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 23 , 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 1.5 87
Blind Bull Sum 8650 .2 .7 29* 1.0 1.3 77
Cottonwood Creek 7670 .1 .0 * 2.7 1.8 150
East Rim Divide 7930 -M .0 * 1.1 .9 122
Grand Targhee 9260 .7 2.5 28* 3.4 3.4 100
Granite Creek 6770 .0 .0 * 1.1 1.2 92
Grassy Lake 7265 -M .2 * 2.1 2.2 95
Gros Ventre Summit 8750 .1 .9 11* 1.7 1.3 131
Gunsight Pass 9820 .5 .6 83* 2.8 1.5 187
Lewis Lake Divide 7850 .1 .0 * 1.2 2.1 57
Loomis Park 8240 .2 .2 100* 1.2 1.4 86
Phillips Bench 8200 .2 .1 200* 1.9 1.9 100
Salt River Summit 7640 .0 .0 * 1.0 1.2 83
Snake River Station 6920 .0 .0 * 1.4 1.4 100
Somsen Ranch 6800 -M .0 * 2.0 1.3 154
Spring Creek Divide 9000 .3 .5 60* 1.4 1.2 117
Thumb Divide 7980 .2 .0 * .8 1.4 57
Togwotee Pass 9580 .1 1.6 6* 1.7 2.0 85
Triple Peak 8500 -M .4 * 1.1 1.6 69
Two Ocean Plateau 9240 1.2 2.4 50* 2.3 2.2 105
Willow Creek 8080 .0 .2 0* 3.1 2.4 129
Younts Peak 8350 -M .7 * -M 1.4 *
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Basin Index (%) 40* 103
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .0 1.8 0* 2.3 2.8 82
Canyon 7870 .1 -M * .9 -M *
Madison Plateau 7750 .0 .7 0* 1.3 1.8 72
West Yellowstone 6700 .1 .0 * .8 1.1 73
Whiskey Creek 6800 .1 .0 * 1.3 1.4 93
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Basin Index (%) 8* 80
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 1.0 1.6 62* 1.7 1.5 113
Canyon 7870 .1 -M * .9 -M *
Evening Star 9200 .1 1.3 8* 3.5 2.3 152
Fisher Creek 9100 .1 1.8 6* 1.9 2.4 79
Monument Peak 8850 .1 1.3 8* 2.2 1.9 116
Northeast Entrance 7350 .0 .0 * 1.0 1.2 83
Parker Peak 9400 .0 1.4 0* 2.5 2.0 125
Sylvan Lake 8420 .0 1.0 0* 2.9 2.0 145
Thumb Divide 7980 .2 .0 * .8 1.4 57
Two Ocean Plateau 9240 1.2 2.4 50* 2.3 2.2 105
White Mill 8700 .0 1.2 0* 1.5 1.8 83
Wolverine 7650 .0 .0 * 2.1 1.4 150
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Basin Index (%) 22* 111
WIND RIVER
Burroughs Creek 8750 .0 -M * .9 -M *
Castle Creek 8400 .0 .0 * 1.3 1.1 118
Cold Springs 9630 .2 .3 67* 1.9 1.3 146
Deer Park 9700 .0 .8 0* 2.0 1.4 143
Hobbs Park 10100 2.5 1.3 192* 3.7 1.6 231
Kirwin 9550 2.6 1.2 217* 3.6 1.4 257
Little Warm 9370 .1 .8 12* 1.9 1.3 146
South Pass 9040 .0 .5 0* 1.6 1.5 107
St. Lawrence Alt 8620 .0 -M * 2.0 -M *
Togwotee Pass 9580 .1 1.6 6* 1.7 2.0 85
Townsend Creek 8700 .6 .2 300* 3.1 1.5 207
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Basin Index (%) 91* 159
BIGHORN BASIN
Bald Mtn. 9380 2.0 2.2 91 2.5 2.1 119
Bear Trap Meadow 8200 .2 .3 67* 2.9 1.2 242
Bone Springs Div 9350 1.4 1.6 88* 2.9 2.0 145
Grave Springs 8550 .0 .4 0* 1.9 1.2 158
Kirwin 9550 2.6 1.2 217* 3.6 1.4 257
Marquette 8760 3.9 .7 557* 6.6 1.5 440
Middle Powder 7760 .0 .4 0* 3.2 1.6 200
Owl Creek 8975 .0 .4 0* 1.8 1.0 180
Powder River Pass 9480 .1 1.0 10* 2.4 1.6 150
Shell Creek 9580 2.1 2.4 88 3.1 2.0 155
