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 TUESDAY: OCTOBER 10 , 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 .2 .0 * .8 .6 133
Black Bear 8170 1.6 .3 533* .6 1.1 55
Blind Bull Sum 8650 1.5 .0 * .3 .6 50
Cottonwood Creek 7670 .3 .0 * .1 .8 12
East Rim Divide 7930 .0 .0 * .1 .4 25
Grand Targhee 9260 4.7 1.2 392* 1.5 2.0 75
Granite Creek 6770 .0 .0 * .6 .5 120
Grassy Lake 7265 .1 .0 * .5 1.0 50
Gros Ventre Summit 8750 1.3 .0 * 1.0 .5 200
Gunsight Pass 9820 1.0 .0 * .6 .7 86
Lewis Lake Divide 7850 .0 .0 * .6 .9 67
Phillips Bench 8200 -M .0 * .8 .6 133
Salt River Summit 7760 .1 .0 * -M .5 *
Snake River Station 6920 .0 .0 * .5 .8 62
Spring Creek Divide 9000 1.0 .0 * .3 .5 60
Thumb Divide 7980 .0 .0 * .7 .7 100
Togwotee Pass 9580 3.0 .4 750* 1.7 .7 243
Two Ocean Plateau 9240 4.8 .6 800* 1.1 .9 122
Willow Creek 8380 .0 .0 * .6 1.1 55
Younts Peak 8350 .4 .2 200* .4 .7 57
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Basin Index (%) 741* 85
MADISON-GALLATIN
Black Bear 8170 1.6 .3 533* .6 1.1 55
Canyon 7870 .1 .0 * .2 .6 33
Madison Plateau 7750 .1 .0 * .6 .8 75
West Yellowstone 6700 .2 .0 * .3 .6 50
Whiskey Creek 6800 .0 .0 * .2 .7 29
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Basin Index (%) 667* 50
YELLOWSTONE
Beartooth Lake 9360 1.9 .8 238* .6 .6 100
Burnt Mtn 5880 .2 .0 * .9 1.5 60
Canyon 7870 .1 .0 * .2 .6 33
Cole Creek 7850 1.7 .8 212* .8 1.2 67
Evening Star 9200 2.7 .4 675* 1.1 1.0 110
Fisher Creek 9100 3.5 .3 1167* .9 1.0 90
Northeast Entrance 7350 .0 .0 * .2 .6 33
Parker Peak 9400 2.5 .7 357* .5 .9 56
Sylvan Lake 8420 2.6 .2 1300* .9 1.0 90
Thumb Divide 7980 .0 .0 * .7 .7 100
Two Ocean Plateau 9240 4.8 .6 800* 1.1 .9 122
White Mill 8700 3.5 .3 1167* .3 .9 33
Wolverine 7650 .0 .0 * .4 .6 67
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Basin Index (%) 573* 75
WIND RIVER
Burroughs Creek 8750 .5 -M * .2 -M *
Castle Creek 8400 .0 -M * .7 -M *
Cold Springs 9630 .7 .0 * .5 .6 83
Deer Park 9700 .5 .3 167* .4 .9 44
Hobbs Park 10100 1.7 .2 850* .8 .7 114
Kirwin 9550 2.5 .3 833* 1.1 .7 157
Little Warm 9370 1.8 .0 * .8 .6 133
Owl Creek 8975 .6 .0 * 1.1 .6 183
South Pass 9040 .2 .0 * .3 .7 43
St. Lawrence Alt 8620 .0 .0 * 1.0 .6 167
Togwotee Pass 9580 3.0 .4 750* 1.7 .7 243
Townsend Creek 8700 .4 .0 * .5 .8 62
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Basin Index (%) 950* 119
BIGHORN BASIN
Bald Mtn. 9380 2.0 1.1 182* .8 1.0 80
Bear Trap Meadow 8200 .3 .0 * 1.1 .6 183
Bone Springs Div 9350 .8 .9 89* 1.0 1.0 100
Grave Springs 8550 .2 .0 * .6 .9 67
Kirwin 9550 2.5 .3 833* 1.1 .7 157
Marquette 8760 .4 -M * 1.3 -M *
Middle Powder 7760 .4 .1 400* .7 .9 78
