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 MONDAY: SEPTEMBER 30 , 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 * 33.0 31.8 104
Black Bear 8170 .6 .0 * -M 54.7 *
Blind Bull Sum 8650 .5 .0 * 31.0 30.7 101
Cottonwood Creek 7670 .0 .0 * 42.5 38.9 109
East Rim Divide 7930 .0 .0 * 22.3 19.8 113
Grand Targhee 9260 2.1 .0 * 55.4 47.5 117
Granite Creek 6770 .0 .0 * 34.1 29.5 116
Grassy Lake 7265 .0 .0 * 56.1 52.0 108
Gros Ventre Summit 8750 .2 .0 * 24.7 23.5 105
Gunsight Pass 9820 .7 .0 * 30.1 25.6 118
Lewis Lake Divide 7850 .0 .0 * 54.1 50.4 107
Phillips Bench 8200 .7 .0 * 46.7 41.2 113
Salt River Summit 7640 .0 .0 * 30.2 26.8 113
Snake River Station 6920 .1 .0 * 40.1 34.7 116
Spring Creek Divide 9000 .0 .0 * 36.0 35.6 101
Thumb Divide 7980 .0 .0 * 29.7 29.5 101
Togwotee Pass 9580 1.6 .0 * 40.7 38.6 105
Two Ocean Plateau 9240 1.2 .0 * 41.2 42.9 96
Willow Creek 8080 .2 .0 * 54.6 51.7 106
Younts Peak 8350 .6 .0 * 29.2 29.2 100
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Basin Index (%) * 108
MADISON-GALLATIN
Black Bear 8170 .6 .0 * -M 54.7 *
Canyon 7870 .0 .0 * 26.3 27.6 95
Madison Plateau 7750 .5 .0 * 46.0 40.3 114
West Yellowstone 6700 .0 .0 * 27.4 23.8 115
Whiskey Creek 6800 .5 .0 * 35.9 32.7 110
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Basin Index (%) * 109
YELLOWSTONE
Beartooth Lake 9360 .2 .0 * 37.8 32.9 115
Burnt Mtn 5880 .0 .0 * 39.8 29.5 135
Canyon 7870 .0 .0 * 26.3 27.6 95
Cole Creek 7850 .6 .0 * 38.4 31.1 123
Evening Star 9200 .5 .0 * 49.9 44.8 111
Fisher Creek 9100 1.0 .0 * 60.6 51.6 117
Northeast Entrance 7350 .1 .0 * 30.2 24.9 121
Parker Peak 9400 .0 .0 * 42.4 31.8 133
Sylvan Lake 8420 .6 .0 * 47.5 38.0 125
Thumb Divide 7980 .0 .0 * 29.7 29.5 101
Two Ocean Plateau 9240 1.2 .0 * 41.2 42.9 96
White Mill 8700 .9 .0 * 35.4 40.3 88
Wolverine 7650 .0 .0 * 26.8 23.4 115
Younts Peak 8350 .6 .0 * 29.2 29.2 100
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Basin Index (%) * 112
WIND RIVER
Burroughs Creek 8750 .5 -M * -M -M *
Castle Creek 8400 .2 -M * 18.7 -M *
Cold Springs 9630 -M .0 * -M 21.6 *
Deer Park 9700 .1 .0 * -M 34.9 *
Hobbs Park 10100 .3 .0 * 29.8 27.7 108
Kirwin 9550 -M .0 * -M 26.2 *
Little Warm 9370 1.2 .0 * 18.8 25.9 73
Owl Creek 8975 -M .0 * -M 17.2 *
South Pass 9040 .0 .0 * 23.7 29.5 80
St. Lawrence Alt 8620 -M .0 * -M 20.2 *
Togwotee Pass 9580 1.6 .0 * 40.7 38.6 105
Townsend Creek 8700 .0 .0 * 26.5 24.6 108
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Basin Index (%) * 95*
BIGHORN BASIN
Bald Mtn. 9380 1.7 .0 * 34.7 32.2 108
Bear Trap Meadow 8200 .0 .0 * 21.8 20.8 105
Bone Springs Div 9350 .0 .0 * -M 31.4 *
Grave Springs 8550 .0 .0 * 23.9 23.0 104
Kirwin 9550 -M .0 * -M 26.2 *
Marquette 8760 .0 -M * 36.5 -M *
Middle Powder 7760 .0 .0 * 28.9 25.0 116
Owl Creek 8975 -M .0 * -M 17.2 *
