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 10 , 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 * .6 .6 100
Black Bear 8170 .4 .3 133* 2.1 1.1 191
Blind Bull Sum 8650 .0 .0 * 1.6 .6 267
Cottonwood Creek 7670 .1 .0 * 1.5 .8 188
East Rim Divide 7930 .0 .0 * .9 .4 225
Grand Targhee 9260 .5 1.2 42* 1.4 2.0 70
Granite Creek 6770 .1 .0 * 1.2 .5 240
Grassy Lake 7265 .1 .0 * 1.0 1.0 100
Gros Ventre Summit 8750 .1 .0 * .6 .5 120
Gunsight Pass 9820 .0 .0 * 1.1 .7 157
Lewis Lake Divide 7850 .0 .0 * 1.2 .9 133
Phillips Bench 8200 .0 .0 * 1.7 .6 283
Salt River Summit 7640 .0 .0 * 1.6 .5 320
Snake River Station 6920 .0 .0 * 1.0 .8 125
Spring Creek Divide 9000 .1 .0 * 1.5 .5 300
Thumb Divide 7980 .0 .0 * 1.1 .7 157
Togwotee Pass 9580 .3 .4 75* .9 .7 129
Two Ocean Plateau 9240 .2 .6 33* 1.0 .9 111
Willow Creek 8080 .1 .0 * 2.6 1.1 236
Younts Peak 8350 -M .2 * -M .7 *
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Basin Index (%) 80* 165
MADISON-GALLATIN
Black Bear 8170 .4 .3 133* 2.1 1.1 191
Canyon 7870 .1 .0 * 1.1 .6 183
Madison Plateau 7750 .1 .0 * 1.5 .8 188
West Yellowstone 6700 .1 .0 * 1.1 .6 183
Whiskey Creek 6800 .0 .0 * .4 .7 57
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Basin Index (%) 233* 163
YELLOWSTONE
Beartooth Lake 9360 .2 .8 25* .3 .6 50
Burnt Mtn 5880 .5 .0 * .9 1.5 60
Canyon 7870 .1 .0 * 1.1 .6 183
Cole Creek 7850 .9 .8 112* 1.1 1.2 92
Evening Star 9200 .1 .4 25* 1.0 1.0 100
Fisher Creek 9100 .1 .3 33* 1.5 1.0 150
Northeast Entrance 7350 .1 .0 * .8 .6 133
Parker Peak 9400 .5 .7 71* 1.2 .9 133
Sylvan Lake 8420 .2 .2 100* 1.4 1.0 140
Thumb Divide 7980 .0 .0 * 1.1 .7 157
Two Ocean Plateau 9240 .2 .6 33* 1.0 .9 111
White Mill 8700 .0 .3 0* .6 .9 67
Wolverine 7650 .0 .0 * .6 .6 100
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Basin Index (%) 71* 110
WIND RIVER
Burroughs Creek 8750 .0 -M * .7 -M *
Castle Creek 8400 .0 -M * .3 -M *
Cold Springs 9630 .5 .0 * .6 .6 100
Deer Park 9700 .5 .3 167* 1.1 .9 122
Hobbs Park 10100 .8 .2 400* 1.1 .7 157
Kirwin 9550 .3 .3 100* .4 .7 57
Little Warm 9370 .2 .0 * .5 .6 83
Owl Creek 8975 .4 .0 * .6 .6 100
South Pass 9040 .5 .0 * 1.1 .7 157
St. Lawrence Alt 8620 .5 .0 * 1.2 .6 200
Togwotee Pass 9580 .3 .4 75* .9 .7 129
Townsend Creek 8700 .9 .0 * 1.1 .8 138
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Basin Index (%) 408* 125
BIGHORN BASIN
Bald Mtn. 9380 .5 1.1 45* -M 1.0 *
Bear Trap Meadow 8200 .1 .0 * .2 .6 33
Bone Springs Div 9350 .5 .9 56* .6 1.0 60
Grave Springs 8550 .5 .0 * .5 .9 56
Kirwin 9550 .3 .3 100* .4 .7 57
Marquette 8760 .2 -M * .4 -M *
Middle Powder 7760 .2 .1 200* -M .9 *
