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 SATURDAY: AUGUST 5 , 2017
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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 7030 .0 .0 * 46.6 29.2 160
Black Bear 8170 .0 .0 * 66.1 51.5 128
Blind Bull Sum 8650 .0 .0 * 42.6 27.9 153
Cottonwood Creek 7670 .0 .0 * 48.8 35.5 137
East Rim Divide 7930 .1 .0 * 26.1 17.6 148
Grand Targhee 9260 .0 .0 * 58.8 44.0 134
Granite Creek 6770 .0 .0 * 43.7 27.1 161
Grassy Lake 7265 .0 .0 * 67.1 48.6 138
Gros Ventre Summit 8750 .0 .0 * 30.2 20.6 147
Gunsight Pass 9820 .0 .0 * 33.4 22.3 150
Lewis Lake Divide 7850 .1 .0 * 68.0 47.3 144
Phillips Bench 8200 .0 .0 * 55.8 38.2 146
Salt River Summit 7760 .0 .0 * 33.2 24.0 138
Snake River Station 6920 .0 .0 * 43.7 31.8 137
Spring Creek Divide 9000 .1 .0 * 48.1 32.6 148
Thumb Divide 7980 .0 .0 * 34.3 27.2 126
Togwotee Pass 9580 .0 .0 * 49.8 35.3 141
Two Ocean Plateau 9240 -M .0 * -M 39.6 *
Willow Creek 8380 .0 .0 * 62.6 47.6 132
Younts Peak 8350 .0 .0 * 40.5 25.4 159
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Basin Index (%) * 142
MADISON-GALLATIN
Black Bear 8170 .0 .0 * 66.1 51.5 128
Canyon 7870 .0 .0 * 32.2 25.1 128
Madison Plateau 7750 .0 .0 * 44.4 37.5 118
West Yellowstone 6700 .0 .0 * 28.9 22.0 131
Whiskey Creek 6800 .0 .0 * 33.7 30.1 112
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Basin Index (%) * 124
YELLOWSTONE
Beartooth Lake 9360 .0 .0 * 37.3 30.0 124
Burnt Mtn 5880 .0 .0 * 27.1 26.3 103
Canyon 7870 .0 .0 * 32.2 25.1 128
Cole Creek 7850 .0 .0 * 22.2 27.1 82
Evening Star 9200 .0 .0 * 57.0 40.9 139
Fisher Creek 9100 .0 .0 * 59.7 47.2 126
Northeast Entrance 7350 .0 .0 * 27.5 21.9 126
Parker Peak 9400 .1 .0 * 47.8 28.8 166
Sylvan Lake 8420 .0 .0 * 47.7 34.7 137
Thumb Divide 7980 .0 .0 * 34.3 27.2 126
Two Ocean Plateau 9240 -M .0 * -M 39.6 *
White Mill 8700 .1 .0 * 46.2 36.6 126
Wolverine 7650 -M .0 * 29.6 20.5 144
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Basin Index (%) * 128
WIND RIVER
Burroughs Creek 8750 .0 -M * 34.6 -M *
Castle Creek 8400 .2 -M * 22.4 -M *
Cold Springs 9630 .0 .0 * 27.8 19.0 146
Deer Park 9700 .0 .0 * 49.7 31.3 159
Hobbs Park 10100 .1 .0 * 40.1 24.7 162
Kirwin 9550 .0 .0 * 34.6 22.4 154
Little Warm 9370 .0 .0 * 31.6 22.4 141
Owl Creek 8975 .0 .0 * 20.5 14.7 139
South Pass 9040 .0 .0 * 39.7 26.8 148
St. Lawrence Alt 8620 .0 .0 * 24.9 18.0 138
Togwotee Pass 9580 .0 .0 * 49.8 35.3 141
Townsend Creek 8700 .3 .0 * 32.9 21.7 152
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Basin Index (%) * 149
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * -M 28.7 *
Bear Trap Meadow 8200 .0 .0 * 20.0 18.0 111
Bone Springs Div 9350 .0 .0 * -M 27.6 *
Grave Springs 8550 .0 .0 * 16.7 20.2 83
Kirwin 9550 .0 .0 * 34.6 22.4 154