Powder River Pass 9480 .3 .0 * 23.0 26.7 86
Shell Creek 9580 .8 .0 * 28.4 28.3 100
Timber Creek 7950 .3 .0 * 27.8 21.1 132
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Basin Index (%) * 106
SHOSHONE RIVER
Blackwater 9780 1.2 .0 * 44.8 36.2 124
Evening Star 9200 .5 .0 * 49.9 44.8 111
Marquette 8760 .0 -M * 36.5 -M *
Sylvan Lake 8420 .6 .0 * 47.5 38.0 125
Sylvan Road 7120 .0 .0 * 30.8 28.2 109
Younts Peak 8350 .6 .0 * 29.2 29.2 100
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Basin Index (%) * 115
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 21.8 20.8 105
Cloud Peak Reservoir 9860 .0 .0 * 30.6 30.3 101
Grave Springs 8550 .0 .0 * 23.9 23.0 104
Hansen Sawmill 8360 -M .0 * -M 21.8 *
Middle Powder 7760 .0 .0 * 28.9 25.0 116
Powder River Pass 9480 .3 .0 * 23.0 26.7 86
Soldier Park 8720 .0 -M * 22.6 -M *
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Basin Index (%) * 102
TONGUE RIVER
Big Goose 7990 .0 .0 * 29.6 24.6 120
Bone Springs Div 9350 .0 .0 * -M 31.4 *
Burgess Junction 7880 .1 .0 * 26.5 25.6 104
Dome Lake 8880 .0 .0 * 28.6 28.3 101
Little Goose 8870 .0 -M * 22.9 -M *
Sucker Creek 8880 .0 .0 * 33.4 29.9 112
Tie Creek 6870 -M .0 * -M 26.7 *
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Basin Index (%) * 109
BELLE FOURCHE
Blind Park 6890 .0 .0 * 24.1 27.5 88
Cole Canyon 5910 .0 .0 * -M 25.3 *
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Basin Index (%) * 88
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 24.1 27.5 88
North Rapid Creek 6130 -M .0 * -M 27.2 *
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Basin Index (%) * 88
UPPER N. PLATTE
Arapaho Ridge 10960 .0 .0 * 42.2 38.3 110
Blackhall Mtn 9820 .0 -M * 49.1 -M *
Columbine 9160 .3 .0 * 43.4 38.1 114
Divide Peak 8880 -M .0 * -M 33.8 *
Joe Wright 10120 .0 .0 * 48.6 44.2 110
Laprele Creek 8375 .0 .0 * 23.6 24.2 98
Med Bow 10500 .0 -M * 53.1 -M *
Never Summer 10280 .2 .0 * 33.3 -M *
North French Creek 10130 .2 .0 * 46.4 43.2 107
Old Battle 10000 .1 .0 * 51.5 51.8 99
Rawah 9020 .0 .0 * 29.9 27.1 110
Sage Creek Basin 7850 .2 .0 * 24.5 23.0 107
Sand Lake 10050 .0 .0 * 40.7 40.8 100
South Brush Creek 8440 .0 .0 * 21.8 27.5 79
Tower 10500 .0 .0 * 68.6 58.3 118
Webber Springs 9250 .1 .0 * 45.3 40.5 112
Whiskey Park 8950 -M .0 * 46.7 41.7 112
Willow Creek Pass 9540 .0 .0 * 27.7 26.0 107
Zirkel 9340 .1 .0 * -M 43.2 *
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Basin Index (%) * 107
SWEETWATER
Deer Park 9700 .1 .0 * -M 34.9 *
Larsen Creek 9000 .0 .0 * 25.4 -M *
South Pass 9040 .0 .0 * 23.7 29.5 80
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Basin Index (%) * 80*
LOWER N. PLATTE
Casper Mtn. 7900 .5 .0 * 26.1 27.8 94
Laprele Creek 8375 .0 .0 * 23.6 24.2 98
Reno Hill 8400 .1 .0 * 33.0 28.7 115
Windy Peak 7900 .1 .0 * 22.5 22.9 98
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Basin Index (%) * 102
