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: OCTOBER 8 , 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 .5 180
Blind Bull Sum 8650 .1 .0 * .9 .6 150
Cottonwood Creek 7670 .1 .0 * 2.1 .6 350
East Rim Divide 7930 -M .0 * .7 .3 233
Grand Targhee 9260 1.0 1.0 100* 2.2 1.4 157
Granite Creek 6770 .0 .0 * 1.0 .4 250
Grassy Lake 7265 -M .0 * 1.0 .8 125
Gros Ventre Summit 8750 .0 .0 * .8 .6 133
Gunsight Pass 9820 .2 .0 * 1.1 .7 157
Lewis Lake Divide 7850 .1 .0 * .5 .6 83
Loomis Park 8240 .2 .0 * 1.0 .4 250
Phillips Bench 8200 .2 .0 * 1.6 .5 320
Salt River Summit 7640 .0 .0 * .3 .3 100
Snake River Station 6920 .0 .0 * .7 .6 117
Somsen Ranch 6800 -M .0 * 1.6 .4 400
Spring Creek Divide 9000 .3 .0 * 1.1 .4 275
Thumb Divide 7980 .1 .0 * .4 .6 67
Togwotee Pass 9580 .1 .0 * .5 .6 83
Triple Peak 8500 -M .0 * .9 .5 180
Two Ocean Plateau 9240 -M .4 * 1.0 .8 125
Willow Creek 8080 -M .0 * 2.3 1.0 230
Younts Peak 8350 -M .0 * -M .6 *
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Basin Index (%) 240* 179
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .2 0* .8 .6 133
Canyon 7870 .0 -M * .6 -M *
Madison Plateau 7750 .0 .0 * .7 .5 140
West Yellowstone 6700 .0 .0 * .5 .4 125
Whiskey Creek 6800 .0 .0 * .7 .4 175
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Basin Index (%) 0* 142
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .5 0* .4 .6 67
Canyon 7870 .0 -M * .6 -M *
Evening Star 9200 .1 .2 50* 1.0 .8 125
Fisher Creek 9100 .0 .0 * .8 .8 100
Monument Peak 8850 .0 .1 0* .8 .7 114
Northeast Entrance 7350 .0 .0 * .4 .4 100
Parker Peak 9400 .0 .4 0* 1.0 .7 143
Sylvan Lake 8420 .0 .0 * 1.7 .9 189
Thumb Divide 7980 .1 .0 * .4 .6 67
Two Ocean Plateau 9240 -M .4 * 1.0 .8 125
White Mill 8700 .0 .0 * .6 .6 100
Wolverine 7650 .0 .0 * .4 .5 80
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Basin Index (%) 17* 115
WIND RIVER
Burroughs Creek 8750 .0 -M * .6 -M *
Castle Creek 8400 .0 .0 * .1 .5 20
Cold Springs 9630 .1 .0 * .2 .3 67
Deer Park 9700 .0 .0 * .7 .6 117
Hobbs Park 10100 .1 .3 33* .6 .6 100
Kirwin 9550 .0 .2 0* .4 .7 57
Little Warm 9370 .0 .0 * .5 .5 100
South Pass 9040 .0 .0 * .4 .6 67
St. Lawrence Alt 8620 .0 -M * .2 -M *
Togwotee Pass 9580 .1 .0 * .5 .6 83
Townsend Creek 8700 .0 .0 * .8 .6 133
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Basin Index (%) 60* 84
BIGHORN BASIN
Bald Mtn. 9380 .5 .8 62* .9 .6 150
Bear Trap Meadow 8200 .1 .0 * .8 .6 133
Bone Springs Div 9350 .3 .5 60* 1.4 .7 200
Grave Springs 8550 .0 .2 0* .5 .5 100
Kirwin 9550 .0 .2 0* .4 .7 57
Marquette 8760 .0 .2 0* .4 .6 67
Middle Powder 7760 .1 .1 100* 1.1 .6 183
Owl Creek 8975 .0 .0 * .6 .4 150
Powder River Pass 9480 -M .2 * -M .6 *
Shell Creek 9580 .9 1.0 90* 1.5 .8 188
