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 FRIDAY: AUGUST 18 , 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 * 29.6 28.8 103
Blind Bull Sum 8650 .0 .0 * 29.1 26.4 110
Cottonwood Creek 7670 .0 .0 * 42.5 36.4 117
East Rim Divide 7930 -M .0 * 21.0 18.0 117
Grand Targhee 9260 -M .0 * 42.9 46.4 92
Granite Creek 6770 -M .0 * 21.8 28.3 77
Grassy Lake 7265 -M .0 * 50.8 47.6 107
Gros Ventre Summit 8750 .1 .0 * 20.2 20.0 101
Gunsight Pass 9820 .2 .0 * 25.2 22.0 115
Lewis Lake Divide 7850 .0 .0 * 50.7 45.2 112
Loomis Park 8240 .1 .0 * 24.9 25.2 99
Phillips Bench 8200 .2 .0 * 39.3 37.0 106
Salt River Summit 7640 -M .0 * 27.9 23.4 119
Snake River Station 6920 -M .0 * 31.0 32.0 97
Somsen Ranch 6800 -M .0 * 31.5 24.8 127
Spring Creek Divide 9000 .4 .0 * 42.3 33.5 126
Thumb Divide 7980 .0 .0 * 28.9 26.6 109
Togwotee Pass 9580 .0 .0 * 33.9 35.2 96
Triple Peak 8500 -M .0 * 38.3 36.8 104
Two Ocean Plateau 9240 1.0 .0 * 39.9 39.1 102
Willow Creek 8080 .1 .0 * 49.5 48.0 103
Younts Peak 8350 .0 .0 * 25.2 24.4 103
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Basin Index (%) * 106
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .0 * 54.8 51.1 107
Canyon 7870 .0 -M * 27.0 -M *
Madison Plateau 7750 .0 .0 * 40.4 36.7 110
West Yellowstone 6700 .0 .0 * 26.1 22.5 116
Whiskey Creek 6800 .0 .0 * 37.0 30.8 120
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Basin Index (%) * 112
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 30.2 32.2 94
Canyon 7870 .0 -M * 27.0 -M *
Evening Star 9200 .0 .0 * 40.8 41.0 100
Fisher Creek 9100 .0 .0 * 48.6 48.4 100
Monument Peak 8850 .0 .0 * 37.4 35.2 106
Northeast Entrance 7350 .1 .0 * 22.6 22.4 101
Parker Peak 9400 .0 .0 * 36.1 30.3 119
Sylvan Lake 8420 .0 .0 * -M 35.5 *
Thumb Divide 7980 .0 .0 * 28.9 26.6 109
Two Ocean Plateau 9240 1.0 .0 * 39.9 39.1 102
White Mill 8700 .0 .0 * 34.1 36.0 95
Wolverine 7650 .1 .0 * 20.3 20.6 99
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Basin Index (%) * 102
WIND RIVER
Burroughs Creek 8750 .0 -M * 24.1 -M *
Castle Creek 8400 .1 .0 * 19.4 15.8 123
Cold Springs 9630 .1 .0 * 23.5 19.0 124
Deer Park 9700 .0 .0 * 39.6 28.5 139
Hobbs Park 10100 .0 .0 * 32.8 25.4 129
Kirwin 9550 .0 .0 * -M 23.7 *
Little Warm 9370 .0 .0 * 26.5 21.1 126
South Pass 9040 .0 .0 * 33.3 24.6 135
St. Lawrence Alt 8620 .1 -M * 26.8 -M *
Togwotee Pass 9580 .0 .0 * 33.9 35.2 96
Townsend Creek 8700 .0 .0 * 29.4 23.4 126
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Basin Index (%) * 124
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 34.7 28.8 120
Bear Trap Meadow 8200 .0 .0 * 25.1 18.8 134
Bone Springs Div 9350 .0 .0 * 27.9 27.4 102
Grave Springs 8550 .1 .0 * 23.7 17.8 133
Kirwin 9550 .0 .0 * -M 23.7 *
Marquette 8760 .0 .0 * 28.6 22.4 128
Middle Powder 7760 .0 .0 * 24.9 19.8 126
Owl Creek 8975 .0 .0 * 25.1 15.6 161
Powder River Pass 9480 .0 .0 * 29.1 25.1 116
