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 FRIDAY: OCTOBER 5 , 2018
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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 7060 .1 .0 * .5 .3 167
Black Bear 8170 .3 .0 * -M .6 *
Blind Bull Sum 8650 .0 .0 * 1.4 .3 467
Cottonwood Creek 7670 .1 .0 * 1.5 .4 375
East Rim Divide 7930 .0 .0 * .8 .2 400
Grand Targhee 9260 .3 .8 38* .8 .6 133
Granite Creek 6770 .1 .0 * .9 .3 300
Grassy Lake 7265 .2 .0 * .7 .6 117
Gros Ventre Summit 8750 .1 .0 * .5 .2 250
Gunsight Pass 9820 .1 .0 * .9 .4 225
Lewis Lake Divide 7850 .0 .0 * .9 .5 180
Phillips Bench 8200 .0 .0 * 1.3 .4 325
Salt River Summit 7640 .0 .0 * 1.3 .3 433
Snake River Station 6920 .0 .0 * .7 .4 175
Spring Creek Divide 9000 .2 .0 * 1.4 .3 467
Thumb Divide 7980 .1 .0 * .7 .4 175
Togwotee Pass 9580 .2 .0 * .6 .4 150
Two Ocean Plateau 9240 .5 .1 500* .7 .5 140
Willow Creek 8080 .3 .0 * 2.2 .5 440
Younts Peak 8350 -M .0 * -M .4 *
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Basin Index (%) 289* 254
MADISON-GALLATIN
Black Bear 8170 .3 .0 * -M .6 *
Canyon 7870 .1 .0 * .8 .3 267
Madison Plateau 7750 .5 .0 * 1.1 .5 220
West Yellowstone 6700 .3 .0 * -M .4 *
Whiskey Creek 6800 .1 .0 * .4 .3 133
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Basin Index (%) * 209
YELLOWSTONE
Beartooth Lake 9360 .1 .4 25* .3 .3 100
Burnt Mtn 5880 .5 .0 * .3 .8 38
Canyon 7870 .1 .0 * .8 .3 267
Cole Creek 7850 .3 .4 75* .1 .6 17
Evening Star 9200 .1 .0 * .8 .5 160
Fisher Creek 9100 .3 .0 * -M .5 *
Northeast Entrance 7350 .1 .0 * .7 .3 233
Parker Peak 9400 .2 .3 67* .8 .5 160
Sylvan Lake 8420 .5 .0 * 1.2 .5 240
Thumb Divide 7980 .1 .0 * .7 .4 175
Two Ocean Plateau 9240 .5 .1 500* .7 .5 140
White Mill 8700 .1 .0 * .6 .5 120
Wolverine 7650 .0 .0 * .4 .4 100
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Basin Index (%) 242* 132
WIND RIVER
Burroughs Creek 8750 .0 -M * .7 -M *
Castle Creek 8400 .0 -M * .2 -M *
Cold Springs 9630 .0 .0 * .0 .4 0
Deer Park 9700 .0 .0 * .6 .5 120
Hobbs Park 10100 .1 .0 * .2 .5 40
Kirwin 9550 .0 .0 * .2 .3 67
Little Warm 9370 .2 .0 * .4 .3 133
Owl Creek 8975 .1 .0 * .2 .3 67
South Pass 9040 .1 .0 * .4 .4 100
St. Lawrence Alt 8620 .0 .0 * .2 .4 50
Togwotee Pass 9580 .2 .0 * .6 .4 150
Townsend Creek 8700 .1 .0 * .2 .5 40
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Basin Index (%) * 75
BIGHORN BASIN
Bald Mtn. 9380 .0 .3 0* .4 .4 100
Bear Trap Meadow 8200 .1 .0 * .4 .3 133
Bone Springs Div 9350 .2 .4 50* .6 .5 120
Grave Springs 8550 .1 .0 * -M .5 *
Kirwin 9550 .0 .0 * .2 .3 67
Marquette 8760 .0 -M * .0 -M *
Middle Powder 7760 .0 .0 * .3 .4 75
Owl Creek 8975 .1 .0 * .2 .3 67
Powder River Pass 9480 .0 .0 * 1.1 .4 275
Shell Creek 9580 .0 .6 0* .8 .4 200
Timber Creek 7950 .0 .0 * .0 .4 0
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Basin Index (%) 38* 118
SHOSHONE RIVER
Blackwater 9780 .3 .0 * .9 .5 180
Evening Star 9200 .1 .0 * .8 .5 160
Marquette 8760 .0 -M * .0 -M *
Sylvan Road 7120 .0 .0 * .2 .4 50
Younts Peak 8350 -M .0 * -M .4 *
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Basin Index (%) * 136
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * .4 .3 133
Cloud Peak Reservoir 9860 .1 .0 * .4 .4 100
Grave Springs 8550 .1 .0 * -M .5 *
Hansen Sawmill 8360 .0 .0 * .1 .3 33
Middle Powder 7760 .0 .0 * .3 .4 75
Powder River Pass 9480 .0 .0 * 1.1 .4 275
Soldier Park 8720 .0 -M * .0 -M *
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Basin Index (%) * 128
TONGUE RIVER
Big Goose 7990 .1 .0 * .0 .5 0
Bone Springs Div 9350 .2 .4 50* .6 .5 120
Burgess Junction 7880 .0 .0 * .4 .4 100
Dome Lake 8880 .0 .0 * .4 .5 80
Little Goose 8870 .0 -M * .0 -M *
Sucker Creek 8880 .0 .0 * .4 .4 100
Tie Creek 6870 .0 .0 * .2 .6 33
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Basin Index (%) 75* 69
BELLE FOURCHE
Cole Canyon 5910 .1 .0 * .0 .3 0
