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 SUNDAY: AUGUST 6 , 2023
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 -M .0 * 29.1 28.8 101
Blind Bull Sum 8650 .0 .0 * 28.5 26.2 109
Cottonwood Creek 7670 .0 .0 * 41.5 36.1 115
East Rim Divide 7930 -M .0 * 19.2 17.8 108
Grand Targhee 9260 -M .0 * 42.7 46.0 93
Granite Creek 6770 -M .0 * 21.3 28.2 76
Grassy Lake 7265 -M .0 * 50.7 47.6 107
Gros Ventre Summit 8750 .1 .0 * 19.7 19.4 102
Gunsight Pass 9820 .1 .0 * 24.6 21.3 115
Lewis Lake Divide 7850 .0 .0 * 50.2 44.8 112
Loomis Park 8240 .2 .0 * 24.3 25.0 97
Phillips Bench 8200 .2 .0 * 38.4 36.4 105
Salt River Summit 7640 -M .0 * 27.8 23.0 121
Snake River Station 6920 .0 .0 * 30.7 31.9 96
Somsen Ranch 6800 -M .0 * 30.8 23.9 129
Spring Creek Divide 9000 .3 .0 * 42.0 33.0 127
Thumb Divide 7980 .0 .0 * 27.9 26.4 106
Togwotee Pass 9580 .0 .0 * 33.5 34.9 96
Triple Peak 8500 -M .0 * 37.5 36.7 102
Two Ocean Plateau 9240 .9 .0 * 39.7 38.8 102
Willow Creek 8080 .0 .0 * 48.3 47.6 101
Younts Peak 8350 .0 .0 * 24.6 24.0 102
----- -----
Basin Index (%) * 105
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .1 .0 * 54.4 50.6 108
Canyon 7870 -M -M * 26.6 -M *
Madison Plateau 7750 .0 .0 * 39.8 36.4 109
West Yellowstone 6700 .0 .0 * 26.4 22.2 119
Whiskey Creek 6800 .0 .0 * 36.7 30.3 121
----- -----
Basin Index (%) * 113
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * 29.3 31.9 92
Canyon 7870 -M -M * 26.6 -M *
Evening Star 9200 .0 .0 * 40.4 40.7 99
Fisher Creek 9100 .0 .0 * 47.8 47.8 100
Monument Peak 8850 .0 .0 * -M 35.2 *
Northeast Entrance 7350 .1 .0 * 22.3 21.8 102
Parker Peak 9400 .0 .0 * 35.3 30.0 118
Sylvan Lake 8420 .0 .0 * 34.5 35.0 99
Thumb Divide 7980 .0 .0 * 27.9 26.4 106
Two Ocean Plateau 9240 .9 .0 * 39.7 38.8 102
White Mill 8700 .0 .0 * 33.7 34.8 97
Wolverine 7650 .0 .0 * 20.3 20.1 101
----- -----
Basin Index (%) * 101
WIND RIVER
Burroughs Creek 8750 .0 -M * 23.7 -M *
Castle Creek 8400 .0 .0 * 19.2 15.6 123
Cold Springs 9630 .0 .0 * 22.8 18.6 123
Deer Park 9700 .0 .0 * 39.3 27.9 141
Hobbs Park 10100 .0 .0 * 32.7 24.9 131
Kirwin 9550 .0 .0 * 30.9 22.9 135
Little Warm 9370 .0 .0 * 26.0 20.6 126
South Pass 9040 .0 .0 * 32.9 24.5 134
St. Lawrence Alt 8620 .0 -M * 26.6 -M *
Togwotee Pass 9580 .0 .0 * 33.5 34.9 96
Townsend Creek 8700 .0 .0 * 29.3 22.9 128
----- -----
Basin Index (%) * 125
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 31.4 27.6 114
Bear Trap Meadow 8200 .0 .0 * -M 18.2 *
Bone Springs Div 9350 .0 .0 * 27.3 26.9 101
Grave Springs 8550 .0 .0 * 23.3 17.2 135
Kirwin 9550 .0 .0 * 30.9 22.9 135
Marquette 8760 .0 .0 * 28.0 22.1 127
Middle Powder 7760 .1 .0 * 24.1 19.6 123
