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 THURSDAY: OCTOBER 5 , 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 .3 167
Black Bear 8170 2.1 .0 * .7 .6 117
Blind Bull Sum 8650 1.6 .0 * .3 .3 100
Cottonwood Creek 7670 .1 .0 * .1 .4 25
East Rim Divide 7930 .0 .0 * .1 .2 50
Grand Targhee 9260 4.6 .8 575* 1.2 .6 200
Granite Creek 6770 .1 .0 * .6 .3 200
Grassy Lake 7265 .2 .0 * .5 .6 83
Gros Ventre Summit 8750 .7 .0 * .7 .2 350
Gunsight Pass 9820 1.5 .0 * .5 .4 125
Lewis Lake Divide 7850 .0 .0 * .6 .5 120
Phillips Bench 8200 .0 .0 * .7 .4 175
Salt River Summit 7760 .0 .0 * -M .3 *
Snake River Station 6920 .0 .0 * .5 .4 125
Spring Creek Divide 9000 1.0 .0 * .3 .3 100
Thumb Divide 7980 .0 .0 * .4 .4 100
Togwotee Pass 9580 -M .0 * 1.5 .4 375
Two Ocean Plateau 9240 4.7 .1 4700* .7 .5 140
Willow Creek 8380 .0 .0 * .4 .5 80
Younts Peak 8350 .3 .0 * .3 .4 75
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Basin Index (%) 1878* 138
MADISON-GALLATIN
Black Bear 8170 2.1 .0 * .7 .6 117
Canyon 7870 .2 .0 * .1 .3 33
Madison Plateau 7750 .5 .0 * .5 .5 100
West Yellowstone 6700 .3 .0 * .2 .4 50
Whiskey Creek 6800 .0 .0 * .0 .3 0
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Basin Index (%) * 71
YELLOWSTONE
Beartooth Lake 9360 1.7 .4 425* .4 .3 133
Burnt Mtn 5880 .1 .0 * -M .8 *
Canyon 7870 .2 .0 * .1 .3 33
Cole Creek 7850 1.2 .4 300* -M .6 *
Evening Star 9200 2.4 .0 * .6 .5 120
Fisher Creek 9100 3.3 .0 * .7 .5 140
Northeast Entrance 7350 .0 .0 * .2 .3 67
Parker Peak 9400 2.6 .3 867* .3 .5 60
Sylvan Lake 8420 2.6 .0 * .7 .5 140
Thumb Divide 7980 .0 .0 * .4 .4 100
Two Ocean Plateau 9240 4.7 .1 4700* .7 .5 140
White Mill 8700 3.4 .0 * .3 .5 60
Wolverine 7650 .0 .0 * .1 .4 25
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Basin Index (%) 1850* 96
WIND RIVER
Burroughs Creek 8750 .9 -M * .3 -M *
Castle Creek 8400 .3 -M * .6 -M *
Cold Springs 9630 .8 .0 * .2 .4 50
Deer Park 9700 .7 .0 * .5 .5 100
Hobbs Park 10100 1.4 .0 * .6 .5 120
Kirwin 9550 2.1 .0 * .6 .3 200
Little Warm 9370 1.5 .0 * .3 .3 100
Owl Creek 8975 .5 .0 * .9 .3 300
South Pass 9040 .1 .0 * .2 .4 50
St. Lawrence Alt 8620 .5 .0 * .7 .4 175
Togwotee Pass 9580 -M .0 * 1.5 .4 375
Townsend Creek 8700 .2 .0 * .5 .5 100
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Basin Index (%) * 150
BIGHORN BASIN
Bald Mtn. 9380 1.6 .3 533* .6 .4 150
Bear Trap Meadow 8200 .5 .0 * 1.0 .3 333
Bone Springs Div 9350 .7 .4 175* .5 .5 100
Grave Springs 8550 .1 .0 * .4 .5 80
Kirwin 9550 2.1 .0 * .6 .3 200
Marquette 8760 .7 -M * .9 -M *
Middle Powder 7760 .1 .0 * .3 .4 75
Owl Creek 8975 .5 .0 * .9 .3 300
Powder River Pass 9480 1.3 .0 * 1.1 .4 275
Shell Creek 9580 3.1 .6 517* .9 .4 225
Timber Creek 7950 .7 .0 * .8 .4 200
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Basin Index (%) 823* 182
SHOSHONE RIVER
Blackwater 9780 3.0 .0 * .6 .5 120
Evening Star 9200 2.4 .0 * .6 .5 120
Marquette 8760 .7 -M * .9 -M *
Sylvan Road 7120 .0 .0 * .3 .4 75
Younts Peak 8350 .3 .0 * .3 .4 75
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Basin Index (%) * 100
POWDER RIVER
Bear Trap Meadow 8200 .5 .0 * 1.0 .3 333
Cloud Peak Reservoir 9860 .8 .0 * 1.2 .4 300
Grave Springs 8550 .1 .0 * .4 .5 80
Hansen Sawmill 8360 .1 .0 * .7 .3 233
Middle Powder 7760 .1 .0 * .3 .4 75
Powder River Pass 9480 1.3 .0 * 1.1 .4 275
Soldier Park 8720 .0 -M * .9 -M *
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Basin Index (%) * 204
TONGUE RIVER
Big Goose 7990 .1 .0 * .1 .5 20
Bone Springs Div 9350 .7 .4 175* .5 .5 100
Burgess Junction 7880 .1 .0 * .2 .4 50
Dome Lake 8880 .2 .0 * .6 .5 120
Little Goose 8870 .0 -M * .4 -M *
Sucker Creek 8880 .0 .0 * .5 .4 125
Tie Creek 6870 .0 .0 * .2 .6 33
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Basin Index (%) 275* 72
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * .4 .3 133
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Basin Index (%) * 133