Timber Creek 7950 .0 .2 0* .1 .7 14
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Basin Index (%) 59* 124
SHOSHONE RIVER
Blackwater 9780 .0 .4 0* .3 .8 38
Evening Star 9200 .1 .2 50* 1.0 .8 125
Marquette 8760 .0 .2 0* .4 .6 67
Sylvan Lake 8420 .0 .0 * 1.7 .9 189
Sylvan Road 7120 .0 .0 * 1.0 .4 250
Younts Peak 8350 -M .0 * -M .6 *
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Basin Index (%) 12* 126
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * .8 .6 133
Cloud Peak Reservoir 9860 .0 .1 0* .6 .8 75
Grave Springs 8550 .0 .2 0* .5 .5 100
Hansen Sawmill 8360 .0 .0 * .0 .6 0
Middle Powder 7760 .1 .1 100* 1.1 .6 183
Powder River Pass 9480 -M .2 * -M .6 *
Soldier Park 8720 .0 .1 0* .4 .7 57
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Basin Index (%) 40* 89
TONGUE RIVER
Big Goose 7990 .1 .1 100* .6 .6 100
Bone Springs Div 9350 .3 .5 60* 1.4 .7 200
Burgess Junction 7880 .0 .2 0* 1.2 .6 200
Dome Lake 8880 .0 .2 0* .6 .8 75
Little Goose 8870 .0 .4 0* .6 .6 100
Sucker Creek 8880 .0 .2 0* .9 .5 180
Tie Creek 6870 .1 .0 * .8 .6 133
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Basin Index (%) 31* 139
BELLE FOURCHE
Blind Park 6890 .1 .0 * .6 .5 120
Cole Canyon 5910 .0 .0 * .5 .4 125
North Rapid Creek 6130 .0 .0 * .6 .3 200
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Basin Index (%) * 142
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * .6 .5 120
North Rapid Creek 6130 .0 .0 * .6 .3 200
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Basin Index (%) * 150
UPPER N. PLATTE
Arapaho Ridge 10976 .1 .2 50* .2 .6 33
Blackhall Mtn 9839 .1 .0 * .5 .7 71
Cinnabar Park 9707 .0 .0 * .4 .6 67
Columbine 9167 -M .0 * .0 .5 0
Divide Peak 8730 .1 .0 * .8 .6 133
Joe Wright 10158 .0 .0 * .4 .6 67
Laprele Creek 8390 .1 .0 * .1 .2 50
Med Bow 10512 .0 -M * .8 -M *
Never Summer 10323 .1 .1 100* .1 .6 17
North French Creek 10153 -M .0 * .6 .4 150
Old Battle 9860 .1 .0 * .9 .6 150
Rawah 9069 -M .0 * .3 .7 43
Sage Creek Basin 7850 .1 .0 * .5 .5 100
Sand Lake 10098 .1 .0 * .2 .5 40
South Brush Creek 8495 -M .0 * .4 .4 100
Tower 10620 .1 .1 100* .2 .8 25
Webber Springs 9260 .1 .0 * .5 .6 83
Whiskey Park 9020 .0 .0 * .3 .8 38
Willow Creek Pass 9523 .1 .0 * .2 .4 50
Zirkel 9338 .1 .0 * .0 .6 0
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Basin Index (%) 300* 62
SWEETWATER
Deer Park 9700 .0 .0 * .7 .6 117
Larsen Creek 9000 -M .0 * .6 .6 100
South Pass 9040 .0 .0 * .4 .6 67
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Basin Index (%) * 94
LOWER N. PLATTE
Casper Mtn. 7920 .1 .0 * .9 .3 300
Laprele Creek 8390 .1 .0 * .1 .2 50
Reno Hill 8430 .0 .0 * .3 .5 60
Windy Peak 7915 .2 .0 * .0 .3 0
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Basin Index (%) * 100
