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 TUESDAY: AUGUST 15 , 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 * 29.7 28.8 103
Blind Bull Sum 8650 .0 .0 * 29.0 26.4 110
Cottonwood Creek 7670 .0 .0 * 42.2 36.4 116
East Rim Divide 7930 -M .0 * 19.9 18.0 111
Grand Targhee 9260 -M .0 * 43.0 46.4 93
Granite Creek 6770 -M .0 * 21.4 28.2 76
Grassy Lake 7265 -M .0 * 50.7 47.6 107
Gros Ventre Summit 8750 .0 .0 * 20.3 19.8 103
Gunsight Pass 9820 .1 .0 * 25.1 21.6 116
Lewis Lake Divide 7850 -M .0 * 50.7 44.8 113
Loomis Park 8240 .1 .0 * 24.9 25.0 100
Phillips Bench 8200 .2 .0 * 39.1 36.5 107
Salt River Summit 7640 -M .0 * 27.8 23.4 119
Snake River Station 6920 -M .0 * 31.0 31.9 97
Somsen Ranch 6800 -M .0 * 31.2 24.6 127
Spring Creek Divide 9000 .4 .0 * 42.1 33.2 127
Thumb Divide 7980 .0 .0 * 28.9 26.6 109
Togwotee Pass 9580 .0 .0 * 33.8 35.2 96
Triple Peak 8500 -M .0 * 38.2 36.8 104
Two Ocean Plateau 9240 .8 .0 * 40.0 39.0 103
Willow Creek 8080 .0 .0 * 49.0 47.8 103
Younts Peak 8350 .0 .0 * 24.9 24.2 103
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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 * 40.5 36.7 110
West Yellowstone 6700 .0 .0 * 26.5 22.4 118
Whiskey Creek 6800 .0 .0 * 37.1 30.8 120
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Basin Index (%) * 113
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 29.9 32.2 93
Canyon 7870 .0 -M * 27.0 -M *
Evening Star 9200 .0 .0 * 40.9 41.0 100
Fisher Creek 9100 .0 .0 * 48.5 48.2 101
Monument Peak 8850 .0 .0 * 37.5 35.2 107
Northeast Entrance 7350 .1 .0 * 22.6 22.4 101
Parker Peak 9400 .0 .0 * 36.1 30.2 120
Sylvan Lake 8420 .0 .0 * 35.4 35.5 100
Thumb Divide 7980 .0 .0 * 28.9 26.6 109
Two Ocean Plateau 9240 .8 .0 * 40.0 39.0 103
White Mill 8700 .0 .0 * 34.2 35.9 95
Wolverine 7650 .0 .0 * 20.4 20.6 99
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Basin Index (%) * 102
WIND RIVER
Burroughs Creek 8750 .0 -M * 24.2 -M *
Castle Creek 8400 .0 .0 * 19.5 15.8 123
Cold Springs 9630 .0 .0 * 23.6 19.0 124
Deer Park 9700 .0 .0 * 39.6 28.5 139
Hobbs Park 10100 .0 .0 * 33.0 25.4 130
Kirwin 9550 .0 .0 * 31.3 23.6 133
Little Warm 9370 .0 .0 * 26.4 20.7 128
South Pass 9040 .0 .0 * 33.2 24.6 135
St. Lawrence Alt 8620 .0 -M * 27.0 -M *
Togwotee Pass 9580 .0 .0 * 33.8 35.2 96
Townsend Creek 8700 .0 .0 * 29.4 23.0 128
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Basin Index (%) * 125
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 34.7 28.4 122
Bear Trap Meadow 8200 .0 .0 * 25.1 18.5 136
Bone Springs Div 9350 .0 .0 * 27.9 27.0 103
Grave Springs 8550 .0 .0 * 23.7 17.4 136
Kirwin 9550 .0 .0 * 31.3 23.6 133
Marquette 8760 .0 .0 * 28.5 22.4 127
Middle Powder 7760 .0 .0 * 25.0 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 24.8 114
Timber Creek 7950 .0 .0 * 26.4 19.3 137
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Basin Index (%) * 126
