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: SEPTEMBER 14 , 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 * 31.3 31.3 100
Blind Bull Sum 8650 .0 .0 * 30.6 27.6 111
Cottonwood Creek 7670 .0 .0 * 45.3 38.4 118
East Rim Divide 7930 -M .0 * 23.3 18.6 125
Grand Targhee 9260 -M .0 * 47.1 50.1 94
Granite Creek 6770 -M .0 * 23.5 29.4 80
Grassy Lake 7265 -M .0 * 54.5 50.0 109
Gros Ventre Summit 8750 .0 .0 * 22.3 21.4 104
Gunsight Pass 9820 .1 .0 * 27.3 24.2 113
Lewis Lake Divide 7850 .1 .0 * -M 48.0 *
Loomis Park 8240 .1 .0 * 26.7 27.0 99
Phillips Bench 8200 .2 .0 * 40.0 39.6 101
Salt River Summit 7640 -M .0 * 28.6 24.7 116
Snake River Station 6920 .0 .0 * 33.7 33.6 100
Somsen Ranch 6800 -M .0 * -M 25.6 *
Spring Creek Divide 9000 .2 .0 * 44.1 34.8 127
Thumb Divide 7980 -M .0 * -M 28.4 *
Togwotee Pass 9580 .0 .0 * 35.5 37.0 96
Triple Peak 8500 -M .0 * 39.5 37.6 105
Two Ocean Plateau 9240 .9 .0 * 42.0 40.2 104
Willow Creek 8080 -M .0 * 53.1 50.8 105
Younts Peak 8350 -M .0 * -M 26.8 *
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Basin Index (%) * 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .0 * 58.4 53.0 110
Canyon 7870 .0 -M * 29.4 -M *
Madison Plateau 7750 .0 .0 * 44.2 39.8 111
West Yellowstone 6700 .0 .0 * 29.8 23.7 126
Whiskey Creek 6800 .0 .0 * 40.0 32.6 123
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Basin Index (%) * 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * -M 33.8 *
Canyon 7870 .0 -M * 29.4 -M *
Evening Star 9200 .0 .0 * 43.2 42.5 102
Fisher Creek 9100 -M .0 * -M 50.8 *
Monument Peak 8850 .1 .0 * 40.8 37.0 110
Northeast Entrance 7350 .1 .0 * -M 23.6 *
Parker Peak 9400 .0 .0 * 38.2 32.0 119
Sylvan Lake 8420 .0 .0 * 38.9 37.7 103
Thumb Divide 7980 -M .0 * -M 28.4 *
Two Ocean Plateau 9240 .9 .0 * 42.0 40.2 104
White Mill 8700 .0 .0 * -M 38.0 *
Wolverine 7650 .0 .0 * 21.6 21.6 100
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Basin Index (%) * 106
WIND RIVER
Burroughs Creek 8750 .0 -M * 25.2 -M *
Castle Creek 8400 .1 .0 * 20.6 17.0 121
Cold Springs 9630 .0 .0 * 24.9 19.8 126
Deer Park 9700 .0 .0 * 40.8 29.6 138
Hobbs Park 10100 .1 .0 * 34.7 25.8 134
Kirwin 9550 .0 .0 * 33.5 25.6 131
Little Warm 9370 .0 .0 * 28.0 23.4 120
South Pass 9040 .0 .0 * 34.6 25.0 138
St. Lawrence Alt 8620 .0 -M * 28.1 -M *
Togwotee Pass 9580 .0 .0 * 35.5 37.0 96
Townsend Creek 8700 .1 .0 * 30.5 24.5 124
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Basin Index (%) * 124
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 36.6 29.6 124
Bear Trap Meadow 8200 .0 .0 * 27.9 19.4 144
Bone Springs Div 9350 .0 .0 * 29.8 28.8 103
Grave Springs 8550 .1 .0 * 25.4 18.6 137
Kirwin 9550 .0 .0 * 33.5 25.6 131
Marquette 8760 .0 .0 * 30.3 24.0 126
Middle Powder 7760 .1 .0 * 28.4 20.1 141
Owl Creek 8975 .0 .0 * 28.6 17.0 168
Powder River Pass 9480 .0 .0 * 30.6 26.5 115
Shell Creek 9580 .0 .0 * 29.7 25.8 115
