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 TUESDAY: OCTOBER 19 , 2021
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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 .0 .0 * 1.4 1.2 117
Blind Bull Sum 8650 1.0 .4 250* 1.9 1.0 190
Cottonwood Creek 7670 .2 .0 * 3.1 1.4 221
East Rim Divide 7930 .1 .0 * 1.5 .6 250
Grand Targhee 9260 2.3 2.4 96* 4.8 2.6 185
Granite Creek 6770 -M .0 * 1.6 .8 200
Grassy Lake 7265 .5 .0 * 2.6 1.8 144
Gros Ventre Summit 8750 1.2 .6 200* 1.2 1.0 120
Gunsight Pass 9820 1.0 .2 500* 2.1 1.1 191
Lewis Lake Divide 7850 .6 .0 * 3.8 1.6 238
Loomis Park 8240 .0 .0 * 1.7 .9 189
Phillips Bench 8200 .7 .0 * 2.4 1.3 185
Salt River Summit 7640 .0 .0 * 2.6 .8 325
Snake River Station 6920 .2 .0 * 1.8 1.0 180
Somsen Ranch 6800 .0 .0 * 3.9 1.0 390
Spring Creek Divide 9000 1.1 .4 275* 2.6 1.1 236
Thumb Divide 7980 1.0 .0 * 2.1 1.2 175
Togwotee Pass 9580 1.5 -M * 2.2 -M *
Triple Peak 8500 .2 .2 100* 2.5 1.2 208
Two Ocean Plateau 9240 1.5 1.8 83* 1.4 1.6 88
Willow Creek 8080 .2 .0 * 3.8 2.0 190
Younts Peak 8350 .4 -M * .7 -M *
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Basin Index (%) 197* 194
MADISON HEADWATERS IN WYOMING
Black Bear 8170 1.4 1.5 93* 2.4 2.1 114
Canyon 7870 .6 -M * 1.2 -M *
Madison Plateau 7750 1.1 .5 220* 1.6 1.7 94
West Yellowstone 6700 .2 .0 * 1.2 .8 150
Whiskey Creek 6800 .7 .0 * 1.6 1.2 133
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Basin Index (%) 170* 117
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 .4 1.3 31* .6 1.4 43
Canyon 7870 .6 -M * 1.2 -M *
Evening Star 9200 .5 1.1 45* .8 2.1 38
Fisher Creek 9100 .9 1.4 64* 1.6 1.8 89
Monument Peak 8850 1.2 1.0 120* 2.0 1.6 125
Northeast Entrance 7350 .0 .0 * .9 .9 100
Parker Peak 9400 .3 1.2 25* .5 1.8 28
Sylvan Lake 8420 .3 -M * 1.8 -M *
Thumb Divide 7980 1.0 .0 * 2.1 1.2 175
Two Ocean Plateau 9240 1.5 1.8 83* 1.4 1.6 88
White Mill 8700 1.0 1.0 100* 1.2 1.4 86
Wolverine 7650 .0 .0 * .7 1.2 58
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Basin Index (%) 77* 79
WIND RIVER
Burroughs Creek 8750 .2 -M * 1.9 -M *
Castle Creek 8400 .2 .0 * 1.2 .8 150
Cold Springs 9630 -M .0 * -M .9 *
Deer Park 9700 .8 -M * 2.6 -M *
Hobbs Park 10100 1.4 -M * 2.4 -M *
Kirwin 9550 .9 -M * 1.4 -M *
Little Warm 9370 1.0 .4 250* 1.5 1.0 150
South Pass 9040 .9 -M * 2.5 -M *
St. Lawrence Alt 8620 .4 -M * 1.8 -M *
Togwotee Pass 9580 1.5 -M * 2.2 -M *
Townsend Creek 8700 1.2 -M * 2.2 -M *
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Basin Index (%) 300* 150
BIGHORN BASIN
Bald Mtn. 9380 2.7 -M * 3.3 -M *
Bear Trap Meadow 8200 1.0 -M * 1.9 -M *
Bone Springs Div 9350 1.9 -M * 2.4 -M *
Grave Springs 8550 1.0 -M * 1.8 -M *
Kirwin 9550 .9 -M * 1.4 -M *
Marquette 8760 .8 -M * 1.8 -M *
Middle Powder 7760 .8 -M * 2.1 -M *
Owl Creek 8975 1.1 -M * 1.5 -M *
Powder River Pass 9480 1.4 -M * 1.8 -M *
