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 15 , 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 * 1.4 1.1 127
Blind Bull Sum 8650 -M .2 * 1.0 .8 125
Cottonwood Creek 7670 .1 .0 * 2.7 1.3 208
East Rim Divide 7930 -M .0 * .8 .6 133
Grand Targhee 9260 1.4 1.5 93* 3.4 2.4 142
Granite Creek 6770 -M .0 * 1.0 .6 167
Grassy Lake 7265 -M .0 * 2.0 1.5 133
Gros Ventre Summit 8750 .6 .2 300* 1.8 .9 200
Gunsight Pass 9820 1.5 .0 * 2.8 1.0 280
Lewis Lake Divide 7850 .1 .0 * 1.2 1.4 86
Loomis Park 8240 .2 .0 * 1.1 .9 122
Phillips Bench 8200 .2 .0 * 1.9 1.2 158
Salt River Summit 7640 -M .0 * .6 .8 75
Snake River Station 6920 .0 .0 * 1.3 1.0 130
Somsen Ranch 6800 -M .0 * 2.0 .9 222
Spring Creek Divide 9000 .0 .1 0* 1.4 .8 175
Thumb Divide 7980 .1 .0 * .8 1.0 80
Togwotee Pass 9580 .8 1.0 80* 1.6 1.4 114
Triple Peak 8500 -M .0 * 1.1 1.0 110
Two Ocean Plateau 9240 1.2 1.2 100* 2.3 1.5 153
Willow Creek 8080 -M .0 * 3.1 1.4 221
Younts Peak 8350 -M .2 * -M .9 *
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Basin Index (%) 155* 150
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .7 .9 78* 2.2 2.0 110
Canyon 7870 .1 -M * .9 -M *
Madison Plateau 7750 .0 .3 0* 1.4 1.4 100
West Yellowstone 6700 .0 .0 * .8 .8 100
Whiskey Creek 6800 .0 .0 * 1.3 1.2 108
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Basin Index (%) 58* 106
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 1.2 1.0 120* 1.6 1.1 145
Canyon 7870 .1 -M * .9 -M *
Evening Star 9200 1.8 1.0 180* 3.2 1.8 178
Fisher Creek 9100 .2 1.2 17* 1.5 1.6 94
Monument Peak 8850 .9 .7 129* 2.2 1.6 138
Northeast Entrance 7350 .0 .0 * .8 .8 100
Parker Peak 9400 1.1 1.2 92* 2.4 1.4 171
Sylvan Lake 8420 .1 .5 20* 3.0 1.7 176
Thumb Divide 7980 .1 .0 * .8 1.0 80
Two Ocean Plateau 9240 1.2 1.2 100* 2.3 1.5 153
White Mill 8700 .3 .8 38* 1.2 1.2 100
Wolverine 7650 .0 .0 * 1.9 1.0 190
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Basin Index (%) 91* 142
WIND RIVER
Burroughs Creek 8750 .0 -M * 1.0 -M *
Castle Creek 8400 .4 .0 * 1.2 .6 200
Cold Springs 9630 1.3 .0 * 1.8 .8 225
Deer Park 9700 1.0 .5 200* 1.9 1.2 158
Hobbs Park 10100 2.7 .6 450* 3.5 .9 389
Kirwin 9550 2.6 .7 371* 3.3 1.0 330
Little Warm 9370 .9 .0 * 1.8 .8 225
South Pass 9040 .8 .0 * 1.6 1.0 160
St. Lawrence Alt 8620 .9 -M * 2.0 -M *
Togwotee Pass 9580 .8 1.0 80* 1.6 1.4 114
Townsend Creek 8700 1.5 .0 * 3.0 1.0 300
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Basin Index (%) 429* 226
BIGHORN BASIN
Bald Mtn. 9380 1.8 1.6 112* 2.3 1.4 164
Bear Trap Meadow 8200 1.2 .0 * 2.7 1.0 270
Bone Springs Div 9350 1.5 1.0 150* 2.8 1.5 187
Grave Springs 8550 .5 .1 500* 1.9 1.0 190
Kirwin 9550 2.6 .7 371* 3.3 1.0 330
Marquette 8760 -M .2 * -M 1.2 *
Middle Powder 7760 .8 .4 200* 3.0 1.0 300
Owl Creek 8975 .9 .0 * 1.8 .8 225
Powder River Pass 9480 1.1 .4 275* 2.4 1.2 200
