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 4 , 2023
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
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WYOMING
SNAKE RIVER
Base Camp 7060 -M .0 * .9 .1 900
Blind Bull Sum 8650 .6 .0 * .9 .1 900
Cottonwood Creek 7670 .2 .0 * 2.0 .1 2000
East Rim Divide 7930 -M .0 * .3 .0 *
Grand Targhee 9260 1.5 .2 750* 2.0 .4 500
Granite Creek 6770 .0 .0 * .8 .1 800
Grassy Lake 7265 -M .0 * 1.0 .1 1000
Gros Ventre Summit 8750 -M .0 * .8 .1 800
Gunsight Pass 9820 .8 .0 * 1.1 .2 550
Lewis Lake Divide 7850 .1 .0 * .5 .1 500
Loomis Park 8240 .2 .0 * 1.0 .1 1000
Phillips Bench 8200 .7 .0 * 1.5 .1 1500
Salt River Summit 7640 .0 .0 * -M .0 *
Snake River Station 6920 .0 .0 * .6 .1 600
Somsen Ranch 6800 -M .0 * 1.5 .1 1500
Spring Creek Divide 9000 .6 .0 * 1.1 .2 550
Thumb Divide 7980 .2 .0 * .3 .1 300
Togwotee Pass 9580 .6 .0 * .3 .2 150
Triple Peak 8500 -M .0 * .9 .2 450
Two Ocean Plateau 9240 .7 .0 * .8 .3 267
Willow Creek 8080 .4 .0 * 2.2 .2 1100
Younts Peak 8350 -M .0 * -M .1 *
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Basin Index (%) 3300* 707
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .2 .0 * .8 .2 400
Canyon 7870 .1 -M * .5 -M *
Madison Plateau 7750 .0 .0 * .6 .1 600
West Yellowstone 6700 .1 .0 * .4 .0 *
Whiskey Creek 6800 .1 .0 * .7 .2 350
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Basin Index (%) * 500
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * .2 .2 100
Canyon 7870 .1 -M * .5 -M *
Evening Star 9200 .5 .0 * .8 .1 800
Fisher Creek 9100 .1 .0 * .5 .2 250
Monument Peak 8850 .1 .0 * .7 .2 350
Northeast Entrance 7350 .1 .0 * .3 .1 300
Parker Peak 9400 .6 .0 * .8 .2 400
Sylvan Lake 8420 .7 .0 * 1.6 .1 1600
Thumb Divide 7980 .2 .0 * .3 .1 300
Two Ocean Plateau 9240 .7 .0 * .8 .3 267
White Mill 8700 .0 .0 * .5 .2 250
Wolverine 7650 .0 .0 * .3 .2 150
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Basin Index (%) * 358
WIND RIVER
Burroughs Creek 8750 .0 -M * .6 -M *
Castle Creek 8400 .0 .0 * .1 .2 50
Cold Springs 9630 .0 .0 * .2 .1 200
Deer Park 9700 .0 .0 * .7 .1 700
Hobbs Park 10100 .2 .0 * .5 .1 500
Kirwin 9550 .0 .0 * .3 .2 150
Little Warm 9370 .0 .0 * .5 .2 250
South Pass 9040 .1 .0 * .4 .1 400
St. Lawrence Alt 8620 .0 -M * .2 -M *
Togwotee Pass 9580 .6 .0 * .3 .2 150
Townsend Creek 8700 .2 .0 * .8 .1 800
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Basin Index (%) * 292
BIGHORN BASIN
Bald Mtn. 9380 .4 .0 * .7 .2 350
Bear Trap Meadow 8200 .0 .0 * .5 .1 500
Bone Springs Div 9350 .3 .0 * 1.0 .2 500
Grave Springs 8550 .3 .0 * .5 .1 500
Kirwin 9550 .0 .0 * .3 .2 150
Marquette 8760 .0 .0 * .4 .2 200
Middle Powder 7760 .4 .0 * .9 .2 450
Owl Creek 8975 .0 .0 * .6 .1 600
Powder River Pass 9480 -M .0 * -M .2 *
Shell Creek 9580 .7 .4 175* 1.2 .2 600
Timber Creek 7950 .0 .0 * .0 .1 0
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Basin Index (%) 525* 381
SHOSHONE RIVER
