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: JULY 20 , 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 * 26.6 28.0 95
Blind Bull Sum 8650 .0 .0 * 26.0 25.6 102
Cottonwood Creek 7670 .0 .0 * 40.0 35.0 114
East Rim Divide 7930 -M .0 * 18.3 17.2 106
Grand Targhee 9260 -M .0 * 39.5 45.4 87
Granite Creek 6770 -M .0 * 21.3 27.6 77
Grassy Lake 7265 -M .0 * 49.4 47.4 104
Gros Ventre Summit 8750 .0 .0 * 18.6 18.6 100
Gunsight Pass 9820 .1 .0 * 23.0 21.0 110
Lewis Lake Divide 7850 -M .0 * 48.3 44.2 109
Loomis Park 8240 .0 .0 * 23.1 24.0 96
Phillips Bench 8200 .1 .0 * 38.0 35.8 106
Salt River Summit 7640 -M .0 * 27.0 22.6 119
Snake River Station 6920 -M .0 * 29.0 31.6 92
Somsen Ranch 6800 -M .0 * 28.2 23.0 123
Spring Creek Divide 9000 .3 .0 * 39.6 32.2 123
Thumb Divide 7980 .0 .0 * 26.5 26.0 102
Togwotee Pass 9580 .0 .0 * 30.7 34.0 90
Triple Peak 8500 -M .0 * 35.7 36.4 98
Two Ocean Plateau 9240 .8 .0 * 37.8 38.2 99
Willow Creek 8080 .0 .0 * 47.3 46.1 103
Younts Peak 8350 .0 .0 * 21.9 23.0 95
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Basin Index (%) * 102
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .0 * 52.8 50.0 106
Canyon 7870 .0 -M * 25.0 -M *
Madison Plateau 7750 .0 .0 * 37.7 35.6 106
West Yellowstone 6700 .0 .0 * 24.2 21.4 113
Whiskey Creek 6800 .0 .0 * 34.4 29.9 115
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Basin Index (%) * 109
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 28.6 30.4 94
Canyon 7870 .0 -M * 25.0 -M *
Evening Star 9200 .0 .0 * 39.4 39.7 99
Fisher Creek 9100 .0 .0 * 46.9 47.0 100
Monument Peak 8850 .0 .0 * 34.9 34.0 103
Northeast Entrance 7350 .1 .0 * 21.2 20.6 103
Parker Peak 9400 .0 .0 * 33.9 29.2 116
Sylvan Lake 8420 .0 .0 * 33.0 34.6 95
Thumb Divide 7980 .0 .0 * 26.5 26.0 102
Two Ocean Plateau 9240 .8 .0 * 37.8 38.2 99
White Mill 8700 .0 .0 * 33.1 33.4 99
Wolverine 7650 .0 .0 * 19.5 19.5 100
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Basin Index (%) * 101
WIND RIVER
Burroughs Creek 8750 .0 -M * 20.8 -M *
Castle Creek 8400 .0 .0 * 16.8 15.0 112
Cold Springs 9630 .0 .0 * 20.8 18.4 113
Deer Park 9700 .0 .0 * 37.7 26.6 142
Hobbs Park 10100 .0 .0 * 31.2 24.4 128
Kirwin 9550 .0 .0 * 27.8 21.6 129
Little Warm 9370 .0 .0 * 23.1 19.6 118
South Pass 9040 .0 .0 * 31.9 24.4 131
St. Lawrence Alt 8620 .0 -M * 23.7 -M *
Togwotee Pass 9580 .0 .0 * 30.7 34.0 90
Townsend Creek 8700 .0 .0 * 27.5 21.6 127
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Basin Index (%) * 120
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 30.3 27.2 111
Bear Trap Meadow 8200 .0 .0 * 22.2 17.4 128
Bone Springs Div 9350 .0 .0 * 25.7 25.6 100
Grave Springs 8550 .0 .0 * 21.5 16.6 130
Kirwin 9550 .0 .0 * 27.8 21.6 129
Marquette 8760 .0 .0 * 25.5 21.2 120
Middle Powder 7760 .0 .0 * 22.8 18.7 122
Owl Creek 8975 .0 .0 * 22.9 14.7 156
Powder River Pass 9480 .0 .0 * 25.9 23.8 109
Shell Creek 9580 .0 .0 * 27.1 24.4 111
