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: SEPTEMBER 2 , 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 * 47.0 30.3 155
Black Bear 8170 .1 .0 * 67.2 52.8 127
Blind Bull Sum 8650 .0 .0 * 43.3 29.1 149
Cottonwood Creek 7670 .0 .0 * 49.5 36.9 134
East Rim Divide 7930 .2 .0 * 26.6 18.7 142
Grand Targhee 9260 .0 .0 * 59.5 45.9 130
Granite Creek 6770 .0 .0 * 44.3 28.2 157
Grassy Lake 7265 .1 .0 * 67.9 50.0 136
Gros Ventre Summit 8750 .1 .0 * 32.2 21.8 148
Gunsight Pass 9820 .0 .0 * 35.3 23.9 148
Lewis Lake Divide 7850 .1 .0 * 68.8 48.7 141
Phillips Bench 8200 .0 .0 * 56.4 39.5 143
Salt River Summit 7760 .1 .0 * 33.8 25.0 135
Snake River Station 6920 .0 .0 * 44.2 33.2 133
Spring Creek Divide 9000 .2 .0 * 48.5 33.8 143
Thumb Divide 7980 .0 .0 * 34.9 28.3 123
Togwotee Pass 9580 .0 .0 * 50.4 36.6 138
Two Ocean Plateau 9240 -M .0 * -M 41.0 *
Willow Creek 8380 .0 .0 * 63.0 49.3 128
Younts Peak 8350 .0 .0 * 41.9 27.1 155
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Basin Index (%) * 139
MADISON-GALLATIN
Black Bear 8170 .1 .0 * 67.2 52.8 127
Canyon 7870 .0 .0 * 32.9 26.2 126
Madison Plateau 7750 .0 .0 * 45.6 38.8 118
West Yellowstone 6700 .1 .0 * 30.4 23.0 132
Whiskey Creek 6800 .0 .0 * 35.4 31.2 113
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Basin Index (%) * 123
YELLOWSTONE
Beartooth Lake 9360 .0 .0 * 39.2 31.3 125
Burnt Mtn 5880 .0 .0 * 27.5 27.7 99
Canyon 7870 .0 .0 * 32.9 26.2 126
Cole Creek 7850 .0 .0 * 22.6 28.7 79
Evening Star 9200 .0 .0 * 56.8 42.5 134
Fisher Creek 9100 .0 .0 * 61.3 49.2 125
Northeast Entrance 7350 .0 .0 * 29.2 23.3 125
Parker Peak 9400 .0 .0 * 49.0 30.0 163
Sylvan Lake 8420 .0 .0 * 48.7 36.0 135
Thumb Divide 7980 .0 .0 * 34.9 28.3 123
Two Ocean Plateau 9240 -M .0 * -M 41.0 *
White Mill 8700 .0 .0 * 47.9 38.4 125
Wolverine 7650 -M .0 * 30.4 21.9 139
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Basin Index (%) * 125
WIND RIVER
Burroughs Creek 8750 .0 -M * 34.2 -M *
Castle Creek 8400 .4 -M * 23.8 -M *
Cold Springs 9630 .0 .0 * 28.8 20.1 143
Deer Park 9700 .0 .0 * 51.4 33.1 155
Hobbs Park 10100 .1 .0 * 41.4 25.9 160
Kirwin 9550 .0 .0 * 35.9 24.1 149
Little Warm 9370 .1 .0 * 32.5 23.8 137
Owl Creek 8975 .0 .0 * 23.1 15.7 147
South Pass 9040 .0 .0 * 41.1 27.9 147
St. Lawrence Alt 8620 .0 .0 * 26.3 18.9 139
Togwotee Pass 9580 .0 .0 * 50.4 36.6 138
Townsend Creek 8700 .4 .0 * 35.4 22.8 155
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Basin Index (%) * 147
BIGHORN BASIN
Bald Mtn. 9380 .1 .0 * 27.7 29.8 93
Bear Trap Meadow 8200 .0 .0 * 21.0 18.9 111
Bone Springs Div 9350 .0 .0 * 31.5 28.8 109
Grave Springs 8550 .0 .0 * 17.3 21.2 82
Kirwin 9550 .0 .0 * 35.9 24.1 149
Marquette 8760 .0 -M * 30.8 -M *
Middle Powder 7760 .1 .0 * 19.0 22.8 83
