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 TUESDAY: OCTOBER 16 , 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 .2 .0 * 1.3 1.0 130
Black Bear 8170 1.1 1.1 100* 2.7 1.8 150
Blind Bull Sum 8650 .0 .2 0* 1.7 1.0 170
Cottonwood Creek 7670 .2 .0 * 1.6 1.3 123
East Rim Divide 7930 .0 .0 * 1.1 .7 157
Grand Targhee 9260 1.5 1.6 94* 2.5 2.7 93
Granite Creek 6770 .2 .0 * 1.5 .9 167
Grassy Lake 7265 .5 .0 * 1.9 1.7 112
Gros Ventre Summit 8750 .3 .6 50* 1.2 .9 133
Gunsight Pass 9820 .1 .1 100* 1.7 1.2 142
Lewis Lake Divide 7850 .0 .0 * 1.7 1.5 113
Phillips Bench 8200 .0 .0 * 2.0 1.1 182
Salt River Summit 7640 .0 .0 * 1.7 .9 189
Snake River Station 6920 .0 .0 * 1.5 1.3 115
Spring Creek Divide 9000 .4 .1 400* 1.8 1.0 180
Thumb Divide 7980 .0 .0 * 1.3 1.2 108
Togwotee Pass 9580 .6 1.3 46* 1.2 1.3 92
Two Ocean Plateau 9240 1.1 1.5 73* 1.6 1.4 114
Willow Creek 8080 .0 .0 * 2.9 1.8 161
Younts Peak 8350 -M .5 * -M 1.1 *
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Basin Index (%) 95* 133
MADISON-GALLATIN
Black Bear 8170 1.1 1.1 100* 2.7 1.8 150
Canyon 7870 .4 .1 400* 1.7 1.0 170
Madison Plateau 7750 .5 .4 125* 2.1 1.4 150
West Yellowstone 6700 .1 .0 * 1.4 1.0 140
Whiskey Creek 6800 -M .0 * -M 1.2 *
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Basin Index (%) 131* 152
YELLOWSTONE
Beartooth Lake 9360 .8 1.2 67* .8 1.1 73
Burnt Mtn 5880 1.4 .0 * 2.7 2.4 112
Canyon 7870 .4 .1 400* 1.7 1.0 170
Cole Creek 7850 3.2 1.2 267* 2.7 1.8 150
Evening Star 9200 1.4 1.0 140* 2.3 1.6 144
Fisher Creek 9100 .9 1.2 75* 2.1 1.7 124
Northeast Entrance 7350 .5 .0 * 1.2 1.0 120
Parker Peak 9400 1.5 1.1 136* 2.3 1.5 153
Sylvan Lake 8420 1.6 .5 320* 2.9 1.6 181
Thumb Divide 7980 .0 .0 * 1.3 1.2 108
Two Ocean Plateau 9240 1.1 1.5 73* 1.6 1.4 114
White Mill 8700 .5 1.0 50* 1.0 1.4 71
Wolverine 7650 .0 .0 * 1.1 1.0 110
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Basin Index (%) 151* 127
WIND RIVER
Burroughs Creek 8750 .0 -M * .9 -M *
Castle Creek 8400 .3 -M * .7 -M *
Cold Springs 9630 .9 .0 * 1.2 1.0 120
Deer Park 9700 1.0 .6 167* 1.6 1.5 107
Hobbs Park 10100 1.2 .7 171* 1.7 1.1 155
Kirwin 9550 .7 .7 100* .9 1.0 90
Little Warm 9370 .1 .2 50* 1.5 1.0 150
Owl Creek 8975 1.1 .1 1100* 1.2 .7 171
South Pass 9040 .9 .0 * 1.7 1.0 170
St. Lawrence Alt 8620 .7 .0 * 1.9 .9 211
Togwotee Pass 9580 .6 1.3 46* 1.2 1.3 92
Townsend Creek 8700 1.2 .0 * 1.8 1.1 164
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Basin Index (%) 233* 139
BIGHORN BASIN
Bald Mtn. 9380 1.4 1.7 82* 1.2 1.5 80
Bear Trap Meadow 8200 .8 .1 800* 1.1 .9 122
Bone Springs Div 9350 1.5 1.3 115* 1.7 1.4 121
Grave Springs 8550 1.0 .0 * 1.7 1.2 142
Kirwin 9550 .7 .7 100* .9 1.0 90
Marquette 8760 .5 -M * 1.0 -M *
