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 20 , 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 .1 .0 * 30.5 31.3 97
Black Bear 8170 -M .0 * -M 54.1 *
Blind Bull Sum 8650 .0 .0 * 28.9 30.1 96
Cottonwood Creek 7670 .0 .0 * 39.8 38.2 104
East Rim Divide 7930 .1 .0 * 20.5 19.5 105
Grand Targhee 9260 .0 .0 * 51.3 47.0 109
Granite Creek 6770 .4 .0 * 32.0 29.1 110
Grassy Lake 7265 .0 .0 * 53.1 51.3 104
Gros Ventre Summit 8750 .0 .0 * 22.0 22.9 96
Gunsight Pass 9820 .2 .0 * 27.6 25.2 110
Lewis Lake Divide 7850 .0 .0 * 52.3 49.8 105
Phillips Bench 8200 .1 .0 * 44.3 40.6 109
Salt River Summit 7640 .1 .0 * 28.2 26.1 108
Snake River Station 6920 .1 .0 * 38.1 34.4 111
Spring Creek Divide 9000 .0 .0 * 34.0 35.0 97
Thumb Divide 7980 .0 .0 * 28.2 29.2 97
Togwotee Pass 9580 .1 .0 * 37.1 37.9 98
Two Ocean Plateau 9240 .3 .0 * 38.3 42.4 90
Willow Creek 8080 .1 .0 * 51.3 50.7 101
Younts Peak 8350 .0 .0 * 27.7 28.5 97
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Basin Index (%) * 102
MADISON-GALLATIN
Black Bear 8170 -M .0 * -M 54.1 *
Canyon 7870 -M .0 * 24.9 27.1 92
Madison Plateau 7750 .0 .0 * 44.4 39.9 111
West Yellowstone 6700 .0 .0 * 26.4 23.6 112
Whiskey Creek 6800 .3 .0 * 34.4 32.2 107
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Basin Index (%) * 106
YELLOWSTONE
Beartooth Lake 9360 .0 .0 * 35.7 32.3 111
Burnt Mtn 5880 .0 .0 * 36.5 28.9 126
Canyon 7870 -M .0 * 24.9 27.1 92
Cole Creek 7850 .0 .0 * 35.5 30.2 118
Evening Star 9200 .1 .0 * 47.4 44.0 108
Fisher Creek 9100 .1 .0 * 56.8 50.7 112
Northeast Entrance 7350 .1 .0 * 28.0 24.3 115
Parker Peak 9400 .0 .0 * 39.8 31.1 128
Sylvan Lake 8420 .1 .0 * 43.7 37.2 117
Thumb Divide 7980 .0 .0 * 28.2 29.2 97
Two Ocean Plateau 9240 .3 .0 * 38.3 42.4 90
White Mill 8700 .1 .0 * 32.9 39.6 83
Wolverine 7650 .0 .0 * 24.4 22.9 107
Younts Peak 8350 .0 .0 * 27.7 28.5 97
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Basin Index (%) * 107
WIND RIVER
Burroughs Creek 8750 .0 -M * 27.3 -M *
Castle Creek 8400 .2 -M * 16.7 -M *
Cold Springs 9630 .0 .0 * 19.2 21.1 91
Deer Park 9700 .0 .0 * 29.2 34.1 86
Hobbs Park 10100 .0 .0 * 29.0 26.9 108
Kirwin 9550 .0 .0 * 25.0 25.5 98
Little Warm 9370 .0 .0 * 17.0 25.1 68
Owl Creek 8975 .0 .0 * 22.3 16.7 134
South Pass 9040 .1 .0 * 23.2 28.8 81
St. Lawrence Alt 8620 -M .0 * -M 19.6 *
Togwotee Pass 9580 .1 .0 * 37.1 37.9 98
Townsend Creek 8700 .0 .0 * 25.4 23.8 107
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Basin Index (%) * 95
BIGHORN BASIN
Bald Mtn. 9380 .4 .0 * 32.0 31.3 102
Bear Trap Meadow 8200 .0 .0 * 21.1 20.1 105
Bone Springs Div 9350 .0 .0 * 26.9 30.4 88
Grave Springs 8550 .1 .0 * 22.7 22.3 102
Kirwin 9550 .0 .0 * 25.0 25.5 98
Marquette 8760 .0 -M * 34.4 -M *
Middle Powder 7760 .0 .0 * 27.5 24.1 114
Owl Creek 8975 .0 .0 * 22.3 16.7 134
Powder River Pass 9480 .0 .0 * 22.4 26.0 86