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Basin Index (%) * 0
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * .1 .4 25
North Rapid Creek 6130 .0 .0 * .0 .4 0
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Basin Index (%) * 12
UPPER N. PLATTE
Arapaho Ridge 10960 .1 .1 100* .5 .5 100
Blackhall Mtn 9820 .0 -M * 1.4 -M *
Columbine 9160 .1 .0 * .8 .5 160
Divide Peak 8880 .0 .0 * .4 .6 67
Joe Wright 10120 .1 .0 * .4 .4 100
Laprele Creek 8375 .0 .0 * -M .3 *
Med Bow 10500 .2 -M * 1.2 -M *
North French Creek 10130 .1 .0 * .8 .5 160
Never Summer 10280 .1 .0 * .4 -M *
Old Battle 10000 .0 .0 * 1.9 .7 271
Rawah 9020 .2 .0 * .5 .5 100
Sage Creek Basin 7850 .2 .0 * 1.1 .5 220
Sand Lake 10050 .1 .0 * .0 .5 0
South Brush Creek 8440 .3 .0 * .0 .4 0
Tower 10500 .1 .0 * -M .7 *
Webber Springs 9250 .2 .0 * 1.5 .6 250
Willow Creek Pass 9540 .0 .0 * .3 .2 150
Zirkel 9340 .2 .0 * 1.5 .8 188
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Basin Index (%) 1800* 145
SWEETWATER
Deer Park 9700 .0 .0 * .6 .5 120
Larsen Creek 9000 .0 .0 * .8 -M *
South Pass 9040 .1 .0 * .4 .4 100
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Basin Index (%) * 111
LOWER N. PLATTE
Casper Mtn. 7900 .0 .0 * -M .4 *
Laprele Creek 8375 .0 .0 * -M .3 *
Reno Hill 8400 .1 .0 * -M .4 *
Windy Peak 7900 .2 .0 * -M .3 *
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Basin Index (%) * *
LARAMIE RIVER
Brooklyn Lake 10240 .1 .0 * -M .3 *
Cinnabar Park 9574 .0 .0 * .7 .5 140
Crow Creek 8330 .0 .0 * .3 .2 150
Deadman Hill 10220 .2 .0 * .2 .2 100
Rawah 9020 .2 .0 * .5 .5 100
Roach 9700 .1 .0 * .3 .3 100
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Basin Index (%) * 118
S. PLATTE
Black Mountain 8920 .2 -M * .2 -M *
Crow Creek 8330 .0 .0 * .3 .2 150
Deadman Hill 10220 .2 .0 * .2 .2 100
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Basin Index (%) * 125
LITTLE SNAKE RIVER
Battle Mountain 7440 .0 .0 * 1.0 .4 250
Divide Peak 8880 .0 .0 * .4 .6 67
Elk River 8700 .1 .0 * -M .5 *
Little Snake River 8915 .0 .0 * 2.1 .7 300
Old Battle 10000 .0 .0 * 1.9 .7 271
Sage Creek Basin 7850 .2 .0 * 1.1 .5 220
Sandstone RS 8150 .6 .0 * .3 .4 75
Whiskey Park 8950 .1 .0 * 1.5 .5 300
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Basin Index (%) * 218
UPPER GREEN RIVER
Big Sandy Opening 9080 .2 .0 * 1.0 .3 333
Blind Bull Sum 8650 .0 .0 * 1.4 .3 467
East Rim Divide 7930 .0 .0 * .8 .2 400
Elkhart Park G.S. 9400 .2 .0 * .9 .3 300
Gros Ventre Summit 8750 .1 .0 * .5 .2 250
Gunsight Pass 9820 .1 .0 * .9 .4 225
Kendall R.S. 7740 .1 .0 * 1.0 .2 500
Loomis Park 8240 -M .0 * -M .2 *
New Fork Lake 8340 .0 .0 * .3 .2 150
Pocket Creek 9360 .1 -M * 1.1 -M *
Snyder Basin 8060 .0 .0 * 1.1 .2 550
Spring Creek Divide 9000 .2 .0 * 1.4 .3 467
Triple Peak 8500 -M .0 * 1.2 .3 400
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Basin Index (%) * 362
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 1.0 -M *
Buck Pasture 9632 .1 -M * 1.4 -M *
EF Blacks Fork GS 9360 .1 -M * .6 -M *
Hams Fork 7840 .0 .0 * .8 .2 400
Hewinta 9500 .1 .0 * .8 .3 267
Hickerson Park 9122 .4 .0 * .7 .3 233
Hole-in-Rock 9168 .0 .0 * .3 .4 75
Indian Creek 9425 .2 .0 * .9 .3 300
Kelley R.S. 8180 .5 .0 * 1.2 .3 400
Spirit Lk 10235 .0 -M * 1.6 -M *
Steel Creek Park 10158 .0 .0 * .6 .4 150
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Basin Index (%) * 241
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 1.2 -M *
Bug Lake 7987 .0 .0 * 1.6 .4 400
Burts Miller Ranch 8000 .2 -M * .7 -M *
Chalk Creek #1 9171 .1 .0 * 2.9 .5 580
Hayden Fork 9130 .0 .0 * 2.1 .4 525
Kelley R.S. 8180 .5 .0 * 1.2 .3 400
Lily Lake 9133 .0 .0 * 1.0 .4 250
Monte Cristo 8932 .7 .0 * 1.3 .4 325
Salt River Summit 7640 .0 .0 * 1.3 .3 433
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Basin Index (%) * 422
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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.
