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 WEDNESDAY: OCTOBER 4 , 2017
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
Base Camp 7030 .0 .0 * .5 .2 250
Black Bear 8170 1.4 .0 * .2 .4 50
Blind Bull Sum 8650 1.4 .0 * .2 .3 67
Cottonwood Creek 7670 .1 .0 * .0 .3 0
East Rim Divide 7930 .0 .0 * .0 .1 0
Grand Targhee 9260 4.3 .8 538* 1.0 .4 250
Granite Creek 6770 .1 .0 * .4 .2 200
Grassy Lake 7265 .2 .0 * .2 .5 40
Gros Ventre Summit 8750 .7 .0 * .6 .1 600
Gunsight Pass 9820 1.4 .0 * .4 .2 200
Lewis Lake Divide 7850 .0 .0 * .1 .4 25
Phillips Bench 8200 .0 .0 * .6 .3 200
Salt River Summit 7760 .2 .0 * -M .2 *
Snake River Station 6920 .0 .0 * .2 .3 67
Spring Creek Divide 9000 1.0 .0 * .2 .2 100
Thumb Divide 7980 .0 .0 * .2 .3 67
Togwotee Pass 9580 -M .0 * 1.4 .2 700
Two Ocean Plateau 9240 4.4 .0 * .6 .3 200
Willow Creek 8380 .1 .0 * .4 .3 133
Younts Peak 8350 .0 .0 * .1 .3 33
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Basin Index (%) 1912* 138
MADISON-GALLATIN
Black Bear 8170 1.4 .0 * .2 .4 50
Canyon 7870 .0 .0 * .1 .2 50
Madison Plateau 7750 .3 .0 * .2 .4 50
West Yellowstone 6700 .0 .0 * .1 .3 33
Whiskey Creek 6800 .1 .0 * .1 .3 33
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Basin Index (%) * 44
YELLOWSTONE
Beartooth Lake 9360 1.5 .3 500* .2 .3 67
Burnt Mtn 5880 .0 .0 * .0 .4 0
Canyon 7870 .0 .0 * .1 .2 50
Cole Creek 7850 1.2 .2 600* .1 .4 25
Evening Star 9200 2.2 .0 * .1 .4 25
Fisher Creek 9100 3.3 .0 * .2 .4 50
Northeast Entrance 7350 .0 .0 * .0 .2 0
Parker Peak 9400 2.6 .2 1300* .1 .4 25
Sylvan Lake 8420 2.6 .0 * .5 .4 125
Thumb Divide 7980 .0 .0 * .2 .3 67
Two Ocean Plateau 9240 4.4 .0 * .6 .3 200
White Mill 8700 3.4 .0 * .1 .4 25
Wolverine 7650 .0 .0 * .0 .3 0
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Basin Index (%) 3029* 50
WIND RIVER
Burroughs Creek 8750 1.0 -M * .6 -M *
Castle Creek 8400 .4 -M * .6 -M *
Cold Springs 9630 .7 .0 * .2 .3 67
Deer Park 9700 .7 .0 * .3 .2 150
Hobbs Park 10100 1.2 .0 * .4 .3 133
Kirwin 9550 2.1 .0 * .6 .2 300
Little Warm 9370 1.4 .0 * .2 .2 100
Owl Creek 8975 .5 .0 * .8 .2 400
South Pass 9040 .2 .0 * .1 .2 50
St. Lawrence Alt 8620 .5 .0 * .7 .3 233
Togwotee Pass 9580 -M .0 * 1.4 .2 700
Townsend Creek 8700 .0 .0 * .3 .3 100
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Basin Index (%) * 208
BIGHORN BASIN
Bald Mtn. 9380 1.7 .0 * .5 .3 167
Bear Trap Meadow 8200 .5 .0 * .9 .2 450
Bone Springs Div 9350 .7 .3 233* .6 .3 200
Grave Springs 8550 .2 .0 * .3 .3 100
Kirwin 9550 2.1 .0 * .6 .2 300
Marquette 8760 .6 -M * .9 -M *
Middle Powder 7760 .3 .0 * .2 .3 67
Owl Creek 8975 .5 .0 * .8 .2 400
Powder River Pass 9480 1.3 .0 * 1.0 .3 333
Shell Creek 9580 3.0 .5 600* .7 .3 233
Timber Creek 7950 .6 .0 * .9 .3 300
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Basin Index (%) 1362* 241
SHOSHONE RIVER
Blackwater 9780 2.8 .0 * .3 .4 75
Evening Star 9200 2.2 .0 * .1 .4 25
Marquette 8760 .6 -M * .9 -M *
Sylvan Road 7120 .0 .0 * .2 .3 67
Younts Peak 8350 .0 .0 * .1 .3 33
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Basin Index (%) * 50
POWDER RIVER
Bear Trap Meadow 8200 .5 .0 * .9 .2 450
Cloud Peak Reservoir 9860 .8 .0 * 1.1 .3 367
Grave Springs 8550 .2 .0 * .3 .3 100
Hansen Sawmill 8360 .4 .0 * .6 .2 300
Middle Powder 7760 .3 .0 * .2 .3 67
Powder River Pass 9480 1.3 .0 * 1.0 .3 333
Soldier Park 8720 .3 -M * .7 -M *
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Basin Index (%) * 256
TONGUE RIVER
Big Goose 7990 .0 .0 * .1 .2 50
Bone Springs Div 9350 .7 .3 233* .6 .3 200
Burgess Junction 7880 .1 .0 * .3 .3 100
Dome Lake 8880 .2 .0 * .4 .4 100
Little Goose 8870 .1 -M * .3 -M *
Sucker Creek 8880 .1 .0 * .1 .3 33
Tie Creek 6870 .0 .0 * .2 .3 67
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Basin Index (%) 367* 94
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * .4 .1 400
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Basin Index (%) * 400
