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 SUNDAY: JULY 23 , 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 * 46.5 28.7 162
Black Bear 8170 .0 .0 * 65.7 50.8 129
Blind Bull Sum 8650 .0 .0 * 42.5 27.2 156
Cottonwood Creek 7670 .0 .0 * 48.6 34.8 140
East Rim Divide 7930 .1 .0 * 26.2 17.1 153
Grand Targhee 9260 .0 .0 * 57.7 43.5 133
Granite Creek 6770 .0 .0 * 43.7 26.6 164
Grassy Lake 7265 .0 .0 * 67.0 48.1 139
Gros Ventre Summit 8750 .0 .0 * 29.9 19.8 151
Gunsight Pass 9820 .0 .0 * 33.1 21.6 153
Lewis Lake Divide 7850 .0 .0 * 67.4 46.7 144
Phillips Bench 8200 .0 .0 * 55.4 37.5 148
Salt River Summit 7760 .0 .0 * 33.2 23.4 142
Snake River Station 6920 .0 .0 * 43.5 31.2 139
Spring Creek Divide 9000 .0 .0 * 47.9 32.0 150
Thumb Divide 7980 .0 .0 * 34.1 26.8 127
Togwotee Pass 9580 .0 .0 * 49.1 34.4 143
Two Ocean Plateau 9240 -M .0 * -M 38.8 *
Willow Creek 8380 .0 .0 * 62.6 46.7 134
Younts Peak 8350 .0 .0 * 40.0 24.5 163
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Basin Index (%) * 144
MADISON-GALLATIN
Black Bear 8170 .0 .0 * 65.7 50.8 129
Canyon 7870 .0 .0 * 31.7 24.4 130
Madison Plateau 7750 .0 .0 * 44.0 37.0 119
West Yellowstone 6700 .0 .0 * 28.4 21.5 132
Whiskey Creek 6800 .0 .0 * 33.8 29.6 114
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Basin Index (%) * 125
YELLOWSTONE
Beartooth Lake 9360 .0 .0 * 36.3 29.3 124
Burnt Mtn 5880 .0 .0 * 27.1 25.4 107
Canyon 7870 .0 .0 * 31.7 24.4 130
Cole Creek 7850 .0 .0 * 21.9 26.2 84
Evening Star 9200 .0 .0 * 55.9 40.0 140
Fisher Creek 9100 .0 .0 * 59.0 46.2 128
Northeast Entrance 7350 .0 .0 * 27.0 21.0 129
Parker Peak 9400 .1 .0 * 45.6 28.1 162
Sylvan Lake 8420 .0 .0 * 47.3 34.0 139
Thumb Divide 7980 .0 .0 * 34.1 26.8 127
Two Ocean Plateau 9240 -M .0 * -M 38.8 *
White Mill 8700 .0 .0 * 44.9 35.7 126
Wolverine 7650 -M .0 * 27.8 19.7 141
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Basin Index (%) * 129
WIND RIVER
Burroughs Creek 8750 .0 -M * 34.1 -M *
Castle Creek 8400 .1 -M * 21.9 -M *
Cold Springs 9630 .0 .0 * 26.9 18.3 147
Deer Park 9700 .0 .0 * 49.5 30.5 162
Hobbs Park 10100 .0 .0 * 40.7 23.9 170
Kirwin 9550 .0 .0 * 33.9 21.2 160
Little Warm 9370 .0 .0 * 31.0 21.6 144
Owl Creek 8975 .0 .0 * 20.1 13.8 146
South Pass 9040 .0 .0 * 39.7 26.2 152
St. Lawrence Alt 8620 .0 .0 * 24.8 17.3 143
Togwotee Pass 9580 .0 .0 * 49.1 34.4 143
Townsend Creek 8700 .1 .0 * 33.2 21.0 158
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Basin Index (%) * 153
BIGHORN BASIN
Bald Mtn. 9380 .0 .0 * 26.4 27.9 95
Bear Trap Meadow 8200 .0 .0 * 19.9 17.3 115
Bone Springs Div 9350 .0 .0 * 27.7 26.7 104
Grave Springs 8550 .1 .0 * 16.3 19.4 84
Kirwin 9550 .0 .0 * 33.9 21.2 160
Marquette 8760 .0 -M * 29.5 -M *
Middle Powder 7760 .0 .0 * 17.9 21.0 85