Owl Creek 8975 .6 .0 * 1.1 .6 183
Powder River Pass 9480 1.6 .0 * 1.2 .7 171
Shell Creek 9580 3.2 1.1 291* 1.0 .9 111
Timber Creek 7950 .6 .0 * 1.0 .8 125
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Basin Index (%) 349* 119
SHOSHONE RIVER
Blackwater 9780 3.6 .8 450* 1.2 1.0 120
Evening Star 9200 2.7 .4 675* 1.1 1.0 110
Marquette 8760 .4 -M * 1.3 -M *
Sylvan Road 7120 .0 .0 * .7 .8 88
Younts Peak 8350 .4 .2 200* .4 .7 57
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Basin Index (%) 479* 97
POWDER RIVER
Bear Trap Meadow 8200 .3 .0 * 1.1 .6 183
Cloud Peak Reservoir 9860 .8 .0 * 1.5 .9 167
Grave Springs 8550 .2 .0 * .6 .9 67
Hansen Sawmill 8360 .2 .0 * 1.0 .6 167
Middle Powder 7760 .4 .1 400* .7 .9 78
Powder River Pass 9480 1.6 .0 * 1.2 .7 171
Soldier Park 8720 .0 -M * 1.2 -M *
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Basin Index (%) 3500* 133
TONGUE RIVER
Big Goose 7990 .7 .0 * .8 .9 89
Bone Springs Div 9350 .8 .9 89* 1.0 1.0 100
Burgess Junction 7880 .4 .2 200* .5 .8 62
Dome Lake 8880 .6 .4 150* 1.2 1.0 120
Little Goose 8870 .6 -M * 1.1 -M *
Sucker Creek 8880 .5 .2 250* .2 .9 22
Tie Creek 6870 .3 .0 * .7 1.1 64
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Basin Index (%) 194* 77
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * .8 .7 114
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Basin Index (%) * 114
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 1.1 .9 122
North Rapid Creek 6130 .0 .0 * .6 .7 86
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Basin Index (%) * 106
UPPER N. PLATTE
Arapaho Ridge 10960 2.2 .2 1100* 2.7 .8 338
Blackhall Mtn 9820 2.0 -M * 2.4 -M *
Columbine 9160 .3 .0 * 1.0 .9 111
Divide Peak 8880 .9 .0 * 1.9 1.1 173
Joe Wright 10120 1.5 .0 * 3.5 1.0 350
Laprele Creek 8375 .7 .0 * .9 .7 129
Med Bow 10500 1.8 -M * 1.5 -M *
North French Creek 10130 1.0 .2 500* 1.5 1.0 150
Never Summer 10280 1.9 .3 633* 2.4 -M *
Old Battle 10000 1.9 .2 950* 1.6 1.4 114
Rawah 9020 .9 .0 * 2.2 .8 275
Sage Creek Basin 7850 .3 .0 * .5 .9 56
Sand Lake 10050 1.3 .2 650* 1.5 1.0 150
South Brush Creek 8440 .0 .0 * .8 .8 100
Tower 10500 -M .5 * 2.6 1.3 200
Webber Springs 9250 .8 .0 * -M 1.1 *
Willow Creek Pass 9540 2.1 .0 * 2.3 .5 460
Zirkel 9340 -M .0 * 2.3 1.4 164
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Basin Index (%) 1436* 186
SWEETWATER
Deer Park 9700 .5 .3 167* .4 .9 44
Larsen Creek 9000 .0 .0 * .8 -M *
South Pass 9040 .2 .0 * .3 .7 43
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Basin Index (%) 233* 44
LOWER N. PLATTE
Casper Mtn. 7900 1.0 .0 * .3 .9 33
Laprele Creek 8375 .7 .0 * .9 .7 129