Timber Creek 7950 .0 .0 * -M 20.8 *
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Basin Index (%) * 128
SHOSHONE RIVER
Blackwater 9780 .1 .0 * 38.7 35.3 110
Evening Star 9200 .0 .0 * 43.2 42.5 102
Marquette 8760 .0 .0 * 30.3 24.0 126
Sylvan Lake 8420 .0 .0 * 38.9 37.7 103
Sylvan Road 7120 .0 .0 * 26.2 26.0 101
Younts Peak 8350 -M .0 * -M 26.8 *
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Basin Index (%) * 107
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 27.9 19.4 144
Cloud Peak Reservoir 9860 .0 .0 * 38.1 28.8 132
Grave Springs 8550 .1 .0 * 25.4 18.6 137
Hansen Sawmill 8360 .0 .0 * 29.9 21.7 138
Middle Powder 7760 .1 .0 * 28.4 20.1 141
Powder River Pass 9480 .0 .0 * 30.6 26.5 115
Soldier Park 8720 .2 .0 * 29.4 21.6 136
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Basin Index (%) * 134
TONGUE RIVER
Big Goose 7990 .3 .0 * 33.3 23.7 141
Bone Springs Div 9350 .0 .0 * 29.8 28.8 103
Burgess Junction 7880 .1 .0 * -M 24.3 *
Dome Lake 8880 .0 .0 * 33.2 27.6 120
Little Goose 8870 .0 .0 * 35.0 25.8 136
Sucker Creek 8880 .0 .0 * 37.0 28.9 128
Tie Creek 6870 .0 .0 * 34.2 25.4 135
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Basin Index (%) * 126
BELLE FOURCHE
Blind Park 6890 .1 .0 * 26.6 26.4 101
Cole Canyon 5910 .1 .0 * 30.3 24.2 125
North Rapid Creek 6130 .0 .0 * 27.6 23.6 117
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Basin Index (%) * 114
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 26.6 26.4 101
North Rapid Creek 6130 .0 .0 * 27.6 23.6 117
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Basin Index (%) * 108
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 38.3 35.8 107
Blackhall Mtn 9839 .1 .0 * 47.6 42.8 111
Cinnabar Park 9707 .1 .0 * 35.1 34.1 103
Columbine 9167 -M .0 * 35.4 36.6 97
Divide Peak 8730 .1 .0 * 36.9 30.9 119
Joe Wright 10158 .0 .0 * 42.0 41.6 101
Laprele Creek 8390 .1 .0 * 27.0 22.4 121
Med Bow 10512 .1 -M * 49.3 -M *
Never Summer 10323 .0 .0 * 35.5 30.9 115
North French Creek 10153 .1 .0 * 43.0 41.8 103
Old Battle 9860 .0 .0 * 55.0 49.4 111
Rawah 9069 -M .0 * 29.9 27.2 110
Sage Creek Basin 7850 .2 .0 * 26.3 21.0 125
Sand Lake 10098 .1 .0 * 41.8 39.6 106
South Brush Creek 8495 -M .0 * 23.5 24.3 97
Tower 10620 .1 .0 * -M 56.2 *
Webber Springs 9260 .1 .0 * 40.0 38.9 103
Whiskey Park 9020 .0 .0 * 43.9 40.5 108
Willow Creek Pass 9523 .1 .0 * 28.5 24.8 115
Zirkel 9338 .1 .0 * 45.2 41.7 108
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Basin Index (%) * 108
SWEETWATER
Deer Park 9700 .0 .0 * 40.8 29.6 138
Larsen Creek 9000 -M .0 * 28.3 20.4 139
South Pass 9040 .0 .0 * 34.6 25.0 138
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Basin Index (%) * 138
LOWER N. PLATTE
Casper Mtn. 7920 .1 .0 * 32.2 24.3 133
Laprele Creek 8390 .1 .0 * 27.0 22.4 121
Reno Hill 8430 -M .0 * 33.2 27.6 120
Windy Peak 7915 .2 .0 * 23.3 21.7 107
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Basin Index (%) * 121
