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: SEPTEMBER 5 , 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 30.2 103
Blind Bull Sum 8650 -M .0 * 30.5 27.2 112
Cottonwood Creek 7670 .1 .0 * 45.3 37.5 121
East Rim Divide 7930 -M .0 * 22.9 18.4 124
Grand Targhee 9260 -M .0 * 46.6 47.0 99
Granite Creek 6770 .0 .0 * 23.4 29.4 80
Grassy Lake 7265 -M .0 * 54.3 49.3 110
Gros Ventre Summit 8750 .0 .0 * 22.2 20.7 107
Gunsight Pass 9820 .2 .0 * 27.2 23.4 116
Lewis Lake Divide 7850 -M .0 * -M 46.8 *
Loomis Park 8240 .2 .0 * 26.6 25.9 103
Phillips Bench 8200 .2 .0 * 40.0 38.8 103
Salt River Summit 7640 .0 .0 * 28.5 24.2 118
Snake River Station 6920 .0 .0 * 33.5 33.0 102
Somsen Ranch 6800 -M .0 * 33.5 25.4 132
Spring Creek Divide 9000 .1 .0 * 43.9 34.1 129
Thumb Divide 7980 .2 .0 * 32.1 27.0 119
Togwotee Pass 9580 .0 .0 * 34.8 35.6 98
Triple Peak 8500 -M .0 * 39.4 37.2 106
Two Ocean Plateau 9240 1.0 .0 * 41.8 39.9 105
Willow Creek 8080 .0 .0 * 53.1 49.4 107
Younts Peak 8350 -M .0 * -M 26.0 *
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Basin Index (%) * 109
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .2 .0 * 58.2 52.0 112
Canyon 7870 .0 -M * 29.0 -M *
Madison Plateau 7750 .0 .0 * 43.9 38.8 113
West Yellowstone 6700 .0 .0 * 29.2 23.3 125
Whiskey Creek 6800 .0 .0 * 39.8 31.8 125
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Basin Index (%) * 117
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 31.0 32.7 95
Canyon 7870 .0 -M * 29.0 -M *
Evening Star 9200 .0 .0 * 42.8 41.8 102
Fisher Creek 9100 .0 .0 * 51.5 49.6 104
Monument Peak 8850 .1 .0 * 40.2 36.2 111
Northeast Entrance 7350 .1 .0 * 24.9 23.1 108
Parker Peak 9400 .0 .0 * 37.8 31.2 121
Sylvan Lake 8420 .0 .0 * 38.5 37.0 104
Thumb Divide 7980 .2 .0 * 32.1 27.0 119
Two Ocean Plateau 9240 1.0 .0 * 41.8 39.9 105
White Mill 8700 .0 .0 * 36.6 37.2 98
Wolverine 7650 .0 .0 * 21.2 21.2 100
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Basin Index (%) * 106
WIND RIVER
Burroughs Creek 8750 .0 -M * 25.2 -M *
Castle Creek 8400 .2 .0 * 20.6 16.2 127
Cold Springs 9630 .1 .0 * 24.7 19.5 127
Deer Park 9700 .0 .0 * 40.4 28.7 141
Hobbs Park 10100 .1 .0 * 34.4 25.6 134
Kirwin 9550 .0 .0 * 33.0 25.3 130
Little Warm 9370 .0 .0 * 27.9 22.8 122
South Pass 9040 .0 .0 * 34.2 25.0 137
St. Lawrence Alt 8620 .0 -M * 27.5 -M *
Togwotee Pass 9580 .0 .0 * 34.8 35.6 98
Townsend Creek 8700 .2 .0 * 30.2 23.7 127
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Basin Index (%) * 126
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 36.4 29.1 125
Bear Trap Meadow 8200 .1 .0 * -M 19.0 *
Bone Springs Div 9350 .0 .0 * -M 28.3 *
Grave Springs 8550 .0 .0 * -M 18.2 *
Kirwin 9550 .0 .0 * 33.0 25.3 130
Marquette 8760 .0 .0 * 29.9 23.8 126
Middle Powder 7760 .1 .0 * 27.9 19.8 141
Owl Creek 8975 .0 .0 * 27.1 16.6 163
