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 SUNDAY: OCTOBER 14 , 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 * 1.1 .8 138
Black Bear 8170 1.0 .8 125* 2.6 1.6 162
Blind Bull Sum 8650 .0 .1 0* 1.7 .8 212
Cottonwood Creek 7670 .2 .0 * 1.7 1.0 170
East Rim Divide 7930 .0 .0 * .9 .6 150
Grand Targhee 9260 1.4 1.3 108* 2.2 2.6 85
Granite Creek 6770 .0 .0 * 1.4 .7 200
Grassy Lake 7265 .4 .0 * 1.4 1.4 100
Gros Ventre Summit 8750 .2 .5 40* .9 .7 129
Gunsight Pass 9820 .0 .0 * 1.6 1.0 160
Lewis Lake Divide 7850 .0 .0 * 1.8 1.3 138
Phillips Bench 8200 .0 .0 * 1.9 .9 211
Salt River Summit 7640 .0 .0 * 1.6 .7 229
Snake River Station 6920 .0 .0 * 1.4 1.1 127
Spring Creek Divide 9000 .2 .0 * 1.6 .8 200
Thumb Divide 7980 .0 .0 * 1.2 1.0 120
Togwotee Pass 9580 .5 1.0 50* 1.1 1.0 110
Two Ocean Plateau 9240 .9 1.2 75* 1.5 1.2 125
Willow Creek 8080 .0 .0 * 2.8 1.4 200
Younts Peak 8350 -M .4 * -M 1.0 *
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Basin Index (%) 100* 148
MADISON-GALLATIN
Black Bear 8170 1.0 .8 125* 2.6 1.6 162
Canyon 7870 .3 .0 * 1.3 .9 144
Madison Plateau 7750 .4 .3 133* 1.9 1.2 158
West Yellowstone 6700 .1 .0 * 1.3 .9 144
Whiskey Creek 6800 .0 .0 * .7 1.0 70
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Basin Index (%) 164* 139
YELLOWSTONE
Beartooth Lake 9360 .7 1.0 70* .6 .9 67
Burnt Mtn 5880 1.5 .0 * 2.5 2.2 114
Canyon 7870 .3 .0 * 1.3 .9 144
Cole Creek 7850 3.1 1.0 310* 2.6 1.5 173
Evening Star 9200 1.3 .8 162* 2.2 1.3 169
Fisher Creek 9100 .6 1.0 60* 1.8 1.4 129
Northeast Entrance 7350 .5 .0 * 1.2 .8 150
Parker Peak 9400 1.4 1.0 140* 2.2 1.3 169
Sylvan Lake 8420 1.6 .4 400* 2.9 1.4 207
Thumb Divide 7980 .0 .0 * 1.2 1.0 120
Two Ocean Plateau 9240 .9 1.2 75* 1.5 1.2 125
White Mill 8700 .4 .8 50* .8 1.2 67
Wolverine 7650 .0 .0 * .9 .9 100
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Basin Index (%) 171* 136
WIND RIVER
Burroughs Creek 8750 .0 -M * .7 -M *
Castle Creek 8400 .2 -M * .6 -M *
Cold Springs 9630 .8 .0 * .9 .9 100
Deer Park 9700 .9 .6 150* 1.3 1.4 93
Hobbs Park 10100 1.1 .6 183* 1.4 .9 156
Kirwin 9550 .5 .6 83* .6 .9 67
Little Warm 9370 .0 .2 0* .4 .8 50
Owl Creek 8975 1.0 .0 * 1.1 .7 157
South Pass 9040 .7 .0 * 1.3 1.0 130
St. Lawrence Alt 8620 .7 .0 * 1.8 .8 225
Togwotee Pass 9580 .5 1.0 50* 1.1 1.0 110
Townsend Creek 8700 1.1 .0 * 1.6 1.0 160
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Basin Index (%) 243* 122
BIGHORN BASIN
Bald Mtn. 9380 1.3 1.5 87* -M 1.3 *
Bear Trap Meadow 8200 .6 .0 * .7 .8 88
Bone Springs Div 9350 1.4 1.2 117* 1.2 1.3 92
Grave Springs 8550 .9 .0 * .9 1.1 82
Kirwin 9550 .5 .6 83* .6 .9 67
Marquette 8760 .3 -M * .8 -M *
Middle Powder 7760 1.3 .3 433* .9 1.1 82