Blackwater 9780 .3 .0 * -M .2 *
Evening Star 9200 .5 .0 * .8 .1 800
Marquette 8760 .0 .0 * .4 .2 200
Sylvan Lake 8420 .7 .0 * 1.6 .1 1600
Sylvan Road 7120 -M .0 * 1.0 .1 1000
Younts Peak 8350 -M .0 * -M .1 *
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Basin Index (%) * 760
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * .5 .1 500
Cloud Peak Reservoir 9860 .0 .0 * .4 .3 133
Grave Springs 8550 .3 .0 * .5 .1 500
Hansen Sawmill 8360 .0 .0 * .0 .1 0
Middle Powder 7760 .4 .0 * .9 .2 450
Powder River Pass 9480 -M .0 * -M .2 *
Soldier Park 8720 .0 .0 * .4 .3 133
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Basin Index (%) * 245
TONGUE RIVER
Big Goose 7990 .0 .0 * .5 .1 500
Bone Springs Div 9350 .3 .0 * 1.0 .2 500
Burgess Junction 7880 .1 .0 * .8 .2 400
Dome Lake 8880 .0 .0 * .3 .2 150
Little Goose 8870 .1 .0 * .4 .2 200
Sucker Creek 8880 .1 .0 * .5 .1 500
Tie Creek 6870 .1 .0 * .4 .1 400
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Basin Index (%) * 355
BELLE FOURCHE
Blind Park 6890 .2 .0 * .5 .1 500
Cole Canyon 5910 .0 .0 * .4 .1 400
North Rapid Creek 6130 -M .0 * .5 .1 500
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Basin Index (%) * 467
CHEYENNE RIVER BASIN
Blind Park 6890 .2 .0 * .5 .1 500
North Rapid Creek 6130 -M .0 * .5 .1 500
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Basin Index (%) * 500
UPPER N. PLATTE
Arapaho Ridge 10976 .1 .0 * .2 .2 100
Blackhall Mtn 9839 .5 .0 * .5 .3 167
Cinnabar Park 9707 .3 .0 * .4 .1 400
Columbine 9167 -M .0 * .0 .2 0
Divide Peak 8730 .3 .0 * .7 .0 *
Joe Wright 10158 .0 .0 * .4 .2 200
Laprele Creek 8390 .1 .0 * .1 .1 100
Med Bow 10512 .6 -M * .7 -M *
Never Summer 10323 .1 .0 * .1 .2 50
North French Creek 10153 .4 .0 * .4 .1 400
Old Battle 9860 .4 .0 * .7 .0 *
Rawah 9069 .0 .0 * .3 .1 300
Sage Creek Basin 7850 .1 .0 * .6 .2 300
Sand Lake 10098 .3 .0 * .2 .1 200
South Brush Creek 8495 -M .0 * .2 .1 200
Tower 10620 .3 .0 * .1 .2 50
Webber Springs 9260 .3 .0 * .5 .1 500
Whiskey Park 9020 .2 .0 * .3 .2 150
Willow Creek Pass 9523 .1 .0 * .2 .1 200
Zirkel 9338 .1 .0 * .0 .3 0
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Basin Index (%) * 211
SWEETWATER
Deer Park 9700 .0 .0 * .7 .1 700
Larsen Creek 9000 -M .0 * .7 .4 175
South Pass 9040 .1 .0 * .4 .1 400
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Basin Index (%) * 300
LOWER N. PLATTE
Casper Mtn. 7920 .0 .0 * .8 .0 *
Laprele Creek 8390 .1 .0 * .1 .1 100
Reno Hill 8430 -M .0 * .2 .0 *
Windy Peak 7915 .2 .0 * .0 .0 *
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Basin Index (%) * 1100
LARAMIE RIVER
Brooklyn Lake 10250 .3 .0 * .2 .0 *
Cinnabar Park 9707 .3 .0 * .4 .1 400
Crow Creek 8335 .0 .0 * .7 .0 *
Deadman Hill 10239 .2 .0 * .0 .1 0
Rawah 9069 .0 .0 * .3 .1 300
Roach 9740 .2 .0 * .3 .1 300
Windy Peak 7915 .2 .0 * .0 .0 *
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Basin Index (%) * 475
S. PLATTE