Marquette 8760 .0 -M * 30.1 -M *
Middle Powder 7760 .1 .0 * 18.3 21.8 84
Owl Creek 8975 .0 .0 * 20.5 14.7 139
Powder River Pass 9480 .0 .0 * 25.5 23.7 108
Shell Creek 9580 .0 .0 * 25.9 25.0 104
Timber Creek 7950 -M .0 * -M 18.0 *
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Basin Index (%) * 111
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 53.2 32.4 164
Evening Star 9200 .0 .0 * 57.0 40.9 139
Marquette 8760 .0 -M * 30.1 -M *
Sylvan Road 7120 .0 .0 * 36.9 25.4 145
Younts Peak 8350 .0 .0 * 40.5 25.4 159
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Basin Index (%) * 151
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 20.0 18.0 111
Cloud Peak Reservoir 9860 -M .0 * 33.4 26.8 125
Grave Springs 8550 .0 .0 * 16.7 20.2 83
Hansen Sawmill 8360 .0 .0 * -M 18.9 *
Middle Powder 7760 .1 .0 * 18.3 21.8 84
Powder River Pass 9480 .0 .0 * 25.5 23.7 108
Soldier Park 8720 .0 -M * 27.7 -M *
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Basin Index (%) * 103
TONGUE RIVER
Big Goose 7990 .0 .0 * 23.4 21.4 109
Bone Springs Div 9350 .0 .0 * -M 27.6 *
Burgess Junction 7880 .0 .0 * 26.2 22.7 115
Dome Lake 8880 .0 .0 * 29.3 24.9 118
Little Goose 8870 .0 -M * 29.5 -M *
Sucker Creek 8880 .0 .0 * 29.1 26.6 109
Tie Creek 6870 .0 .0 * 28.3 23.4 121
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Basin Index (%) * 115
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 21.0 22.1 95
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Basin Index (%) * 95
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 21.5 24.5 88
North Rapid Creek 6130 .0 .0 * 21.1 23.4 90
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10960 -M .0 * -M 33.8 *
Blackhall Mtn 9820 -M -M * 46.9 -M *
Columbine 9160 .2 .0 * 36.4 34.9 104
Divide Peak 8880 .0 .0 * 27.7 30.4 91
Joe Wright 10120 .4 .0 * 41.1 39.4 104
Laprele Creek 8375 .0 .0 * 21.4 21.5 100
Med Bow 10500 .0 -M * 47.9 -M *
North French Creek 10130 .1 .0 * 38.8 39.7 98
Never Summer 10280 -M .0 * 28.6 -M *
Old Battle 10000 .0 .0 * 49.1 47.6 103
Rawah 9020 .0 .0 * 25.2 23.6 107
Sage Creek Basin 7850 -M .0 * 20.1 20.2 100
Sand Lake 10050 .2 .0 * 40.7 37.7 108
South Brush Creek 8440 .0 .0 * 18.3 24.3 75
Tower 10500 -M .0 * -M 53.9 *
Webber Springs 9250 .0 .0 * 42.0 36.8 114
Willow Creek Pass 9540 .1 .0 * 25.5 22.5 113
Zirkel 9340 .7 .0 * 53.0 38.5 138
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Basin Index (%) * 105
SWEETWATER
Deer Park 9700 .0 .0 * 49.7 31.3 159
Larsen Creek 9000 .0 .0 * 29.8 -M *
South Pass 9040 .0 .0 * 39.7 26.8 148
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Basin Index (%) * 154
LOWER N. PLATTE
Casper Mtn. 7900 .0 .0 * 25.1 25.4 99
Laprele Creek 8375 .0 .0 * 21.4 21.5 100
Reno Hill 8400 .0 .0 * 25.3 26.2 97
Windy Peak 7900 .2 .0 * 21.2 20.3 104