Owl Creek 8975 1.0 .0 * 1.1 .7 157
Powder River Pass 9480 .9 .2 450* .8 1.0 80
Shell Creek 9580 1.5 1.4 107* 1.5 1.2 125
Timber Creek 7950 .8 .0 * 1.1 1.0 110
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Basin Index (%) 196* 97
SHOSHONE RIVER
Blackwater 9780 1.4 1.1 127* 2.2 1.3 169
Evening Star 9200 1.3 .8 162* 2.2 1.3 169
Marquette 8760 .3 -M * .8 -M *
Sylvan Road 7120 .6 .0 * .7 1.0 70
Younts Peak 8350 -M .4 * -M 1.0 *
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Basin Index (%) 174* 142
POWDER RIVER
Bear Trap Meadow 8200 .6 .0 * .7 .8 88
Cloud Peak Reservoir 9860 1.5 .4 375* 1.4 1.3 108
Grave Springs 8550 .9 .0 * .9 1.1 82
Hansen Sawmill 8360 1.3 .0 * 1.7 .9 189
Middle Powder 7760 1.3 .3 433* .9 1.1 82
Powder River Pass 9480 .9 .2 450* .8 1.0 80
Soldier Park 8720 1.1 -M * 1.4 -M *
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Basin Index (%) 722* 103
TONGUE RIVER
Big Goose 7990 1.3 .1 1300* 1.9 1.3 146
Bone Springs Div 9350 1.4 1.2 117* 1.2 1.3 92
Burgess Junction 7880 1.1 .4 275* 1.3 1.2 108
Dome Lake 8880 1.4 .6 233* 1.6 1.3 123
Little Goose 8870 1.9 -M * 1.5 -M *
Sucker Creek 8880 1.4 .4 350* 1.4 1.3 108
Tie Creek 6870 1.4 .0 * 1.9 1.4 136
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Basin Index (%) 296* 119
BELLE FOURCHE
Cole Canyon 5910 .8 .0 * 1.3 1.2 108
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Basin Index (%) * 108
CHEYENNE RIVER BASIN
Blind Park 6890 .5 .0 * .9 1.1 82
North Rapid Creek 6130 .3 .0 * .7 1.0 70
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Basin Index (%) * 76
UPPER N. PLATTE
Arapaho Ridge 10960 1.9 .5 380* 3.3 1.2 275
Blackhall Mtn 9820 1.2 -M * 3.4 -M *
Columbine 9160 .9 .0 * 2.8 1.2 233
Divide Peak 8880 .8 .0 * 2.8 1.4 200
Joe Wright 10120 1.9 .4 475* 4.1 1.5 273
Laprele Creek 8375 .5 .0 * .9 .8 112
Med Bow 10500 .9 -M * 3.0 -M *
North French Creek 10130 .6 .6 100* 2.2 1.4 157
Never Summer 10280 2.0 .5 400* 3.3 -M *
Old Battle 10000 2.0 .7 286* 4.0 1.8 222
Rawah 9020 1.2 .0 * 2.7 1.1 245
Sage Creek Basin 7850 .1 .0 * 2.4 1.1 218
Sand Lake 10050 1.0 .7 143* 1.1 1.4 79
South Brush Creek 8440 .3 .0 * 1.1 1.1 100
Tower 10500 2.5 .9 278* 2.8 1.8 156
Webber Springs 9250 1.1 .0 * 3.3 1.4 236
Willow Creek Pass 9540 1.5 .0 * 2.7 .8 338
Zirkel 9340 .8 .0 * 3.2 1.9 168
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Basin Index (%) 444* 198
SWEETWATER
Deer Park 9700 .9 .6 150* 1.3 1.4 93
Larsen Creek 9000 .0 .0 * 1.2 -M *
South Pass 9040 .7 .0 * 1.3 1.0 130
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Basin Index (%) 267* 108
LOWER N. PLATTE
Casper Mtn. 7900 .9 .1 900* 1.0 1.1 91
Laprele Creek 8375 .5 .0 * .9 .8 112
Reno Hill 8400 .6 .0 * -M 1.0 *
Windy Peak 7900 .6 .0 * .1 .8 12