Owl Creek 8975 .0 .0 * 20.1 13.8 146
Powder River Pass 9480 .0 .0 * 23.5 22.8 103
Shell Creek 9580 .0 .0 * 25.2 24.3 104
Timber Creek 7950 .0 .0 * 21.0 17.0 124
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Basin Index (%) * 110
SHOSHONE RIVER
Blackwater 9780 .0 .0 * 51.8 31.5 164
Evening Star 9200 .0 .0 * 55.9 40.0 140
Marquette 8760 .0 -M * 29.5 -M *
Sylvan Road 7120 .0 .0 * 36.3 24.9 146
Younts Peak 8350 .0 .0 * 40.0 24.5 163
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Basin Index (%) * 152
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * 19.9 17.3 115
Cloud Peak Reservoir 9860 .0 .0 * 32.6 25.8 126
Grave Springs 8550 .1 .0 * 16.3 19.4 84
Hansen Sawmill 8360 .0 .0 * -M 18.0 *
Middle Powder 7760 .0 .0 * 17.9 21.0 85
Powder River Pass 9480 .0 .0 * 23.5 22.8 103
Soldier Park 8720 .0 -M * 26.6 -M *
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Basin Index (%) * 104
TONGUE RIVER
Big Goose 7990 .0 .0 * 23.6 20.8 113
Bone Springs Div 9350 .0 .0 * 27.7 26.7 104
Burgess Junction 7880 .0 .0 * 25.0 21.9 114
Dome Lake 8880 .0 .0 * 28.7 24.1 119
Little Goose 8870 .0 -M * 28.7 -M *
Sucker Creek 8880 .0 .0 * 28.3 25.9 109
Tie Creek 6870 .0 .0 * 27.9 22.7 123
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Basin Index (%) * 113
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 19.1 21.0 91
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Basin Index (%) * 91
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 20.0 23.6 85
North Rapid Creek 6130 .0 .0 * 19.3 21.9 88
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Basin Index (%) * 86
UPPER N. PLATTE
Arapaho Ridge 10960 .0 .0 * 34.2 32.9 104
Blackhall Mtn 9820 -M -M * 46.4 -M *
Columbine 9160 .3 .0 * 36.3 34.1 106
Divide Peak 8880 .0 .0 * 27.4 29.8 92
Joe Wright 10120 -M .0 * 38.8 38.2 102
Laprele Creek 8375 .0 .0 * 19.8 20.9 95
Med Bow 10500 .0 -M * 47.2 -M *
North French Creek 10130 -M .0 * 38.4 38.8 99
Never Summer 10280 .0 .0 * 27.1 -M *
Old Battle 10000 -M .0 * 48.8 46.8 104
Rawah 9020 .1 .0 * 24.6 22.5 109
Sage Creek Basin 7850 -M .0 * 19.7 19.7 100
Sand Lake 10050 -M .0 * 39.6 36.9 107
South Brush Creek 8440 .0 .0 * 17.9 23.8 75
Tower 10500 .0 .0 * 59.7 53.0 113
Webber Springs 9250 .0 .0 * 41.6 35.9 116
Willow Creek Pass 9540 .1 .0 * 24.5 21.6 113
Zirkel 9340 .6 .0 * 52.2 37.8 138
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Basin Index (%) * 106
SWEETWATER
Deer Park 9700 .0 .0 * 49.5 30.5 162
Larsen Creek 9000 .0 .0 * 29.6 -M *
South Pass 9040 .0 .0 * 39.7 26.2 152
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Basin Index (%) * 157
LOWER N. PLATTE
Casper Mtn. 7900 .0 .0 * 24.1 24.8 97
Laprele Creek 8375 .0 .0 * 19.8 20.9 95
Reno Hill 8400 .0 .0 * 23.3 25.6 91
Windy Peak 7900 .2 .0 * 20.2 19.4 104
