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: AUGUST 2 , 2018
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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 * 31.7 29.1 109
Black Bear 8170 .1 .0 * 55.2 51.3 108
Blind Bull Sum 8650 .0 .0 * 29.8 27.7 108
Cottonwood Creek 7670 .0 .0 * 37.2 35.4 105
East Rim Divide 7930 .2 .0 * 18.9 17.5 108
Grand Targhee 9260 .0 .0 * 49.3 43.9 112
Granite Creek 6770 .0 .0 * 31.1 27.0 115
Grassy Lake 7265 .1 .0 * 48.7 48.5 100
Gros Ventre Summit 8750 -M .0 * 24.0 20.5 117
Gunsight Pass 9820 -M .0 * 26.5 22.1 120
Lewis Lake Divide 7850 .0 .0 * 53.4 47.2 113
Phillips Bench 8200 -M .0 * 40.3 38.0 106
Salt River Summit 7640 .0 .0 * 18.1 23.9 76
Snake River Station 6920 .0 .0 * 32.9 31.7 104
Spring Creek Divide 9000 -M .0 * 32.6 32.5 100
Thumb Divide 7980 .1 .0 * 28.0 27.1 103
Togwotee Pass 9580 .0 .0 * 45.3 35.1 129
Two Ocean Plateau 9240 .1 .0 * 43.9 39.5 111
Willow Creek 8080 .0 .0 * 48.2 47.5 101
Younts Peak 8350 -M .0 * -M 25.3 *
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Basin Index (%) * 108
MADISON-GALLATIN
Black Bear 8170 .1 .0 * 55.2 51.3 108
Canyon 7870 -M .0 * 27.7 25.0 111
Madison Plateau 7750 .0 .0 * 39.8 37.4 106
West Yellowstone 6700 .1 .0 * 25.9 21.8 119
Whiskey Creek 6800 .0 .0 * 30.4 30.0 101
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Basin Index (%) * 108
YELLOWSTONE
Beartooth Lake 9360 .0 .0 * 46.2 29.9 155
Burnt Mtn 5880 .0 .0 * 27.0 26.2 103
Canyon 7870 -M .0 * 27.7 25.0 111
Cole Creek 7850 .0 .0 * 26.8 26.9 100
Evening Star 9200 -M .0 * 58.1 40.7 143
Fisher Creek 9100 .0 .0 * 61.2 47.0 130
Northeast Entrance 7350 .0 .0 * 28.1 21.7 129
Parker Peak 9400 .0 .0 * 41.8 28.7 146
Sylvan Lake 8420 .0 .0 * 40.9 34.5 119
Thumb Divide 7980 .1 .0 * 28.0 27.1 103
Two Ocean Plateau 9240 .1 .0 * 43.9 39.5 111
White Mill 8700 .1 .0 * 42.0 36.5 115
Wolverine 7650 .0 .0 * 30.6 20.4 150
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Basin Index (%) * 124
WIND RIVER
Burroughs Creek 8750 .0 -M * 30.2 -M *
Castle Creek 8400 .2 -M * 19.6 -M *
Cold Springs 9630 .0 .0 * 18.9 18.9 100
Deer Park 9700 .0 .0 * 24.1 31.1 77
Hobbs Park 10100 .1 .0 * 25.0 24.5 102
Kirwin 9550 .0 .0 * 28.0 22.2 126
Little Warm 9370 .0 .0 * 26.0 22.3 117
Owl Creek 8975 .0 .0 * 18.3 14.5 126
South Pass 9040 .1 .0 * 16.4 26.6 62
St. Lawrence Alt 8620 .0 .0 * 16.7 17.9 93
Togwotee Pass 9580 .0 .0 * 45.3 35.1 129
Townsend Creek 8700 .0 .0 * 20.3 21.6 94
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Basin Index (%) * 102
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 27.5 28.5 96
Bear Trap Meadow 8200 .0 .0 * 16.3 17.9 91
Bone Springs Div 9350 .0 .0 * 26.7 27.4 97
Grave Springs 8550 .1 .0 * 16.4 20.1 82
Kirwin 9550 .0 .0 * 28.0 22.2 126