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 37.7 33.4 113
Evening Star 9200 .0 .0 * 40.9 41.0 100
Marquette 8760 .0 .0 * 28.5 22.4 127
Sylvan Lake 8420 .0 .0 * 35.4 35.5 100
Sylvan Road 7120 .0 .0 * 23.6 24.9 95
Younts Peak 8350 .0 .0 * 24.9 24.2 103
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Basin Index (%) * 105
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 25.1 18.5 136
Cloud Peak Reservoir 9860 .0 .0 * 35.2 27.5 128
Grave Springs 8550 .0 .0 * 23.7 17.4 136
Hansen Sawmill 8360 .0 .0 * 27.8 20.4 136
Middle Powder 7760 .0 .0 * 25.0 19.8 126
Powder River Pass 9480 .0 .0 * 29.1 25.1 116
Soldier Park 8720 .0 .0 * 26.5 20.0 132
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Basin Index (%) * 129
TONGUE RIVER
Big Goose 7990 .0 .0 * 31.1 22.8 136
Bone Springs Div 9350 .0 .0 * 27.9 27.0 103
Burgess Junction 7880 .0 .0 * 30.2 23.0 131
Dome Lake 8880 .0 .0 * 31.5 26.2 120
Little Goose 8870 .0 .0 * 32.6 25.0 130
Sucker Creek 8880 .0 .0 * 34.6 27.6 125
Tie Creek 6870 .0 .0 * 31.5 24.0 131
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Basin Index (%) * 125
BELLE FOURCHE
Blind Park 6890 .0 .0 * 26.1 25.2 104
Cole Canyon 5910 .1 .0 * 28.4 22.4 127
North Rapid Creek 6130 .0 .0 * 26.0 22.1 118
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Basin Index (%) * 115
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 26.1 25.2 104
North Rapid Creek 6130 .0 .0 * 26.0 22.1 118
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Basin Index (%) * 110
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 34.6 34.0 102
Blackhall Mtn 9839 -M .0 * 46.6 42.2 110
Cinnabar Park 9707 -M .0 * -M 33.2 *
Columbine 9167 -M .0 * 33.6 35.0 96
Divide Peak 8730 -M .0 * 36.1 29.4 123
Joe Wright 10158 -M .0 * 39.6 39.4 101
Laprele Creek 8390 .0 .0 * 24.6 20.1 122
Med Bow 10512 -M -M * -M -M *
Never Summer 10323 -M .0 * 32.9 29.3 112
North French Creek 10153 .0 .0 * 40.7 40.8 100
Old Battle 9860 .1 .0 * 52.2 47.4 110
Rawah 9069 .0 .0 * 27.2 25.7 106
Sage Creek Basin 7850 -M .0 * 25.9 18.4 141
Sand Lake 10098 -M .0 * -M 38.8 *
South Brush Creek 8495 .0 .0 * 22.8 23.0 99
Tower 10620 .0 .0 * 60.4 55.2 109
Webber Springs 9260 .0 .0 * 37.4 37.4 100
Whiskey Park 9020 -M .0 * 42.6 38.7 110
Willow Creek Pass 9523 .0 .0 * 25.4 23.4 109
Zirkel 9338 .0 .0 * 43.0 39.6 109
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Basin Index (%) * 108
SWEETWATER
Deer Park 9700 .0 .0 * 39.6 28.5 139
Larsen Creek 9000 -M .0 * 26.1 19.9 131
South Pass 9040 .0 .0 * 33.2 24.6 135
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Basin Index (%) * 135
LOWER N. PLATTE
Casper Mtn. 7920 -M .0 * -M 23.3 *
Laprele Creek 8390 .0 .0 * 24.6 20.1 122
Reno Hill 8430 -M .0 * 31.3 27.1 115
Windy Peak 7915 -M .0 * 21.5 20.6 104
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Basin Index (%) * 114