LARAMIE RIVER
Brooklyn Lake 10240 .0 .0 * 39.2 35.3 111
Cinnabar Park 9574 .0 .0 * 38.8 37.9 102
Crow Creek 8330 .0 .0 * 22.4 25.8 87
Deadman Hill 10220 .1 .0 * 32.6 31.0 105
Rawah 9020 .0 .0 * 29.9 27.1 110
Roach 9700 .1 .0 * 37.0 33.3 111
Windy Peak 7900 .1 .0 * 22.5 22.9 98
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Basin Index (%) * 104
S. PLATTE
Black Mountain 8920 .1 -M * 24.4 -M *
Crow Creek 8330 .0 .0 * 22.4 25.8 87
Deadman Hill 10220 .1 .0 * 32.6 31.0 105
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Basin Index (%) * 97
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 25.0 24.2 103
Divide Peak 8880 -M .0 * -M 33.8 *
Elk River 8700 .4 .0 * 30.9 32.3 96
Little Snake River 8915 .0 .0 * 52.7 43.6 121
Old Battle 10000 .1 .0 * 51.5 51.8 99
Sage Creek Basin 7850 .2 .0 * 24.5 23.0 107
Sandstone RS 8150 .3 .0 * 26.9 29.3 92
Whiskey Park 8950 -M .0 * 46.7 41.7 112
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Basin Index (%) * 105
UPPER GREEN RIVER
Big Sandy Opening 9080 .2 .0 * 25.8 24.1 107
Blind Bull Sum 8650 .5 .0 * 31.0 30.7 101
East Rim Divide 7930 .0 .0 * 22.3 19.8 113
Elkhart Park G.S. 9400 .0 .0 * 26.5 24.7 107
Gros Ventre Summit 8750 .2 .0 * 24.7 23.5 105
Gunsight Pass 9820 .7 .0 * 30.1 25.6 118
Indian Creek 9425 .0 .0 * -M 33.7 *
Kendall R.S. 7740 .0 .0 * 23.7 22.8 104
Loomis Park 8240 .4 .0 * -M 27.7 *
New Fork Lake 8340 .0 .0 * 22.8 20.1 113
Pocket Creek 9360 -M -M * 27.4 -M *
Snider Basin 8060 .0 .0 * 22.6 21.9 103
Spring Creek Divide 9000 .0 .0 * 36.0 35.6 101
Triple Peak 8500 .1 .0 * 39.5 38.0 104
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Basin Index (%) * 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 -M -M * -M -M *
Buck Pasture 9632 .0 -M * 34.8 -M *
EF Blacks Fork GS 9360 .0 -M * 25.3 -M *
Hams Fork 7840 .0 .0 * 21.6 19.7 110
Hewinta 9500 .1 .0 * 26.2 25.9 101
Hickerson Park 9122 .0 .0 * 24.4 21.6 113
Hole-in-Rock 9168 -M .0 * -M 21.1 *
Indian Creek 9425 .0 .0 * -M 33.7 *
Kelley R.S. 8180 .0 .0 * 29.5 27.9 106
Spirit Lk 10235 .0 -M * 32.6 -M *
Steel Creek Park 10158 .0 .0 * 33.1 30.0 110
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Basin Index (%) * 108*
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 27.8 -M *
Bug Lake 7987 .0 .0 * 36.1 29.7 122
Burts Miller Ranch 8000 .0 -M * 14.4 -M *
Chalk Creek #1 9171 .2 .0 * 39.3 40.2 98
Hayden Fork 9130 .0 .0 * 37.9 34.2 111
Kelley R.S. 8180 .0 .0 * 29.5 27.9 106
Lily Lake 9133 .2 .0 * 28.8 29.3 98
Monte Cristo 8932 .4 .0 * 48.1 39.2 123
Salt River Summit 7640 .0 .0 * 30.2 26.8 113
Spring Creek Divide 9000 .0 .0 * 36.0 35.6 101
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Basin Index (%) * 109
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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.