Marquette 8760 .0 -M * 21.9 -M *
Middle Powder 7760 .0 .0 * 15.1 21.7 70
Owl Creek 8975 .0 .0 * 18.3 14.5 126
Powder River Pass 9480 .0 .0 * 26.8 23.5 114
Shell Creek 9580 .0 .0 * 28.9 24.9 116
Timber Creek 7950 .0 .0 * 9.7 17.8 54
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Basin Index (%) * 98
SHOSHONE RIVER
Blackwater 9780 -M .0 * 43.2 32.2 134
Evening Star 9200 -M .0 * 58.1 40.7 143
Marquette 8760 .0 -M * 21.9 -M *
Sylvan Road 7120 .0 .0 * 31.3 25.3 124
Younts Peak 8350 -M .0 * -M 25.3 *
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Basin Index (%) * 135
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 16.3 17.9 91
Cloud Peak Reservoir 9860 -M .0 * 27.9 26.6 105
Grave Springs 8550 .1 .0 * 16.4 20.1 82
Hansen Sawmill 8360 .0 .0 * 21.2 18.8 113
Middle Powder 7760 .0 .0 * 15.1 21.7 70
Powder River Pass 9480 .0 .0 * 26.8 23.5 114
Soldier Park 8720 .1 -M * 20.5 -M *
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Basin Index (%) * 96
TONGUE RIVER
Big Goose 7990 .0 .0 * 19.4 21.4 91
Bone Springs Div 9350 .0 .0 * 26.7 27.4 97
Burgess Junction 7880 .0 .0 * -M 22.4 *
Dome Lake 8880 .1 .0 * 27.1 24.7 110
Little Goose 8870 -M -M * 23.5 -M *
Sucker Creek 8880 .0 .0 * 24.8 26.4 94
Tie Creek 6870 .0 .0 * 20.1 23.2 87
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Basin Index (%) * 96
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 23.3 21.9 106
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Basin Index (%) * 106
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 21.8 24.3 90
North Rapid Creek 6130 .0 .0 * 20.4 23.1 88
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10960 .1 .0 * 27.3 33.6 81
Blackhall Mtn 9820 -M -M * 33.6 -M *
Columbine 9160 .3 .0 * 31.3 34.8 90
Divide Peak 8880 .0 .0 * 22.7 30.4 75
Joe Wright 10120 .0 .0 * 39.2 39.1 100
Laprele Creek 8375 .0 .0 * 16.8 21.4 79
Med Bow 10500 .0 -M * 43.4 -M *
North French Creek 10130 .0 .0 * 35.7 39.5 90
Never Summer 10280 .0 .0 * 23.8 -M *
Old Battle 10000 .0 .0 * 28.9 47.5 61
Rawah 9020 .1 .0 * 20.3 23.3 87
Sage Creek Basin 7850 .0 .0 * 13.4 20.1 67
Sand Lake 10050 .0 .0 * 33.7 37.4 90
South Brush Creek 8440 .2 .0 * 16.5 24.2 68
Tower 10500 .0 .0 * 46.3 53.7 86
Webber Springs 9250 .0 .0 * 26.0 36.7 71
Willow Creek Pass 9540 .0 .0 * 18.9 22.4 84
Zirkel 9340 .0 .0 * 38.3 38.4 100
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Basin Index (%) * 83
SWEETWATER
Deer Park 9700 .0 .0 * 24.1 31.1 77
Larsen Creek 9000 .0 .0 * 18.8 -M *
South Pass 9040 .1 .0 * 16.4 26.6 62
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Basin Index (%) * 70
LOWER N. PLATTE
Casper Mtn. 7900 .0 .0 * 17.0 25.3 67
Laprele Creek 8375 .0 .0 * 16.8 21.4 79
Reno Hill 8400 .0 .0 * 22.1 26.1 85
