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 FRIDAY: OCTOBER 6 , 2023
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 -M .0 * .8 .4 200
Blind Bull Sum 8650 .1 .0 * .9 .4 225
Cottonwood Creek 7670 .1 .0 * 2.1 .3 700
East Rim Divide 7930 -M .0 * .6 .1 600
Grand Targhee 9260 1.2 .6 200* 2.2 1.2 183
Granite Creek 6770 -M .0 * 1.0 .4 250
Grassy Lake 7265 -M .0 * 1.1 .6 183
Gros Ventre Summit 8750 -M .0 * .8 .4 200
Gunsight Pass 9820 .3 .0 * 1.1 .4 275
Lewis Lake Divide 7850 .1 .0 * .6 .6 100
Loomis Park 8240 .2 .0 * 1.0 .2 500
Phillips Bench 8200 .2 .0 * 1.6 .3 533
Salt River Summit 7640 .0 .0 * .0 .2 0
Snake River Station 6920 .0 .0 * .7 .4 175
Somsen Ranch 6800 -M .0 * 1.6 .4 400
Spring Creek Divide 9000 .3 .0 * 1.1 .3 367
Thumb Divide 7980 .2 .0 * .4 .4 100
Togwotee Pass 9580 .3 .0 * .4 .4 100
Triple Peak 8500 -M .0 * .9 .5 180
Two Ocean Plateau 9240 .3 .2 150* 1.0 .6 167
Willow Creek 8080 -M .0 * 2.3 .6 383
Younts Peak 8350 -M .0 * -M .2 *
----- -----
Basin Index (%) 412* 244
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 .0 * .9 .4 225
Canyon 7870 .1 -M * .6 -M *
Madison Plateau 7750 .0 .0 * .6 .5 120
West Yellowstone 6700 .0 .0 * .4 .3 133
Whiskey Creek 6800 .0 .0 * .7 .3 233
----- -----
Basin Index (%) * 173
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .0 .0 * .4 .4 100
Canyon 7870 .1 -M * .6 -M *
Evening Star 9200 .2 .0 * 1.0 .6 167
Fisher Creek 9100 .1 .0 * .8 .7 114
Monument Peak 8850 .0 .0 * .8 .6 133
Northeast Entrance 7350 .0 .0 * .4 .3 133
Parker Peak 9400 .7 .2 350* 1.0 .4 250
Sylvan Lake 8420 .0 .0 * 1.7 .8 212
Thumb Divide 7980 .2 .0 * .4 .4 100
Two Ocean Plateau 9240 .3 .2 150* 1.0 .6 167
White Mill 8700 .0 .0 * .7 .4 175
Wolverine 7650 .0 .0 * .4 .3 133
----- -----
Basin Index (%) 375* 156
WIND RIVER
Burroughs Creek 8750 .1 -M * .6 -M *
Castle Creek 8400 .0 .0 * .2 .2 100
Cold Springs 9630 .1 .0 * .2 .2 100
Deer Park 9700 .0 .0 * .7 .5 140
Hobbs Park 10100 .1 .0 * .5 .2 250
Kirwin 9550 .0 .0 * .4 .4 100
Little Warm 9370 .0 .0 * .6 .3 200
South Pass 9040 .0 .0 * .4 .3 133
St. Lawrence Alt 8620 .0 -M * .2 -M *
Togwotee Pass 9580 .3 .0 * .4 .4 100
Townsend Creek 8700 .0 .0 * .8 .3 267
----- -----
Basin Index (%) * 150
BIGHORN BASIN
Bald Mtn. 9380 .4 .3 133* .9 .5 180
Bear Trap Meadow 8200 .0 .0 * .7 .4 175
Bone Springs Div 9350 .5 .2 250* 1.3 .4 325
Grave Springs 8550 .1 .0 * .6 .2 300
Kirwin 9550 .0 .0 * .4 .4 100
Marquette 8760 .0 .0 * .4 .3 133
Middle Powder 7760 .0 .0 * 1.1 .4 275