Shell Creek 9580 .0 .0 * 28.3 25.0 113
Timber Creek 7950 .0 .0 * -M 19.4 *
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Basin Index (%) * 123
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 38.0 33.6 113
Evening Star 9200 .0 .0 * 40.8 41.0 100
Marquette 8760 .0 .0 * 28.6 22.4 128
Sylvan Lake 8420 .0 .0 * -M 35.5 *
Sylvan Road 7120 .0 .0 * -M 24.9 *
Younts Peak 8350 .0 .0 * 25.2 24.4 103
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Basin Index (%) * 109
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 25.1 18.8 134
Cloud Peak Reservoir 9860 .0 .0 * 35.3 27.5 128
Grave Springs 8550 .1 .0 * 23.7 17.8 133
Hansen Sawmill 8360 .0 .0 * 28.1 21.0 134
Middle Powder 7760 .0 .0 * 24.9 19.8 126
Powder River Pass 9480 .0 .0 * 29.1 25.1 116
Soldier Park 8720 .0 .0 * 26.4 20.2 131
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Basin Index (%) * 128
TONGUE RIVER
Big Goose 7990 .0 .0 * 30.9 23.0 134
Bone Springs Div 9350 .0 .0 * 27.9 27.4 102
Burgess Junction 7880 .0 .0 * 30.2 23.4 129
Dome Lake 8880 .0 .0 * 32.0 26.6 120
Little Goose 8870 .0 .0 * 32.5 25.1 129
Sucker Creek 8880 .0 .0 * 34.6 27.8 124
Tie Creek 6870 .0 .0 * 31.5 24.2 130
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Basin Index (%) * 124
BELLE FOURCHE
Blind Park 6890 .0 .0 * 25.9 25.9 100
Cole Canyon 5910 .2 .0 * 28.3 22.4 126
North Rapid Creek 6130 .0 .0 * 25.6 22.2 115
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Basin Index (%) * 113
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 25.9 25.9 100
North Rapid Creek 6130 .0 .0 * 25.6 22.2 115
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Basin Index (%) * 107
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 34.6 34.3 101
Blackhall Mtn 9839 -M .0 * -M 42.2 *
Cinnabar Park 9707 -M .0 * -M 33.3 *
Columbine 9167 -M .0 * 33.7 35.2 96
Divide Peak 8730 -M .0 * -M 29.5 *
Joe Wright 10158 -M .0 * 39.4 39.6 99
Laprele Creek 8390 -M .0 * -M 20.1 *
Med Bow 10512 -M -M * -M -M *
Never Summer 10323 -M .0 * 32.9 29.4 112
North French Creek 10153 -M .0 * -M 40.8 *
Old Battle 9860 -M .0 * -M 47.4 *
Rawah 9069 .0 .0 * 27.1 25.9 105
Sage Creek Basin 7850 -M .0 * -M 18.5 *
Sand Lake 10098 .3 .0 * -M 38.8 *
South Brush Creek 8495 .2 .0 * -M 23.0 *
Tower 10620 .0 .0 * 60.6 55.4 109
Webber Springs 9260 .0 .0 * -M 37.5 *
Whiskey Park 9020 -M .0 * -M 38.8 *
Willow Creek Pass 9523 .0 .0 * 25.3 23.4 108
Zirkel 9338 -M .0 * 43.0 39.7 108
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Basin Index (%) * 105*
SWEETWATER
Deer Park 9700 .0 .0 * 39.6 28.5 139
Larsen Creek 9000 -M .0 * 26.2 19.9 132
South Pass 9040 .0 .0 * 33.3 24.6 135
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Basin Index (%) * 136
LOWER N. PLATTE
Casper Mtn. 7920 -M .0 * -M 23.3 *
Laprele Creek 8390 -M .0 * -M 20.1 *
Reno Hill 8430 .0 .0 * -M 27.2 *
Windy Peak 7915 -M .0 * -M 20.9 *
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Basin Index (%) * *
