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 WEDNESDAY: OCTOBER 3 , 2018
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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 7060 .2 .0 * .1 .1 100
Black Bear 8170 .1 .0 * .3 .3 100
Blind Bull Sum 8650 .0 .0 * .4 .2 200
Cottonwood Creek 7670 .0 .0 * .3 .2 150
East Rim Divide 7930 .0 .0 * .3 .1 300
Grand Targhee 9260 .0 .8 0* -M .2 *
Granite Creek 6770 .2 .0 * .1 .1 100
Grassy Lake 7265 .3 .0 * 1.1 .4 275
Gros Ventre Summit 8750 .1 .0 * .5 .1 500
Gunsight Pass 9820 .0 .0 * .3 .1 300
Lewis Lake Divide 7850 .0 .0 * .1 .3 33
Phillips Bench 8200 .0 .0 * .1 .2 50
Salt River Summit 7640 .0 .0 * .5 .1 500
Snake River Station 6920 .1 .0 * -M .2 *
Spring Creek Divide 9000 .1 .0 * .5 .1 500
Thumb Divide 7980 .1 .0 * .1 .2 50
Togwotee Pass 9580 .2 .0 * .2 .1 200
Two Ocean Plateau 9240 .3 .0 * .0 .2 0
Willow Creek 8080 .0 .0 * .5 .2 250
Younts Peak 8350 -M .0 * -M .2 *
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Basin Index (%) 212* 180
MADISON-GALLATIN
Black Bear 8170 .1 .0 * .3 .3 100
Canyon 7870 .0 .0 * .5 .2 250
Madison Plateau 7750 .1 .0 * .0 .3 0
West Yellowstone 6700 .2 .0 * .1 .2 50
Whiskey Creek 6800 .2 .0 * .4 .2 200
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Basin Index (%) * 108
YELLOWSTONE
Beartooth Lake 9360 .0 .1 0* .0 .2 0
Burnt Mtn 5880 .3 .0 * .6 .2 300
Canyon 7870 .0 .0 * .5 .2 250
Cole Creek 7850 .3 .0 * .3 .3 100
Evening Star 9200 .1 .0 * .2 .3 67
Fisher Creek 9100 .2 .0 * .0 .2 0
Northeast Entrance 7350 .1 .0 * -M .2 *
Parker Peak 9400 .1 .1 100* .2 .3 67
Sylvan Lake 8420 .0 .0 * .0 .3 0
Thumb Divide 7980 .1 .0 * .1 .2 50
Two Ocean Plateau 9240 .3 .0 * .0 .2 0
White Mill 8700 .1 .0 * .6 .2 300
Wolverine 7650 .1 .0 * .4 .2 200
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Basin Index (%) 850* 104
WIND RIVER
Burroughs Creek 8750 .0 -M * .4 -M *
Castle Creek 8400 .0 -M * .1 -M *
Cold Springs 9630 .0 .0 * .2 .2 100
Deer Park 9700 .0 .0 * .3 .1 300
Hobbs Park 10100 .1 .0 * .1 .2 50
Kirwin 9550 .1 .0 * .3 .1 300
Little Warm 9370 .2 .0 * .2 .1 200
Owl Creek 8975 .1 .0 * .0 .1 0
South Pass 9040 .1 .0 * .3 .1 300
St. Lawrence Alt 8620 .1 .0 * .1 .2 50
Togwotee Pass 9580 .2 .0 * .2 .1 200
Townsend Creek 8700 .1 .0 * .1 .2 50
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Basin Index (%) * 129
BIGHORN BASIN
Bald Mtn. 9380 .2 .0 * .5 .2 250
Bear Trap Meadow 8200 .1 .0 * .7 .1 700
Bone Springs Div 9350 .2 .1 200* .7 .2 350
Grave Springs 8550 .2 .0 * .0 .1 0
Kirwin 9550 .1 .0 * .3 .1 300
Marquette 8760 .0 -M * .2 -M *
Middle Powder 7760 .0 .0 * .6 .2 300
Owl Creek 8975 .1 .0 * .0 .1 0
Powder River Pass 9480 .1 .0 * 1.2 .1 1200
Shell Creek 9580 .1 .3 33* .9 .2 450
Timber Creek 7950 .0 .0 * -M .2 *
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Basin Index (%) 275* 377
SHOSHONE RIVER
Blackwater 9780 .2 .0 * .4 .3 133
Evening Star 9200 .1 .0 * .2 .3 67
Marquette 8760 .0 -M * .2 -M *
Sylvan Road 7120 .0 .0 * .2 .2 100
Younts Peak 8350 -M .0 * -M .2 *
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Basin Index (%) * 100
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * .7 .1 700
Cloud Peak Reservoir 9860 .0 .0 * .0 .2 0
Grave Springs 8550 .2 .0 * .0 .1 0
Hansen Sawmill 8360 .1 .0 * .1 .1 100
Middle Powder 7760 .0 .0 * .6 .2 300
Powder River Pass 9480 .1 .0 * 1.2 .1 1200
Soldier Park 8720 .0 -M * .0 -M *
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Basin Index (%) * 325
TONGUE RIVER
Big Goose 7990 .1 .0 * -M .1 *
Bone Springs Div 9350 .2 .1 200* .7 .2 350
Burgess Junction 7880 .1 .0 * -M .1 *
Dome Lake 8880 .0 .0 * .7 .2 350
Little Goose 8870 .0 -M * -M -M *
Sucker Creek 8880 .0 .0 * 1.1 .2 550
Tie Creek 6870 .1 .0 * .1 .2 50
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Basin Index (%) 500* 325
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * -M .1 *