Shell Creek 9580 .0 .0 * 27.5 27.4 100
Timber Creek 7950 .0 .0 * 25.8 20.5 126
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Basin Index (%) * 104
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 41.4 35.4 117
Evening Star 9200 .1 .0 * 47.4 44.0 108
Marquette 8760 .0 -M * 34.4 -M *
Sylvan Lake 8420 .1 .0 * 43.7 37.2 117
Sylvan Road 7120 .0 .0 * 27.9 27.9 100
Younts Peak 8350 .0 .0 * 27.7 28.5 97
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Basin Index (%) * 109
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 21.1 20.1 105
Cloud Peak Reservoir 9860 .0 .0 * 28.9 29.5 98
Grave Springs 8550 .1 .0 * 22.7 22.3 102
Hansen Sawmill 8360 .0 .0 * 23.6 21.4 110
Middle Powder 7760 .0 .0 * 27.5 24.1 114
Powder River Pass 9480 .0 .0 * 22.4 26.0 86
Soldier Park 8720 .0 -M * 21.4 -M *
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Basin Index (%) * 102
TONGUE RIVER
Big Goose 7990 .0 .0 * 28.3 24.0 118
Bone Springs Div 9350 .0 .0 * 26.9 30.4 88
Burgess Junction 7880 .1 .0 * 24.6 24.7 100
Dome Lake 8880 .0 .0 * 28.3 27.4 103
Little Goose 8870 .0 -M * 21.9 -M *
Sucker Creek 8880 .0 .0 * 32.2 28.9 111
Tie Creek 6870 -M .0 * -M 25.9 *
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Basin Index (%) * 104
BELLE FOURCHE
Blind Park 6890 .0 .0 * 23.4 27.1 86
Cole Canyon 5910 .0 .0 * 33.7 24.9 135
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Basin Index (%) * 110
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 23.4 27.1 86
North Rapid Creek 6130 -M .0 * 22.7 26.7 85
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Basin Index (%) * 86
UPPER N. PLATTE
Arapaho Ridge 10960 .0 .0 * 42.0 37.3 113
Blackhall Mtn 9820 .0 -M * 49.1 -M *
Columbine 9160 .3 .0 * 43.2 37.3 116
Divide Peak 8880 -M .0 * -M 32.9 *
Joe Wright 10120 .0 .0 * 48.4 43.0 113
Laprele Creek 8375 .1 .0 * 23.4 23.6 99
Med Bow 10500 .0 -M * 52.8 -M *
Never Summer 10280 .2 .0 * 33.1 -M *
North French Creek 10130 .1 .0 * 46.1 42.3 109
Old Battle 10000 .1 .0 * 51.9 50.7 102
Rawah 9020 .0 .0 * 29.9 26.3 114
Sage Creek Basin 7850 .1 .0 * 24.1 22.4 108
Sand Lake 10050 .0 .0 * 40.4 40.0 101
South Brush Creek 8440 .0 .0 * 21.6 26.7 81
Tower 10500 .0 .0 * 69.4 57.2 121
Webber Springs 9250 .0 .0 * 45.3 39.4 115
Whiskey Park 8950 .1 .0 * 46.7 40.9 114
Willow Creek Pass 9540 .0 .0 * 27.4 25.2 109
Zirkel 9340 .1 .0 * 52.1 42.1 124
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Basin Index (%) * 110
SWEETWATER
Deer Park 9700 .0 .0 * 29.2 34.1 86
Larsen Creek 9000 .0 .0 * 23.9 -M *
South Pass 9040 .1 .0 * 23.2 28.8 81
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Basin Index (%) * 83
LOWER N. PLATTE
Casper Mtn. 7900 .3 .0 * 26.6 27.2 98
Laprele Creek 8375 .1 .0 * 23.4 23.6 99
Reno Hill 8400 .0 .0 * 33.0 27.9 118
Windy Peak 7900 .0 .0 * 22.5 22.3 101