Owl Creek 8975 .0 .0 * 23.1 15.7 147
Powder River Pass 9480 .0 .0 * 26.6 24.7 108
Shell Creek 9580 .0 .0 * 26.4 26.0 102
Timber Creek 7950 .1 .0 * 22.2 19.2 116
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Basin Index (%) * 108
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 54.0 34.0 159
Evening Star 9200 .0 .0 * 56.8 42.5 134
Marquette 8760 .0 -M * 30.8 -M *
Sylvan Road 7120 .0 .0 * 38.3 26.6 144
Younts Peak 8350 .0 .0 * 41.9 27.1 155
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Basin Index (%) * 147
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 21.0 18.9 111
Cloud Peak Reservoir 9860 .2 .0 * 34.8 28.0 124
Grave Springs 8550 .0 .0 * 17.3 21.2 82
Hansen Sawmill 8360 .0 .0 * -M 20.1 *
Middle Powder 7760 .1 .0 * 19.0 22.8 83
Powder River Pass 9480 .0 .0 * 26.6 24.7 108
Soldier Park 8720 .0 -M * 28.7 -M *
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Basin Index (%) * 103
TONGUE RIVER
Big Goose 7990 .1 .0 * 25.0 22.4 112
Bone Springs Div 9350 .0 .0 * 31.5 28.8 109
Burgess Junction 7880 .1 .0 * 26.3 23.6 111
Dome Lake 8880 .0 .0 * 30.2 25.9 117
Little Goose 8870 .0 -M * 30.6 -M *
Sucker Creek 8880 .0 .0 * 30.3 27.6 110
Tie Creek 6870 .0 .0 * 29.5 24.7 119
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Basin Index (%) * 113
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * 22.7 23.8 95
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Basin Index (%) * 95
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 22.9 25.9 88
North Rapid Creek 6130 .1 .0 * 22.7 25.3 90
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Basin Index (%) * 89
UPPER N. PLATTE
Arapaho Ridge 10960 -M .0 * -M 35.7 *
Blackhall Mtn 9820 .7 -M * 48.1 -M *
Columbine 9160 .3 .0 * 38.5 36.1 107
Divide Peak 8880 .0 .0 * 29.6 31.6 94
Joe Wright 10120 -M .0 * 43.0 41.5 104
Laprele Creek 8375 .0 .0 * 22.9 22.7 101
Med Bow 10500 .1 -M * 49.7 -M *
North French Creek 10130 -M .0 * 40.7 41.0 99
Never Summer 10280 -M .0 * 30.1 -M *
Old Battle 10000 -M .0 * 50.6 49.0 103
Rawah 9020 .0 .0 * 26.3 25.1 105
Sage Creek Basin 7850 -M .0 * 21.3 21.4 100
Sand Lake 10050 .0 .0 * 41.1 38.8 106
South Brush Creek 8440 .1 .0 * 19.0 25.5 75
Tower 10500 -M .0 * -M 55.5 *
Webber Springs 9250 .5 .0 * 43.2 38.0 114
Willow Creek Pass 9540 .1 .0 * 27.1 24.2 112
Zirkel 9340 .0 .0 * 54.6 40.5 135
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Basin Index (%) * 105
SWEETWATER
Deer Park 9700 .0 .0 * 51.4 33.1 155
Larsen Creek 9000 .0 .0 * 30.8 -M *
South Pass 9040 .0 .0 * 41.1 27.9 147
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Basin Index (%) * 152
LOWER N. PLATTE
Casper Mtn. 7900 .0 .0 * 25.8 26.2 98
Laprele Creek 8375 .0 .0 * 22.9 22.7 101