Owl Creek 8975 .0 .0 * 24.8 15.6 159
Powder River Pass 9480 .0 .0 * 28.5 24.9 114
Shell Creek 9580 .0 .0 * 28.1 24.5 115
Timber Creek 7950 .0 .0 * 25.8 18.6 139
----- -----
Basin Index (%) * 124
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 36.3 33.2 109
Evening Star 9200 .0 .0 * 40.4 40.7 99
Marquette 8760 .0 .0 * 28.0 22.1 127
Sylvan Lake 8420 .0 .0 * 34.5 35.0 99
Sylvan Road 7120 .0 .0 * 22.7 24.4 93
Younts Peak 8350 .0 .0 * 24.6 24.0 102
----- -----
Basin Index (%) * 104
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * -M 18.2 *
Cloud Peak Reservoir 9860 .0 .0 * 34.0 27.2 125
Grave Springs 8550 .0 .0 * 23.3 17.2 135
Hansen Sawmill 8360 .0 .0 * 26.2 20.0 131
Middle Powder 7760 .1 .0 * 24.1 19.6 123
Powder River Pass 9480 .0 .0 * 28.5 24.9 114
Soldier Park 8720 .2 .0 * 25.8 19.6 132
----- -----
Basin Index (%) * 126
TONGUE RIVER
Big Goose 7990 .2 .0 * 29.6 22.4 132
Bone Springs Div 9350 .0 .0 * 27.3 26.9 101
Burgess Junction 7880 .0 .0 * 29.5 22.8 129
Dome Lake 8880 .0 .0 * 29.6 26.0 114
Little Goose 8870 .0 .0 * 31.4 24.6 128
Sucker Creek 8880 .0 .0 * 34.0 27.0 126
Tie Creek 6870 .0 .0 * 30.6 24.0 128
----- -----
Basin Index (%) * 122
BELLE FOURCHE
Blind Park 6890 .1 .0 * 25.5 24.8 103
Cole Canyon 5910 .1 .0 * 27.7 22.4 124
North Rapid Creek 6130 .0 .0 * 25.3 21.2 119
----- -----
Basin Index (%) * 115
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 25.5 24.8 103
North Rapid Creek 6130 .0 .0 * 25.3 21.2 119
----- -----
Basin Index (%) * 110
UPPER N. PLATTE
Arapaho Ridge 10976 .0 .0 * 34.3 33.5 102
Blackhall Mtn 9839 -M .0 * 46.6 42.0 111
Cinnabar Park 9707 -M .0 * 31.8 31.9 100
Columbine 9167 -M .0 * -M 34.8 *
Divide Peak 8730 -M .0 * 35.7 29.0 123
Joe Wright 10158 .0 .0 * 39.5 38.8 102
Laprele Creek 8390 .0 .0 * 24.3 20.1 121
Med Bow 10512 -M -M * 47.1 -M *
Never Summer 10323 .0 .0 * 32.6 28.4 115
North French Creek 10153 .0 .0 * 40.3 40.0 101
Old Battle 9860 .0 .0 * 51.9 47.2 110
Rawah 9069 .0 .0 * 26.9 25.3 106
Sage Creek Basin 7850 -M .0 * 25.8 18.4 140
Sand Lake 10098 .2 .0 * 39.8 38.6 103
South Brush Creek 8495 .1 .0 * 22.5 22.8 99
Tower 10620 .1 .0 * 60.5 54.4 111
Webber Springs 9260 .0 .0 * 37.5 37.3 101
Whiskey Park 9020 -M .0 * 42.3 38.4 110
Willow Creek Pass 9523 .0 .0 * 25.1 22.6 111
Zirkel 9338 .0 .0 * 42.9 39.6 108
----- -----
Basin Index (%) * 109
SWEETWATER
Deer Park 9700 .0 .0 * 39.3 27.9 141
Larsen Creek 9000 -M .0 * 25.4 19.6 130
South Pass 9040 .0 .0 * 32.9 24.5 134
----- -----
Basin Index (%) * 136
LOWER N. PLATTE
Casper Mtn. 7920 -M .0 * 30.5 23.0 133
Laprele Creek 8390 .0 .0 * 24.3 20.1 121
Reno Hill 8430 -M .0 * 30.6 26.8 114
Windy Peak 7915 -M .0 * 21.3 19.8 108
