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 SATURDAY: OCTOBER 6 , 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 .0 .0 * .5 .4 125
Black Bear 8170 .3 .0 * 1.7 .7 243
Blind Bull Sum 8650 .0 .0 * 1.4 .4 350
Cottonwood Creek 7670 .0 .0 * 1.5 .5 300
East Rim Divide 7930 .0 .0 * .7 .3 233
Grand Targhee 9260 .4 .9 44* 1.2 1.0 120
Granite Creek 6770 .0 .0 * 1.0 .4 250
Grassy Lake 7265 .1 .0 * .8 .7 114
Gros Ventre Summit 8750 .0 .0 * .6 .3 200
Gunsight Pass 9820 .0 .0 * 1.0 .5 200
Lewis Lake Divide 7850 .0 .0 * 1.1 .6 183
Phillips Bench 8200 .0 .0 * 1.4 .4 350
Salt River Summit 7640 .0 .0 * 1.3 .3 433
Snake River Station 6920 .0 .0 * .9 .5 180
Spring Creek Divide 9000 .0 .0 * 1.2 .3 400
Thumb Divide 7980 .0 .0 * .9 .5 180
Togwotee Pass 9580 .1 .0 * .7 .5 140
Two Ocean Plateau 9240 .3 .2 150* .9 .5 180
Willow Creek 8080 .1 .0 * 2.5 .6 417
Younts Peak 8350 -M .0 * -M .5 *
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Basin Index (%) 118* 227
MADISON-GALLATIN
Black Bear 8170 .3 .0 * 1.7 .7 243
Canyon 7870 .0 .0 * .8 .4 200
Madison Plateau 7750 .2 .0 * 1.2 .6 200
West Yellowstone 6700 .1 .0 * 1.0 .4 250
Whiskey Creek 6800 .0 .0 * .2 .4 50
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Basin Index (%) * 196
YELLOWSTONE
Beartooth Lake 9360 .0 .5 0* .3 .4 75
Burnt Mtn 5880 .0 .0 * .3 1.0 30
Canyon 7870 .0 .0 * .8 .4 200
Cole Creek 7850 .1 .5 20* .1 .8 12
Evening Star 9200 .0 .0 * .8 .6 133
Fisher Creek 9100 .1 .0 * 1.4 .6 233
Northeast Entrance 7350 .1 .0 * .8 .4 200
Parker Peak 9400 .3 .4 75* 1.1 .6 183
Sylvan Lake 8420 .3 .0 * 1.3 .6 217
Thumb Divide 7980 .0 .0 * .9 .5 180
Two Ocean Plateau 9240 .3 .2 150* .9 .5 180
White Mill 8700 .0 .0 * .6 .5 120
Wolverine 7650 .0 .0 * .3 .4 75
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Basin Index (%) 75* 132
WIND RIVER
Burroughs Creek 8750 .0 -M * .4 -M *
Castle Creek 8400 .0 -M * .1 -M *
Cold Springs 9630 .0 .0 * .0 .4 0
Deer Park 9700 .0 .0 * .6 .6 100
Hobbs Park 10100 .0 .0 * .2 .5 40
Kirwin 9550 .0 .0 * -M .4 *
Little Warm 9370 .0 .0 * .3 .3 100
Owl Creek 8975 .0 .0 * .2 .3 67
South Pass 9040 .0 .0 * .5 .5 100
St. Lawrence Alt 8620 .0 .0 * .2 .5 40
Togwotee Pass 9580 .1 .0 * .7 .5 140
Townsend Creek 8700 .0 .0 * .2 .5 40
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Basin Index (%) * 71
BIGHORN BASIN
Bald Mtn. 9380 .3 .5 60* .0 .5 0
Bear Trap Meadow 8200 .0 .0 * -M .4 *
Bone Springs Div 9350 .3 .5 60* .3 .6 50
Grave Springs 8550 .1 .0 * -M .6 *
Kirwin 9550 .0 .0 * -M .4 *
Marquette 8760 .0 -M * .2 -M *
Middle Powder 7760 .1 .0 * -M .5 *
Owl Creek 8975 .0 .0 * .2 .3 67
Powder River Pass 9480 .1 .0 * .0 .5 0
Shell Creek 9580 .2 .7 29* .2 .5 40
Timber Creek 7950 .0 .0 * .1 .5 20
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Basin Index (%) 65* 28
SHOSHONE RIVER
Blackwater 9780 .2 .2 100* 1.0 .6 167
Evening Star 9200 .0 .0 * .8 .6 133
Marquette 8760 .0 -M * .2 -M *
Sylvan Road 7120 .0 .0 * .1 .5 20
Younts Peak 8350 -M .0 * -M .5 *
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Basin Index (%) 100* 112
POWDER RIVER
Bear Trap Meadow 8200 .0 .0 * -M .4 *
Cloud Peak Reservoir 9860 .0 .0 * .0 .5 0
Grave Springs 8550 .1 .0 * -M .6 *
Hansen Sawmill 8360 .0 .0 * .1 .4 25
Middle Powder 7760 .1 .0 * -M .5 *
Powder River Pass 9480 .1 .0 * .0 .5 0
Soldier Park 8720 .0 -M * .0 -M *
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Basin Index (%) * 7*
TONGUE RIVER
Big Goose 7990 .0 .0 * .1 .6 17
Bone Springs Div 9350 .3 .5 60* .3 .6 50
Burgess Junction 7880 .1 .1 100* .2 .4 50
Dome Lake 8880 .0 .0 * -M .6 *
Little Goose 8870 .1 -M * .2 -M *
Sucker Creek 8880 .2 .0 * .0 .5 0
Tie Creek 6870 .0 .0 * .2 .7 29
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Basin Index (%) 100* 29
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * .0 .4 0
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Basin Index (%) * 0
