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 20 , 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 * 1.3 1.4 93
Blind Bull Sum 8650 .1 .6 17* 1.0 1.0 100
Cottonwood Creek 7670 .1 .0 * 2.7 1.5 180
East Rim Divide 7930 -M .0 * 1.0 .6 167
Grand Targhee 9260 1.0 2.4 42* 3.5 2.8 125
Granite Creek 6770 .0 .0 * 1.0 1.0 100
Grassy Lake 7265 -M .0 * 2.0 2.0 100
Gros Ventre Summit 8750 .2 .8 25* 1.8 1.0 180
Gunsight Pass 9820 1.0 .2 500* 2.8 1.2 233
Lewis Lake Divide 7850 .1 .0 * 1.3 1.7 76
Loomis Park 8240 .2 .0 * 1.2 1.2 100
Phillips Bench 8200 .2 .0 * 1.9 1.4 136
Salt River Summit 7640 .0 .0 * .9 1.0 90
Snake River Station 6920 .0 .0 * 1.4 1.3 108
Somsen Ranch 6800 -M .0 * 2.1 1.1 191
Spring Creek Divide 9000 .3 .5 60* 1.3 1.2 108
Thumb Divide 7980 .2 .0 * .8 1.3 62
Togwotee Pass 9580 .1 1.4 7* 1.6 2.0 80
Triple Peak 8500 -M .2 * 1.1 1.2 92
Two Ocean Plateau 9240 1.2 2.0 60* 2.3 1.6 144
Willow Creek 8080 -M .0 * 3.1 2.2 141
Younts Peak 8350 -M .5 * -M 1.1 *
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Basin Index (%) 59* 122
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .2 1.6 12* 2.3 2.4 96
Canyon 7870 .0 -M * .9 -M *
Madison Plateau 7750 .0 .6 0* 1.3 1.8 72
West Yellowstone 6700 .0 .0 * .8 1.0 80
Whiskey Creek 6800 .0 .0 * 1.2 1.2 100
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Basin Index (%) 9* 88
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 1.1 1.4 79* 1.8 1.4 129
Canyon 7870 .0 -M * .9 -M *
Evening Star 9200 1.0 1.2 83* 3.5 2.1 167
Fisher Creek 9100 .0 1.4 0* 1.7 1.9 89
Monument Peak 8850 .4 1.1 36* 2.2 1.7 129
Northeast Entrance 7350 .0 .0 * .8 1.0 80
Parker Peak 9400 .3 1.2 25* 2.5 1.8 139
Sylvan Lake 8420 .0 .8 0* 3.0 2.0 150
Thumb Divide 7980 .2 .0 * .8 1.3 62
Two Ocean Plateau 9240 1.2 2.0 60* 2.3 1.6 144
White Mill 8700 .0 1.0 0* 1.3 1.4 93
Wolverine 7650 .1 .0 * 2.0 1.3 154
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Basin Index (%) 43* 125
WIND RIVER
Burroughs Creek 8750 .0 -M * .9 -M *
Castle Creek 8400 .0 .0 * 1.2 .9 133
Cold Springs 9630 .7 .0 * 1.8 1.0 180
Deer Park 9700 .0 .7 0* 2.0 1.4 143
Hobbs Park 10100 2.6 .9 289* 3.7 1.2 308
Kirwin 9550 2.6 1.0 260* 3.6 1.2 300
Little Warm 9370 .5 .4 125* 2.0 1.2 167
South Pass 9040 .1 .2 50* 1.7 1.1 155
St. Lawrence Alt 8620 .0 -M * 2.0 -M *
Togwotee Pass 9580 .1 1.4 7* 1.6 2.0 80
Townsend Creek 8700 1.1 .0 * 3.1 1.2 258
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Basin Index (%) 167* 185
BIGHORN BASIN
Bald Mtn. 9380 2.0 2.0 100* 2.5 1.8 139
Bear Trap Meadow 8200 .2 .1 200* 2.9 1.2 242
Bone Springs Div 9350 1.6 1.4 114* 2.9 1.8 161
Grave Springs 8550 .1 .2 50* 1.9 1.0 190
Kirwin 9550 2.6 1.0 260* 3.6 1.2 300
Marquette 8760 4.3 .2 2150* 6.6 1.4 471
Middle Powder 7760 .1 .2 50* 3.2 1.3 246
Owl Creek 8975 .1 .1 100* 1.9 1.0 190
Powder River Pass 9480 .7 .8 88* 2.4 1.4 171
Shell Creek 9580 2.1 1.8 117 3.1 1.6 194
