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 3 , 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 * .5 .1 500
Black Bear 8170 1.4 .0 * .1 .3 33
Blind Bull Sum 8650 1.4 .0 * .2 .2 100
Cottonwood Creek 7670 .1 .0 * .0 .2 0
East Rim Divide 7930 .0 .0 * .1 .1 100
Grand Targhee 9260 4.4 .8 550* .7 .2 350
Granite Creek 6770 .2 .0 * .4 .1 400
Grassy Lake 7265 .1 .0 * .1 .4 25
Gros Ventre Summit 8750 .7 .0 * .6 .1 600
Gunsight Pass 9820 1.4 .0 * .4 .1 400
Lewis Lake Divide 7850 .0 .0 * .2 .3 67
Phillips Bench 8200 .0 .0 * .6 .2 300
Salt River Summit 7760 .2 .0 * -M .1 *
Snake River Station 6920 .0 .0 * .2 .2 100
Spring Creek Divide 9000 .9 .0 * .2 .1 200
Thumb Divide 7980 .0 .0 * .2 .2 100
Togwotee Pass 9580 3.2 .0 * 1.3 .1 1300
Two Ocean Plateau 9240 4.4 .0 * .6 .2 300
Willow Creek 8380 .2 .0 * .3 .2 150
Younts Peak 8350 .1 .0 * .1 .2 50
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Basin Index (%) 2338* 194
MADISON-GALLATIN
Black Bear 8170 1.4 .0 * .1 .3 33
Canyon 7870 .0 .0 * .0 .2 0
Madison Plateau 7750 .3 .0 * .2 .3 67
West Yellowstone 6700 .2 .0 * .0 .2 0
Whiskey Creek 6800 .0 .0 * -M .2 *
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Basin Index (%) * 30
YELLOWSTONE
Beartooth Lake 9360 1.4 .1 1400* .1 .2 50
Burnt Mtn 5880 .0 .0 * .0 .2 0
Canyon 7870 .0 .0 * .0 .2 0
Cole Creek 7850 1.2 .0 * .1 .3 33
Evening Star 9200 2.1 .0 * .0 .3 0
Fisher Creek 9100 3.2 .0 * .0 .2 0
Northeast Entrance 7350 .0 .0 * .0 .2 0
Parker Peak 9400 2.3 .1 2300* .1 .3 33
Sylvan Lake 8420 2.5 .0 * .3 .3 100
Thumb Divide 7980 .0 .0 * .2 .2 100
Two Ocean Plateau 9240 4.4 .0 * .6 .2 300
White Mill 8700 3.2 .0 * -M .2 *
Wolverine 7650 .0 .0 * -M .2 *
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Basin Index (%) 10150* 54
WIND RIVER
Burroughs Creek 8750 .7 -M * .6 -M *
Castle Creek 8400 .4 -M * .6 -M *
Cold Springs 9630 .7 .0 * .2 .2 100
Deer Park 9700 .7 .0 * .2 .1 200
Hobbs Park 10100 1.4 .0 * .3 .2 150
Kirwin 9550 2.5 .0 * .7 .1 700
Little Warm 9370 1.3 .0 * .2 .1 200
Owl Creek 8975 .5 .0 * .7 .1 700
South Pass 9040 .1 .0 * .0 .1 0
St. Lawrence Alt 8620 .4 .0 * .6 .2 300
Togwotee Pass 9580 3.2 .0 * 1.3 .1 1300
Townsend Creek 8700 .1 .0 * .1 .2 50
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Basin Index (%) * 307
BIGHORN BASIN
Bald Mtn. 9380 1.6 .0 * .2 .2 100
Bear Trap Meadow 8200 .6 .0 * .9 .1 900
Bone Springs Div 9350 .6 .1 600* .5 .2 250
Grave Springs 8550 .2 .0 * .2 .1 200
Kirwin 9550 2.5 .0 * .7 .1 700
Marquette 8760 .6 -M * .8 -M *
Middle Powder 7760 .4 .0 * .2 .2 100
Owl Creek 8975 .5 .0 * .7 .1 700
Powder River Pass 9480 1.3 .0 * 1.0 .1 1000
Shell Creek 9580 3.0 .3 1000* .6 .2 300
Timber Creek 7950 .7 .0 * .9 .2 450
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Basin Index (%) 2850* 393
SHOSHONE RIVER
Blackwater 9780 2.9 .0 * .3 .3 100
Evening Star 9200 2.1 .0 * .0 .3 0
Marquette 8760 .6 -M * .8 -M *
Sylvan Road 7120 .0 .0 * .2 .2 100
Younts Peak 8350 .1 .0 * .1 .2 50
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Basin Index (%) * 60
POWDER RIVER
Bear Trap Meadow 8200 .6 .0 * .9 .1 900
Cloud Peak Reservoir 9860 .9 .0 * 1.0 .2 500
Grave Springs 8550 .2 .0 * .2 .1 200
Hansen Sawmill 8360 .5 .0 * .7 .1 700
Middle Powder 7760 .4 .0 * .2 .2 100
Powder River Pass 9480 1.3 .0 * 1.0 .1 1000
Soldier Park 8720 .4 -M * .7 -M *
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Basin Index (%) * 500
TONGUE RIVER
Big Goose 7990 .0 .0 * .1 .1 100
Bone Springs Div 9350 .6 .1 600* .5 .2 250
Burgess Junction 7880 .1 .0 * .3 .1 300
Dome Lake 8880 .3 .0 * .3 .2 150
Little Goose 8870 .1 -M * .3 -M *
Sucker Creek 8880 .1 .0 * .1 .2 50
Tie Creek 6870 .0 .0 * .2 .2 100
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Basin Index (%) 1100* 150
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * .4 .1 400
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Basin Index (%) * 400