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * .1 .5 20
North Rapid Creek 6130 .0 .0 * .0 .5 0
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Basin Index (%) * 10
UPPER N. PLATTE
Arapaho Ridge 10960 .4 .1 400* 1.0 .6 167
Blackhall Mtn 9820 .0 -M * 1.5 -M *
Columbine 9160 .1 .0 * 1.1 .5 220
Divide Peak 8880 .2 .0 * 1.2 .6 200
Joe Wright 10120 .5 .0 * 1.4 .5 280
Laprele Creek 8375 .1 .0 * .0 .4 0
Med Bow 10500 .0 -M * 1.4 -M *
North French Creek 10130 .1 .0 * 1.1 .6 183
Never Summer 10280 .4 .0 * 1.0 -M *
Old Battle 10000 .1 .0 * 1.9 .8 238
Rawah 9020 .3 .0 * .7 .5 140
Sage Creek Basin 7850 .1 .0 * 1.4 .5 280
Sand Lake 10050 .0 .0 * .2 .6 33
South Brush Creek 8440 .0 .0 * .1 .5 20
Tower 10500 .5 .0 * .0 .8 0
Webber Springs 9250 .1 .0 * 1.6 .6 267
Willow Creek Pass 9540 .1 .0 * .8 .2 400
Zirkel 9340 .0 .0 * 1.7 1.0 170
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Basin Index (%) 3000* 163
SWEETWATER
Deer Park 9700 .0 .0 * .6 .6 100
Larsen Creek 9000 .0 .0 * 1.1 -M *
South Pass 9040 .0 .0 * .5 .5 100
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Basin Index (%) * 100
LOWER N. PLATTE
Casper Mtn. 7900 .2 .0 * -M .4 *
Laprele Creek 8375 .1 .0 * .0 .4 0
Reno Hill 8400 .2 .0 * -M .4 *
Windy Peak 7900 .2 .0 * -M .4 *
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Basin Index (%) * 0*
LARAMIE RIVER
Brooklyn Lake 10240 .0 .0 * .1 .4 25
Cinnabar Park 9574 .0 .0 * .8 .5 160
Crow Creek 8330 .0 .0 * .4 .2 200
Deadman Hill 10220 .1 .0 * .3 .3 100
Rawah 9020 .3 .0 * .7 .5 140
Roach 9700 .1 .0 * .5 .4 125
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Basin Index (%) * 122
S. PLATTE
Black Mountain 8920 .1 -M * .2 -M *
Crow Creek 8330 .0 .0 * .4 .2 200
Deadman Hill 10220 .1 .0 * .3 .3 100
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Basin Index (%) * 140
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 .0 * 1.3 .4 325
Divide Peak 8880 .2 .0 * 1.2 .6 200
Elk River 8700 .1 .0 * .2 .5 40
Little Snake River 8915 -M .0 * 2.3 .8 288
Old Battle 10000 .1 .0 * 1.9 .8 238
Sage Creek Basin 7850 .1 .0 * 1.4 .5 280
Sandstone RS 8150 .1 .0 * .7 .4 175
Whiskey Park 8950 .1 .0 * 1.7 .6 283
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Basin Index (%) * 233
UPPER GREEN RIVER
Big Sandy Opening 9080 .0 .0 * 1.2 .3 400
Blind Bull Sum 8650 .0 .0 * 1.4 .4 350
East Rim Divide 7930 .0 .0 * .7 .3 233
Elkhart Park G.S. 9400 .0 .0 * .9 .3 300
Gros Ventre Summit 8750 .0 .0 * .6 .3 200
Gunsight Pass 9820 .0 .0 * 1.0 .5 200
Kendall R.S. 7740 .0 .0 * .9 .3 300
Loomis Park 8240 -M .0 * -M .3 *
New Fork Lake 8340 .0 .0 * .3 .3 100
Pocket Creek 9360 .0 -M * 1.2 -M *
Snyder Basin 8060 .0 .0 * .9 .2 450
Spring Creek Divide 9000 .0 .0 * 1.2 .3 400
Triple Peak 8500 -M .0 * 1.3 .4 325
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Basin Index (%) * 289
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 1.3 -M *
Buck Pasture 9632 .0 -M * 1.9 -M *
EF Blacks Fork GS 9360 .0 -M * .9 -M *
Hams Fork 7840 .0 .0 * 1.0 .3 333
Hewinta 9500 .0 .0 * 1.0 .4 250
Hickerson Park 9122 .3 .0 * .7 .4 175
Hole-in-Rock 9168 .0 .0 * .4 .4 100
Indian Creek 9425 .0 .0 * .8 .3 267
Kelley R.S. 8180 .3 .0 * 1.2 .3 400
Spirit Lk 10235 .0 -M * 1.8 -M *
Steel Creek Park 10158 -M .0 * .9 .5 180
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Basin Index (%) * 231
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 1.6 -M *
Bug Lake 7987 .0 .0 * 1.7 .4 425
Burts Miller Ranch 8000 .1 -M * .9 -M *
Chalk Creek #1 9171 .1 .0 * 3.5 .6 583
Hayden Fork 9130 .0 .0 * 2.5 .5 500
Kelley R.S. 8180 .3 .0 * 1.2 .3 400
Lily Lake 9133 .0 .0 * 1.5 .5 300
Monte Cristo 8932 .4 .0 * 1.6 .5 320
Salt River Summit 7640 .0 .0 * 1.3 .3 433
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Basin Index (%) * 429
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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.