Timber Creek 7950 1.4 .2 700* 4.5 1.4 321
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Basin Index (%) 127* 208
SHOSHONE RIVER
Blackwater 9780 1.9 1.7 112* 2.7 2.0 135
Evening Star 9200 .1 1.3 8* 3.5 2.3 152
Marquette 8760 3.9 .7 557* 6.6 1.5 440
Sylvan Lake 8420 .0 1.0 0* 2.9 2.0 145
Sylvan Road 7120 .0 .0 * 2.0 1.4 143
Younts Peak 8350 -M .7 * -M 1.4 *
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Basin Index (%) 126* 192
POWDER RIVER
Bear Trap Meadow 8200 .2 .3 67* 2.9 1.2 242
Cloud Peak Reservoir 9860 3.0 1.2 250* 5.2 2.0 260
Grave Springs 8550 .0 .4 0* 1.9 1.2 158
Hansen Sawmill 8360 .8 .0 * 2.4 1.3 185
Middle Powder 7760 .0 .4 0* 3.2 1.6 200
Powder River Pass 9480 .1 1.0 10* 2.4 1.6 150
Soldier Park 8720 .6 .0 * 3.5 1.5 233
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Basin Index (%) 142* 207
TONGUE RIVER
Big Goose 7990 .3 .4 75* 3.8 1.5 253
Bone Springs Div 9350 1.4 1.6 88* 2.9 2.0 145
Burgess Junction 7880 1.1 .8 138* 4.2 1.8 233
Dome Lake 8880 1.9 1.0 190* 4.0 1.9 211
Little Goose 8870 1.6 .0 * 4.5 1.6 281
Sucker Creek 8880 1.9 1.1 173* 4.8 1.6 300
Tie Creek 6870 .1 .0 * 5.0 1.6 312
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Basin Index (%) 169* 243
BELLE FOURCHE
Blind Park 6890 .1 .0 * 1.6 1.3 123
Cole Canyon 5910 .1 .0 * 1.2 1.2 100
North Rapid Creek 6130 .0 .0 * 2.2 1.1 200
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Basin Index (%) * 139
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 1.6 1.3 123
North Rapid Creek 6130 .0 .0 * 2.2 1.1 200
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Basin Index (%) * 158
UPPER N. PLATTE
Arapaho Ridge 10976 .1 1.6 6* 1.2 2.2 55
Blackhall Mtn 9839 .2 1.6 12* 2.4 3.2 75
Cinnabar Park 9707 .1 .8 12* .9 1.8 50
Columbine 9167 -M .0 * 1.3 2.0 65
Divide Peak 8730 .1 .6 17* 2.8 2.3 122
Joe Wright 10158 .1 .8 12* 1.8 2.6 69
Laprele Creek 8390 .2 .0 * 2.8 1.2 233
Med Bow 10512 1.2 -M * 2.3 -M *
Never Summer 10323 1.2 1.6 75* 1.3 1.9 68
North French Creek 10153 .1 1.1 9* 1.9 2.2 86
Old Battle 9860 .3 1.2 25* 2.0 2.6 77
Rawah 9069 .0 .3 0* 1.7 2.0 85
Sage Creek Basin 7850 .1 .0 * 1.4 1.7 82
Sand Lake 10098 1.8 2.0 90* 2.0 2.1 95
South Brush Creek 8495 -M .2 * 1.2 1.5 80
Tower 10620 .3 1.2 25* 2.3 2.8 82
Webber Springs 9260 .1 .5 20* 1.4 2.3 61
Whiskey Park 9020 .0 .4 0* 1.4 2.4 58
Willow Creek Pass 9523 .9 .4 225* 1.3 1.4 93
Zirkel 9338 .1 .2 50* 1.2 2.6 46
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Basin Index (%) 40* 79
SWEETWATER
Deer Park 9700 .0 .8 0* 2.0 1.4 143
Larsen Creek 9000 -M .0 * 1.1 1.2 92
South Pass 9040 .0 .5 0* 1.6 1.5 107
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Basin Index (%) 0* 115
LOWER N. PLATTE
Casper Mtn. 7920 2.2 .1 2200* 5.4 1.4 386
Laprele Creek 8390 .2 .0 * 2.8 1.2 233
Reno Hill 8430 1.4 .6 233* 4.4 1.6 275
Windy Peak 7915 .2 .0 * 2.0 1.1 182
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Basin Index (%) 571* 275
