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: SEPTEMBER 22 , 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 * 32.8 32.0 102
Blind Bull Sum 8650 .1 .0 * 31.1 29.1 107
Cottonwood Creek 7670 .1 .0 * 45.8 38.8 118
East Rim Divide 7930 -M .0 * 24.0 19.2 125
Grand Targhee 9260 -M .0 * 48.6 50.5 96
Granite Creek 6770 .0 .0 * 24.2 30.2 80
Grassy Lake 7265 -M .0 * 55.7 50.6 110
Gros Ventre Summit 8750 .0 .0 * 22.9 21.7 106
Gunsight Pass 9820 .4 .0 * 28.0 24.6 114
Lewis Lake Divide 7850 .1 .0 * -M 48.1 *
Loomis Park 8240 .2 .0 * 27.4 27.6 99
Phillips Bench 8200 .2 .0 * 41.0 40.4 101
Salt River Summit 7640 -M .0 * 28.8 25.9 111
Snake River Station 6920 .0 .0 * 35.0 34.3 102
Somsen Ranch 6800 -M .0 * 34.6 25.9 134
Spring Creek Divide 9000 .1 .0 * 44.9 35.2 128
Thumb Divide 7980 .2 .0 * 34.1 29.0 118
Togwotee Pass 9580 .3 .0 * 35.8 37.7 95
Triple Peak 8500 -M .0 * 40.0 38.7 103
Two Ocean Plateau 9240 1.6 .0 * 43.5 41.0 106
Willow Creek 8080 -M .0 * 53.7 51.2 105
Younts Peak 8350 -M .0 * -M 27.4 *
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Basin Index (%) * 107
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .0 * 59.2 53.6 110
Canyon 7870 .0 -M * -M -M *
Madison Plateau 7750 .0 .0 * 44.7 40.0 112
West Yellowstone 6700 .0 .0 * 30.3 24.0 126
Whiskey Creek 6800 .0 .0 * 40.4 33.0 122
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Basin Index (%) * 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * -M 34.2 *
Canyon 7870 .0 -M * -M -M *
Evening Star 9200 .0 .0 * -M 44.0 *
Fisher Creek 9100 .3 .0 * 53.0 51.5 103
Monument Peak 8850 .1 .0 * 42.2 37.0 114
Northeast Entrance 7350 .1 .0 * -M 24.2 *
Parker Peak 9400 .0 .0 * 38.9 32.3 120
Sylvan Lake 8420 .0 .0 * 39.9 38.2 104
Thumb Divide 7980 .2 .0 * 34.1 29.0 118
Two Ocean Plateau 9240 1.6 .0 * 43.5 41.0 106
White Mill 8700 .0 .0 * -M 38.9 *
Wolverine 7650 .0 .0 * -M 22.6 *
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Basin Index (%) * 110
WIND RIVER
Burroughs Creek 8750 .0 -M * 26.0 -M *
Castle Creek 8400 .2 .0 * 21.3 18.0 118
Cold Springs 9630 .0 .0 * 25.3 20.2 125
Deer Park 9700 .0 .0 * 41.0 30.0 137
Hobbs Park 10100 .1 .0 * 35.1 26.4 133
Kirwin 9550 .0 .0 * -M 25.9 *
Little Warm 9370 .0 .0 * 28.5 23.8 120
South Pass 9040 .0 .0 * 34.7 25.6 136
St. Lawrence Alt 8620 .0 -M * 28.5 -M *
Togwotee Pass 9580 .3 .0 * 35.8 37.7 95
Townsend Creek 8700 .2 .0 * 30.8 24.6 125
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Basin Index (%) * 122
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 37.0 30.6 121
Bear Trap Meadow 8200 .1 .0 * 28.5 19.5 146
Bone Springs Div 9350 .0 .0 * 30.1 29.4 102
Grave Springs 8550 .1 .0 * 25.9 19.3 134
Kirwin 9550 .0 .0 * -M 25.9 *
Marquette 8760 .1 .0 * 31.6 24.6 128
Middle Powder 7760 .1 .0 * 28.7 20.6 139
Owl Creek 8975 .0 .0 * 29.4 17.4 169
Powder River Pass 9480 .1 .0 * 31.0 27.2 114
Shell Creek 9580 .0 .0 * 29.9 26.9 111