Shell Creek 9580 2.1 1.6 131* 3.0 1.2 250
Timber Creek 7950 2.8 .0 * 4.3 1.0 430
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Basin Index (%) 264* 248
SHOSHONE RIVER
Blackwater 9780 2.2 1.2 183* 2.4 1.6 150
Evening Star 9200 1.8 1.0 180* 3.2 1.8 178
Marquette 8760 -M .2 * -M 1.2 *
Sylvan Lake 8420 .1 .5 20* 3.0 1.7 176
Sylvan Road 7120 .0 .0 * 2.1 1.2 175
Younts Peak 8350 -M .2 * -M .9 *
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Basin Index (%) 152* 170
POWDER RIVER
Bear Trap Meadow 8200 1.2 .0 * 2.7 1.0 270
Cloud Peak Reservoir 9860 3.9 .6 650* 5.1 1.4 364
Grave Springs 8550 .5 .1 500* 1.9 1.0 190
Hansen Sawmill 8360 2.5 .0 * 2.6 1.0 260
Middle Powder 7760 .8 .4 200* 3.0 1.0 300
Powder River Pass 9480 1.1 .4 275* 2.4 1.2 200
Soldier Park 8720 2.5 .0 * 3.4 1.2 283
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Basin Index (%) 833* 271
TONGUE RIVER
Big Goose 7990 -M .2 * 3.9 1.2 325
Bone Springs Div 9350 1.5 1.0 150* 2.8 1.5 187
Burgess Junction 7880 2.0 .4 500* 4.2 1.2 350
Dome Lake 8880 2.6 .4 650* 3.9 1.2 325
Little Goose 8870 3.0 .2 1500* 4.4 1.4 314
Sucker Creek 8880 2.9 .4 725* 4.5 1.2 375
Tie Creek 6870 1.6 .0 * 4.9 1.0 490
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Basin Index (%) 567* 329
BELLE FOURCHE
Blind Park 6890 .2 .0 * 1.6 1.0 160
Cole Canyon 5910 .0 .0 * 1.2 .8 150
North Rapid Creek 6130 .0 .0 * 2.3 .7 329
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Basin Index (%) * 204
CHEYENNE RIVER BASIN
Blind Park 6890 .2 .0 * 1.6 1.0 160
North Rapid Creek 6130 .0 .0 * 2.3 .7 329
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Basin Index (%) * 229
UPPER N. PLATTE
Arapaho Ridge 10976 .8 1.0 80* 1.2 1.4 86
Blackhall Mtn 9839 1.4 1.0 140* 2.3 1.4 164
Cinnabar Park 9707 .2 .1 200* .9 .9 100
Columbine 9167 .2 .0 * 1.2 1.4 86
Divide Peak 8730 1.2 .0 * 2.8 1.4 200
Joe Wright 10158 1.2 .3 400* 1.9 1.6 119
Laprele Creek 8390 1.7 .0 * 2.8 .7 400
Med Bow 10512 1.2 -M * 2.3 -M *
Never Summer 10323 1.3 .8 162* 1.3 1.5 87
North French Creek 10153 .8 .4 200* 1.8 1.5 120
Old Battle 9860 .9 .7 129* 1.8 1.6 112
Rawah 9069 1.0 .0 * 1.7 1.4 121
Sage Creek Basin 7850 .6 .0 * 1.5 1.0 150
Sand Lake 10098 1.8 .8 225* 1.9 1.2 158
South Brush Creek 8495 .5 .0 * 1.2 .8 150
Tower 10620 1.8 .6 300* 2.1 2.0 105
Webber Springs 9260 .5 .0 * 1.2 1.4 86
Whiskey Park 9020 .7 .0 * 1.4 1.4 100
Willow Creek Pass 9523 .9 .1 900* 1.2 1.0 120
Zirkel 9338 .4 .0 * 1.2 1.7 71
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Basin Index (%) 309* 124
SWEETWATER
Deer Park 9700 1.0 .5 200* 1.9 1.2 158
Larsen Creek 9000 -M .0 * 1.1 .8 138
South Pass 9040 .8 .0 * 1.6 1.0 160
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Basin Index (%) 360* 153
LOWER N. PLATTE
Casper Mtn. 7920 4.1 .1 4100* 5.4 1.0 540
Laprele Creek 8390 1.7 .0 * 2.8 .7 400
Reno Hill 8430 2.5 .2 1250* 4.3 1.0 430