Timber Creek 7950 2.0 .0 * 4.5 1.2 375
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Basin Index (%) 203* 238
SHOSHONE RIVER
Blackwater 9780 2.0 1.6 125* 2.8 1.9 147
Evening Star 9200 1.0 1.2 83* 3.5 2.1 167
Marquette 8760 4.3 .2 2150* 6.6 1.4 471
Sylvan Lake 8420 .0 .8 0* 3.0 2.0 150
Sylvan Road 7120 .0 .0 * 2.0 1.4 143
Younts Peak 8350 -M .5 * -M 1.1 *
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Basin Index (%) 192* 203
POWDER RIVER
Bear Trap Meadow 8200 .2 .1 200* 2.9 1.2 242
Cloud Peak Reservoir 9860 3.3 .9 367* 5.3 1.8 294
Grave Springs 8550 .1 .2 50* 1.9 1.0 190
Hansen Sawmill 8360 1.8 .0 * 2.5 1.2 208
Middle Powder 7760 .1 .2 50* 3.2 1.3 246
Powder River Pass 9480 .7 .8 88* 2.4 1.4 171
Soldier Park 8720 1.6 .0 * 3.5 1.3 269
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Basin Index (%) 355* 236
TONGUE RIVER
Big Goose 7990 1.2 .2 600* 3.8 1.4 271
Bone Springs Div 9350 1.6 1.4 114* 2.9 1.8 161
Burgess Junction 7880 1.6 .5 320* 4.3 1.4 307
Dome Lake 8880 2.2 .8 275* 4.1 1.5 273
Little Goose 8870 2.1 .0 * 4.5 1.5 300
Sucker Creek 8880 2.4 .8 300* 4.8 1.5 320
Tie Creek 6870 .1 .0 * 5.0 1.2 417
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Basin Index (%) 303* 285
BELLE FOURCHE
Blind Park 6890 .1 .0 * 1.7 1.1 155
Cole Canyon 5910 .1 .0 * 1.2 1.0 120
North Rapid Creek 6130 .0 .0 * 2.1 .9 233
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Basin Index (%) * 167
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 1.7 1.1 155
North Rapid Creek 6130 .0 .0 * 2.1 .9 233
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Basin Index (%) * 190
UPPER N. PLATTE
Arapaho Ridge 10976 .2 1.0 20* 1.2 1.6 75
Blackhall Mtn 9839 .9 1.2 75* 2.4 2.4 100
Cinnabar Park 9707 .0 .5 0* .9 1.5 60
Columbine 9167 -M .0 * 1.3 1.8 72
Divide Peak 8730 .2 .2 100* 2.8 1.8 156
Joe Wright 10158 .1 .4 25* 1.8 2.3 78
Laprele Creek 8390 .9 .0 * 2.8 1.0 280
Med Bow 10512 1.2 -M * 2.3 -M *
Never Summer 10323 1.3 1.0 130* 1.3 1.8 72
North French Creek 10153 .6 .8 75* 1.9 2.0 95
Old Battle 9860 .6 1.2 50* 2.0 2.3 87
Rawah 9069 .2 .0 * 1.7 1.6 106
Sage Creek Basin 7850 .1 .0 * 1.4 1.1 127
Sand Lake 10098 1.9 1.4 136* 2.1 1.7 124
South Brush Creek 8495 -M .0 * 1.3 1.0 130
Tower 10620 1.2 1.0 120* 2.4 2.3 104
Webber Springs 9260 .1 .4 25* 1.4 1.8 78
Whiskey Park 9020 .0 .2 0* 1.4 1.8 78
Willow Creek Pass 9523 .9 .2 450* 1.3 1.2 108
Zirkel 9338 .1 .0 * 1.3 2.2 59
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Basin Index (%) 98* 98
SWEETWATER
Deer Park 9700 .0 .7 0* 2.0 1.4 143
Larsen Creek 9000 -M .0 * 1.1 .8 138
South Pass 9040 .1 .2 50* 1.7 1.1 155
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Basin Index (%) 11* 145
LOWER N. PLATTE
Casper Mtn. 7920 3.2 .0 * 5.4 1.2 450
Laprele Creek 8390 .9 .0 * 2.8 1.0 280
Reno Hill 8430 2.2 .6 367* 4.4 1.3 338
Windy Peak 7915 .2 .0 * 2.0 1.0 200