Powder River Pass 9480 .0 .0 * 30.4 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 (%) * 130
SHOSHONE RIVER
Blackwater 9780 .1 .0 * -M 34.7 *
Evening Star 9200 .0 .0 * 42.8 41.8 102
Marquette 8760 .0 .0 * 29.9 23.8 126
Sylvan Lake 8420 .0 .0 * 38.5 37.0 104
Sylvan Road 7120 .0 .0 * 25.7 25.6 100
Younts Peak 8350 -M .0 * -M 26.0 *
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Basin Index (%) * 107
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * -M 19.0 *
Cloud Peak Reservoir 9860 .0 .0 * 37.7 28.3 133
Grave Springs 8550 .0 .0 * -M 18.2 *
Hansen Sawmill 8360 .0 .0 * 29.0 21.4 136
Middle Powder 7760 .1 .0 * 27.9 19.8 141
Powder River Pass 9480 .0 .0 * 30.4 26.0 117
Soldier Park 8720 .3 .0 * 28.0 21.0 133
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Basin Index (%) * 131
TONGUE RIVER
Big Goose 7990 .2 .0 * -M 23.6 *
Bone Springs Div 9350 .0 .0 * -M 28.3 *
Burgess Junction 7880 .1 .0 * -M 23.9 *
Dome Lake 8880 .0 .0 * 32.0 27.1 118
Little Goose 8870 .0 .0 * 34.4 25.8 133
Sucker Creek 8880 .0 .0 * -M 28.3 *
Tie Creek 6870 .0 .0 * -M 25.0 *
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Basin Index (%) * 126*
BELLE FOURCHE
Blind Park 6890 .0 .0 * 26.0 26.3 99
Cole Canyon 5910 .1 .0 * -M 24.1 *
North Rapid Creek 6130 .0 .0 * 26.2 22.6 116
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Basin Index (%) * 107
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 26.0 26.3 99
North Rapid Creek 6130 .0 .0 * 26.2 22.6 116
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Basin Index (%) * 107
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 38.3 35.2 109
Blackhall Mtn 9839 .1 .0 * 47.5 42.7 111
Cinnabar Park 9707 .1 .0 * 35.0 33.7 104
Columbine 9167 -M .0 * 35.3 36.1 98
Divide Peak 8730 .1 .0 * 36.8 30.0 123
Joe Wright 10158 .0 .0 * 41.6 41.0 101
Laprele Creek 8390 .1 .0 * 26.2 21.4 122
Med Bow 10512 .1 -M * 49.0 -M *
Never Summer 10323 -M .0 * 35.3 30.4 116
North French Creek 10153 .0 .0 * 42.9 41.0 105
Old Battle 9860 .0 .0 * 54.6 48.0 114
Rawah 9069 -M .0 * 29.8 26.8 111
Sage Creek Basin 7850 .2 .0 * 26.2 20.3 129
Sand Lake 10098 .1 .0 * 41.6 39.0 107
South Brush Creek 8495 -M .0 * 23.3 23.6 99
Tower 10620 .1 .0 * 63.8 55.6 115
Webber Springs 9260 .1 .0 * 39.6 38.2 104
Whiskey Park 9020 .0 .0 * 43.8 39.8 110
Willow Creek Pass 9523 .0 .0 * 28.2 24.2 117
Zirkel 9338 .1 .0 * 44.9 41.4 108
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Basin Index (%) * 110
SWEETWATER
Deer Park 9700 .0 .0 * 40.4 28.7 141
Larsen Creek 9000 -M .0 * 28.1 20.2 139
South Pass 9040 .0 .0 * 34.2 25.0 137
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Basin Index (%) * 139
LOWER N. PLATTE
Casper Mtn. 7920 .1 .0 * 32.0 24.2 132
Laprele Creek 8390 .1 .0 * 26.2 21.4 122
Reno Hill 8430 .0 .0 * 32.9 27.4 120
Windy Peak 7915 .2 .0 * 22.6 21.6 105
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Basin Index (%) * 120