Middle Powder 7760 1.5 .3 500* 1.5 1.3 115
Owl Creek 8975 1.1 .1 1100* 1.2 .7 171
Powder River Pass 9480 .9 .3 300* 1.2 1.2 100
Shell Creek 9580 1.7 1.6 106* 2.0 1.3 154
Timber Creek 7950 .8 .0 * 1.1 1.2 92
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Basin Index (%) 187* 116
SHOSHONE RIVER
Blackwater 9780 1.5 1.3 115* 2.2 1.5 147
Evening Star 9200 1.4 1.0 140* 2.3 1.6 144
Marquette 8760 .5 -M * 1.0 -M *
Sylvan Road 7120 .7 .0 * 1.0 1.2 83
Younts Peak 8350 -M .5 * -M 1.1 *
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Basin Index (%) 157* 128
POWDER RIVER
Bear Trap Meadow 8200 .8 .1 800* 1.1 .9 122
Cloud Peak Reservoir 9860 1.7 .6 283* 2.0 1.5 133
Grave Springs 8550 1.0 .0 * 1.7 1.2 142
Hansen Sawmill 8360 1.4 .0 * 1.8 1.0 180
Middle Powder 7760 1.5 .3 500* 1.5 1.3 115
Powder River Pass 9480 .9 .3 300* 1.2 1.2 100
Soldier Park 8720 1.3 -M * 1.6 -M *
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Basin Index (%) 562* 131
TONGUE RIVER
Big Goose 7990 1.4 .3 467* 2.2 1.5 147
Bone Springs Div 9350 1.5 1.3 115* 1.7 1.4 121
Burgess Junction 7880 1.2 .4 300* 1.7 1.3 131
Dome Lake 8880 1.5 .7 214* 2.1 1.5 140
Little Goose 8870 2.0 -M * 1.6 -M *
Sucker Creek 8880 1.6 .6 267* 1.9 1.4 136
Tie Creek 6870 1.7 .0 * 2.6 1.6 162
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Basin Index (%) 270* 140
BELLE FOURCHE
Cole Canyon 5910 .8 .0 * 1.6 1.2 133
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Basin Index (%) * 133
CHEYENNE RIVER BASIN
Blind Park 6890 .6 .0 * 1.0 1.2 83
North Rapid Creek 6130 .3 .0 * .8 1.0 80
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Basin Index (%) * 82
UPPER N. PLATTE
Arapaho Ridge 10960 1.8 .8 225* 3.2 1.6 200
Blackhall Mtn 9820 1.2 -M * 3.5 -M *
Columbine 9160 .7 .0 * 2.8 1.4 200
Divide Peak 8880 .8 .3 267* 3.0 1.6 188
Joe Wright 10120 1.9 .6 317* 4.3 1.8 239
Laprele Creek 8375 .6 .0 * 1.2 .9 133
Med Bow 10500 .8 -M * 3.1 -M *
North French Creek 10130 .5 .7 71* 2.4 1.6 150
Never Summer 10280 1.8 .6 300* 3.3 -M *
Old Battle 10000 2.0 .9 222* 4.2 2.1 200
Rawah 9020 1.2 .0 * 2.6 1.2 217
Sage Creek Basin 7850 .0 .0 * 2.4 1.1 218
Sand Lake 10050 .8 .9 89* 1.3 1.6 81
South Brush Creek 8440 .3 .0 * 1.3 1.2 108
Tower 10500 2.6 1.1 236* 2.9 2.1 138
Webber Springs 9250 1.0 .0 * 3.3 1.6 206
Willow Creek Pass 9540 1.4 .2 700* 2.6 .9 289
Zirkel 9340 .9 .0 * 3.2 2.2 145
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Basin Index (%) 300* 178
SWEETWATER
Deer Park 9700 1.0 .6 167* 1.6 1.5 107
Larsen Creek 9000 .0 .0 * 1.5 -M *
South Pass 9040 .9 .0 * 1.7 1.0 170
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Basin Index (%) 317* 132
LOWER N. PLATTE
Casper Mtn. 7900 .8 .1 800* 1.3 1.3 100
Laprele Creek 8375 .6 .0 * 1.2 .9 133
Reno Hill 8400 .9 .2 450* 1.2 1.2 100