LARAMIE RIVER
Brooklyn Lake 10250 .1 .0 * 37.6 33.6 112
Cinnabar Park 9707 .1 .0 * 35.1 34.1 103
Crow Creek 8335 .0 .0 * 22.0 23.5 94
Deadman Hill 10239 .1 .0 * 34.4 29.3 117
Rawah 9069 -M .0 * 29.9 27.2 110
Roach 9740 .0 .0 * 34.5 32.0 108
Windy Peak 7915 .2 .0 * 23.3 21.7 107
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Basin Index (%) * 108
S. PLATTE
Crow Creek 8335 .0 .0 * 22.0 23.5 94
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Basin Index (%) * 94
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 28.4 23.4 121
Divide Peak 8730 .1 .0 * 36.9 30.9 119
Elk River 8739 .1 .0 * 38.5 29.8 129
Elkhead Divide 8800 .1 -M * -M -M *
Little Snake River 8928 .0 .0 * 54.0 46.4 116
Old Battle 9860 .0 .0 * 55.0 49.4 111
Sage Creek Basin 7850 .2 .0 * 26.3 21.0 125
Sandstone RS 8152 -M .0 * 32.2 26.8 120
Whiskey Park 9020 .0 .0 * 43.9 40.5 108
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Basin Index (%) * 118
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 27.6 21.9 126
Blind Bull Sum 8650 .0 .0 * 30.6 27.6 111
East Rim Divide 7930 -M .0 * 23.3 18.6 125
Elkhart Park G.S. 9400 -M .0 * 25.9 22.2 117
Gros Ventre Summit 8750 .0 .0 * 22.3 21.4 104
Gunsight Pass 9820 .1 .0 * 27.3 24.2 113
Indian Creek 9425 .2 .0 * 35.4 30.6 116
Kendall R.S. 7740 .0 .0 * 22.9 20.7 111
Larsen Creek 9000 -M .0 * 28.3 20.4 139
Loomis Park 8240 .1 .0 * 26.7 27.0 99
New Fork Lake 8340 -M .0 * -M 20.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 26.3 21.1 125
Spring Creek Divide 9000 .2 .0 * 44.1 34.8 127
Triple Peak 8500 -M .0 * 39.5 37.6 105
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Basin Index (%) * 116
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 .0 * 23.6 19.6 120
Buck Pasture 9632 1.9 -M * 34.6 -M *
EF Blacks Fork GS 9360 .0 .0 * 27.3 22.9 119
Hams Fork 7840 -M .0 * 23.7 18.8 126
Henrys Fork 10182 -M -M * 28.8 -M *
Hewinta 9500 .1 .0 * 28.4 24.4 116
Hickerson Park 9122 1.9 .0 * 22.8 20.6 111
Hole-in-Rock 9168 .1 .0 * 24.2 20.6 117
Indian Creek 9425 .2 .0 * 35.4 30.6 116
Kelley R.S. 8180 .2 .0 * 31.7 26.0 122
Spirit Lk 10235 .0 .0 * 36.9 29.4 126
Steel Creek Park 10158 .0 .0 * 35.0 28.6 122
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Basin Index (%) * 120
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 24.8 20.3 122
Bug Lake 7987 .2 .0 * 36.1 26.6 136
Burts Miller Ranch 8000 .2 .0 * 23.1 13.0 178
Chalk Creek #1 9171 .1 .0 * 43.9 35.2 125
Giveout 6930 -M .0 * 24.0 20.9 115
Hayden Fork 9130 1.4 .0 * 40.6 33.5 121
Kelley R.S. 8180 .2 .0 * 31.7 26.0 122
Lily Lake 9133 .0 .0 * 27.2 27.0 101
Monte Cristo 8932 .0 .0 * 51.0 36.2 141
Salt River Summit 7640 -M .0 * 28.6 24.7 116
Spring Creek Divide 9000 .2 .0 * 44.1 34.8 127
Trial Lake 9992 1.0 .0 * 48.2 35.0 138
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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.
