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 SATURDAY: SEPTEMBER 23 , 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 * 33.2 32.0 104
Blind Bull Sum 8650 .2 .0 * 31.3 29.2 107
Cottonwood Creek 7670 .1 .0 * 46.3 38.8 119
East Rim Divide 7930 -M .0 * 24.3 19.2 127
Grand Targhee 9260 .1 .0 * 48.9 50.6 97
Granite Creek 6770 .0 .0 * 24.4 30.2 81
Grassy Lake 7265 -M .0 * 56.1 50.6 111
Gros Ventre Summit 8750 -M .0 * 22.9 21.8 105
Gunsight Pass 9820 .5 .0 * 28.4 24.8 115
Lewis Lake Divide 7850 .1 .0 * -M 48.2 *
Loomis Park 8240 .2 .0 * 27.7 27.6 100
Phillips Bench 8200 .2 .0 * 41.2 40.5 102
Salt River Summit 7640 .0 .0 * 29.3 26.0 113
Snake River Station 6920 .0 .0 * 35.4 34.3 103
Somsen Ranch 6800 -M .0 * 35.0 25.9 135
Spring Creek Divide 9000 .1 .0 * 45.3 35.4 128
Thumb Divide 7980 .1 .0 * 34.2 29.0 118
Togwotee Pass 9580 .1 .0 * 35.8 37.7 95
Triple Peak 8500 -M .0 * 40.2 39.0 103
Two Ocean Plateau 9240 1.7 .0 * 43.9 41.0 107
Willow Creek 8080 -M .0 * 54.2 51.2 106
Younts Peak 8350 -M .0 * -M 27.4 *
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Basin Index (%) * 108
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .1 .0 * 59.5 53.6 111
Canyon 7870 .1 -M * 30.8 -M *
Madison Plateau 7750 .0 .0 * 44.9 40.0 112
West Yellowstone 6700 .1 .0 * 30.4 24.0 127
Whiskey Creek 6800 .1 .0 * 40.6 33.0 123
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Basin Index (%) * 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .4 .0 * 33.5 34.4 97
Canyon 7870 .1 -M * 30.8 -M *
Evening Star 9200 .4 .0 * 45.5 44.1 103
Fisher Creek 9100 .4 .0 * 53.6 51.6 104
Monument Peak 8850 .2 .0 * 42.6 37.1 115
Northeast Entrance 7350 .1 .0 * 26.2 24.2 108
Parker Peak 9400 .2 .0 * 39.5 32.4 122
Sylvan Lake 8420 .2 .0 * 40.6 38.2 106
Thumb Divide 7980 .1 .0 * 34.2 29.0 118
Two Ocean Plateau 9240 1.7 .0 * 43.9 41.0 107
White Mill 8700 .2 .0 * 38.6 38.9 99
Wolverine 7650 .0 .0 * 23.1 22.6 102
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Basin Index (%) * 107
WIND RIVER
Burroughs Creek 8750 .1 -M * 26.4 -M *
Castle Creek 8400 .0 .0 * 21.7 18.0 121
Cold Springs 9630 .0 .0 * 25.4 20.2 126
Deer Park 9700 .0 .0 * 41.2 30.2 136
Hobbs Park 10100 .1 .0 * 35.2 26.4 133
Kirwin 9550 .0 .0 * -M 25.9 *
Little Warm 9370 .0 .0 * 28.6 23.8 120
South Pass 9040 .1 .0 * 34.7 26.5 131
St. Lawrence Alt 8620 .0 -M * 28.5 -M *
Togwotee Pass 9580 .1 .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 .2 .0 * 37.8 30.8 123
Bear Trap Meadow 8200 .0 .0 * 28.9 19.5 148
Bone Springs Div 9350 .0 .0 * 30.7 29.5 104
Grave Springs 8550 .0 .0 * 26.2 19.6 134
Kirwin 9550 .0 .0 * -M 25.9 *
Marquette 8760 .0 .0 * 32.4 24.6 132
Middle Powder 7760 .2 .0 * 28.9 20.6 140
Owl Creek 8975 .0 .0 * 29.6 17.5 169
Powder River Pass 9480 .2 .0 * 31.4 27.2 115
Shell Creek 9580 .0 .0 * 30.4 26.9 113
