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 18 , 2019
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
Base Camp 7060 .0 .0 * 29.2 29.7 98
Black Bear 8170 .0 .0 * 58.9 52.1 113
Blind Bull Sum 8650 .0 .0 * 27.3 28.3 96
Cottonwood Creek 7670 .0 .0 * 37.2 36.1 103
East Rim Divide 7930 .0 .0 * 19.1 18.1 106
Grand Targhee 9260 .0 .0 * 46.9 44.7 105
Granite Creek 6770 -M .0 * 30.5 27.6 111
Grassy Lake 7265 .0 .0 * -M 49.1 *
Gros Ventre Summit 8750 .0 .0 * 20.2 21.1 96
Gunsight Pass 9820 .1 .0 * 25.8 22.8 113
Lewis Lake Divide 7850 .0 .0 * 49.7 47.9 104
Phillips Bench 8200 .0 .0 * 42.9 38.7 111
Salt River Summit 7640 .0 .0 * 26.2 24.4 107
Snake River Station 6920 .0 .0 * 35.2 32.6 108
Spring Creek Divide 9000 .0 .0 * 32.4 33.2 98
Thumb Divide 7980 .0 .0 * 27.1 27.7 98
Togwotee Pass 9580 .0 .0 * 34.7 35.8 97
Two Ocean Plateau 9240 .2 .0 * 35.8 40.2 89
Willow Creek 8080 .0 .0 * 48.6 48.3 101
Younts Peak 8350 -M .0 * -M 26.1 *
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Basin Index (%) * 103
MADISON-GALLATIN
Black Bear 8170 .0 .0 * 58.9 52.1 113
Canyon 7870 .0 .0 * 24.7 25.6 96
Madison Plateau 7750 .0 .0 * 42.1 38.1 110
West Yellowstone 6700 .2 .0 * -M 22.3 *
Whiskey Creek 6800 .0 .0 * 32.3 30.5 106
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Basin Index (%) * 108
YELLOWSTONE
Beartooth Lake 9360 .0 .0 * 33.6 30.6 110
Burnt Mtn 5880 .0 .0 * 33.0 27.0 122
Canyon 7870 .0 .0 * 24.7 25.6 96
Cole Creek 7850 .0 .0 * -M 27.9 *
Evening Star 9200 .0 .0 * 45.5 41.5 110
Fisher Creek 9100 -M .0 * 53.8 48.1 112
Northeast Entrance 7350 .1 .0 * 25.9 22.5 115
Parker Peak 9400 .0 .0 * 37.7 29.3 129
Sylvan Lake 8420 .0 .0 * 40.3 35.2 114
Thumb Divide 7980 .0 .0 * 27.1 27.7 98
Two Ocean Plateau 9240 .2 .0 * 35.8 40.2 89
White Mill 8700 .0 .0 * 30.8 37.4 82
Wolverine 7650 .0 .0 * 22.9 21.1 109
Younts Peak 8350 -M .0 * -M 26.1 *
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Basin Index (%) * 106
WIND RIVER
Burroughs Creek 8750 .0 -M * 24.6 -M *
Castle Creek 8400 .0 -M * 15.0 -M *
Cold Springs 9630 .0 .0 * 18.0 19.5 92
Deer Park 9700 .0 .0 * 28.3 31.9 89
Hobbs Park 10100 .0 .0 * 26.6 25.2 106
Kirwin 9550 .0 .0 * 22.6 23.2 97
Little Warm 9370 .0 .0 * 15.6 23.0 68
Owl Creek 8975 .0 .0 * 21.2 15.2 139
South Pass 9040 .0 .0 * 22.1 27.3 81
St. Lawrence Alt 8620 -M .0 * -M 18.4 *
Togwotee Pass 9580 .0 .0 * 34.7 35.8 97
Townsend Creek 8700 .0 .0 * 23.5 22.2 106
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Basin Index (%) * 95
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 28.4 29.2 97
Bear Trap Meadow 8200 .0 .0 * 19.2 18.4 104
Bone Springs Div 9350 -M .0 * 24.4 28.3 86
Grave Springs 8550 .0 .0 * 20.7 20.7 100
Kirwin 9550 .0 .0 * 22.6 23.2 97
Marquette 8760 .0 -M * 30.0 -M *
Middle Powder 7760 .0 .0 * 24.2 22.3 109
Owl Creek 8975 .0 .0 * 21.2 15.2 139
Powder River Pass 9480 .0 .0 * 20.0 24.1 83