Windy Peak 7900 .0 .0 * 17.5 20.2 87
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Basin Index (%) * 79
LARAMIE RIVER
Brooklyn Lake 10240 .1 .0 * 33.5 32.4 103
Cinnabar Park 9574 .0 .0 * 31.3 34.2 92
Crow Creek 8330 .0 .0 * 20.8 22.1 94
Deadman Hill 10220 .0 .0 * 28.1 27.7 101
Rawah 9020 .1 .0 * 20.3 23.3 87
Roach 9700 .0 .0 * 25.0 29.7 84
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Basin Index (%) * 94
S. PLATTE
Black Mountain 8920 -M -M * 22.3 -M *
Crow Creek 8330 .0 .0 * 20.8 22.1 94
Deadman Hill 10220 .0 .0 * 28.1 27.7 101
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Basin Index (%) * 98
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 15.1 21.5 70
Divide Peak 8880 .0 .0 * 22.7 30.4 75
Elk River 8700 .1 .0 * 20.8 28.8 72
Little Snake River 8915 .0 .0 * 32.9 39.4 84
Old Battle 10000 .0 .0 * 28.9 47.5 61
Sage Creek Basin 7850 .0 .0 * 13.4 20.1 67
Sandstone RS 8150 .2 .0 * 12.0 26.0 46
Whiskey Park 8950 .0 .0 * 30.7 38.2 80
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Basin Index (%) * 70
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 21.4 21.1 101
Blind Bull Sum 8650 .0 .0 * 29.8 27.7 108
East Rim Divide 7930 .2 .0 * 18.9 17.5 108
Elkhart Park G.S. 9400 .0 .0 * 20.0 21.1 95
Gros Ventre Summit 8750 -M .0 * 24.0 20.5 117
Gunsight Pass 9820 -M .0 * 26.5 22.1 120
Kendall R.S. 7740 .0 .0 * 23.9 20.2 118
Loomis Park 8240 .1 .0 * -M 24.6 *
New Fork Lake 8340 .0 .0 * 19.5 17.5 111
Pocket Creek 9360 -M -M * 18.9 -M *
Snider Basin 8060 .0 .0 * 19.8 19.8 100
Spring Creek Divide 9000 -M .0 * 32.6 32.5 100
Triple Peak 8500 -M .0 * 41.2 35.0 118
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Basin Index (%) * 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 13.3 -M *
Buck Pasture 9632 .0 -M * 20.5 -M *
EF Blacks Fork GS 9360 .0 -M * 14.9 -M *
Hams Fork 7840 .0 .0 * 16.5 17.7 93
Hewinta 9500 .0 .0 * 17.0 22.3 76
Hickerson Park 9122 .4 .0 * 15.4 17.9 86
Hole-in-Rock 9168 .0 .0 * 15.6 17.4 90
Indian Creek 9425 .1 .0 * -M 31.0 *
Kelley R.S. 8180 .1 .0 * 20.9 25.5 82
Spirit Lk 10235 .0 -M * 18.6 -M *
Steel Creek Park 10158 -M .0 * 20.4 26.0 78
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Basin Index (%) * 83
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 14.8 -M *
Bug Lake 7987 .0 .0 * 22.4 26.9 83
Burts Miller Ranch 8000 .0 -M * 8.5 -M *
Chalk Creek #1 9171 .0 .0 * 20.3 35.9 57
Hayden Fork 9130 .0 .0 * 22.1 30.2 73
Kelley R.S. 8180 .1 .0 * 20.9 25.5 82
Lily Lake 9133 .0 .0 * 16.8 25.7 65
Monte Cristo 8932 .3 .0 * 28.2 35.8 79
Salt River Summit 7640 .0 .0 * 18.1 23.9 76
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Basin Index (%) * 73
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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.