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Basin Index (%) * 104
LARAMIE RIVER
Brooklyn Lake 10240 .0 .0 * 39.1 34.6 113
Cinnabar Park 9574 .0 .0 * 38.6 36.9 105
Crow Creek 8330 .0 .0 * 21.9 25.1 87
Deadman Hill 10220 .1 .0 * 32.5 30.2 108
Rawah 9020 .0 .0 * 29.9 26.3 114
Roach 9700 .1 .0 * 37.0 32.5 114
Windy Peak 7900 .0 .0 * 22.5 22.3 101
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Basin Index (%) * 107
S. PLATTE
Black Mountain 8920 .1 -M * 24.4 -M *
Crow Creek 8330 .0 .0 * 21.9 25.1 87
Deadman Hill 10220 .1 .0 * 32.5 30.2 108
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Basin Index (%) * 98
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 25.2 23.6 107
Divide Peak 8880 -M .0 * -M 32.9 *
Elk River 8700 .3 .0 * 31.2 31.7 98
Little Snake River 8915 .0 .0 * 52.6 42.5 124
Old Battle 10000 .1 .0 * 51.9 50.7 102
Sage Creek Basin 7850 .1 .0 * 24.1 22.4 108
Sandstone RS 8150 .3 .0 * 27.0 28.6 94
Whiskey Park 8950 .1 .0 * 46.7 40.9 114
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Basin Index (%) * 108
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 24.2 23.4 103
Blind Bull Sum 8650 .0 .0 * 28.9 30.1 96
East Rim Divide 7930 .1 .0 * 20.5 19.5 105
Elkhart Park G.S. 9400 .0 .0 * 25.2 23.9 105
Gros Ventre Summit 8750 .0 .0 * 22.0 22.9 96
Gunsight Pass 9820 .2 .0 * 27.6 25.2 110
Indian Creek 9425 .0 .0 * -M 33.1 *
Kendall R.S. 7740 .0 .0 * 21.7 22.4 97
Loomis Park 8240 .4 .0 * 26.8 27.1 99
New Fork Lake 8340 .0 .0 * 21.1 19.7 107
Pocket Creek 9360 -M -M * 26.1 -M *
Snider Basin 8060 .0 .0 * 21.6 21.4 101
Spring Creek Divide 9000 .0 .0 * 34.0 35.0 97
Triple Peak 8500 .2 .0 * 37.4 37.4 100
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Basin Index (%) * 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 23.7 -M *
Buck Pasture 9632 .0 -M * 33.8 -M *
EF Blacks Fork GS 9360 .0 -M * 24.5 -M *
Hams Fork 7840 .0 .0 * 21.9 19.3 113
Hewinta 9500 .0 .0 * 25.8 25.3 102
Hickerson Park 9122 .0 .0 * 23.3 21.1 110
Hole-in-Rock 9168 .0 .0 * 23.2 20.6 113
Indian Creek 9425 .0 .0 * -M 33.1 *
Kelley R.S. 8180 .4 .0 * 28.2 27.4 103
Spirit Lk 10235 .0 -M * 30.9 -M *
Steel Creek Park 10158 .0 .0 * 32.4 29.3 111
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Basin Index (%) * 108
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 26.3 -M *
Bug Lake 7987 .0 .0 * 34.8 29.0 120
Burts Miller Ranch 8000 .0 -M * 13.9 -M *
Chalk Creek #1 9171 .0 .0 * 39.3 39.4 100
Hayden Fork 9130 .0 .0 * 36.3 33.5 108
Kelley R.S. 8180 .4 .0 * 28.2 27.4 103
Lily Lake 9133 .0 .0 * 27.8 28.7 97
Monte Cristo 8932 .4 .0 * 46.0 38.5 119
Salt River Summit 7640 .1 .0 * 28.2 26.1 108
Spring Creek Divide 9000 .0 .0 * 34.0 35.0 97
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Basin Index (%) * 107
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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.