Crow Creek 8335 .0 .0 * .7 .0 *
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Basin Index (%) * *
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * .2 .1 200
Divide Peak 8730 .3 .0 * .7 .0 *
Elk River 8739 .4 .0 * .2 .1 200
Elkhead Divide 8800 .0 -M * .4 -M *
Little Snake River 8928 .2 .0 * .9 .2 450
Old Battle 9860 .4 .0 * .7 .0 *
Sage Creek Basin 7850 .1 .0 * .6 .2 300
Sandstone RS 8152 .1 .0 * .4 .1 400
Whiskey Park 9020 .2 .0 * .3 .2 150
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Basin Index (%) * 444
UPPER GREEN RIVER
Big Sandy Opening 9080 .1 .0 * .9 .1 900
Blind Bull Sum 8650 .6 .0 * .9 .1 900
East Rim Divide 7930 -M .0 * .3 .0 *
Elkhart Park G.S. 9400 .6 .0 * 1.6 .1 1600
Gros Ventre Summit 8750 -M .0 * .8 .1 800
Gunsight Pass 9820 .8 .0 * 1.1 .2 550
Indian Creek 9425 .8 .0 * .9 .1 900
Kendall R.S. 7740 .1 .0 * 1.1 .0 *
Larsen Creek 9000 -M .0 * .7 .4 175
Loomis Park 8240 .2 .0 * 1.0 .1 1000
New Fork Lake 8340 -M .0 * -M .0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * .5 .0 *
Spring Creek Divide 9000 .6 .0 * 1.1 .2 550
Triple Peak 8500 -M .0 * .9 .2 450
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Basin Index (%) * 738
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * .6 -M *
Buck Pasture 9632 .1 -M * .9 -M *
EF Blacks Fork GS 9360 .0 -M * .7 -M *
Hams Fork 7840 -M .0 * .3 .0 *
Henrys Fork 10182 -M -M * 1.4 -M *
Hewinta 9500 .2 .0 * .6 .2 300
Hickerson Park 9122 .0 .0 * 1.5 .2 750
Hole-in-Rock 9168 .0 .0 * 1.1 .1 1100
Indian Creek 9425 .8 .0 * .9 .1 900
Kelley R.S. 8180 .3 .0 * .6 .1 600
Spirit Lk 10235 .9 .0 * 1.9 .1 1900
Steel Creek Park 10158 .0 .0 * .8 .2 400
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Basin Index (%) * 770
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .7 -M *
Bug Lake 7987 .4 .0 * .9 .1 900
Burts Miller Ranch 8000 .2 .0 * .5 .0 *
Chalk Creek #1 9171 .5 .0 * 1.1 .2 550
Giveout 6930 -M .0 * .6 .0 *
Hayden Fork 9130 .1 .0 * 1.2 .2 600
Kelley R.S. 8180 .3 .0 * .6 .1 600
Lily Lake 9133 .2 .0 * 1.0 .2 500
Monte Cristo 8932 .1 .0 * 1.1 .2 550
Salt River Summit 7640 .0 .0 * -M .0 *
Spring Creek Divide 9000 .6 .0 * 1.1 .2 550
Trial Lake 9992 1.2 .0 * 1.1 .2 550
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Basin Index (%) * 657
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Median (or Average) 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 (or Average) represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median (or Average) value for those sites on this day.
The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Median (or Average) value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1991-2020.
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 or average for the day is less than 10% of the maximum
median or average value for the year.
* Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians or averages 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.