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * .6 .1 600
North Rapid Creek 6130 .0 .0 * .3 .1 300
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Basin Index (%) * 450
UPPER N. PLATTE
Arapaho Ridge 10960 2.3 .1 2300* 2.1 .3 700
Blackhall Mtn 9820 -M -M * 1.7 -M *
Columbine 9160 1.2 .0 * 1.0 .2 500
Divide Peak 8880 .3 .0 * .7 .2 350
Joe Wright 10120 2.3 .0 * 2.4 .2 1200
Laprele Creek 8375 .0 .0 * .0 .1 0
Med Bow 10500 -M -M * 1.0 -M *
North French Creek 10130 -M .0 * 1.1 .2 550
Never Summer 10280 2.0 .0 * -M -M *
Old Battle 10000 1.6 .0 * .8 .3 267
Rawah 9020 1.4 .0 * 1.5 .2 750
Sage Creek Basin 7850 -M .0 * .3 .2 150
Sand Lake 10050 1.0 .0 * .6 .2 300
South Brush Creek 8440 .4 .0 * .6 .2 300
Tower 10500 -M .0 * 2.1 .2 1050
Webber Springs 9250 1.2 .0 * .5 .2 250
Willow Creek Pass 9540 1.8 .0 * 1.7 .1 1700
Zirkel 9340 -M .0 * 1.2 .4 300
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Basin Index (%) 15500* 519
SWEETWATER
Deer Park 9700 .7 .0 * .2 .1 200
Larsen Creek 9000 .3 .0 * .5 -M *
South Pass 9040 .1 .0 * .0 .1 0
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Basin Index (%) * 100
LOWER N. PLATTE
Casper Mtn. 7900 .5 .0 * -M .1 *
Laprele Creek 8375 .0 .0 * .0 .1 0
Reno Hill 8400 .1 .0 * .1 .1 100
Windy Peak 7900 .1 .0 * .0 .1 0
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Basin Index (%) * 33
LARAMIE RIVER
Brooklyn Lake 10240 .6 .0 * .6 .1 600
Cinnabar Park 9574 .6 .0 * .8 .2 400
Crow Creek 8330 .4 .0 * .6 .1 600
Deadman Hill 10220 1.6 .0 * 1.6 .1 1600
Rawah 9020 1.4 .0 * 1.5 .2 750
Roach 9700 1.6 .0 * 1.6 .1 1600
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Basin Index (%) * 838
S. PLATTE
Black Mountain 8920 .8 -M * 1.1 -M *
Crow Creek 8330 .4 .0 * .6 .1 600
Deadman Hill 10220 1.6 .0 * 1.6 .1 1600
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Basin Index (%) * 1100
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 .0 * .4 .2 200
Divide Peak 8880 .3 .0 * .7 .2 350
Elk River 8700 -M .0 * 1.9 .2 950
Little Snake River 8915 1.2 .0 * 3.0 .3 1000
Old Battle 10000 1.6 .0 * .8 .3 267
Sage Creek Basin 7850 -M .0 * .3 .2 150
Sandstone RS 8150 .7 .0 * .6 .2 300
Whiskey Park 8950 -M .0 * 1.5 .2 750
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Basin Index (%) * 511
UPPER GREEN RIVER
Big Sandy Opening 9080 .6 .0 * .5 .1 500
Blind Bull Sum 8650 1.4 .0 * .2 .2 100
East Rim Divide 7930 .0 .0 * .1 .1 100
Elkhart Park G.S. 9400 .4 .0 * .5 .1 500
Gros Ventre Summit 8750 .7 .0 * .6 .1 600
Gunsight Pass 9820 1.4 .0 * .4 .1 400
Kendall R.S. 7740 .2 .0 * .0 .1 0
Loomis Park 8240 .1 .0 * .2 .1 200
New Fork Lake 8340 .1 .0 * -M .1 *
Pocket Creek 9360 .8 -M * .4 -M *
Snider Basin 8060 .0 .0 * -M .1 *
Spring Creek Divide 9000 .9 .0 * .2 .1 200
Triple Peak 8500 .0 .0 * .3 .1 300
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Basin Index (%) * 273
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * .3 -M *
Buck Pasture 9632 .2 -M * .4 -M *
EF Blacks Fork GS 9360 .0 -M * .2 -M *
Hams Fork 7840 .2 .0 * .0 .1 0
Hewinta 9500 -M .0 * .3 .1 300
Hickerson Park 9122 .6 .0 * .0 .2 0
Hole-in-Rock 9168 .0 .0 * .0 .2 0
Indian Creek 9425 .7 .0 * .0 .1 0
Kelley R.S. 8180 .1 .0 * .0 .1 0
Spirit Lk 10235 .3 -M * .2 -M *
Steel Creek Park 10158 1.2 .0 * .3 .1 300
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Basin Index (%) * 67
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .4 -M *
Bug Lake 7987 1.1 .0 * .2 .2 100
Burts Miller Ranch 8000 .0 -M * .2 -M *
Chalk Creek #1 9171 .5 .0 * .5 .2 250
Hayden Fork 9130 .2 .0 * .3 .2 150
Kelley R.S. 8180 .1 .0 * .0 .1 0
Lily Lake 9133 -M .0 * .3 .2 150
Monte Cristo 8932 .4 .0 * .2 .2 100
Salt River Summit 7760 .2 .0 * -M .1 *
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Basin Index (%) * 136
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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.