Owl Creek 8975 .4 .0 * .6 .6 100
Powder River Pass 9480 .4 .0 * .3 .7 43
Shell Creek 9580 .2 1.1 18* .2 .9 22
Timber Creek 7950 .3 .0 * .6 .8 75
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Basin Index (%) 97* 55
SHOSHONE RIVER
Blackwater 9780 .7 .8 88* 1.4 1.0 140
Evening Star 9200 .1 .4 25* 1.0 1.0 100
Marquette 8760 .2 -M * .4 -M *
Sylvan Road 7120 .0 .0 * .1 .8 12
Younts Peak 8350 -M .2 * -M .7 *
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Basin Index (%) 67* 89
POWDER RIVER
Bear Trap Meadow 8200 .1 .0 * .2 .6 33
Cloud Peak Reservoir 9860 .7 .0 * .9 .9 100
Grave Springs 8550 .5 .0 * .5 .9 56
Hansen Sawmill 8360 .5 .0 * .8 .6 133
Middle Powder 7760 .2 .1 200* -M .9 *
Powder River Pass 9480 .4 .0 * .3 .7 43
Soldier Park 8720 .5 -M * .7 -M *
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Basin Index (%) 2400* 73
TONGUE RIVER
Big Goose 7990 .5 .0 * 1.0 .9 111
Bone Springs Div 9350 .5 .9 56* .6 1.0 60
Burgess Junction 7880 .4 .2 200* .6 .8 75
Dome Lake 8880 .3 .4 75* .5 1.0 50
Little Goose 8870 .7 -M * .8 -M *
Sucker Creek 8880 .6 .2 300* .6 .9 67
Tie Creek 6870 .8 .0 * 1.3 1.1 118
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Basin Index (%) 182* 81
BELLE FOURCHE
Cole Canyon 5910 .3 .0 * 1.0 .7 143
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Basin Index (%) * 143
CHEYENNE RIVER BASIN
Blind Park 6890 .1 .0 * .4 .9 44
North Rapid Creek 6130 .0 .0 * .4 .7 57
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Basin Index (%) * 50
UPPER N. PLATTE
Arapaho Ridge 10960 .6 .2 300* 2.0 .8 250
Blackhall Mtn 9820 .2 -M * 2.3 -M *
Columbine 9160 .1 .0 * 1.6 .9 178
Divide Peak 8880 .6 .0 * 2.3 1.1 209
Joe Wright 10120 .8 .0 * 2.4 1.0 240
Laprele Creek 8375 .1 .0 * .3 .7 43
Med Bow 10500 .1 -M * 2.0 -M *
North French Creek 10130 .1 .2 50* 1.5 1.0 150
Never Summer 10280 .8 .3 267* 2.0 -M *
Old Battle 10000 1.0 .2 500* 3.0 1.4 214
Rawah 9020 .5 .0 * 1.9 .8 238
Sage Creek Basin 7850 .2 .0 * 2.1 .9 233
Sand Lake 10050 .1 .2 50* .5 1.0 50
South Brush Creek 8440 .0 .0 * .5 .8 62
Tower 10500 .4 .5 80* .7 1.3 54
Webber Springs 9250 .4 .0 * 2.6 1.1 236
Willow Creek Pass 9540 .5 .0 * 1.7 .5 340
Zirkel 9340 .1 .0 * 2.2 1.4 157
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Basin Index (%) 394* 172
SWEETWATER
Deer Park 9700 .5 .3 167* 1.1 .9 122
Larsen Creek 9000 .0 .0 * 1.2 -M *
South Pass 9040 .5 .0 * 1.1 .7 157
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Basin Index (%) 333* 138
LOWER N. PLATTE
Casper Mtn. 7900 .5 .0 * .7 .9 78
Laprele Creek 8375 .1 .0 * .3 .7 43
Reno Hill 8400 .4 .0 * .6 .8 75
Windy Peak 7900 .3 .0 * -M .6 *
