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 MONDAY: OCTOBER 9 , 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 .6 150
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 .9 1.0 90* 2.1 1.4 150
Granite Creek 6770 -M .0 * 1.0 .5 200
Grassy Lake 7265 -M .0 * 1.0 .8 125
Gros Ventre Summit 8750 .0 .0 * .8 .6 133
Gunsight Pass 9820 .1 .0 * 1.1 .8 138
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 .4 75
Snake River Station 6920 .0 .0 * .7 .6 117
Somsen Ranch 6800 -M .0 * 1.6 .5 320
Spring Creek Divide 9000 .3 .0 * 1.1 .5 220
Thumb Divide 7980 .1 .0 * .4 .6 67
Togwotee Pass 9580 .0 .0 * .5 .7 71
Triple Peak 8500 -M .0 * .9 .6 150
Two Ocean Plateau 9240 -M .6 * .9 1.0 90
Willow Creek 8080 -M .0 * -M 1.0 *
Younts Peak 8350 -M .0 * -M .6 *
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Basin Index (%) 210* 160
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .2 0* .8 .8 100
Canyon 7870 .0 -M * .6 -M *
Madison Plateau 7750 .0 .0 * .6 .6 100
West Yellowstone 6700 .0 .0 * .5 .4 125
Whiskey Creek 6800 .0 .0 * .7 .4 175
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Basin Index (%) 0* 118
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .6 0* .3 .6 50
Canyon 7870 .0 -M * .6 -M *
Evening Star 9200 .0 .4 0* 1.0 1.0 100
Fisher Creek 9100 .0 .0 * .8 .8 100
Monument Peak 8850 .0 .2 0* .8 .8 100
Northeast Entrance 7350 .0 .0 * .4 .4 100
Parker Peak 9400 .0 .5 0* .9 .8 112
Sylvan Lake 8420 .0 .0 * 1.7 1.0 170
Thumb Divide 7980 .1 .0 * .4 .6 67
Two Ocean Plateau 9240 -M .6 * .9 1.0 90
White Mill 8700 .0 .0 * .6 .6 100
Wolverine 7650 .0 .0 * .3 .5 60
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Basin Index (%) 6* 100
WIND RIVER
Burroughs Creek 8750 .0 -M * .5 -M *
Castle Creek 8400 .0 .0 * .1 .5 20
Cold Springs 9630 .0 .0 * .2 .4 50
Deer Park 9700 .0 .0 * .7 .6 117
Hobbs Park 10100 .1 .4 25* .6 .6 100
Kirwin 9550 .0 .2 0* .4 .8 50
Little Warm 9370 .0 .0 * .5 .6 83
South Pass 9040 .0 .0 * .4 .7 57
St. Lawrence Alt 8620 .0 -M * .2 -M *
Togwotee Pass 9580 .0 .0 * .5 .7 71
Townsend Creek 8700 .0 .0 * .7 .7 100
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Basin Index (%) 17* 73
BIGHORN BASIN
Bald Mtn. 9380 .6 1.1 55* 1.0 .7 143
Bear Trap Meadow 8200 .1 .0 * .8 .6 133
Bone Springs Div 9350 .0 .6 0* 1.4 .8 175
Grave Springs 8550 .0 .2 0* .6 .5 120
Kirwin 9550 .0 .2 0* .4 .8 50
Marquette 8760 .0 .2 0* .4 .7 57
Middle Powder 7760 .0 .2 0* 1.1 .6 183
Owl Creek 8975 .0 .2 0* .6 .4 150
Powder River Pass 9480 -M .2 * -M .7 *
Shell Creek 9580 .9 1.0 90* 1.5 .9 167
Timber Creek 7950 .0 .0 * .1 .8 12
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Basin Index (%) 43* 116
SHOSHONE RIVER
Blackwater 9780 .0 .6 0* .3 1.0 30
Evening Star 9200 .0 .4 0* 1.0 1.0 100
Marquette 8760 .0 .2 0* .4 .7 57
Sylvan Lake 8420 .0 .0 * 1.7 1.0 170
Sylvan Road 7120 .0 .0 * 1.0 .6 167
Younts Peak 8350 -M .0 * -M .6 *
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Basin Index (%) 0* 102
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * .8 .6 133
Cloud Peak Reservoir 9860 .0 .0 * .6 .8 75
Grave Springs 8550 .0 .2 0* .6 .5 120
Hansen Sawmill 8360 .0 .0 * .0 .8 0
Middle Powder 7760 .0 .2 0* 1.1 .6 183
Powder River Pass 9480 -M .2 * -M .7 *
Soldier Park 8720 .0 .2 0* .4 .8 50
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Basin Index (%) 17* 85
TONGUE RIVER
Big Goose 7990 .1 .0 * .5 .8 62
Bone Springs Div 9350 .0 .6 0* 1.4 .8 175
Burgess Junction 7880 .1 .3 33* 1.2 .7 171
Dome Lake 8880 .0 .4 0* .6 .9 67
Little Goose 8870 .0 .3 0* .7 1.0 70
Sucker Creek 8880 .0 .2 0* 1.0 .6 167
Tie Creek 6870 .1 .0 * .8 .7 114
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Basin Index (%) 17* 113