Reno Hill 8400 .0 .0 * 25.6 27.0 95
Windy Peak 7900 .0 .0 * 22.3 21.5 104
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Basin Index (%) * 99
LARAMIE RIVER
Brooklyn Lake 10240 .0 .0 * 32.4 33.6 96
Cinnabar Park 9574 .0 .0 * 33.7 35.8 94
Crow Creek 8330 -M .0 * 19.5 24.1 81
Deadman Hill 10220 .0 .0 * 34.2 29.2 117
Rawah 9020 .0 .0 * 26.3 25.1 105
Roach 9700 .0 .0 * 33.8 31.2 108
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Basin Index (%) * 101
S. PLATTE
Black Mountain 8920 -M -M * 25.7 -M *
Crow Creek 8330 -M .0 * 19.5 24.1 81
Deadman Hill 10220 .0 .0 * 34.2 29.2 117
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Basin Index (%) * 101
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 22.0 22.6 97
Divide Peak 8880 .0 .0 * 29.6 31.6 94
Elk River 8700 .0 .0 * 28.2 30.4 93
Little Snake River 8915 .1 .0 * 49.5 40.9 121
Old Battle 10000 -M .0 * 50.6 49.0 103
Sage Creek Basin 7850 -M .0 * 21.3 21.4 100
Sandstone RS 8150 .0 .0 * 22.6 27.5 82
Whiskey Park 8950 .0 .0 * 39.5 39.6 100
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Basin Index (%) * 100
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 30.1 22.4 134
Blind Bull Sum 8650 .0 .0 * 43.3 29.1 149
East Rim Divide 7930 .2 .0 * 26.6 18.7 142
Elkhart Park G.S. 9400 .1 .0 * 31.3 22.6 138
Gros Ventre Summit 8750 .1 .0 * 32.2 21.8 148
Gunsight Pass 9820 .0 .0 * 35.3 23.9 148
Kendall R.S. 7740 .1 .0 * 37.0 21.5 172
Loomis Park 8240 .1 .0 * 39.9 26.0 153
New Fork Lake 8340 .0 .0 * 26.6 18.8 141
Pocket Creek 9360 .0 -M * 28.9 -M *
Snider Basin 8060 .0 .0 * 31.6 20.7 153
Spring Creek Divide 9000 .2 .0 * 48.5 33.8 143
Triple Peak 8500 .0 .0 * 50.0 36.5 137
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Basin Index (%) * 146
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 22.9 -M *
Buck Pasture 9632 -M -M * 33.6 -M *
EF Blacks Fork GS 9360 -M -M * 29.2 -M *
Hams Fork 7840 -M .0 * -M 18.7 *
Hewinta 9500 -M .0 * -M 24.2 *
Hickerson Park 9122 .4 .0 * 22.0 20.1 109
Hole-in-Rock 9168 .0 .0 * 23.7 19.5 122
Indian Creek 9425 .1 .0 * 48.9 32.1 152
Kelley R.S. 8180 .2 .0 * 38.8 26.5 146
Spirit Lk 10235 .0 -M * 30.5 -M *
Steel Creek Park 10158 .0 .0 * 32.9 27.9 118
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Basin Index (%) * 132*
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 24.5 -M *
Bug Lake 7987 .8 .0 * 42.0 28.0 150
Burts Miller Ranch 8000 .0 -M * 13.7 -M *
Chalk Creek #1 9171 .0 .0 * 46.9 37.7 124
Hayden Fork 9130 .0 .0 * 37.1 32.0 116
Kelley R.S. 8180 .2 .0 * 38.8 26.5 146
Lily Lake 9133 .0 .0 * 28.9 27.4 105
Monte Cristo 8932 .3 .0 * 50.3 37.2 135
Salt River Summit 7760 .1 .0 * 33.8 25.0 135
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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.