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 THURSDAY: OCTOBER 12 , 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 * 1.2 .8 150
Blind Bull Sum 8650 .0 .2 0* 1.0 .7 143
Cottonwood Creek 7670 .1 .0 * 2.4 1.0 240
East Rim Divide 7930 -M .0 * .7 .4 175
Grand Targhee 9260 .8 1.5 53* 2.8 1.9 147
Granite Creek 6770 .0 .0 * 1.1 .5 220
Grassy Lake 7265 -M .0 * 1.9 1.1 173
Gros Ventre Summit 8750 .2 .0 * 1.2 .8 150
Gunsight Pass 9820 .9 .1 900* 2.0 .8 250
Lewis Lake Divide 7850 .3 .0 * 1.0 .9 111
Loomis Park 8240 .2 .0 * 1.2 .6 200
Phillips Bench 8200 .2 .0 * 1.8 .8 225
Salt River Summit 7640 .0 .0 * .4 .6 67
Snake River Station 6920 .2 .0 * 1.2 .8 150
Somsen Ranch 6800 -M .0 * 1.6 .6 267
Spring Creek Divide 9000 .0 .2 0* 1.3 .6 217
Thumb Divide 7980 .3 .0 * .7 .8 88
Togwotee Pass 9580 .7 .6 117* 1.0 1.1 91
Triple Peak 8500 -M .0 * 1.0 .7 143
Two Ocean Plateau 9240 .8 .9 89* 1.9 1.2 158
Willow Creek 8080 -M .0 * 2.6 1.4 186
Younts Peak 8350 -M .1 * -M .6 *
----- -----
Basin Index (%) 134* 166
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .6 .8 75* 1.9 1.1 173
Canyon 7870 .2 -M * .8 -M *
Madison Plateau 7750 .2 .0 * 1.0 1.0 100
West Yellowstone 6700 .1 .0 * .8 .6 133
Whiskey Creek 6800 .1 .0 * 1.2 .6 200
----- -----
Basin Index (%) 125* 148
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .6 .8 75* 1.1 .8 138
Canyon 7870 .2 -M * .8 -M *
Evening Star 9200 .9 .6 150* 2.2 1.4 157
Fisher Creek 9100 .2 .7 29* 1.2 1.2 100
Monument Peak 8850 .5 .4 125* 1.6 1.0 160
Northeast Entrance 7350 .0 .0 * .8 .7 114
Parker Peak 9400 .7 1.0 70* 1.9 1.1 173
Sylvan Lake 8420 .4 .2 200* 2.6 1.2 217
Thumb Divide 7980 .3 .0 * .7 .8 88
Two Ocean Plateau 9240 .8 .9 89* 1.9 1.2 158
White Mill 8700 .2 .5 40* 1.1 .9 122
Wolverine 7650 -M .0 * -M .7 *
----- -----
Basin Index (%) 90* 147
WIND RIVER
Burroughs Creek 8750 .1 -M * .8 -M *
Castle Creek 8400 .4 .0 * .8 .6 133
Cold Springs 9630 .5 .0 * .9 .6 150
Deer Park 9700 .2 .4 50* 1.1 1.0 110
Hobbs Park 10100 .9 .5 180* 1.4 .7 200
Kirwin 9550 -M .5 * -M 1.0 *
Little Warm 9370 .6 .0 * 1.3 .7 186
South Pass 9040 .3 .0 * .8 .7 114
St. Lawrence Alt 8620 .2 -M * .7 -M *
Togwotee Pass 9580 .7 .6 117* 1.0 1.1 91
Townsend Creek 8700 .7 .0 * 1.7 .8 212
----- -----
Basin Index (%) 287* 145
BIGHORN BASIN
Bald Mtn. 9380 .9 1.3 69* 1.2 1.2 100
Bear Trap Meadow 8200 .3 .0 * 1.3 .8 162
Bone Springs Div 9350 .5 .8 62* 1.7 1.2 142
Grave Springs 8550 .2 .2 100* 1.1 .7 157
Kirwin 9550 -M .5 * -M 1.0 *
Marquette 8760 -M .1 * -M 1.0 *
Middle Powder 7760 .1 .4 25* 1.7 .8 212
Owl Creek 8975 .6 .4 150* 1.3 .8 162