Timber Creek 7950 .0 .0 * -M 21.9 *
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Basin Index (%) * 126
SHOSHONE RIVER
Blackwater 9780 .1 .0 * 39.3 36.0 109
Evening Star 9200 .0 .0 * -M 44.0 *
Marquette 8760 .1 .0 * 31.6 24.6 128
Sylvan Lake 8420 .0 .0 * 39.9 38.2 104
Sylvan Road 7120 .0 .0 * -M 26.8 *
Younts Peak 8350 -M .0 * -M 27.4 *
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Basin Index (%) * 112
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * 28.5 19.5 146
Cloud Peak Reservoir 9860 .0 .0 * 38.2 29.6 129
Grave Springs 8550 .1 .0 * 25.9 19.3 134
Hansen Sawmill 8360 .0 .0 * 30.3 21.9 138
Middle Powder 7760 .1 .0 * 28.7 20.6 139
Powder River Pass 9480 .1 .0 * 31.0 27.2 114
Soldier Park 8720 .2 .0 * 29.6 21.6 137
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Basin Index (%) * 133
TONGUE RIVER
Big Goose 7990 .3 .0 * 33.7 24.0 140
Bone Springs Div 9350 .0 .0 * 30.1 29.4 102
Burgess Junction 7880 .1 .0 * -M 24.7 *
Dome Lake 8880 .0 .0 * 33.4 28.0 119
Little Goose 8870 .1 .0 * 35.4 27.4 129
Sucker Creek 8880 .1 .0 * 37.2 29.7 125
Tie Creek 6870 .0 .0 * 34.5 26.0 133
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Basin Index (%) * 124
BELLE FOURCHE
Blind Park 6890 .0 .0 * 26.9 26.8 100
Cole Canyon 5910 .1 .0 * 30.2 24.3 124
North Rapid Creek 6130 .0 .0 * 27.8 24.6 113
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Basin Index (%) * 112
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 26.9 26.8 100
North Rapid Creek 6130 .0 .0 * 27.8 24.6 113
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Basin Index (%) * 106
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 38.6 36.6 105
Blackhall Mtn 9839 .1 .0 * 48.3 43.1 112
Cinnabar Park 9707 .1 .0 * 35.6 35.2 101
Columbine 9167 -M .0 * 35.4 37.0 96
Divide Peak 8730 .0 .0 * 37.1 31.4 118
Joe Wright 10158 .0 .0 * 42.7 42.6 100
Laprele Creek 8390 .1 .0 * 27.1 22.7 119
Med Bow 10512 .1 -M * 50.4 -M *
Never Summer 10323 .0 .0 * 36.4 32.0 114
North French Creek 10153 .1 .0 * 43.9 42.6 103
Old Battle 9860 .0 .0 * 55.8 49.9 112
Rawah 9069 .0 .0 * 30.1 27.8 108
Sage Creek Basin 7850 .0 .0 * 26.5 21.0 126
Sand Lake 10098 .0 .0 * 42.4 40.0 106
South Brush Creek 8495 -M .0 * 24.2 24.8 98
Tower 10620 .1 .0 * 64.0 57.5 111
Webber Springs 9260 .1 .0 * 40.7 39.3 104
Whiskey Park 9020 .0 .0 * 44.3 41.6 106
Willow Creek Pass 9523 .1 .0 * 30.2 25.5 118
Zirkel 9338 .1 .0 * 45.7 42.8 107
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Basin Index (%) * 108
SWEETWATER
Deer Park 9700 .0 .0 * 41.0 30.0 137
Larsen Creek 9000 -M .0 * 28.7 20.8 138
South Pass 9040 .0 .0 * 34.7 25.6 136
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Basin Index (%) * 137
LOWER N. PLATTE
Casper Mtn. 7920 .2 .0 * 32.7 25.1 130
Laprele Creek 8390 .1 .0 * 27.1 22.7 119
Reno Hill 8430 .0 .0 * 33.5 27.6 121
Windy Peak 7915 .0 .0 * 23.4 21.9 107
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Basin Index (%) * 120