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Basin Index (%) * 96
LARAMIE RIVER
Brooklyn Lake 10240 -M .0 * 31.6 31.7 100
Cinnabar Park 9574 .0 .0 * 31.2 33.7 93
Crow Creek 8330 -M .0 * 17.4 20.6 84
Deadman Hill 10220 .0 .0 * 31.3 26.8 117
Rawah 9020 .1 .0 * 24.6 22.5 109
Roach 9700 .0 .0 * 29.8 28.9 103
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Basin Index (%) * 101
S. PLATTE
Black Mountain 8920 -M -M * 21.4 -M *
Crow Creek 8330 -M .0 * 17.4 20.6 84
Deadman Hill 10220 .0 .0 * 31.3 26.8 117
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Basin Index (%) * 103
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 21.5 21.1 102
Divide Peak 8880 .0 .0 * 27.4 29.8 92
Elk River 8700 .0 .0 * 26.2 28.1 93
Little Snake River 8915 .1 .0 * 48.2 39.0 124
Old Battle 10000 -M .0 * 48.8 46.8 104
Sage Creek Basin 7850 -M .0 * 19.7 19.7 100
Sandstone RS 8150 .1 .0 * 19.7 25.4 78
Whiskey Park 8950 .1 .0 * 38.6 37.8 102
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Basin Index (%) * 101
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 29.2 20.6 142
Blind Bull Sum 8650 .0 .0 * 42.5 27.2 156
East Rim Divide 7930 .1 .0 * 26.2 17.1 153
Elkhart Park G.S. 9400 .0 .0 * 30.1 20.7 145
Gros Ventre Summit 8750 .0 .0 * 29.9 19.8 151
Gunsight Pass 9820 .0 .0 * 33.1 21.6 153
Kendall R.S. 7740 .0 .0 * 35.8 19.9 180
Loomis Park 8240 .0 .0 * 38.5 24.0 160
New Fork Lake 8340 .0 .0 * 26.9 17.1 157
Pocket Creek 9360 .0 -M * -M -M *
Snider Basin 8060 .0 .0 * 30.8 19.4 159
Spring Creek Divide 9000 .0 .0 * 47.9 32.0 150
Triple Peak 8500 .0 .0 * 48.8 34.6 141
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Basin Index (%) * 153
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 20.7 -M *
Buck Pasture 9632 .0 -M * 29.8 -M *
EF Blacks Fork GS 9360 -M -M * 25.2 -M *
Hams Fork 7840 .0 .0 * 26.7 17.3 154
Hewinta 9500 .0 .0 * 23.8 21.6 110
Hickerson Park 9122 .3 .0 * 19.3 17.2 112
Hole-in-Rock 9168 .0 .0 * 20.2 16.6 122
Indian Creek 9425 .0 .0 * 48.5 30.5 159
Kelley R.S. 8180 .0 .0 * 37.4 25.1 149
Spirit Lk 10235 .0 -M * 26.2 -M *
Steel Creek Park 10158 -M .0 * 28.0 25.0 112
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Basin Index (%) * 133
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 23.2 -M *
Bug Lake 7987 .7 .0 * 40.5 26.5 153
Burts Miller Ranch 8000 .0 -M * 12.8 -M *
Chalk Creek #1 9171 .0 .0 * 43.5 35.1 124
Hayden Fork 9130 .0 .0 * 34.1 29.5 116
Kelley R.S. 8180 .0 .0 * 37.4 25.1 149
Lily Lake 9133 .0 .0 * 26.8 24.9 108
Monte Cristo 8932 .3 .0 * 48.5 35.3 137
Salt River Summit 7760 .0 .0 * 33.2 23.4 142
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Basin Index (%) * 132
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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.