Windy Peak 7900 .8 .0 * .4 .9 44
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Basin Index (%) 1033* 95
LARAMIE RIVER
Brooklyn Lake 10240 1.1 .0 * 1.9 1.2 158
Cinnabar Park 9574 1.4 .0 * 2.8 1.4 200
Crow Creek 8330 .4 .0 * 1.6 1.1 145
Deadman Hill 10220 1.3 .7 186* 2.1 1.3 162
Rawah 9020 1.2 .0 * 2.6 1.2 217
Roach 9700 1.3 .0 * 2.2 1.2 183
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Basin Index (%) 957* 178
S. PLATTE
Black Mountain 8920 .7 -M * 1.4 -M *
Crow Creek 8330 .4 .0 * 1.6 1.1 145
Deadman Hill 10220 1.3 .7 186* 2.1 1.3 162
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Basin Index (%) 243* 154
LITTLE SNAKE RIVER
Battle Mountain 7440 .2 .0 * 1.1 .9 122
Divide Peak 8880 .8 .3 267* 3.0 1.6 188
Elk River 8700 .3 .0 * 1.8 1.3 138
Little Snake River 8915 .0 .0 * 4.6 2.1 219
Old Battle 10000 2.0 .9 222* 4.2 2.1 200
Sage Creek Basin 7850 .0 .0 * 2.4 1.1 218
Sandstone RS 8150 .2 .0 * 2.1 1.0 210
Whiskey Park 8950 1.3 .0 * 3.8 1.4 271
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Basin Index (%) 400* 200
UPPER GREEN RIVER
Big Sandy Opening 9080 .4 .3 133* 1.6 .9 178
Blind Bull Sum 8650 .0 .2 0* 1.7 1.0 170
East Rim Divide 7930 .0 .0 * 1.1 .7 157
Elkhart Park G.S. 9400 .9 .2 450* 2.1 1.0 210
Gros Ventre Summit 8750 .3 .6 50* 1.2 .9 133
Gunsight Pass 9820 .1 .1 100* 1.7 1.2 142
Kendall R.S. 7740 .2 .0 * 1.2 .7 171
Loomis Park 8240 -M .0 * -M .9 *
New Fork Lake 8340 .0 .0 * 1.1 .7 157
Pocket Creek 9360 .7 -M * 2.2 -M *
Snyder Basin 8060 .0 .0 * 1.5 .7 214
Spring Creek Divide 9000 .4 .1 400* 1.8 1.0 180
Triple Peak 8500 .4 .0 * 1.9 1.0 190
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Basin Index (%) 180* 172
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 2.1 -M *
Buck Pasture 9632 .1 -M * 3.1 -M *
EF Blacks Fork GS 9360 .2 -M * 2.2 -M *
Hams Fork 7840 .0 .0 * 1.5 .6 250
Hewinta 9500 .0 .0 * 2.2 1.0 220
Hickerson Park 9122 1.6 .0 * 3.1 .8 388
Hole-in-Rock 9168 .3 .0 * 2.6 .9 289
Indian Creek 9425 .4 .6 67* 1.5 1.0 150
Kelley R.S. 8180 .8 .0 * 1.6 .8 200
Spirit Lk 10235 1.5 -M * 4.3 -M *
Steel Creek Park 10158 .4 .5 80* 2.5 1.2 208
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Basin Index (%) 318* 238
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 2.4 -M *
Bug Lake 7987 .7 .0 * 3.5 1.2 292
Burts Miller Ranch 8000 .0 -M * 1.4 -M *
Chalk Creek #1 9171 .9 .0 * 5.1 1.5 340
Hayden Fork 9130 .1 .0 * 3.6 1.2 300
Kelley R.S. 8180 .8 .0 * 1.6 .8 200
Lily Lake 9133 .0 .0 * 2.5 1.2 208
Monte Cristo 8932 1.6 .0 * 3.0 1.4 214
Salt River Summit 7640 .0 .0 * 1.7 .9 189
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Basin Index (%) * 256
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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.