Timber Creek 7950 .0 .0 * 23.1 18.0 128
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Basin Index (%) * 120
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 35.2 32.6 108
Evening Star 9200 .0 .0 * 39.4 39.7 99
Marquette 8760 .0 .0 * 25.5 21.2 120
Sylvan Lake 8420 .0 .0 * 33.0 34.6 95
Sylvan Road 7120 .0 .0 * 21.3 23.8 89
Younts Peak 8350 .0 .0 * 21.9 23.0 95
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Basin Index (%) * 101
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 22.2 17.4 128
Cloud Peak Reservoir 9860 .0 .0 * 32.0 26.0 123
Grave Springs 8550 .0 .0 * 21.5 16.6 130
Hansen Sawmill 8360 .0 .0 * 25.2 18.9 133
Middle Powder 7760 .0 .0 * 22.8 18.7 122
Powder River Pass 9480 .0 .0 * 25.9 23.8 109
Soldier Park 8720 .0 .0 * 23.2 18.6 125
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Basin Index (%) * 123
TONGUE RIVER
Big Goose 7990 .0 .0 * 27.8 21.6 129
Bone Springs Div 9350 .0 .0 * 25.7 25.6 100
Burgess Junction 7880 .0 .0 * 28.2 21.8 129
Dome Lake 8880 .0 .0 * 28.6 24.8 115
Little Goose 8870 .0 .0 * 29.3 23.8 123
Sucker Creek 8880 .0 .0 * 32.8 26.2 125
Tie Creek 6870 .0 .0 * 29.6 22.8 130
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Basin Index (%) * 121
BELLE FOURCHE
Blind Park 6890 .0 .0 * 23.8 22.8 104
Cole Canyon 5910 .0 .0 * 25.3 21.1 120
North Rapid Creek 6130 .0 .0 * 21.8 20.2 108
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Basin Index (%) * 111
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 23.8 22.8 104
North Rapid Creek 6130 .0 .0 * 21.8 20.2 108
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Basin Index (%) * 106
UPPER N. PLATTE
Arapaho Ridge 10976 .1 .0 * 33.2 31.6 105
Blackhall Mtn 9839 -M .0 * 45.1 42.0 107
Cinnabar Park 9707 -M .0 * 30.2 30.9 98
Columbine 9167 .0 .0 * 33.2 34.2 97
Divide Peak 8730 -M .0 * 34.9 28.6 122
Joe Wright 10158 -M .0 * 37.3 37.5 99
Laprele Creek 8390 -M .0 * 22.8 19.6 116
Med Bow 10512 -M -M * 45.0 -M *
Never Summer 10323 -M .0 * -M 27.2 *
North French Creek 10153 .0 .0 * 38.8 39.8 97
Old Battle 9860 .1 .0 * 49.3 46.0 107
Rawah 9069 .1 .0 * -M 24.4 *
Sage Creek Basin 7850 -M .0 * 25.1 17.9 140
Sand Lake 10098 .2 .0 * 37.9 37.2 102
South Brush Creek 8495 .2 .0 * 20.9 21.6 97
Tower 10620 .0 .0 * 59.9 54.0 111
Webber Springs 9260 .0 .0 * 36.0 36.2 99
Whiskey Park 9020 -M .0 * 41.3 38.0 109
Willow Creek Pass 9523 .0 .0 * 24.1 22.2 109
Zirkel 9338 .5 .0 * -M 38.7 *
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Basin Index (%) * 106
SWEETWATER
Deer Park 9700 .0 .0 * 37.7 26.6 142
Larsen Creek 9000 -M .0 * 23.7 18.8 126
South Pass 9040 .0 .0 * 31.9 24.4 131
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Basin Index (%) * 134
LOWER N. PLATTE
Casper Mtn. 7920 -M .0 * 27.7 23.0 120
Laprele Creek 8390 -M .0 * 22.8 19.6 116
Reno Hill 8430 -M .0 * 28.8 26.2 110
Windy Peak 7915 -M .0 * 19.9 19.2 104
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Basin Index (%) * 113