Timber Creek 7950 .0 .0 * -M 21.9 *
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Basin Index (%) * 128
SHOSHONE RIVER
Blackwater 9780 .1 .0 * 39.5 36.0 110
Evening Star 9200 .4 .0 * 45.5 44.1 103
Marquette 8760 .0 .0 * 32.4 24.6 132
Sylvan Lake 8420 .2 .0 * 40.6 38.2 106
Sylvan Road 7120 -M .0 * 27.6 26.9 103
Younts Peak 8350 -M .0 * -M 27.4 *
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Basin Index (%) * 109
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 28.9 19.5 148
Cloud Peak Reservoir 9860 .0 .0 * -M 29.6 *
Grave Springs 8550 .0 .0 * 26.2 19.6 134
Hansen Sawmill 8360 .0 .0 * 30.3 21.9 138
Middle Powder 7760 .2 .0 * 28.9 20.6 140
Powder River Pass 9480 .2 .0 * 31.4 27.2 115
Soldier Park 8720 .0 .0 * 30.0 21.6 139
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Basin Index (%) * 135
TONGUE RIVER
Big Goose 7990 .0 .0 * 34.2 24.0 142
Bone Springs Div 9350 .0 .0 * 30.7 29.5 104
Burgess Junction 7880 .1 .0 * -M 24.8 *
Dome Lake 8880 .0 .0 * 33.2 28.1 118
Little Goose 8870 .0 .0 * 35.8 27.4 131
Sucker Creek 8880 .0 .0 * 37.6 29.8 126
Tie Creek 6870 .0 .0 * 35.1 26.2 134
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Basin Index (%) * 125
BELLE FOURCHE
Blind Park 6890 .1 .0 * 27.6 26.8 103
Cole Canyon 5910 .1 .0 * 31.1 25.0 124
North Rapid Creek 6130 -M .0 * 28.4 24.6 115
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Basin Index (%) * 114
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 27.6 26.8 103
North Rapid Creek 6130 -M .0 * 28.4 24.6 115
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Basin Index (%) * 109
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 38.6 36.6 105
Blackhall Mtn 9839 .0 .0 * 48.4 43.2 112
Cinnabar Park 9707 .1 .0 * 35.8 35.3 101
Columbine 9167 -M .0 * 35.3 37.0 95
Divide Peak 8730 .0 .0 * 37.0 31.4 118
Joe Wright 10158 .0 .0 * 42.7 42.8 100
Laprele Creek 8390 .1 .0 * 27.2 22.9 119
Med Bow 10512 .0 -M * 50.6 -M *
Never Summer 10323 .0 .0 * 36.4 32.2 113
North French Creek 10153 .0 .0 * 44.0 42.6 103
Old Battle 9860 .0 .0 * 55.7 50.0 111
Rawah 9069 -M .0 * 30.1 28.0 108
Sage Creek Basin 7850 .0 .0 * 26.5 21.7 122
Sand Lake 10098 .1 .0 * 42.5 40.0 106
South Brush Creek 8495 -M .0 * 24.3 25.2 96
Tower 10620 -M .0 * -M 57.6 *
Webber Springs 9260 .1 .0 * 40.7 39.4 103
Whiskey Park 9020 .0 .0 * 44.3 41.6 106
Willow Creek Pass 9523 .1 .0 * 30.1 25.6 118
Zirkel 9338 .1 .0 * 45.7 42.9 107
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Basin Index (%) * 107
SWEETWATER
Deer Park 9700 .0 .0 * 41.2 30.2 136
Larsen Creek 9000 -M .0 * 28.8 21.2 136
South Pass 9040 .1 .0 * 34.7 26.5 131
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Basin Index (%) * 134
LOWER N. PLATTE
Casper Mtn. 7920 .2 .0 * 33.2 25.2 132
Laprele Creek 8390 .1 .0 * 27.2 22.9 119
Reno Hill 8430 -M .0 * 33.6 28.1 120