Owl Creek 8975 .0 .0 * .6 .2 300
Powder River Pass 9480 -M .1 * -M .4 *
Shell Creek 9580 .8 .6 133* 1.4 .4 350
Timber Creek 7950 .0 .0 * .1 .4 25
----- -----
Basin Index (%) 164* 208
SHOSHONE RIVER
Blackwater 9780 .1 .0 * .2 .5 40
Evening Star 9200 .2 .0 * 1.0 .6 167
Marquette 8760 .0 .0 * .4 .3 133
Sylvan Lake 8420 .0 .0 * 1.7 .8 212
Sylvan Road 7120 .0 .0 * 1.1 .4 275
Younts Peak 8350 -M .0 * -M .2 *
----- -----
Basin Index (%) * 169
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * .7 .4 175
Cloud Peak Reservoir 9860 .0 .0 * .6 .6 100
Grave Springs 8550 .1 .0 * .6 .2 300
Hansen Sawmill 8360 .0 .0 * .1 .4 25
Middle Powder 7760 .0 .0 * 1.1 .4 275
Powder River Pass 9480 -M .1 * -M .4 *
Soldier Park 8720 .0 .0 * .5 .6 83
----- -----
Basin Index (%) * 138
TONGUE RIVER
Big Goose 7990 .1 .0 * .6 .5 120
Bone Springs Div 9350 .5 .2 250* 1.3 .4 325
Burgess Junction 7880 .0 .1 0* 1.2 .4 300
Dome Lake 8880 .0 .0 * .6 .4 150
Little Goose 8870 .1 .0 * .7 .4 175
Sucker Creek 8880 .1 .0 * .9 .3 300
Tie Creek 6870 .1 .0 * .7 .4 175
----- -----
Basin Index (%) 300* 214
BELLE FOURCHE
Blind Park 6890 .1 .0 * .6 .3 200
Cole Canyon 5910 .0 .0 * .4 .2 200
North Rapid Creek 6130 .0 .0 * .6 .2 300
----- -----
Basin Index (%) * 229
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * .6 .3 200
North Rapid Creek 6130 .0 .0 * .6 .2 300
----- -----
Basin Index (%) * 240
UPPER N. PLATTE
Arapaho Ridge 10976 .1 .2 50* .2 .5 40
Blackhall Mtn 9839 .2 .0 * .5 .4 125
Cinnabar Park 9707 .0 .0 * .4 .3 133
Columbine 9167 -M .0 * .0 .4 0
Divide Peak 8730 .0 .0 * .8 .2 400
Joe Wright 10158 .0 .0 * .3 .3 100
Laprele Creek 8390 .1 .0 * .1 .2 50
Med Bow 10512 .3 -M * .7 -M *
Never Summer 10323 .1 .0 * .2 .4 50
North French Creek 10153 .0 .0 * .5 .2 250
Old Battle 9860 .3 .0 * .8 .3 267
Rawah 9069 .0 .0 * .3 .4 75
Sage Creek Basin 7850 .1 .0 * .6 .2 300
Sand Lake 10098 .3 .0 * .3 .2 150
South Brush Creek 8495 .0 .0 * .3 .2 150
Tower 10620 .1 .0 * .2 .5 40
Webber Springs 9260 .1 .0 * .5 .3 167
Whiskey Park 9020 .0 .0 * .3 .3 100
Willow Creek Pass 9523 .1 .0 * .2 .2 100
Zirkel 9338 .1 .0 * .0 .6 0
----- -----
Basin Index (%) 800* 107
SWEETWATER
Deer Park 9700 .0 .0 * .7 .5 140
Larsen Creek 9000 -M .0 * .6 .5 120
South Pass 9040 .0 .0 * .4 .3 133
----- -----
Basin Index (%) * 131
LOWER N. PLATTE
Casper Mtn. 7920 .1 .0 * .8 .1 800
Laprele Creek 8390 .1 .0 * .1 .2 50
Reno Hill 8430 -M .0 * .2 .2 100
Windy Peak 7915 .2 .0 * .0 .2 0