Shell Creek 9580 .0 .0 * 24.3 25.5 95
Timber Creek 7950 .0 .0 * 23.4 18.6 126
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Basin Index (%) * 101
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 38.9 33.0 118
Evening Star 9200 .0 .0 * 45.5 41.5 110
Marquette 8760 .0 -M * 30.0 -M *
Sylvan Lake 8420 .0 .0 * 40.3 35.2 114
Sylvan Road 7120 .0 .0 * 25.4 25.9 98
Younts Peak 8350 -M .0 * -M 26.1 *
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Basin Index (%) * 111
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 19.2 18.4 104
Cloud Peak Reservoir 9860 .0 .0 * 26.7 27.4 97
Grave Springs 8550 .0 .0 * 20.7 20.7 100
Hansen Sawmill 8360 .0 .0 * 22.3 19.6 114
Middle Powder 7760 .0 .0 * 24.2 22.3 109
Powder River Pass 9480 .0 .0 * 20.0 24.1 83
Soldier Park 8720 .0 -M * 19.8 -M *
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Basin Index (%) * 100
TONGUE RIVER
Big Goose 7990 .0 .0 * 26.5 22.0 120
Bone Springs Div 9350 -M .0 * 24.4 28.3 86
Burgess Junction 7880 .0 .0 * 22.3 23.2 96
Dome Lake 8880 .0 .0 * 27.0 25.5 106
Little Goose 8870 .0 -M * 20.1 -M *
Sucker Creek 8880 .0 .0 * 28.6 27.2 105
Tie Creek 6870 .0 .0 * 27.6 24.1 115
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Basin Index (%) * 104
BELLE FOURCHE
Blind Park 6890 .0 .0 * 22.3 25.3 88
Cole Canyon 5910 .0 .0 * 31.7 23.0 138
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Basin Index (%) * 112
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 22.3 25.3 88
North Rapid Creek 6130 -M .0 * 21.8 24.5 89
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10960 .0 .0 * 40.8 34.7 118
Blackhall Mtn 9820 -M -M * 47.9 -M *
Columbine 9160 .2 .0 * 42.6 35.5 120
Divide Peak 8880 .0 .0 * 33.4 31.0 108
Joe Wright 10120 .0 .0 * 47.1 40.4 117
Laprele Creek 8375 .0 .0 * 23.0 22.1 104
Med Bow 10500 -M -M * 51.1 -M *
Never Summer 10280 .2 .0 * 32.2 -M *
North French Creek 10130 .1 .0 * 44.4 40.3 110
Old Battle 10000 .1 .0 * 49.5 48.2 103
Rawah 9020 .0 .0 * 29.3 24.2 121
Sage Creek Basin 7850 .1 .0 * 23.5 20.8 113
Sand Lake 10050 .0 .0 * 39.3 38.3 103
South Brush Creek 8440 .0 .0 * 21.1 24.9 85
Tower 10500 .0 .0 * 66.0 54.7 121
Webber Springs 9250 .0 .0 * 43.0 37.4 115
Whiskey Park 8950 .0 .0 * 45.2 39.0 116
Willow Creek Pass 9540 .2 .0 * 26.6 23.4 114
Zirkel 9340 .1 .0 * 50.8 39.3 129
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Basin Index (%) * 113
SWEETWATER
Deer Park 9700 .0 .0 * 28.3 31.9 89
Larsen Creek 9000 .0 .0 * 21.0 -M *
South Pass 9040 .0 .0 * 22.1 27.3 81
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Basin Index (%) * 85
LOWER N. PLATTE
Casper Mtn. 7900 .3 .0 * 25.7 25.8 100
Laprele Creek 8375 .0 .0 * 23.0 22.1 104
Reno Hill 8400 .0 .0 * 31.7 26.6 119
Windy Peak 7900 .0 .0 * 21.9 21.0 104
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Basin Index (%) * 107
LARAMIE RIVER
