 * -M 18.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 24.6 20.2 122
Spring Creek Divide 9000 .3 .0 * 42.8 33.6 127
Triple Peak 8500 -M .0 * -M 36.8 *
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Basin Index (%) * 119
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 .0 * -M 19.4 *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 .0 .0 * -M 21.4 *
Hams Fork 7840 -M .0 * 22.9 17.6 130
Henrys Fork 10182 -M -M * 26.2 -M *
Hewinta 9500 -M .0 * -M 23.1 *
Hickerson Park 9122 .0 .0 * 21.6 19.2 112
Hole-in-Rock 9168 .1 .0 * 22.2 19.3 115
Indian Creek 9425 .2 .0 * 34.4 29.6 116
Kelley R.S. 8180 .1 .0 * 30.9 25.2 123
Spirit Lk 10235 .0 .0 * 33.8 27.0 125
Steel Creek Park 10158 .0 .0 * -M 27.0 *
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Basin Index (%) * 120
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 23.4 18.8 124
Bug Lake 7987 .0 .0 * 34.8 25.2 138
Burts Miller Ranch 8000 .1 .0 * 21.5 11.9 181
Chalk Creek #1 9171 .1 .0 * 41.8 33.6 124
Giveout 6930 .1 .0 * 23.8 20.0 119
Hayden Fork 9130 1.5 .0 * 38.2 31.6 121
Kelley R.S. 8180 .1 .0 * 30.9 25.2 123
Lily Lake 9133 .0 .0 * 25.5 24.8 103
Monte Cristo 8932 .0 .0 * 49.0 34.5 142
Salt River Summit 7640 -M .0 * 28.4 23.4 121
Spring Creek Divide 9000 .3 .0 * 42.8 33.6 127
Trial Lake 9992 .0 .0 * 45.6 33.0 138
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Basin Index (%) * 129
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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.