BELLE FOURCHE
Blind Park 6890 .0 .0 * .5 .6 83
Cole Canyon 5910 .1 .0 * .5 .4 125
North Rapid Creek 6130 .0 .0 * .6 .4 150
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Basin Index (%) * 114
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * .5 .6 83
North Rapid Creek 6130 .0 .0 * .6 .4 150
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Basin Index (%) * 110
UPPER N. PLATTE
Arapaho Ridge 10976 .1 .2 50* .2 .6 33
Blackhall Mtn 9839 .1 .0 * .5 1.0 50
Cinnabar Park 9707 .0 .0 * .4 .6 67
Columbine 9167 -M .0 * .0 .7 0
Divide Peak 8730 .0 .0 * .8 .8 100
Joe Wright 10158 .0 .0 * .3 .8 38
Laprele Creek 8390 .1 .0 * .1 .4 25
Med Bow 10512 .1 -M * .8 -M *
Never Summer 10323 .1 .4 25* .1 .7 14
North French Creek 10153 .0 .0 * .6 .6 100
Old Battle 9860 .1 .0 * .9 .8 112
Rawah 9069 .0 .0 * .3 .8 38
Sage Creek Basin 7850 .1 .0 * .5 .5 100
Sand Lake 10098 .1 .1 100* .3 .6 50
South Brush Creek 8495 -M .0 * .4 .4 100
Tower 10620 .1 .2 50* .2 .8 25
Webber Springs 9260 .1 .0 * .6 .8 75
Whiskey Park 9020 .0 .0 * .3 .9 33
Willow Creek Pass 9523 .1 .0 * .2 .4 50
Zirkel 9338 .1 .0 * .0 .7 0
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Basin Index (%) 122* 52
SWEETWATER
Deer Park 9700 .0 .0 * .7 .6 117
Larsen Creek 9000 -M .0 * .6 .7 86
South Pass 9040 .0 .0 * .4 .7 57
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Basin Index (%) * 85
LOWER N. PLATTE
Casper Mtn. 7920 .1 .0 * .9 .4 225
Laprele Creek 8390 .1 .0 * .1 .4 25
Reno Hill 8430 .0 .1 0* .3 .6 50
Windy Peak 7915 .1 .0 * .0 .4 0
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Basin Index (%) 300* 72
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 .6 0
Rawah 9069 .0 .0 * .3 .8 38
Roach 9740 .1 .0 * .3 .5 60
Windy Peak 7915 .1 .0 * .0 .4 0
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Basin Index (%) 200* 56
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 .0 .0 * .8 .8 100
Elk River 8739 .3 .0 * .2 .6 33
Elkhead Divide 8800 .0 -M * .5 -M *
Little Snake River 8928 .0 .0 * .8 1.1 73
Old Battle 9860 .1 .0 * .9 .8 112
Sage Creek Basin 7850 .1 .0 * .5 .5 100
Sandstone RS 8152 -M .0 * .4 .6 67
Whiskey Park 9020 .0 .0 * .3 .9 33
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Basin Index (%) * 69
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 .7 229
Gros Ventre Summit 8750 .0 .0 * .8 .6 133
Gunsight Pass 9820 .1 .0 * 1.1 .8 138
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 .7 86
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 * .4 .4 100
Spring Creek Divide 9000 .3 .0 * 1.1 .5 220
Triple Peak 8500 -M .0 * .9 .6 150
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Basin Index (%) * 169
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 * .4 .2 200
Henrys Fork 10182 -M -M * -M -M *
Hewinta 9500 .0 .0 * .6 .5 120
Hickerson Park 9122 .0 .0 * 1.6 .5 320
Hole-in-Rock 9168 .0 .0 * 1.1 .5 220
Indian Creek 9425 .2 .0 * 1.0 .3 333
Kelley R.S. 8180 .2 .0 * .6 .4 150
Spirit Lk 10235 .0 .0 * 2.0 .8 250
Steel Creek Park 10158 .0 .0 * .8 .6 133
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Basin Index (%) * 213
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .7 -M *
Bug Lake 7987 .3 .0 * 1.0 .5 200
Burts Miller Ranch 8000 .1 .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 .4 150
Lily Lake 9133 .0 .0 * 1.0 .4 250
Monte Cristo 8932 .0 .0 * 1.0 .6 167
Salt River Summit 7640 .0 .0 * .3 .4 75
Spring Creek Divide 9000 .3 .0 * 1.1 .5 220
Trial Lake 9992 .0 .0 * 1.2 .7 171
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Basin Index (%) * 171
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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.