Reno Hill 8400 .9 .0 * 1.1 .8 138
Windy Peak 7900 .7 .0 * .8 .6 133
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Basin Index (%) * 103
LARAMIE RIVER
Brooklyn Lake 10240 .5 .0 * 1.5 .6 250
Cinnabar Park 9574 1.1 .0 * 2.2 .8 275
Crow Creek 8330 .8 .0 * 1.6 .4 400
Deadman Hill 10220 2.6 .0 * -M .7 *
Rawah 9020 .9 .0 * 2.2 .8 275
Roach 9700 2.1 .0 * 2.8 .7 400
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Basin Index (%) * 312
S. PLATTE
Black Mountain 8920 1.3 -M * 2.4 -M *
Crow Creek 8330 .8 .0 * 1.6 .4 400
Deadman Hill 10220 2.6 .0 * -M .7 *
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Basin Index (%) * 400*
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 .0 * -M .7 *
Divide Peak 8880 .9 .0 * 1.9 1.1 173
Elk River 8700 .2 .0 * 2.2 .9 244
Little Snake River 8915 .0 .0 * 4.0 1.4 286
Old Battle 10000 1.9 .2 950* 1.6 1.4 114
Sage Creek Basin 7850 .3 .0 * .5 .9 56
Sandstone RS 8150 .2 .0 * .8 .8 100
Whiskey Park 8950 .9 .0 * 2.0 1.0 200
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Basin Index (%) 2250* 173
UPPER GREEN RIVER
Big Sandy Opening 9080 .8 .0 * .7 .5 140
Blind Bull Sum 8650 1.5 .0 * .3 .6 50
East Rim Divide 7930 .0 .0 * .1 .4 25
Elkhart Park G.S. 9400 .1 .0 * .4 .6 67
Gros Ventre Summit 8750 1.3 .0 * 1.0 .5 200
Gunsight Pass 9820 1.0 .0 * .6 .7 86
Kendall R.S. 7740 .1 .0 * .0 .4 0
Loomis Park 8240 .1 .0 * .2 .5 40
New Fork Lake 8340 .0 .0 * -M .4 *
Pocket Creek 9360 1.1 -M * .5 -M *
Snider Basin 8060 .0 .0 * -M .3 *
Spring Creek Divide 9000 1.0 .0 * .3 .5 60
Triple Peak 8500 .3 .0 * .5 .6 83
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Basin Index (%) * 77
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * .5 -M *
Buck Pasture 9632 .2 -M * .8 -M *
EF Blacks Fork GS 9360 .1 -M * .5 -M *
Hams Fork 7840 .1 .0 * .1 .3 33
Hewinta 9500 .0 .0 * .5 .7 71
Hickerson Park 9122 .5 .0 * .5 .6 83
Hole-in-Rock 9168 .3 .0 * .4 .6 67
Indian Creek 9425 .3 .0 * .2 .5 40
Kelley R.S. 8180 .1 .0 * .1 .5 20
Spirit Lk 10235 .5 -M * .9 -M *
Steel Creek Park 10158 .8 .0 * .6 .8 75
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Basin Index (%) * 60
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .4 -M *
Bug Lake 7987 .0 .0 * .2 .6 33
Burts Miller Ranch 8000 .0 -M * .3 -M *
Chalk Creek #1 9171 .0 .0 * .6 .9 67
Hayden Fork 9130 .2 .0 * .5 .8 62
Kelley R.S. 8180 .1 .0 * .1 .5 20
Lily Lake 9133 .0 .0 * .4 .8 50
Monte Cristo 8932 .0 .0 * .5 .8 62
Salt River Summit 7760 .1 .0 * -M .5 *
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Basin Index (%) * 52
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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.