LARAMIE RIVER
Brooklyn Lake 10250 .1 .3 33* 1.0 1.4 71
Cinnabar Park 9707 .1 .8 12* .9 1.8 50
Crow Creek 8335 .0 .0 * 1.7 1.5 113
Deadman Hill 10239 1.4 1.2 117* 1.4 2.0 70
Rawah 9069 .0 .3 0* 1.7 2.0 85
Roach 9740 .1 .6 17* 1.3 1.8 72
Windy Peak 7915 .2 .0 * 2.0 1.1 182
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Basin Index (%) 59* 86
S. PLATTE
Crow Creek 8335 .0 .0 * 1.7 1.5 113
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Basin Index (%) * 113
LITTLE SNAKE RIVER
Battle Mountain 7498 .0 .0 * 1.7 1.4 121
Divide Peak 8730 .1 .6 17* 2.8 2.3 122
Elk River 8739 .3 .0 * 1.1 1.8 61
Elkhead Divide 8800 .1 -M * 1.4 -M *
Little Snake River 8928 .1 .2 50* 1.7 2.8 61
Old Battle 9860 .3 1.2 25* 2.0 2.6 77
Sage Creek Basin 7850 .1 .0 * 1.4 1.7 82
Sandstone RS 8152 -M .0 * 1.2 1.5 80
Whiskey Park 9020 .0 .4 0* 1.4 2.4 58
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Basin Index (%) 38* 81
UPPER GREEN RIVER
Big Sandy Opening 9080 -M .8 * 1.3 1.2 108
Blind Bull Sum 8650 .2 .7 29* 1.0 1.3 77
East Rim Divide 7930 -M .0 * 1.1 .9 122
Elkhart Park G.S. 9400 .0 .6 0* 2.0 1.4 143
Gros Ventre Summit 8750 .1 .9 11* 1.7 1.3 131
Gunsight Pass 9820 .5 .6 83* 2.8 1.5 187
Indian Creek 9425 .3 1.0 30* 1.5 1.6 94
Kendall R.S. 7740 .1 .0 * 1.5 1.2 125
Larsen Creek 9000 -M .0 * 1.1 1.2 92
Loomis Park 8240 .2 .2 100* 1.2 1.4 86
New Fork Lake 8340 -M .0 * -M 1.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M .0 * .5 1.0 50
Spring Creek Divide 9000 .3 .5 60* 1.4 1.2 117
Triple Peak 8500 -M .4 * 1.1 1.6 69
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Basin Index (%) 38* 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 .1 .0 * 1.3 1.1 118
Buck Pasture 9632 .0 -M * 1.9 -M *
EF Blacks Fork GS 9360 .0 .0 * 1.4 1.2 117
Hams Fork 7840 -M .0 * -M 1.1 *
Henrys Fork 10182 -M -M * 1.8 -M *
Hewinta 9500 .1 .0 * 1.4 1.3 108
Hickerson Park 9122 .2 .0 * 2.2 1.0 220
Hole-in-Rock 9168 .0 .0 * 1.7 1.4 121
Indian Creek 9425 .3 1.0 30* 1.5 1.6 94
Kelley R.S. 8180 .3 .1 300* 1.0 1.3 77
Spirit Lk 10235 .1 .0 * 2.7 1.4 193
Steel Creek Park 10158 .2 .7 29* 1.8 1.6 112
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Basin Index (%) 72* 126
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 1.0 -M *
Bug Lake 7987 .3 .0 * 1.2 1.3 92
Burts Miller Ranch 8000 .2 .0 * 1.1 .7 157
Chalk Creek #1 9171 .2 .0 * 2.1 1.8 117
Giveout 6930 -M .0 * .6 1.1 55
Hayden Fork 9130 .1 .0 * 2.0 1.8 111
Kelley R.S. 8180 .3 .1 300* 1.0 1.3 77
Lily Lake 9133 .1 .0 * 1.5 1.5 100
Monte Cristo 8932 .0 .0 * 1.6 1.7 94
Salt River Summit 7640 .0 .0 * 1.0 1.2 83
Spring Creek Divide 9000 .3 .5 60* 1.4 1.2 117
Trial Lake 9992 .0 .2 0* 1.7 1.5 113
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Basin Index (%) 188* 101
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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.