LARAMIE RIVER
Brooklyn Lake 10250 -M .0 * 33.8 32.0 106
Cinnabar Park 9707 -M .0 * 30.2 30.9 98
Crow Creek 8335 .0 .0 * 17.9 19.5 92
Deadman Hill 10239 -M .0 * -M 27.7 *
Rawah 9069 .1 .0 * -M 24.4 *
Roach 9740 -M .0 * -M 29.2 *
Windy Peak 7915 -M .0 * 19.9 19.2 104
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Basin Index (%) * 100
S. PLATTE
Crow Creek 8335 .0 .0 * 17.9 19.5 92
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Basin Index (%) * 92
LITTLE SNAKE RIVER
Battle Mountain 7498 -M .0 * 25.9 21.2 122
Divide Peak 8730 -M .0 * 34.9 28.6 122
Elk River 8739 -M .0 * -M 27.0 *
Elkhead Divide 8800 .1 -M * 37.2 -M *
Little Snake River 8928 .0 .0 * 50.8 43.4 117
Old Battle 9860 .1 .0 * 49.3 46.0 107
Sage Creek Basin 7850 -M .0 * 25.1 17.9 140
Sandstone RS 8152 .0 .0 * 30.4 24.6 124
Whiskey Park 9020 -M .0 * 41.3 38.0 109
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Basin Index (%) * 117
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 22.7 20.0 114
Blind Bull Sum 8650 .0 .0 * 26.0 25.6 102
East Rim Divide 7930 -M .0 * 18.3 17.2 106
Elkhart Park G.S. 9400 -M .0 * 20.9 20.2 103
Gros Ventre Summit 8750 .0 .0 * 18.6 18.6 100
Gunsight Pass 9820 .1 .0 * 23.0 21.0 110
Indian Creek 9425 .1 .0 * 32.4 28.4 114
Kendall R.S. 7740 .1 .0 * 20.1 18.8 107
Larsen Creek 9000 -M .0 * 23.7 18.8 126
Loomis Park 8240 .0 .0 * 23.1 24.0 96
New Fork Lake 8340 -M .0 * -M 17.1 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 22.8 19.8 115
Spring Creek Divide 9000 .3 .0 * 39.6 32.2 123
Triple Peak 8500 -M .0 * 35.7 36.4 98
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Basin Index (%) * 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 .3 .0 * 20.3 17.8 114
Buck Pasture 9632 .0 -M * 28.4 -M *
EF Blacks Fork GS 9360 .0 .0 * 21.6 19.8 109
Hams Fork 7840 -M .0 * 21.6 17.4 124
Henrys Fork 10182 -M -M * 23.2 -M *
Hewinta 9500 .0 .0 * 22.7 20.9 109
Hickerson Park 9122 .0 .0 * 19.1 16.6 115
Hole-in-Rock 9168 .2 .0 * 19.8 16.6 119
Indian Creek 9425 .1 .0 * 32.4 28.4 114
Kelley R.S. 8180 -M .0 * 29.5 24.7 119
Spirit Lk 10235 .0 .0 * 29.8 24.7 121
Steel Creek Park 10158 .0 .0 * 28.6 24.2 118
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Basin Index (%) * 116
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 20.9 17.0 123
Bug Lake 7987 .2 .0 * 33.6 24.6 137
Burts Miller Ranch 8000 .3 .0 * 18.5 10.4 178
Chalk Creek #1 9171 .0 .0 * 38.5 31.5 122
Giveout 6930 .5 .0 * 21.6 19.4 111
Hayden Fork 9130 .0 .0 * 34.4 28.6 120
Kelley R.S. 8180 -M .0 * 29.5 24.7 119
Lily Lake 9133 .2 .0 * 23.2 22.8 102
Monte Cristo 8932 .0 .0 * 47.3 33.4 142
Salt River Summit 7640 -M .0 * 27.0 22.6 119
Spring Creek Divide 9000 .3 .0 * 39.6 32.2 123
Trial Lake 9992 .0 .0 * 40.7 30.8 132
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Basin Index (%) * 126
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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.