Shell Creek 9580 2.1 -M * 2.6 -M *
Timber Creek 7950 .7 -M * 1.1 -M *
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Basin Index (%) * *
SHOSHONE RIVER
Blackwater 9780 1.0 -M * 1.3 -M *
Evening Star 9200 .5 1.1 45* .8 2.1 38
Marquette 8760 .8 -M * 1.8 -M *
Sylvan Lake 8420 .3 -M * 1.8 -M *
Sylvan Road 7120 .0 -M * 1.3 -M *
Younts Peak 8350 .4 -M * .7 -M *
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Basin Index (%) 45* 38
POWDER RIVER
Bear Trap Meadow 8200 1.0 -M * 1.9 -M *
Cloud Peak Reservoir 9860 2.0 -M * 3.4 -M *
Grave Springs 8550 1.0 -M * 1.8 -M *
Hansen Sawmill 8360 2.3 -M * 3.0 -M *
Middle Powder 7760 .8 -M * 2.1 -M *
Powder River Pass 9480 1.4 -M * 1.8 -M *
Soldier Park 8720 2.1 -M * 3.0 -M *
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Basin Index (%) * *
TONGUE RIVER
Big Goose 7990 1.1 -M * 2.9 -M *
Bone Springs Div 9350 1.9 -M * 2.4 -M *
Burgess Junction 7880 1.3 -M * 2.2 -M *
Dome Lake 8880 1.4 -M * 2.4 -M *
Little Goose 8870 1.2 -M * 3.1 -M *
Sucker Creek 8880 1.6 -M * 2.3 -M *
Tie Creek 6870 1.2 -M * 2.8 -M *
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Basin Index (%) * *
BELLE FOURCHE
Blind Park 6890 .1 .0 * 2.2 1.1 200
Cole Canyon 5910 1.0 .0 * 2.9 1.0 290
North Rapid Creek 6130 1.3 .0 * 2.0 .9 222
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Basin Index (%) * 237
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * 2.2 1.1 200
North Rapid Creek 6130 1.3 .0 * 2.0 .9 222
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Basin Index (%) * 210
UPPER N. PLATTE
Arapaho Ridge 10960 1.1 1.0 110* 1.6 1.6 100
Blackhall Mtn 9820 1.9 1.1 173* 2.9 2.4 121
Cinnabar Park 9574 1.0 .3 333* 1.8 1.5 120
Columbine 9160 .1 .0 * -M 1.8 *
Divide Peak 8880 -M .2 * -M 1.6 *
Joe Wright 10120 1.4 .3 467* 2.2 2.2 100
Laprele Creek 8375 .6 .0 * 1.4 1.0 140
Med Bow 10500 1.7 -M * 2.2 -M *
Never Summer 10280 1.2 .8 150* 1.6 1.8 89
North French Creek 10130 1.3 .6 217* 2.2 1.8 122
Old Battle 10000 2.0 1.2 167* 3.6 2.0 180
Rawah 9020 1.0 .0 * 1.8 1.6 112
Sage Creek Basin 7850 .1 .0 * .9 1.1 82
Sand Lake 10050 1.6 1.2 133* 2.2 1.6 138
South Brush Creek 8440 .4 .0 * 1.4 .9 156
Tower 10500 2.4 1.0 240* 3.0 2.3 130
Webber Springs 9250 .7 .3 233* 2.6 1.6 162
Whiskey Park 8950 1.8 .0 * 3.1 1.8 172
Willow Creek Pass 9540 .6 .2 300* 1.3 1.1 118
Zirkel 9340 -M .0 * -M 2.2 *
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Basin Index (%) 240* 128
SWEETWATER
Deer Park 9700 .8 -M * 2.6 -M *
Larsen Creek 9000 .1 .0 * 3.1 .8 388
South Pass 9040 .9 -M * 2.5 -M *
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Basin Index (%) * 388
LOWER N. PLATTE
Casper Mtn. 7900 1.4 .0 * 3.3 1.1 300
Laprele Creek 8375 .6 .0 * 1.4 1.0 140
Reno Hill 8400 1.2 .5 240* 2.6 1.2 217
Windy Peak 7900 .6 .0 * 1.4 .8 175
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Basin Index (%) 760* 212