LARAMIE RIVER
Brooklyn Lake 10250 .1 .0 * 38.1 34.0 112
Cinnabar Park 9707 .1 .0 * 35.6 35.2 101
Crow Creek 8335 .1 .0 * 22.4 24.2 93
Deadman Hill 10239 .1 .0 * 34.7 29.8 116
Rawah 9069 .0 .0 * 30.1 27.8 108
Roach 9740 .1 .0 * 34.7 32.6 106
Windy Peak 7915 .0 .0 * 23.4 21.9 107
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Basin Index (%) * 107
S. PLATTE
Crow Creek 8335 .1 .0 * 22.4 24.2 93
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Basin Index (%) * 93
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 28.9 23.9 121
Divide Peak 8730 .0 .0 * 37.1 31.4 118
Elk River 8739 .2 .0 * 38.8 31.1 125
Elkhead Divide 8800 .0 -M * 41.1 -M *
Little Snake River 8928 .0 .0 * 54.3 46.6 117
Old Battle 9860 .0 .0 * 55.8 49.9 112
Sage Creek Basin 7850 .0 .0 * 26.5 21.0 126
Sandstone RS 8152 -M .0 * 32.4 27.2 119
Whiskey Park 9020 .0 .0 * 44.3 41.6 106
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Basin Index (%) * 117
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 27.7 22.5 123
Blind Bull Sum 8650 .1 .0 * 31.1 29.1 107
East Rim Divide 7930 -M .0 * 24.0 19.2 125
Elkhart Park G.S. 9400 .0 .0 * 26.5 22.9 116
Gros Ventre Summit 8750 .0 .0 * 22.9 21.7 106
Gunsight Pass 9820 .4 .0 * 28.0 24.6 114
Indian Creek 9425 .4 .0 * 36.0 31.2 115
Kendall R.S. 7740 .0 .0 * 23.6 21.0 112
Larsen Creek 9000 -M .0 * 28.7 20.8 138
Loomis Park 8240 .2 .0 * 27.4 27.6 99
New Fork Lake 8340 -M .0 * -M 20.3 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 26.9 21.7 124
Spring Creek Divide 9000 .1 .0 * 44.9 35.2 128
Triple Peak 8500 -M .0 * 40.0 38.7 103
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Basin Index (%) * 115
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 .0 * 24.1 20.2 119
Buck Pasture 9632 -M -M * 35.2 -M *
EF Blacks Fork GS 9360 .1 .0 * 28.0 23.2 121
Hams Fork 7840 -M .0 * 24.4 19.0 128
Henrys Fork 10182 -M -M * 29.6 -M *
Hewinta 9500 .1 .0 * 28.9 24.8 117
Hickerson Park 9122 -M .0 * 23.3 21.4 109
Hole-in-Rock 9168 .0 .0 * 25.1 20.8 121
Indian Creek 9425 .4 .0 * 36.0 31.2 115
Kelley R.S. 8180 .2 .0 * 32.4 26.4 123
Spirit Lk 10235 .1 .0 * 37.7 30.3 124
Steel Creek Park 10158 .1 .0 * 35.8 29.4 122
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Basin Index (%) * 120
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 25.0 20.8 120
Bug Lake 7987 .3 .0 * 36.5 27.0 135
Burts Miller Ranch 8000 .1 .0 * 23.4 13.1 179
Chalk Creek #1 9171 .2 .0 * 45.1 35.2 128
Giveout 6930 -M .0 * 24.6 21.2 116
Hayden Fork 9130 1.4 .0 * 41.0 33.8 121
Kelley R.S. 8180 .2 .0 * 32.4 26.4 123
Lily Lake 9133 .0 .0 * 27.5 27.7 99
Monte Cristo 8932 .0 .0 * 51.5 36.7 140
Salt River Summit 7640 -M .0 * 28.8 25.9 111
Spring Creek Divide 9000 .1 .0 * 44.9 35.2 128
Trial Lake 9992 1.0 .0 * 48.5 35.1 138
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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.