----- -----
Basin Index (%) * 157
LARAMIE RIVER
Brooklyn Lake 10250 .1 .0 * .3 .1 300
Cinnabar Park 9707 .0 .0 * .4 .3 133
Crow Creek 8335 .0 .0 * .7 .2 350
Deadman Hill 10239 .2 .0 * .0 .3 0
Rawah 9069 .0 .0 * .3 .4 75
Roach 9740 .1 .0 * .3 .2 150
Windy Peak 7915 .2 .0 * .0 .2 0
----- -----
Basin Index (%) * 118
S. PLATTE
Crow Creek 8335 .0 .0 * .7 .2 350
----- -----
Basin Index (%) * 350
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * .2 .2 100
Divide Peak 8730 .0 .0 * .8 .2 400
Elk River 8739 .4 .0 * .2 .2 100
Elkhead Divide 8800 .0 -M * .4 -M *
Little Snake River 8928 .1 .0 * .8 .6 133
Old Battle 9860 .3 .0 * .8 .3 267
Sage Creek Basin 7850 .1 .0 * .6 .2 300
Sandstone RS 8152 .0 .0 * .4 .2 200
Whiskey Park 9020 .0 .0 * .3 .3 100
----- -----
Basin Index (%) * 186
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .0 * .9 .3 300
Blind Bull Sum 8650 .1 .0 * .9 .4 225
East Rim Divide 7930 -M .0 * .6 .1 600
Elkhart Park G.S. 9400 .0 .0 * 1.6 .4 400
Gros Ventre Summit 8750 -M .0 * .8 .4 200
Gunsight Pass 9820 .3 .0 * 1.1 .4 275
Indian Creek 9425 .2 .0 * 1.0 .2 500
Kendall R.S. 7740 .0 .0 * 1.1 .2 550
Larsen Creek 9000 -M .0 * .6 .5 120
Loomis Park 8240 .2 .0 * 1.0 .2 500
New Fork Lake 8340 -M .0 * .0 .1 0
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * .4 .2 200
Spring Creek Divide 9000 .3 .0 * 1.1 .3 367
Triple Peak 8500 -M .0 * .9 .5 180
----- -----
Basin Index (%) * 286
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * .6 -M *
Buck Pasture 9632 .0 -M * .9 -M *
EF Blacks Fork GS 9360 .0 -M * .7 -M *
Hams Fork 7840 -M .0 * .3 .1 300
Henrys Fork 10182 -M -M * 1.4 -M *
Hewinta 9500 .1 .0 * .6 .3 200
Hickerson Park 9122 .0 .0 * 1.5 .2 750
Hole-in-Rock 9168 .0 .0 * 1.1 .2 550
Indian Creek 9425 .2 .0 * 1.0 .2 500
Kelley R.S. 8180 .2 .0 * .6 .2 300
Spirit Lk 10235 .4 .0 * 2.0 .5 400
Steel Creek Park 10158 .0 .0 * .8 .4 200
----- -----
Basin Index (%) * 376
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .7 -M *
Bug Lake 7987 .3 .0 * .9 .2 450
Burts Miller Ranch 8000 .1 .0 * .5 .2 250
Chalk Creek #1 9171 .1 .0 * 1.2 .4 300
Giveout 6930 -M .0 * .6 .2 300
Hayden Fork 9130 .0 .0 * 1.1 .3 367
Kelley R.S. 8180 .2 .0 * .6 .2 300
Lily Lake 9133 .0 .0 * 1.0 .2 500
Monte Cristo 8932 .0 .0 * 1.0 .4 250
Salt River Summit 7640 .0 .0 * .0 .2 0
Spring Creek Divide 9000 .3 .0 * 1.1 .3 367
Trial Lake 9992 1.0 .0 * 1.2 .3 400
----- -----
Basin Index (%) * 317
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.