LARAMIE RIVER
Brooklyn Lake 10250 -M .0 * -M 33.0 *
Cinnabar Park 9707 -M .0 * -M 33.3 *
Crow Creek 8335 -M .0 * -M 22.1 *
Deadman Hill 10239 -M .0 * 32.2 28.8 112
Rawah 9069 .0 .0 * 27.1 25.9 105
Roach 9740 -M .0 * 31.6 30.5 104
Windy Peak 7915 -M .0 * -M 20.9 *
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Basin Index (%) * 107*
S. PLATTE
Crow Creek 8335 -M .0 * -M 22.1 *
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Basin Index (%) * *
LITTLE SNAKE RIVER
Battle Mountain 7498 .4 .0 * -M 21.8 *
Divide Peak 8730 -M .0 * -M 29.5 *
Elk River 8739 -M .0 * 36.1 28.2 128
Elkhead Divide 8800 .1 -M * 38.4 -M *
Little Snake River 8928 -M .0 * -M 44.6 *
Old Battle 9860 -M .0 * -M 47.4 *
Sage Creek Basin 7850 -M .0 * -M 18.5 *
Sandstone RS 8152 .0 .0 * -M 25.1 *
Whiskey Park 9020 -M .0 * -M 38.8 *
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Basin Index (%) * 128*
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 25.3 20.6 123
Blind Bull Sum 8650 .0 .0 * 29.1 26.4 110
East Rim Divide 7930 -M .0 * 21.0 18.0 117
Elkhart Park G.S. 9400 -M .0 * 23.8 21.6 110
Gros Ventre Summit 8750 .1 .0 * 20.2 20.0 101
Gunsight Pass 9820 .2 .0 * 25.2 22.0 115
Indian Creek 9425 .2 .0 * 34.0 29.5 115
Kendall R.S. 7740 .1 .0 * 21.3 19.8 108
Larsen Creek 9000 -M .0 * 26.2 19.9 132
Loomis Park 8240 .1 .0 * 24.9 25.2 99
New Fork Lake 8340 -M .0 * -M 18.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 24.2 20.2 120
Spring Creek Divide 9000 .4 .0 * 42.3 33.5 126
Triple Peak 8500 -M .0 * 38.3 36.8 104
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Basin Index (%) * 113
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 .0 * 22.1 19.2 115
Buck Pasture 9632 .0 -M * 31.5 -M *
EF Blacks Fork GS 9360 .0 .0 * 24.0 21.0 114
Hams Fork 7840 -M .0 * 22.6 17.4 130
Henrys Fork 10182 -M -M * 25.0 -M *
Hewinta 9500 .0 .0 * 25.4 23.0 110
Hickerson Park 9122 .0 .0 * 20.8 18.6 112
Hole-in-Rock 9168 .1 .0 * 21.4 19.0 113
Indian Creek 9425 .2 .0 * 34.0 29.5 115
Kelley R.S. 8180 .1 .0 * 30.5 25.2 121
Spirit Lk 10235 .0 .0 * 32.8 27.0 121
Steel Creek Park 10158 .0 .0 * 30.4 26.2 116
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Basin Index (%) * 117
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 22.6 17.6 128
Bug Lake 7987 .1 .0 * 34.2 25.2 136
Burts Miller Ranch 8000 .1 .0 * 20.4 10.9 187
Chalk Creek #1 9171 .0 .0 * 40.0 33.0 121
Giveout 6930 .3 .0 * 23.3 20.0 116
Hayden Fork 9130 -M .0 * 36.4 30.6 119
Kelley R.S. 8180 .1 .0 * 30.5 25.2 121
Lily Lake 9133 .0 .0 * 24.2 24.6 98
Monte Cristo 8932 .0 .0 * 48.4 34.4 141
Salt River Summit 7640 -M .0 * 27.9 23.4 119
Spring Creek Divide 9000 .4 .0 * 42.3 33.5 126
Trial Lake 9992 .0 .0 * 44.5 32.4 137
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Basin Index (%) * 127
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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.