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Basin Index (%) * 100
LARAMIE RIVER
Brooklyn Lake 10240 .3 .0 * 31.5 32.5 97
Cinnabar Park 9574 .0 .0 * 31.8 34.4 92
Crow Creek 8330 -M .0 * 18.1 22.3 81
Deadman Hill 10220 .0 .0 * 32.2 27.8 116
Rawah 9020 .0 .0 * 25.2 23.6 107
Roach 9700 .0 .0 * 32.2 29.8 108
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Basin Index (%) * 100
S. PLATTE
Black Mountain 8920 -M -M * 22.2 -M *
Crow Creek 8330 -M .0 * 18.1 22.3 81
Deadman Hill 10220 .0 .0 * 32.2 27.8 116
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Basin Index (%) * 100
LITTLE SNAKE RIVER
Battle Mountain 7440 -M .0 * 21.8 21.6 101
Divide Peak 8880 .0 .0 * 27.7 30.4 91
Elk River 8700 .0 .0 * 27.2 29.0 94
Little Snake River 8915 .1 .0 * 48.3 39.6 122
Old Battle 10000 .0 .0 * 49.1 47.6 103
Sage Creek Basin 7850 -M .0 * 20.1 20.2 100
Sandstone RS 8150 .3 .0 * 21.0 26.1 80
Whiskey Park 8950 .1 .0 * 38.8 38.4 101
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Basin Index (%) * 100
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 29.5 21.2 139
Blind Bull Sum 8650 .0 .0 * 42.6 27.9 153
East Rim Divide 7930 .1 .0 * 26.1 17.6 148
Elkhart Park G.S. 9400 .0 .0 * 30.6 21.3 144
Gros Ventre Summit 8750 .0 .0 * 30.2 20.6 147
Gunsight Pass 9820 .0 .0 * 33.4 22.3 150
Kendall R.S. 7740 .1 .0 * 36.0 20.4 176
Loomis Park 8240 .0 .0 * 38.8 24.7 157
New Fork Lake 8340 .0 .0 * 26.9 17.7 152
Pocket Creek 9360 .0 -M * -M -M *
Snider Basin 8060 .0 .0 * 31.1 19.9 156
Spring Creek Divide 9000 .1 .0 * 48.1 32.6 148
Triple Peak 8500 .0 .0 * 49.1 35.2 139
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Basin Index (%) * 150
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 20.9 -M *
Buck Pasture 9632 .0 -M * 30.7 -M *
EF Blacks Fork GS 9360 -M -M * 26.2 -M *
Hams Fork 7840 .0 .0 * 26.8 17.8 151
Hewinta 9500 .0 .0 * 24.4 22.5 108
Hickerson Park 9122 .4 .0 * 20.3 18.2 112
Hole-in-Rock 9168 .0 .0 * 21.1 17.6 120
Indian Creek 9425 .0 .0 * 48.6 31.1 156
Kelley R.S. 8180 .1 .0 * 37.5 25.6 146
Spirit Lk 10235 .0 -M * 27.5 -M *
Steel Creek Park 10158 -M .0 * 29.0 26.2 111
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Basin Index (%) * 131
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 23.4 -M *
Bug Lake 7987 .7 .0 * 40.5 26.9 151
Burts Miller Ranch 8000 .0 -M * 12.9 -M *
Chalk Creek #1 9171 .0 .0 * 44.0 36.1 122
Hayden Fork 9130 .0 .0 * 35.0 30.4 115
Kelley R.S. 8180 .1 .0 * 37.5 25.6 146
Lily Lake 9133 .0 .0 * 27.1 25.8 105
Monte Cristo 8932 .3 .0 * 48.8 35.9 136
Salt River Summit 7760 .0 .0 * 33.2 24.0 138
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Basin Index (%) * 130
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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.