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * .7 .4 175
North Rapid Creek 6130 .0 .0 * .4 .4 100
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Basin Index (%) * 138
UPPER N. PLATTE
Arapaho Ridge 10960 2.1 .1 2100* 2.1 .5 420
Blackhall Mtn 9820 1.9 -M * 1.8 -M *
Columbine 9160 .5 .0 * 1.9 .5 380
Divide Peak 8880 .0 .0 * .7 .6 117
Joe Wright 10120 1.9 .0 * 2.5 .4 625
Laprele Creek 8375 .0 .0 * .1 .3 33
Med Bow 10500 -M -M * 1.0 -M *
North French Creek 10130 1.2 .0 * 1.1 .5 220
Never Summer 10280 1.9 .0 * 2.0 -M *
Old Battle 10000 1.4 .0 * 1.2 .7 171
Rawah 9020 .9 .0 * 1.6 .5 320
Sage Creek Basin 7850 -M .0 * .2 .5 40
Sand Lake 10050 .8 .0 * .9 .5 180
South Brush Creek 8440 .1 .0 * .7 .4 175
Tower 10500 -M .0 * 2.4 .7 343
Webber Springs 9250 .3 .0 * .8 .6 133
Willow Creek Pass 9540 1.6 .0 * 1.7 .2 850
Zirkel 9340 .3 .0 * 1.3 .8 162
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Basin Index (%) 13000* 249
SWEETWATER
Deer Park 9700 .7 .0 * .5 .5 100
Larsen Creek 9000 .0 .0 * .6 -M *
South Pass 9040 .1 .0 * .2 .4 50
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Basin Index (%) * 78
LOWER N. PLATTE
Casper Mtn. 7900 .3 .0 * .1 .4 25
Laprele Creek 8375 .0 .0 * .1 .3 33
Reno Hill 8400 .1 .0 * .2 .4 50
Windy Peak 7900 .1 .0 * .3 .3 100
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Basin Index (%) * 50
LARAMIE RIVER
Brooklyn Lake 10240 .1 .0 * .7 .3 233
Cinnabar Park 9574 .3 .0 * .9 .5 180
Crow Creek 8330 .1 .0 * .7 .2 350
Deadman Hill 10220 1.5 .0 * 1.6 .2 800
Rawah 9020 .9 .0 * 1.6 .5 320
Roach 9700 1.4 .0 * 1.7 .3 567
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Basin Index (%) * 360
S. PLATTE
Black Mountain 8920 .7 -M * 1.1 -M *
Crow Creek 8330 .1 .0 * .7 .2 350
Deadman Hill 10220 1.5 .0 * 1.6 .2 800
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Basin Index (%) * 575
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * .7 .4 175
Divide Peak 8880 .0 .0 * .7 .6 117
Elk River 8700 1.1 .0 * 2.0 .5 400
Little Snake River 8915 .1 .0 * 3.1 .7 443
Old Battle 10000 1.4 .0 * 1.2 .7 171
Sage Creek Basin 7850 -M .0 * .2 .5 40
Sandstone RS 8150 .2 .0 * .8 .4 200
Whiskey Park 8950 -M .0 * 1.5 .5 300
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Basin Index (%) * 237
UPPER GREEN RIVER
Big Sandy Opening 9080 .6 .0 * .6 .3 200
Blind Bull Sum 8650 1.6 .0 * .3 .3 100
East Rim Divide 7930 .0 .0 * .1 .2 50
Elkhart Park G.S. 9400 .5 .0 * .5 .3 167
Gros Ventre Summit 8750 .7 .0 * .7 .2 350
Gunsight Pass 9820 1.5 .0 * .5 .4 125
Kendall R.S. 7740 .2 .0 * .0 .2 0
Loomis Park 8240 .1 .0 * .2 .2 100
New Fork Lake 8340 .0 .0 * -M .2 *
Pocket Creek 9360 .8 -M * .5 -M *
Snider Basin 8060 .0 .0 * .0 .2 0
Spring Creek Divide 9000 1.0 .0 * .3 .3 100
Triple Peak 8500 .1 .0 * .4 .3 133
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Basin Index (%) * 124
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * .3 -M *
Buck Pasture 9632 .0 -M * .4 -M *
EF Blacks Fork GS 9360 .0 -M * .3 -M *
Hams Fork 7840 .0 .0 * .1 .2 50
Hewinta 9500 .0 .0 * .3 .3 100
Hickerson Park 9122 .4 .0 * .1 .3 33
Hole-in-Rock 9168 .0 .0 * .1 .4 25
Indian Creek 9425 .7 .0 * .2 .3 67
Kelley R.S. 8180 .2 .0 * .1 .3 33
Spirit Lk 10235 .0 -M * .3 -M *
Steel Creek Park 10158 1.3 .0 * .3 .4 75
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Basin Index (%) * 55
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * .3 -M *
Bug Lake 7987 .8 .0 * .2 .4 50
Burts Miller Ranch 8000 .0 -M * .2 -M *
Chalk Creek #1 9171 .4 .0 * .5 .5 100
Hayden Fork 9130 .1 .0 * .3 .4 75
Kelley R.S. 8180 .2 .0 * .1 .3 33
Lily Lake 9133 .0 .0 * .2 .4 50
Monte Cristo 8932 .4 .0 * .4 .4 100
Salt River Summit 7760 .0 .0 * -M .3 *
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Basin Index (%) * 71
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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.