----- -----
Basin Index (%) * 119
LARAMIE RIVER
Brooklyn Lake 10250 -M .0 * 35.1 32.7 107
Cinnabar Park 9707 -M .0 * 31.8 31.9 100
Crow Creek 8335 .0 .0 * 19.4 21.2 92
Deadman Hill 10239 -M .0 * 32.1 28.4 113
Rawah 9069 .0 .0 * 26.9 25.3 106
Roach 9740 .0 .0 * 31.6 29.8 106
Windy Peak 7915 -M .0 * 21.3 19.8 108
----- -----
Basin Index (%) * 105
S. PLATTE
Crow Creek 8335 .0 .0 * 19.4 21.2 92
----- -----
Basin Index (%) * 92
LITTLE SNAKE RIVER
Battle Mountain 7498 -M .0 * 27.3 21.8 125
Divide Peak 8730 -M .0 * 35.7 29.0 123
Elk River 8739 -M .0 * 36.2 27.6 131
Elkhead Divide 8800 .0 -M * 38.4 -M *
Little Snake River 8928 -M .0 * 52.8 44.0 120
Old Battle 9860 .0 .0 * 51.9 47.2 110
Sage Creek Basin 7850 -M .0 * 25.8 18.4 140
Sandstone RS 8152 -M .0 * 31.4 24.8 127
Whiskey Park 9020 -M .0 * 42.3 38.4 110
----- -----
Basin Index (%) * 121
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 24.8 20.3 122
Blind Bull Sum 8650 .0 .0 * 28.5 26.2 109
East Rim Divide 7930 -M .0 * 19.2 17.8 108
Elkhart Park G.S. 9400 -M .0 * 23.2 21.2 109
Gros Ventre Summit 8750 .1 .0 * 19.7 19.4 102
Gunsight Pass 9820 .1 .0 * 24.6 21.3 115
Indian Creek 9425 .1 .0 * 33.7 29.2 115
Kendall R.S. 7740 .0 .0 * 20.8 19.6 106
Larsen Creek 9000 -M .0 * 25.4 19.6 130
Loomis Park 8240 .2 .0 * 24.3 25.0 97
New Fork Lake 8340 -M .0 * -M 18.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * 24.1 20.2 119
Spring Creek Divide 9000 .3 .0 * 42.0 33.0 127
Triple Peak 8500 -M .0 * 37.5 36.7 102
----- -----
Basin Index (%) * 112
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 .0 * 21.3 18.6 115
Buck Pasture 9632 .0 -M * 30.9 -M *
EF Blacks Fork GS 9360 .0 .0 * 22.9 20.5 112
Hams Fork 7840 -M .0 * 22.2 17.4 128
Henrys Fork 10182 -M -M * 24.2 -M *
Hewinta 9500 .0 .0 * 23.7 22.2 107
Hickerson Park 9122 .0 .0 * 20.5 18.0 114
Hole-in-Rock 9168 .2 .0 * 20.9 18.1 115
Indian Creek 9425 .1 .0 * 33.7 29.2 115
Kelley R.S. 8180 -M .0 * 30.2 24.9 121
Spirit Lk 10235 .0 .0 * 31.8 25.4 125
Steel Creek Park 10158 .0 .0 * 29.6 25.2 117
----- -----
Basin Index (%) * 117
UPPER BEAR RIVER
Bear River RS 8777 .0 .0 * 22.1 17.6 126
Bug Lake 7987 .2 .0 * 33.6 25.0 134
Burts Miller Ranch 8000 .1 .0 * -M 10.9 *
Chalk Creek #1 9171 .0 .0 * 39.8 32.8 121
Giveout 6930 .3 .0 * 22.8 19.8 115
Hayden Fork 9130 1.4 .0 * -M 30.0 *
Kelley R.S. 8180 -M .0 * 30.2 24.9 121
Lily Lake 9133 .0 .0 * 23.7 23.2 102
Monte Cristo 8932 .0 .0 * 48.2 34.2 141
Salt River Summit 7640 -M .0 * 27.8 23.0 121
Spring Creek Divide 9000 .3 .0 * 42.0 33.0 127
Trial Lake 9992 .0 .0 * 43.5 31.6 138
----- -----
Basin Index (%) * 126
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.