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Basin Index (%) * 67
LARAMIE RIVER
Brooklyn Lake 10240 .2 .0 * .7 .6 117
Cinnabar Park 9574 .4 .0 * 1.6 .8 200
Crow Creek 8330 .0 .0 * .8 .4 200
Deadman Hill 10220 .4 .0 * 1.0 .7 143
Rawah 9020 .5 .0 * 1.9 .8 238
Roach 9700 .6 .0 * 1.3 .7 186
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Basin Index (%) * 182
S. PLATTE
Black Mountain 8920 .3 -M * .8 -M *
Crow Creek 8330 .0 .0 * .8 .4 200
Deadman Hill 10220 .4 .0 * 1.0 .7 143
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Basin Index (%) * 164
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 .0 * 2.2 .7 314
Divide Peak 8880 .6 .0 * 2.3 1.1 209
Elk River 8700 .2 .0 * .8 .9 89
Little Snake River 8915 .0 .0 * 3.4 1.4 243
Old Battle 10000 1.0 .2 500* 3.0 1.4 214
Sage Creek Basin 7850 .2 .0 * 2.1 .9 233
Sandstone RS 8150 .1 .0 * 1.6 .8 200
Whiskey Park 8950 .4 .0 * 2.7 1.0 270
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Basin Index (%) 1300* 221
UPPER GREEN RIVER
Big Sandy Opening 9080 .3 .0 * 1.4 .5 280
Blind Bull Sum 8650 .0 .0 * 1.6 .6 267
East Rim Divide 7930 .0 .0 * .9 .4 225
Elkhart Park G.S. 9400 .3 .0 * 1.3 .6 217
Gros Ventre Summit 8750 .1 .0 * .6 .5 120
Gunsight Pass 9820 .0 .0 * 1.1 .7 157
Kendall R.S. 7740 .2 .0 * 1.1 .4 275
Loomis Park 8240 -M .0 * -M .5 *
New Fork Lake 8340 .0 .0 * .5 .4 125
Pocket Creek 9360 .1 -M * 1.5 -M *
Snyder Basin 8060 .0 .0 * 1.4 .3 467
Spring Creek Divide 9000 .1 .0 * 1.5 .5 300
Triple Peak 8500 .1 .0 * 1.6 .6 267
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Basin Index (%) * 236
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 1.7 -M *
Buck Pasture 9632 .3 -M * 2.4 -M *
EF Blacks Fork GS 9360 .2 -M * 1.5 -M *
Hams Fork 7840 .0 .0 * 1.3 .3 433
Hewinta 9500 .1 .0 * 1.8 .7 257
Hickerson Park 9122 1.5 .0 * 2.5 .6 417
Hole-in-Rock 9168 .2 .0 * 2.0 .6 333
Indian Creek 9425 .2 .0 * 1.2 .5 240
Kelley R.S. 8180 .7 .0 * 1.4 .5 280
Spirit Lk 10235 1.2 -M * 3.5 -M *
Steel Creek Park 10158 .0 .0 * 1.7 .8 212
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Basin Index (%) * 298
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 1.9 -M *
Bug Lake 7987 .6 .0 * 2.6 .6 433
Burts Miller Ranch 8000 .4 -M * 1.2 -M *
Chalk Creek #1 9171 .5 .0 * 4.1 .9 456
Hayden Fork 9130 .0 .0 * 3.0 .8 375
Kelley R.S. 8180 .7 .0 * 1.4 .5 280
Lily Lake 9133 .0 .0 * 2.0 .8 250
Monte Cristo 8932 1.0 .0 * 2.5 .8 312
Salt River Summit 7640 .0 .0 * 1.6 .5 320
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Basin Index (%) * 351
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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.