LARAMIE RIVER
Brooklyn Lake 10240 .2 .0 * 1.5 1.0 150
Cinnabar Park 9574 1.0 .3 333* 1.8 1.5 120
Crow Creek 8330 .1 .0 * .8 .8 100
Deadman Hill 10220 .8 1.1 73* 1.3 1.3 100
Rawah 9020 1.0 .0 * 1.8 1.6 112
Roach 9700 1.2 .4 300* 1.9 1.2 158
Windy Peak 7900 .6 .0 * 1.4 .8 175
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Basin Index (%) 272* 128
S. PLATTE
Crow Creek 8330 .1 .0 * .8 .8 100
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Basin Index (%) * 100
LITTLE SNAKE RIVER
Battle Mountain 7440 .2 .0 * 1.7 1.2 142
Divide Peak 8880 -M .2 * -M 1.6 *
Elk River 8700 .1 .0 * 2.5 1.4 179
Elkhead Divide 8780 .0 -M * 2.0 -M *
Little Snake River 8915 .0 .0 * 3.0 2.5 120
Old Battle 10000 2.0 1.2 167* 3.6 2.0 180
Sage Creek Basin 7850 .1 .0 * .9 1.1 82
Sandstone RS 8150 .1 .0 * 1.8 1.1 164
Whiskey Park 8950 1.8 .0 * 3.1 1.8 172
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Basin Index (%) 358* 150
UPPER GREEN RIVER
Big Sandy Opening 9080 .3 .6 50* 2.8 1.0 280
Blind Bull Sum 8650 1.0 .4 250* 1.9 1.0 190
East Rim Divide 7930 .1 .0 * 1.5 .6 250
Elkhart Park G.S. 9400 .3 .1 300* 1.8 1.4 129
Gros Ventre Summit 8750 1.2 .6 200* 1.2 1.0 120
Gunsight Pass 9820 1.0 .2 500* 2.1 1.1 191
Indian Creek 9425 .6 .5 120* 2.1 1.2 175
Kendall R.S. 7740 .0 .0 * 1.9 .8 238
Larsen Creek 9000 .1 .0 * 3.1 .8 388
Loomis Park 8240 .0 .0 * 1.7 .9 189
New Fork Lake 8340 .0 .0 * 1.8 .7 257
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 .0 .0 * 1.8 .7 257
Spring Creek Divide 9000 1.1 .4 275* 2.6 1.1 236
Triple Peak 8500 .2 .2 100* 2.5 1.2 208
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Basin Index (%) 197* 213
LOWER GREEN RIVER
Blacks Fork Jct 8869 .3 -M * 1.1 -M *
Buck Pasture 9632 .5 -M * 2.3 -M *
EF Blacks Fork GS 9360 .2 -M * 1.9 -M *
Hams Fork 7840 .3 .0 * 2.2 .8 275
Henrys Fork 10182 -M -M * 2.0 -M *
Hewinta 9500 .4 .0 * 1.6 1.0 160
Hickerson Park 9122 .8 .0 * 1.1 .7 157
Hole-in-Rock 9168 .3 .0 * 1.8 1.0 180
Indian Creek 9425 .6 .5 120* 2.1 1.2 175
Kelley R.S. 8180 .0 .0 * 2.4 .8 300
Spirit Lk 10235 .5 .0 * 2.2 1.1 200
Steel Creek Park 10158 1.0 .4 250* 2.4 1.0 240
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Basin Index (%) 433* 208
UPPER BEAR RIVER
Bear River RS 8777 .3 -M * 1.6 -M *
Bug Lake 7987 .7 .0 * 2.7 .8 338
Burts Miller Ranch 8000 .2 .0 * .8 .6 133
Chalk Creek #1 9171 .8 .0 * 2.9 1.4 207
Giveout 6930 .1 .0 * 2.7 .8 338
Hayden Fork 9130 .2 .0 * 2.8 1.3 215
Kelley R.S. 8180 .0 .0 * 2.4 .8 300
Lily Lake 9133 .6 .0 * 2.1 1.1 191
Monte Cristo 8932 1.0 .0 * 3.5 1.2 292
Salt River Summit 7640 .0 .0 * 2.6 .8 325
Spring Creek Divide 9000 1.1 .4 275* 2.6 1.1 236
Trial Lake 9992 1.1 .0 * 3.2 1.4 229
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Basin Index (%) 1450* 250
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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.