LARAMIE RIVER
Brooklyn Lake 10250 -M .0 * 35.5 32.8 108
Cinnabar Park 9707 -M .0 * -M 33.2 *
Crow Creek 8335 .0 .0 * 19.8 22.0 90
Deadman Hill 10239 .0 .0 * 32.3 28.6 113
Rawah 9069 .0 .0 * 27.2 25.7 106
Roach 9740 .0 .0 * 31.7 30.2 105
Windy Peak 7915 -M .0 * 21.5 20.6 104
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Basin Index (%) * 105
S. PLATTE
Crow Creek 8335 .0 .0 * 19.8 22.0 90
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Basin Index (%) * 90
LITTLE SNAKE RIVER
Battle Mountain 7498 -M .0 * 27.6 21.8 127
Divide Peak 8730 -M .0 * 36.1 29.4 123
Elk River 8739 -M .0 * 36.2 28.2 128
Elkhead Divide 8800 .0 -M * 38.4 -M *
Little Snake River 8928 -M .0 * 53.2 44.6 119
Old Battle 9860 .1 .0 * 52.2 47.4 110
Sage Creek Basin 7850 -M .0 * 25.9 18.4 141
Sandstone RS 8152 -M .0 * 31.5 24.9 127
Whiskey Park 9020 -M .0 * 42.6 38.7 110
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Basin Index (%) * 120
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 25.4 20.5 124
Blind Bull Sum 8650 .0 .0 * 29.0 26.4 110
East Rim Divide 7930 -M .0 * 19.9 18.0 111
Elkhart Park G.S. 9400 -M .0 * 23.8 21.4 111
Gros Ventre Summit 8750 .0 .0 * 20.3 19.8 103
Gunsight Pass 9820 .1 .0 * 25.1 21.6 116
Indian Creek 9425 .2 .0 * 34.0 29.4 116
Kendall R.S. 7740 .0 .0 * 21.2 19.8 107
Larsen Creek 9000 -M .0 * 26.1 19.9 131
Loomis Park 8240 .1 .0 * 24.9 25.0 100
New Fork Lake 8340 -M .0 * -M 18.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 24.2 20.2 120
Spring Creek Divide 9000 .4 .0 * 42.1 33.2 127
Triple Peak 8500 -M .0 * 38.2 36.8 104
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Basin Index (%) * 114
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 .0 * 21.3 19.2 111
Buck Pasture 9632 .0 -M * 31.0 -M *
EF Blacks Fork GS 9360 .0 .0 * 23.0 21.0 110
Hams Fork 7840 -M .0 * 22.5 17.4 129
Henrys Fork 10182 -M -M * 25.1 -M *
Hewinta 9500 .0 .0 * 23.9 22.8 105
Hickerson Park 9122 .0 .0 * 21.0 18.5 114
Hole-in-Rock 9168 .0 .0 * 21.2 18.9 112
Indian Creek 9425 .2 .0 * 34.0 29.4 116
Kelley R.S. 8180 .0 .0 * 30.4 25.2 121
Spirit Lk 10235 .0 .0 * 32.8 26.6 123
Steel Creek Park 10158 .0 .0 * 29.7 25.9 115
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Basin Index (%) * 116
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 22.2 17.6 126
Bug Lake 7987 .1 .0 * 34.2 25.2 136
Burts Miller Ranch 8000 .1 .0 * 19.9 10.9 183
Chalk Creek #1 9171 .0 .0 * 39.9 32.9 121
Giveout 6930 .0 .0 * 23.0 20.0 115
Hayden Fork 9130 -M .0 * 36.3 30.4 119
Kelley R.S. 8180 .0 .0 * 30.4 25.2 121
Lily Lake 9133 .0 .0 * 24.1 24.1 100
Monte Cristo 8932 .0 .0 * 48.4 34.3 141
Salt River Summit 7640 -M .0 * 27.8 23.4 119
Spring Creek Divide 9000 .4 .0 * 42.1 33.2 127
Trial Lake 9992 .0 .0 * 43.4 32.4 134
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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.