LARAMIE RIVER
Brooklyn Lake 10250 .0 .0 * .3 .4 75
Cinnabar Park 9707 .0 .0 * .4 .6 67
Crow Creek 8335 .0 .0 * .7 .3 233
Deadman Hill 10239 .2 .2 100* .0 .4 0
Rawah 9069 -M .0 * .3 .7 43
Roach 9740 .1 .0 * .3 .4 75
Windy Peak 7915 .2 .0 * .0 .3 0
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Basin Index (%) 250* 65
S. PLATTE
Crow Creek 8335 .0 .0 * .7 .3 233
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Basin Index (%) * 233
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * .2 .6 33
Divide Peak 8730 .1 .0 * .8 .6 133
Elk River 8739 .3 .0 * .2 .6 33
Elkhead Divide 8800 .0 -M * .5 -M *
Little Snake River 8928 .0 .0 * .8 .8 100
Old Battle 9860 .1 .0 * .9 .6 150
Sage Creek Basin 7850 .1 .0 * .5 .5 100
Sandstone RS 8152 .0 .0 * .4 .4 100
Whiskey Park 9020 .0 .0 * .3 .8 38
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Basin Index (%) * 84
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * 1.0 .6 167
Blind Bull Sum 8650 .1 .0 * .9 .6 150
East Rim Divide 7930 -M .0 * .7 .3 233
Elkhart Park G.S. 9400 .0 .0 * 1.6 .6 267
Gros Ventre Summit 8750 .0 .0 * .8 .6 133
Gunsight Pass 9820 .2 .0 * 1.1 .7 157
Indian Creek 9425 .2 .0 * 1.0 .3 333
Kendall R.S. 7740 .0 .0 * 1.1 .4 275
Larsen Creek 9000 -M .0 * .6 .6 100
Loomis Park 8240 .2 .0 * 1.0 .4 250
New Fork Lake 8340 -M .0 * .0 .3 0
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * .5 .4 125
Spring Creek Divide 9000 .3 .0 * 1.1 .4 275
Triple Peak 8500 -M .0 * .9 .5 180
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Basin Index (%) * 184
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * .6 -M *
Buck Pasture 9632 .0 -M * 1.0 -M *
EF Blacks Fork GS 9360 .0 -M * .7 -M *
Hams Fork 7840 -M .0 * .3 .2 150
Henrys Fork 10182 -M -M * 1.4 -M *
Hewinta 9500 .1 .0 * .6 .5 120
Hickerson Park 9122 .0 .0 * 1.6 .4 400
Hole-in-Rock 9168 .0 .0 * 1.1 .4 275
Indian Creek 9425 .2 .0 * 1.0 .3 333
Kelley R.S. 8180 .2 .0 * .6 .2 300
Spirit Lk 10235 .0 .0 * 2.0 .6 333
Steel Creek Park 10158 .0 .0 * .8 .6 133
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Basin Index (%) * 250
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .7 -M *
Bug Lake 7987 .3 .0 * 1.0 .4 250
Burts Miller Ranch 8000 .2 .0 * .5 .3 167
Chalk Creek #1 9171 .1 .0 * 1.2 .8 150
Giveout 6930 -M .0 * .6 .4 150
Hayden Fork 9130 .0 .0 * 1.1 .6 183
Kelley R.S. 8180 .2 .0 * .6 .2 300
Lily Lake 9133 .0 .0 * 1.0 .4 250
Monte Cristo 8932 .0 .0 * 1.0 .5 200
Salt River Summit 7640 .0 .0 * .3 .3 100
Spring Creek Divide 9000 .3 .0 * 1.1 .4 275
Trial Lake 9992 .0 .0 * 1.2 .7 171
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Basin Index (%) * 192
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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.