Windy Peak 7915 .1 .0 * 23.5 21.9 107
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Basin Index (%) * 120
LARAMIE RIVER
Brooklyn Lake 10250 .1 .0 * 38.2 34.0 112
Cinnabar Park 9707 .1 .0 * 35.8 35.3 101
Crow Creek 8335 .0 .0 * 22.4 24.2 93
Deadman Hill 10239 .1 .0 * 34.7 29.8 116
Rawah 9069 -M .0 * 30.1 28.0 108
Roach 9740 .0 .0 * 34.7 32.7 106
Windy Peak 7915 .1 .0 * 23.5 21.9 107
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Basin Index (%) * 107
S. PLATTE
Crow Creek 8335 .0 .0 * 22.4 24.2 93
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Basin Index (%) * 93
LITTLE SNAKE RIVER
Battle Mountain 7498 -M .0 * 29.0 24.0 121
Divide Peak 8730 .0 .0 * 37.0 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 -M .0 * 54.3 46.6 117
Old Battle 9860 .0 .0 * 55.7 50.0 111
Sage Creek Basin 7850 .0 .0 * 26.5 21.7 122
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 (%) * 116
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 27.9 22.5 124
Blind Bull Sum 8650 .2 .0 * 31.3 29.2 107
East Rim Divide 7930 -M .0 * 24.3 19.2 127
Elkhart Park G.S. 9400 .0 .0 * 26.8 22.9 117
Gros Ventre Summit 8750 -M .0 * 22.9 21.8 105
Gunsight Pass 9820 .5 .0 * 28.4 24.8 115
Indian Creek 9425 .9 .0 * 36.6 31.2 117
Kendall R.S. 7740 .0 .0 * 23.8 21.0 113
Larsen Creek 9000 -M .0 * 28.8 21.2 136
Loomis Park 8240 .2 .0 * 27.7 27.6 100
New Fork Lake 8340 -M .0 * -M 20.3 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 27.1 21.7 125
Spring Creek Divide 9000 .1 .0 * 45.3 35.4 128
Triple Peak 8500 -M .0 * 40.2 39.0 103
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Basin Index (%) * 116
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 .0 * 24.3 20.8 117
Buck Pasture 9632 2.0 -M * 35.2 -M *
EF Blacks Fork GS 9360 .0 .0 * 28.1 23.4 120
Hams Fork 7840 -M .0 * 24.7 19.2 129
Henrys Fork 10182 -M -M * 29.8 -M *
Hewinta 9500 .1 .0 * 29.0 24.8 117
Hickerson Park 9122 1.7 .0 * 23.4 21.4 109
Hole-in-Rock 9168 .0 .0 * 25.2 20.8 121
Indian Creek 9425 .9 .0 * 36.6 31.2 117
Kelley R.S. 8180 .5 .0 * 33.0 26.8 123
Spirit Lk 10235 .0 .0 * 37.8 30.3 125
Steel Creek Park 10158 .0 .0 * 35.9 29.6 121
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Basin Index (%) * 120
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 25.2 21.4 118
Bug Lake 7987 .3 .0 * 37.0 27.4 135
Burts Miller Ranch 8000 .0 .0 * 23.5 13.1 179
Chalk Creek #1 9171 .1 .0 * 45.2 35.7 127
Giveout 6930 -M .0 * -M 21.6 *
Hayden Fork 9130 1.5 .0 * 41.2 34.0 121
Kelley R.S. 8180 .5 .0 * 33.0 26.8 123
Lily Lake 9133 .0 .0 * 27.8 27.8 100
Monte Cristo 8932 .1 .0 * 52.1 37.2 140
Salt River Summit 7640 .0 .0 * 29.3 26.0 113
Spring Creek Divide 9000 .1 .0 * 45.3 35.4 128
Trial Lake 9992 .9 .0 * 48.6 35.7 136
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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.