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Basin Index (%) 1083* 324
LARAMIE RIVER
Brooklyn Lake 10250 .1 .2 50* 1.0 1.0 100
Cinnabar Park 9707 .0 .5 0* .9 1.5 60
Crow Creek 8335 .0 .0 * 1.6 1.0 160
Deadman Hill 10239 1.4 1.2 117* 1.4 1.3 108
Rawah 9069 .2 .0 * 1.7 1.6 106
Roach 9740 .2 .5 40* 1.3 1.2 108
Windy Peak 7915 .2 .0 * 2.0 1.0 200
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Basin Index (%) 88* 115
S. PLATTE
Crow Creek 8335 .0 .0 * 1.6 1.0 160
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Basin Index (%) * 160
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 1.7 1.2 142
Divide Peak 8730 .2 .2 100* 2.8 1.8 156
Elk River 8739 .3 .0 * 1.1 1.4 79
Elkhead Divide 8800 .1 -M * 1.4 -M *
Little Snake River 8928 .1 .0 * 1.7 2.6 65
Old Battle 9860 .6 1.2 50* 2.0 2.3 87
Sage Creek Basin 7850 .1 .0 * 1.4 1.1 127
Sandstone RS 8152 -M .0 * 1.2 1.2 100
Whiskey Park 9020 .0 .2 0* 1.4 1.8 78
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Basin Index (%) 81* 99
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .6 * 1.3 1.2 108
Blind Bull Sum 8650 .1 .6 17* 1.0 1.0 100
East Rim Divide 7930 -M .0 * 1.0 .6 167
Elkhart Park G.S. 9400 .0 .4 0* 2.0 1.4 143
Gros Ventre Summit 8750 .2 .8 25* 1.8 1.0 180
Gunsight Pass 9820 1.0 .2 500* 2.8 1.2 233
Indian Creek 9425 .3 .7 43* 1.5 1.4 107
Kendall R.S. 7740 .0 .0 * 1.5 .8 188
Larsen Creek 9000 -M .0 * 1.1 .8 138
Loomis Park 8240 .2 .0 * 1.2 1.2 100
New Fork Lake 8340 -M .0 * -M .7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * .5 .8 62
Spring Creek Divide 9000 .3 .5 60* 1.3 1.2 108
Triple Peak 8500 -M .2 * 1.1 1.2 92
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Basin Index (%) 66* 131
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 1.4 -M *
Buck Pasture 9632 .0 -M * 1.8 -M *
EF Blacks Fork GS 9360 .0 -M * 1.5 -M *
Hams Fork 7840 -M .0 * -M .9 *
Henrys Fork 10182 -M -M * 2.0 -M *
Hewinta 9500 .0 .0 * 1.3 1.2 108
Hickerson Park 9122 .0 .0 * 2.3 .9 256
Hole-in-Rock 9168 .0 .0 * 1.6 1.0 160
Indian Creek 9425 .3 .7 43* 1.5 1.4 107
Kelley R.S. 8180 .3 .0 * 1.0 1.0 100
Spirit Lk 10235 .0 .0 * 2.6 1.4 186
Steel Creek Park 10158 .5 .6 83* 1.8 1.2 150
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Basin Index (%) 85* 149
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 1.1 -M *
Bug Lake 7987 .3 .0 * 1.2 1.1 109
Burts Miller Ranch 8000 .1 .0 * 1.1 .6 183
Chalk Creek #1 9171 .2 .0 * 2.1 1.4 150
Giveout 6930 -M .0 * .6 .9 67
Hayden Fork 9130 .0 .0 * 2.1 1.4 150
Kelley R.S. 8180 .3 .0 * 1.0 1.0 100
Lily Lake 9133 .1 .0 * 1.6 1.2 133
Monte Cristo 8932 .1 .0 * 1.7 1.4 121
Salt River Summit 7640 .0 .0 * .9 1.0 90
Spring Creek Divide 9000 .3 .5 60* 1.3 1.2 108
Trial Lake 9992 .0 .0 * 1.8 1.4 129
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Basin Index (%) 280* 122
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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.