Windy Peak 7915 1.4 .0 * 1.8 .6 300
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Basin Index (%) 3233* 433
LARAMIE RIVER
Brooklyn Lake 10250 .6 .0 * 1.0 .8 125
Cinnabar Park 9707 .2 .1 200* .9 .9 100
Crow Creek 8335 .4 .0 * 1.7 .7 243
Deadman Hill 10239 1.5 .6 250* 1.3 1.0 130
Rawah 9069 1.0 .0 * 1.7 1.4 121
Roach 9740 .9 .2 450* 1.3 1.1 118
Windy Peak 7915 1.4 .0 * 1.8 .6 300
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Basin Index (%) 667* 149
S. PLATTE
Crow Creek 8335 .4 .0 * 1.7 .7 243
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Basin Index (%) * 243
LITTLE SNAKE RIVER
Battle Mountain 7498 .3 .0 * 1.6 .9 178
Divide Peak 8730 1.2 .0 * 2.8 1.4 200
Elk River 8739 .6 .0 * 1.1 1.2 92
Elkhead Divide 8800 .5 -M * 1.4 -M *
Little Snake River 8928 .1 .0 * 1.7 1.8 94
Old Battle 9860 .9 .7 129* 1.8 1.6 112
Sage Creek Basin 7850 .6 .0 * 1.5 1.0 150
Sandstone RS 8152 .4 .0 * 1.2 1.0 120
Whiskey Park 9020 .7 .0 * 1.4 1.4 100
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Basin Index (%) 686* 127
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .2 * 1.2 1.0 120
Blind Bull Sum 8650 -M .2 * 1.0 .8 125
East Rim Divide 7930 -M .0 * .8 .6 133
Elkhart Park G.S. 9400 .0 .0 * 2.0 1.0 200
Gros Ventre Summit 8750 .6 .2 300* 1.8 .9 200
Gunsight Pass 9820 1.5 .0 * 2.8 1.0 280
Indian Creek 9425 .3 .2 150* 1.4 1.0 140
Kendall R.S. 7740 .0 .0 * 1.5 .7 214
Larsen Creek 9000 -M .0 * 1.1 .8 138
Loomis Park 8240 .2 .0 * 1.1 .9 122
New Fork Lake 8340 -M .0 * .2 .6 33
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * .5 .6 83
Spring Creek Divide 9000 .0 .1 0* 1.4 .8 175
Triple Peak 8500 -M .0 * 1.1 1.0 110
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Basin Index (%) 520* 153
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 1.4 -M *
Buck Pasture 9632 .2 -M * 1.8 -M *
EF Blacks Fork GS 9360 .3 -M * 1.5 -M *
Hams Fork 7840 -M .0 * .5 .6 83
Henrys Fork 10182 -M -M * 2.0 -M *
Hewinta 9500 .0 .0 * 1.3 1.0 130
Hickerson Park 9122 .0 .0 * 2.4 .7 343
Hole-in-Rock 9168 .0 .0 * 1.6 .8 200
Indian Creek 9425 .3 .2 150* 1.4 1.0 140
Kelley R.S. 8180 .2 .0 * 1.0 .7 143
Spirit Lk 10235 .4 .0 * 2.6 1.0 260
Steel Creek Park 10158 .8 .0 * 1.8 1.0 180
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Basin Index (%) 850* 185
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 .1 .0 * 1.1 .3 367
Chalk Creek #1 9171 .3 .0 * 2.0 1.2 167
Giveout 6930 -M .0 * .5 .7 71
Hayden Fork 9130 .0 .0 * 2.1 1.0 210
Kelley R.S. 8180 .2 .0 * 1.0 .7 143
Lily Lake 9133 .1 .0 * 1.6 1.1 145
Monte Cristo 8932 .0 .0 * 1.7 .8 212
Salt River Summit 7640 -M .0 * .6 .8 75
Spring Creek Divide 9000 .0 .1 0* 1.4 .8 175
Trial Lake 9992 .0 .0 * 1.7 .9 189
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Basin Index (%) 1000* 167
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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.