LARAMIE RIVER
Brooklyn Lake 10250 .1 .0 * 37.5 33.6 112
Cinnabar Park 9707 .1 .0 * 35.0 33.7 104
Crow Creek 8335 .0 .0 * 22.0 22.8 96
Deadman Hill 10239 .0 .0 * 34.3 29.2 117
Rawah 9069 -M .0 * 29.8 26.8 111
Roach 9740 .1 .0 * 34.4 31.3 110
Windy Peak 7915 .2 .0 * 22.6 21.6 105
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Basin Index (%) * 108
S. PLATTE
Crow Creek 8335 .0 .0 * 22.0 22.8 96
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Basin Index (%) * 96
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 28.5 22.6 126
Divide Peak 8730 .1 .0 * 36.8 30.0 123
Elk River 8739 .1 .0 * 38.4 29.2 132
Elkhead Divide 8800 .0 -M * 40.6 -M *
Little Snake River 8928 .0 .0 * 54.1 46.0 118
Old Battle 9860 .0 .0 * 54.6 48.0 114
Sage Creek Basin 7850 .2 .0 * 26.2 20.3 129
Sandstone RS 8152 -M .0 * 32.2 26.0 124
Whiskey Park 9020 .0 .0 * 43.8 39.8 110
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Basin Index (%) * 120
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 27.5 21.3 129
Blind Bull Sum 8650 -M .0 * 30.5 27.2 112
East Rim Divide 7930 -M .0 * 22.9 18.4 124
Elkhart Park G.S. 9400 -M .0 * 25.9 22.1 117
Gros Ventre Summit 8750 .0 .0 * 22.2 20.7 107
Gunsight Pass 9820 .2 .0 * 27.2 23.4 116
Indian Creek 9425 .2 .0 * 35.2 30.2 117
Kendall R.S. 7740 .1 .0 * 22.9 20.2 113
Larsen Creek 9000 -M .0 * 28.1 20.2 139
Loomis Park 8240 .2 .0 * 26.6 25.9 103
New Fork Lake 8340 -M .0 * -M 19.3 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 26.2 20.6 127
Spring Creek Divide 9000 .1 .0 * 43.9 34.1 129
Triple Peak 8500 -M .0 * 39.4 37.2 106
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Basin Index (%) * 118
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 .0 * 23.6 19.6 120
Buck Pasture 9632 -M -M * 34.1 -M *
EF Blacks Fork GS 9360 .0 .0 * 26.7 22.4 119
Hams Fork 7840 -M .0 * 23.5 18.2 129
Henrys Fork 10182 -M -M * 28.1 -M *
Hewinta 9500 -M .0 * -M 24.0 *
Hickerson Park 9122 1.7 .0 * 22.6 20.0 113
Hole-in-Rock 9168 .0 .0 * 23.5 19.7 119
Indian Creek 9425 .2 .0 * 35.2 30.2 117
Kelley R.S. 8180 .2 .0 * 31.6 25.7 123
Spirit Lk 10235 .0 .0 * 36.3 28.5 127
Steel Creek Park 10158 .0 .0 * 33.6 28.2 119
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Basin Index (%) * 121
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 24.5 19.3 127
Bug Lake 7987 .0 .0 * 36.0 26.2 137
Burts Miller Ranch 8000 .1 .0 * 22.9 12.6 182
Chalk Creek #1 9171 .1 .0 * 43.6 34.6 126
Giveout 6930 .0 .0 * 24.0 20.2 119
Hayden Fork 9130 1.4 .0 * 40.5 32.7 124
Kelley R.S. 8180 .2 .0 * 31.6 25.7 123
Lily Lake 9133 .0 .0 * 26.9 25.4 106
Monte Cristo 8932 .0 .0 * 50.8 35.6 143
Salt River Summit 7640 .0 .0 * 28.5 24.2 118
Spring Creek Divide 9000 .1 .0 * 43.9 34.1 129
Trial Lake 9992 1.0 .0 * -M 34.4 *
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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.