Brooklyn Lake 10240 .0 .0 * 38.8 33.1 117
Cinnabar Park 9574 .0 .0 * 37.3 35.0 107
Crow Creek 8330 .2 .0 * 20.6 23.2 89
Deadman Hill 10220 .0 .0 * 31.3 28.6 109
Rawah 9020 .0 .0 * 29.3 24.2 121
Roach 9700 .1 .0 * 36.2 30.5 119
Windy Peak 7900 .0 .0 * 21.9 21.0 104
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Basin Index (%) * 110
S. PLATTE
Black Mountain 8920 .0 -M * 23.9 -M *
Crow Creek 8330 .2 .0 * 20.6 23.2 89
Deadman Hill 10220 .0 .0 * 31.3 28.6 109
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Basin Index (%) * 100
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 24.5 22.0 111
Divide Peak 8880 .0 .0 * 33.4 31.0 108
Elk River 8700 .2 .0 * 29.8 29.6 101
Little Snake River 8915 .0 .0 * 51.1 40.4 126
Old Battle 10000 .1 .0 * 49.5 48.2 103
Sage Creek Basin 7850 .1 .0 * 23.5 20.8 113
Sandstone RS 8150 .1 .0 * 25.9 26.8 97
Whiskey Park 8950 .0 .0 * 45.2 39.0 116
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Basin Index (%) * 110
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 21.8 21.7 100
Blind Bull Sum 8650 .0 .0 * 27.3 28.3 96
East Rim Divide 7930 .0 .0 * 19.1 18.1 106
Elkhart Park G.S. 9400 .0 .0 * 23.1 21.8 106
Gros Ventre Summit 8750 .0 .0 * 20.2 21.1 96
Gunsight Pass 9820 .1 .0 * 25.8 22.8 113
Indian Creek 9425 .0 .0 * -M 31.5 *
Kendall R.S. 7740 .0 .0 * 20.1 20.8 97
Loomis Park 8240 .2 .0 * -M 25.2 *
New Fork Lake 8340 .0 .0 * 19.3 18.1 107
Pocket Creek 9360 -M -M * 22.7 -M *
Snider Basin 8060 .0 .0 * 20.2 20.2 100
Spring Creek Divide 9000 .0 .0 * 32.4 33.2 98
Triple Peak 8500 .1 .0 * 35.3 35.7 99
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Basin Index (%) * 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 21.4 -M *
Buck Pasture 9632 .0 -M * 31.4 -M *
EF Blacks Fork GS 9360 .0 -M * 22.4 -M *
Hams Fork 7840 .3 .0 * 20.6 18.1 114
Hewinta 9500 .0 .0 * 24.7 23.2 106
Hickerson Park 9122 .0 .0 * 20.9 18.9 111
Hole-in-Rock 9168 -M .0 * -M 18.4 *
Indian Creek 9425 .0 .0 * -M 31.5 *
Kelley R.S. 8180 .2 .0 * 26.0 26.0 100
Spirit Lk 10235 .0 -M * 28.9 -M *
Steel Creek Park 10158 -M .0 * 30.1 26.9 112
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Basin Index (%) * 108*
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 23.4 -M *
Bug Lake 7987 .0 .0 * 33.7 27.4 123
Burts Miller Ranch 8000 .0 -M * 12.9 -M *
Chalk Creek #1 9171 .0 .0 * 39.3 36.8 107
Hayden Fork 9130 .0 .0 * 33.6 31.0 108
Kelley R.S. 8180 .2 .0 * 26.0 26.0 100
Lily Lake 9133 .0 .0 * 24.8 26.5 94
Monte Cristo 8932 .4 .0 * 44.3 36.5 121
Salt River Summit 7640 .0 .0 * 26.2 24.4 107
Spring Creek Divide 9000 .0 .0 * 32.4 33.2 98
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Basin Index (%) * 108
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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.
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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.