Powder River Pass 9480 -M .1 * -M 1.0 *
Shell Creek 9580 1.4 1.2 117* 1.9 1.0 190
Timber Creek 7950 1.3 .0 * 2.1 1.0 210
----- -----
Basin Index (%) 123* 164
SHOSHONE RIVER
Blackwater 9780 1.1 .8 138* 1.2 1.2 100
Evening Star 9200 .9 .6 150* 2.2 1.4 157
Marquette 8760 -M .1 * -M 1.0 *
Sylvan Lake 8420 .4 .2 200* 2.6 1.2 217
Sylvan Road 7120 -M .0 * -M .8 *
Younts Peak 8350 -M .1 * -M .6 *
----- -----
Basin Index (%) 150* 158
POWDER RIVER
Bear Trap Meadow 8200 .3 .0 * 1.3 .8 162
Cloud Peak Reservoir 9860 -M .3 * -M 1.2 *
Grave Springs 8550 .2 .2 100* 1.1 .7 157
Hansen Sawmill 8360 -M .0 * 1.0 .9 111
Middle Powder 7760 .1 .4 25* 1.7 .8 212
Powder River Pass 9480 -M .1 * -M 1.0 *
Soldier Park 8720 1.3 .2 650* 1.7 1.0 170
----- -----
Basin Index (%) 238* 162
TONGUE RIVER
Big Goose 7990 1.0 .0 * -M 1.0 *
Bone Springs Div 9350 .5 .8 62* 1.7 1.2 142
Burgess Junction 7880 -M .3 * -M 1.0 *
Dome Lake 8880 1.1 .2 550* 1.8 1.0 180
Little Goose 8870 1.3 .4 325* 2.6 1.2 217
Sucker Creek 8880 1.1 .4 275* 2.3 1.0 230
Tie Creek 6870 .2 .0 * -M .8 *
----- -----
Basin Index (%) 289* 191
BELLE FOURCHE
Blind Park 6890 .1 .0 * .6 .7 86
Cole Canyon 5910 .1 .0 * .6 .6 100
North Rapid Creek 6130 .1 .0 * .7 .6 117
----- -----
Basin Index (%) * 100
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * .6 .7 86
North Rapid Creek 6130 .1 .0 * .7 .6 117
----- -----
Basin Index (%) * 100
UPPER N. PLATTE
Arapaho Ridge 10976 .4 .3 133* .6 .8 75
Blackhall Mtn 9839 .3 .6 50* .9 1.3 69
Cinnabar Park 9707 .1 .3 33* .7 .7 100
Columbine 9167 -M .0 * .2 1.2 17
Divide Peak 8730 .2 .0 * 1.3 1.3 100
Joe Wright 10158 .3 .4 75* .7 1.4 50
Laprele Creek 8390 .2 .0 * .5 .5 100
Med Bow 10512 .3 -M * 1.2 -M *
Never Summer 10323 .3 .8 38* .4 1.0 40
North French Creek 10153 .3 .4 75* .9 1.2 75
Old Battle 9860 .3 .6 50* 1.2 1.2 100
Rawah 9069 .0 .0 * .3 1.2 25
Sage Creek Basin 7850 .1 .0 * .8 .7 114
Sand Lake 10098 .1 .5 20* .4 1.0 40
South Brush Creek 8495 -M .0 * .4 .7 57
Tower 10620 .7 1.0 70* .9 1.4 64
Webber Springs 9260 .2 .0 * .7 1.2 58
Whiskey Park 9020 .2 .0 * .8 1.2 67
Willow Creek Pass 9523 .2 .0 * .4 .6 67
Zirkel 9338 .2 .0 * .7 1.6 44
----- -----
Basin Index (%) 84* 63
SWEETWATER
Deer Park 9700 .2 .4 50* 1.1 1.0 110
Larsen Creek 9000 -M .0 * .9 .7 129
South Pass 9040 .3 .0 * .8 .7 114
----- -----
Basin Index (%) 125* 117
LOWER N. PLATTE
Casper Mtn. 7920 .1 .2 50* 1.5 .8 188
Laprele Creek 8390 .2 .0 * .5 .5 100
Reno Hill 8430 .0 .3 0* 1.0 .8 125
Windy Peak 7915 .2 .0 * .3 .5 60
----- -----
Basin Index (%) 100* 127
LARAMIE RIVER