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Basin Index (%) * *
CHEYENNE RIVER BASIN
Blind Park 6890 .2 .0 * .1 .1 100
North Rapid Creek 6130 .0 .0 * -M .1 *
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Basin Index (%) * 100
UPPER N. PLATTE
Arapaho Ridge 10960 .1 .1 100* .1 .3 33
Blackhall Mtn 9820 .1 -M * .1 -M *
Columbine 9160 .2 .0 * .4 .2 200
Divide Peak 8880 .1 .0 * -M .2 *
Joe Wright 10120 .1 .0 * .0 .2 0
Laprele Creek 8375 .1 .0 * .1 .1 100
Med Bow 10500 .1 -M * .0 -M *
North French Creek 10130 .1 .0 * .1 .2 50
Never Summer 10280 .2 .0 * .1 -M *
Old Battle 10000 .0 .0 * .1 .3 33
Rawah 9020 .1 .0 * .0 .2 0
Sage Creek Basin 7850 .2 .0 * .2 .2 100
Sand Lake 10050 .2 .0 * .1 .2 50
South Brush Creek 8440 .4 .0 * .2 .2 100
Tower 10500 .1 .0 * .0 .2 0
Webber Springs 9250 .2 .0 * .0 .2 0
Willow Creek Pass 9540 .0 .0 * .0 .1 0
Zirkel 9340 .1 .0 * .1 .4 25
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Basin Index (%) 2200* 47
SWEETWATER
Deer Park 9700 .0 .0 * .3 .1 300
Larsen Creek 9000 .1 .0 * .5 -M *
South Pass 9040 .1 .0 * .3 .1 300
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Basin Index (%) * 300
LOWER N. PLATTE
Casper Mtn. 7900 .0 .0 * .3 .1 300
Laprele Creek 8375 .1 .0 * .1 .1 100
Reno Hill 8400 .1 .0 * .2 .1 200
Windy Peak 7900 .0 .0 * .2 .1 200
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Basin Index (%) * 200
LARAMIE RIVER
Brooklyn Lake 10240 .2 .0 * .0 .1 0
Cinnabar Park 9574 .0 .0 * .0 .2 0
Crow Creek 8330 .0 .0 * .0 .1 0
Deadman Hill 10220 .1 .0 * .2 .1 200
Rawah 9020 .1 .0 * .0 .2 0
Roach 9700 .1 .0 * .0 .1 0
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Basin Index (%) * 25
S. PLATTE
Black Mountain 8920 .2 -M * -M -M *
Crow Creek 8330 .0 .0 * .0 .1 0
Deadman Hill 10220 .1 .0 * .2 .1 200
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Basin Index (%) * 100
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * .3 .2 150
Divide Peak 8880 .1 .0 * -M .2 *
Elk River 8700 .0 .0 * -M .2 *
Little Snake River 8915 .1 .0 * .1 .3 33
Old Battle 10000 .0 .0 * .1 .3 33
Sage Creek Basin 7850 .2 .0 * .2 .2 100
Sandstone RS 8150 .6 .0 * .0 .2 0
Whiskey Park 8950 .2 .0 * .1 .2 50
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Basin Index (%) * 57
UPPER GREEN RIVER
Big Sandy Opening 9080 .1 .0 * .5 .1 500
Blind Bull Sum 8650 .0 .0 * .4 .2 200
East Rim Divide 7930 .0 .0 * .3 .1 300
Elkhart Park G.S. 9400 .1 .0 * .1 .1 100
Gros Ventre Summit 8750 .1 .0 * .5 .1 500
Gunsight Pass 9820 .0 .0 * .3 .1 300
Kendall R.S. 7740 .1 .0 * .4 .1 400
Loomis Park 8240 -M .0 * -M .1 *
New Fork Lake 8340 .0 .0 * .3 .1 300
Pocket Creek 9360 .1 -M * .4 -M *
Snyder Basin 8060 .1 .0 * .4 .1 400
Spring Creek Divide 9000 .1 .0 * .5 .1 500
Triple Peak 8500 -M .0 * .3 .1 300
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Basin Index (%) * 333
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * .4 -M *
Buck Pasture 9632 .1 -M * .5 -M *
EF Blacks Fork GS 9360 .1 -M * .3 -M *
Hams Fork 7840 .0 .0 * .3 .1 300
Hewinta 9500 .2 .0 * .5 .1 500
Hickerson Park 9122 .4 .0 * .2 .2 100
Hole-in-Rock 9168 .0 .0 * .1 .2 50
Indian Creek 9425 .1 .0 * .4 .1 400
Kelley R.S. 8180 .5 .0 * .5 .1 500
Spirit Lk 10235 .0 -M * .5 -M *
Steel Creek Park 10158 .0 .0 * .3 .1 300
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Basin Index (%) * 256
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .3 -M *
Bug Lake 7987 .0 .0 * .3 .2 150
Burts Miller Ranch 8000 .1 -M * .3 -M *
Chalk Creek #1 9171 .1 .0 * .8 .2 400
Hayden Fork 9130 .0 .0 * .6 .2 300
Kelley R.S. 8180 .5 .0 * .5 .1 500
Lily Lake 9133 .0 .0 * .2 .2 100
Monte Cristo 8932 .4 .0 * .2 .2 100
Salt River Summit 7640 .0 .0 * .5 .1 500
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Basin Index (%) * 258
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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.