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * .6 .2 300
North Rapid Creek 6130 .0 .0 * .3 .2 150
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Basin Index (%) * 225
UPPER N. PLATTE
Arapaho Ridge 10960 2.3 .1 2300* 2.1 .4 525
Blackhall Mtn 9820 2.2 -M * 1.8 -M *
Columbine 9160 1.0 .0 * 1.7 .3 567
Divide Peak 8880 .4 .0 * .7 .4 175
Joe Wright 10120 2.3 .0 * 2.5 .3 833
Laprele Creek 8375 .1 .0 * .1 .2 50
Med Bow 10500 -M -M * 1.0 -M *
North French Creek 10130 1.5 .0 * 1.2 .3 400
Never Summer 10280 2.0 .0 * -M -M *
Old Battle 10000 1.5 .0 * 1.1 .5 220
Rawah 9020 1.3 .0 * 1.6 .3 533
Sage Creek Basin 7850 -M .0 * .3 .3 100
Sand Lake 10050 .7 .0 * .8 .3 267
South Brush Creek 8440 .4 .0 * .7 .3 233
Tower 10500 -M .0 * 2.4 .4 600
Webber Springs 9250 .6 .0 * .8 .4 200
Willow Creek Pass 9540 1.7 .0 * 1.7 .1 1700
Zirkel 9340 -M .0 * 1.2 .5 240
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Basin Index (%) 15800* 378
SWEETWATER
Deer Park 9700 .7 .0 * .3 .2 150
Larsen Creek 9000 .4 .0 * .6 -M *
South Pass 9040 .2 .0 * .1 .2 50
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Basin Index (%) * 100
LOWER N. PLATTE
Casper Mtn. 7900 .3 .0 * -M .2 *
Laprele Creek 8375 .1 .0 * .1 .2 50
Reno Hill 8400 .2 .0 * .2 .2 100
Windy Peak 7900 .2 .0 * .1 .2 50
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Basin Index (%) * 67
LARAMIE RIVER
Brooklyn Lake 10240 .6 .0 * .7 .2 350
Cinnabar Park 9574 .5 .0 * .9 .2 450
Crow Creek 8330 .4 .0 * .6 .2 300
Deadman Hill 10220 1.7 .0 * 1.6 .1 1600
Rawah 9020 1.3 .0 * 1.6 .3 533
Roach 9700 1.6 .0 * 1.7 .2 850
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Basin Index (%) * 592
S. PLATTE
Black Mountain 8920 .8 -M * 1.1 -M *
Crow Creek 8330 .4 .0 * .6 .2 300
Deadman Hill 10220 1.7 .0 * 1.6 .1 1600
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Basin Index (%) * 733
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * .6 .3 200
Divide Peak 8880 .4 .0 * .7 .4 175
Elk River 8700 -M .0 * 2.0 .3 667
Little Snake River 8915 .8 .0 * 3.0 .4 750
Old Battle 10000 1.5 .0 * 1.1 .5 220
Sage Creek Basin 7850 -M .0 * .3 .3 100
Sandstone RS 8150 .5 .0 * .8 .3 267
Whiskey Park 8950 -M .0 * 1.5 .4 375
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Basin Index (%) * 345
UPPER GREEN RIVER
Big Sandy Opening 9080 .6 .0 * .6 .2 300
Blind Bull Sum 8650 1.4 .0 * .2 .3 67
East Rim Divide 7930 .0 .0 * .0 .1 0
Elkhart Park G.S. 9400 .5 .0 * .5 .2 250
Gros Ventre Summit 8750 .7 .0 * .6 .1 600
Gunsight Pass 9820 1.4 .0 * .4 .2 200
Kendall R.S. 7740 .2 .0 * -M .1 *
Loomis Park 8240 .1 .0 * .2 .2 100
New Fork Lake 8340 .0 .0 * -M .1 *
Pocket Creek 9360 .8 -M * .5 -M *
Snider Basin 8060 .0 .0 * .1 .1 100
Spring Creek Divide 9000 1.0 .0 * .2 .2 100
Triple Peak 8500 .0 .0 * .4 .2 200
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Basin Index (%) * 178
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * .2 -M *
Buck Pasture 9632 .2 -M * .3 -M *
EF Blacks Fork GS 9360 .0 -M * .1 -M *
Hams Fork 7840 -M .0 * -M .2 *
Hewinta 9500 .0 .0 * .3 .2 150
Hickerson Park 9122 .3 .0 * .2 .3 67
Hole-in-Rock 9168 .0 .0 * .2 .3 67
Indian Creek 9425 .7 .0 * .1 .2 50
Kelley R.S. 8180 .3 .0 * .2 .2 100
Spirit Lk 10235 .3 -M * .3 -M *
Steel Creek Park 10158 1.1 .0 * .3 .2 150
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Basin Index (%) * 93
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .3 -M *
Bug Lake 7987 .9 .0 * .2 .3 67
Burts Miller Ranch 8000 .0 -M * .2 -M *
Chalk Creek #1 9171 .6 .0 * .4 .3 133
Hayden Fork 9130 .2 .0 * .4 .3 133
Kelley R.S. 8180 .3 .0 * .2 .2 100
Lily Lake 9133 .0 .0 * .2 .3 67
Monte Cristo 8932 .4 .0 * .5 .3 167
Salt River Summit 7760 .2 .0 * -M .2 *
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Basin Index (%) * 112
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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.
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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.