Brooklyn Lake 10250 .2 .2 100* .6 .6 100
Cinnabar Park 9707 .1 .3 33* .7 .7 100
Crow Creek 8335 .0 .1 0* .9 .5 180
Deadman Hill 10239 .3 .6 50* .1 .6 17
Rawah 9069 .0 .0 * .3 1.2 25
Roach 9740 .2 .0 * .6 .6 100
Windy Peak 7915 .2 .0 * .3 .5 60
----- -----
Basin Index (%) 83* 74
S. PLATTE
Crow Creek 8335 .0 .1 0* .9 .5 180
----- -----
Basin Index (%) 0* 180
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * .6 .8 75
Divide Peak 8730 .2 .0 * 1.3 1.3 100
Elk River 8739 .4 .0 * .6 1.1 55
Elkhead Divide 8800 .1 -M * .7 -M *
Little Snake River 8928 .1 .0 * 1.2 1.7 71
Old Battle 9860 .3 .6 50* 1.2 1.2 100
Sage Creek Basin 7850 .1 .0 * .8 .7 114
Sandstone RS 8152 .0 .0 * .6 .9 67
Whiskey Park 9020 .2 .0 * .8 1.2 67
----- -----
Basin Index (%) 217* 80
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .2 * 1.1 .8 138
Blind Bull Sum 8650 .0 .2 0* 1.0 .7 143
East Rim Divide 7930 -M .0 * .7 .4 175
Elkhart Park G.S. 9400 .0 .0 * 1.9 1.0 190
Gros Ventre Summit 8750 .2 .0 * 1.2 .8 150
Gunsight Pass 9820 .9 .1 900* 2.0 .8 250
Indian Creek 9425 .2 .2 100* 1.1 .8 138
Kendall R.S. 7740 .1 .0 * 1.4 .5 280
Larsen Creek 9000 -M .0 * .9 .7 129
Loomis Park 8240 .2 .0 * 1.2 .6 200
New Fork Lake 8340 -M .0 * -M .4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * .5 .5 100
Spring Creek Divide 9000 .0 .2 0* 1.3 .6 217
Triple Peak 8500 -M .0 * 1.0 .7 143
----- -----
Basin Index (%) 229* 172
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 -M * .9 -M *
Buck Pasture 9632 .5 -M * 1.5 -M *
EF Blacks Fork GS 9360 .4 -M * 1.2 -M *
Hams Fork 7840 -M .0 * .4 .4 100
Henrys Fork 10182 -M -M * 1.9 -M *
Hewinta 9500 .1 .0 * 1.0 .8 125
Hickerson Park 9122 .0 .0 * 2.0 .6 333
Hole-in-Rock 9168 .0 .0 * 1.4 .7 200
Indian Creek 9425 .2 .2 100* 1.1 .8 138
Kelley R.S. 8180 .3 .0 * .9 .6 150
Spirit Lk 10235 .3 .0 * 2.3 1.0 230
Steel Creek Park 10158 .4 .2 200* 1.4 .9 156
----- -----
Basin Index (%) 325* 181
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 1.0 -M *
Bug Lake 7987 .3 .0 * 1.2 .6 200
Burts Miller Ranch 8000 .2 .0 * 1.0 .3 333
Chalk Creek #1 9171 .4 .0 * 1.7 1.0 170
Giveout 6930 -M .0 * .6 .5 120
Hayden Fork 9130 .3 .0 * 1.8 1.0 180
Kelley R.S. 8180 .3 .0 * .9 .6 150
Lily Lake 9133 .1 .0 * 1.3 1.0 130
Monte Cristo 8932 .3 .0 * 1.6 .8 200
Salt River Summit 7640 .0 .0 * .4 .6 67
Spring Creek Divide 9000 .0 .2 0* 1.3 .6 217
Trial Lake 9992 .1 .0 * 1.6 .8 200
----- -----
Basin Index (%) 1000* 172
-----------------------------------------------------------------------------
-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.