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Basin Index (%) 2600* 74
LARAMIE RIVER
Brooklyn Lake 10240 1.1 .0 * 1.6 .9 178
Cinnabar Park 9574 1.3 .0 * 2.5 1.2 208
Crow Creek 8330 .3 .0 * 1.5 1.0 150
Deadman Hill 10220 1.4 .4 350* 2.0 1.0 200
Rawah 9020 1.2 .0 * 2.7 1.1 245
Roach 9700 1.3 .0 * 2.1 1.0 210
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Basin Index (%) 1650* 200
S. PLATTE
Black Mountain 8920 .7 -M * 1.4 -M *
Crow Creek 8330 .3 .0 * 1.5 1.0 150
Deadman Hill 10220 1.4 .4 350* 2.0 1.0 200
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Basin Index (%) 425* 175
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 .0 * 2.1 .8 262
Divide Peak 8880 .8 .0 * 2.8 1.4 200
Elk River 8700 .5 .0 * 1.6 1.2 133
Little Snake River 8915 .3 .0 * 4.6 1.9 242
Old Battle 10000 2.0 .7 286* 4.0 1.8 222
Sage Creek Basin 7850 .1 .0 * 2.4 1.1 218
Sandstone RS 8150 .1 .0 * 1.9 1.0 190
Whiskey Park 8950 1.3 .0 * 3.7 1.3 285
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Basin Index (%) 743* 220
UPPER GREEN RIVER
Big Sandy Opening 9080 .4 .1 400* 1.5 .8 188
Blind Bull Sum 8650 .0 .1 0* 1.7 .8 212
East Rim Divide 7930 .0 .0 * .9 .6 150
Elkhart Park G.S. 9400 .8 .0 * 1.8 .8 225
Gros Ventre Summit 8750 .2 .5 40* .9 .7 129
Gunsight Pass 9820 .0 .0 * 1.6 1.0 160
Kendall R.S. 7740 .1 .0 * 1.2 .6 200
Loomis Park 8240 -M .0 * -M .8 *
New Fork Lake 8340 .0 .0 * .8 .6 133
Pocket Creek 9360 .5 -M * 2.1 -M *
Snyder Basin 8060 .0 .0 * 1.6 .5 320
Spring Creek Divide 9000 .2 .0 * 1.6 .8 200
Triple Peak 8500 .1 .0 * 1.8 .9 200
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Basin Index (%) 257* 190
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 2.0 -M *
Buck Pasture 9632 .1 -M * 2.9 -M *
EF Blacks Fork GS 9360 .1 -M * 1.9 -M *
Hams Fork 7840 .0 .0 * 1.5 .5 300
Hewinta 9500 .0 .0 * 2.2 .9 244
Hickerson Park 9122 1.8 .0 * 3.1 .8 388
Hole-in-Rock 9168 .2 .0 * 2.6 .8 325
Indian Creek 9425 .3 .5 60* 1.2 .9 133
Kelley R.S. 8180 .7 .0 * 1.5 .7 214
Spirit Lk 10235 1.6 -M * 4.2 -M *
Steel Creek Park 10158 .2 .4 50* 2.3 1.1 209
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Basin Index (%) 356* 253
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 2.2 -M *
Bug Lake 7987 .8 .0 * 3.4 .9 378
Burts Miller Ranch 8000 .2 -M * 1.4 -M *
Chalk Creek #1 9171 .7 .0 * 4.9 1.3 377
Hayden Fork 9130 .0 .0 * 3.5 1.1 318
Kelley R.S. 8180 .7 .0 * 1.5 .7 214
Lily Lake 9133 .0 .0 * 2.4 1.1 218
Monte Cristo 8932 1.5 .0 * 2.9 1.2 242
Salt River Summit 7640 .0 .0 * 1.6 .7 229
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Basin Index (%) * 289
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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.