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 13 , 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 .7 157
Black Bear 8170 1.0 .7 143* 2.8 1.5 187
Blind Bull Sum 8650 .0 .1 0* 1.6 .8 200
Cottonwood Creek 7670 .0 .0 * 1.5 1.0 150
East Rim Divide 7930 .0 .0 * 1.0 .5 200
Grand Targhee 9260 1.3 1.2 108* 2.3 2.4 96
Granite Creek 6770 .0 .0 * 1.4 .6 233
Grassy Lake 7265 .4 .0 * 1.4 1.3 108
Gros Ventre Summit 8750 .1 .3 33* .9 .7 129
Gunsight Pass 9820 .0 .0 * 1.5 .9 167
Lewis Lake Divide 7850 .0 .0 * 1.6 1.1 145
Phillips Bench 8200 .0 .0 * 1.8 .8 225
Salt River Summit 7640 .0 .0 * 1.6 .7 229
Snake River Station 6920 .0 .0 * 1.3 1.0 130
Spring Creek Divide 9000 .3 .0 * 1.7 .7 243
Thumb Divide 7980 .0 .0 * 1.2 1.0 120
Togwotee Pass 9580 .5 .9 56* 1.1 .9 122
Two Ocean Plateau 9240 .8 1.1 73* 1.4 1.1 127
Willow Creek 8080 .0 .0 * 2.7 1.3 208
Younts Peak 8350 -M .4 * -M .9 *
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Basin Index (%) 105* 157
MADISON-GALLATIN
Black Bear 8170 1.0 .7 143* 2.8 1.5 187
Canyon 7870 .2 .0 * 1.3 .8 162
Madison Plateau 7750 .3 .3 100* 1.9 1.1 173
West Yellowstone 6700 .1 .0 * 1.3 .9 144
Whiskey Creek 6800 .1 .0 * .8 1.0 80
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Basin Index (%) 170* 153
YELLOWSTONE
Beartooth Lake 9360 .4 1.0 40* .4 .9 44
Burnt Mtn 5880 .6 .0 * 1.5 2.2 68
Canyon 7870 .2 .0 * 1.3 .8 162
Cole Creek 7850 1.8 .9 200* 1.4 1.5 93
Evening Star 9200 .7 .7 100* 1.5 1.2 125
Fisher Creek 9100 .4 .8 50* 1.7 1.3 131
Northeast Entrance 7350 .1 .0 * .9 .8 112
Parker Peak 9400 1.1 .9 122* 1.8 1.2 150
Sylvan Lake 8420 1.3 .3 433* 2.7 1.2 225
Thumb Divide 7980 .0 .0 * 1.2 1.0 120
Two Ocean Plateau 9240 .8 1.1 73* 1.4 1.1 127
White Mill 8700 .2 .7 29* .8 1.1 73
Wolverine 7650 .0 .0 * .8 .8 100
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Basin Index (%) 119* 115
WIND RIVER
Burroughs Creek 8750 .0 -M * 1.0 -M *
Castle Creek 8400 .0 -M * .4 -M *
Cold Springs 9630 .7 .0 * .9 .8 112
Deer Park 9700 .8 .5 160* 1.5 1.3 115
Hobbs Park 10100 1.1 .5 220* 1.5 .9 167
Kirwin 9550 .5 .5 100* .6 .8 75
Little Warm 9370 .1 .1 100* 1.1 .7 157
Owl Creek 8975 .6 .0 * .8 .6 133
South Pass 9040 .7 .0 * 1.4 .9 156
St. Lawrence Alt 8620 .5 .0 * 1.4 .8 175
Togwotee Pass 9580 .5 .9 56* 1.1 .9 122
Townsend Creek 8700 .9 .0 * 1.5 .9 167
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Basin Index (%) 256* 137
BIGHORN BASIN
Bald Mtn. 9380 .7 1.4 50* .7 1.2 58
Bear Trap Meadow 8200 .5 .0 * .7 .7 100
Bone Springs Div 9350 .5 1.1 45* .9 1.2 75
Grave Springs 8550 .6 .0 * 1.1 1.1 100
Kirwin 9550 .5 .5 100* .6 .8 75
Marquette 8760 .3 -M * .7 -M *
Middle Powder 7760 .4 .2 200* .5 1.1 45
Owl Creek 8975 .6 .0 * .8 .6 133
Powder River Pass 9480 .5 .1 500* .6 .9 67
Shell Creek 9580 .6 1.3 46* .7 1.1 64
Timber Creek 7950 .5 .0 * .9 1.0 90
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Basin Index (%) 117* 77
SHOSHONE RIVER
Blackwater 9780 1.0 1.0 100* 1.8 1.2 150
Evening Star 9200 .7 .7 100* 1.5 1.2 125
Marquette 8760 .3 -M * .7 -M *
Sylvan Road 7120 .4 .0 * .5 .9 56
Younts Peak 8350 -M .4 * -M .9 *
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Basin Index (%) 124* 115
POWDER RIVER
Bear Trap Meadow 8200 .5 .0 * .7 .7 100
Cloud Peak Reservoir 9860 1.0 .2 500* 1.3 1.2 108
Grave Springs 8550 .6 .0 * 1.1 1.1 100
Hansen Sawmill 8360 .7 .0 * 1.0 .8 125
Middle Powder 7760 .4 .2 200* .5 1.1 45
Powder River Pass 9480 .5 .1 500* .6 .9 67
Soldier Park 8720 .8 -M * 1.0 -M *
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Basin Index (%) 740* 90
TONGUE RIVER
Big Goose 7990 .7 .2 350* 1.2 1.2 100
Bone Springs Div 9350 .5 1.1 45* .9 1.2 75
Burgess Junction 7880 .5 .3 167* 1.0 1.1 91
Dome Lake 8880 .7 .5 140* .9 1.2 75
Little Goose 8870 .9 -M * .9 -M *
Sucker Creek 8880 .8 .3 267* 1.2 1.2 100
Tie Creek 6870 1.2 .0 * 1.8 1.4 129
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Basin Index (%) 183* 96
BELLE FOURCHE
Cole Canyon 5910 .4 .0 * 1.2 1.1 109
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Basin Index (%) * 109
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * .6 1.0 60
North Rapid Creek 6130 .0 .0 * .4 .9 44
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Basin Index (%) * 53
UPPER N. PLATTE
Arapaho Ridge 10960 1.6 .4 400* 3.0 1.2 250
Blackhall Mtn 9820 .9 -M * 3.1 -M *
Columbine 9160 .8 .0 * 2.4 1.1 218
Divide Peak 8880 1.0 .0 * 2.8 1.4 200
Joe Wright 10120 1.6 .4 400* 3.6 1.4 257
Laprele Creek 8375 .6 .0 * .9 .8 112
Med Bow 10500 .2 -M * 2.4 -M *
North French Creek 10130 .0 .5 0* 1.7 1.3 131
Never Summer 10280 1.7 .5 340* 3.1 -M *
Old Battle 10000 1.8 .6 300* 3.9 1.7 229
Rawah 9020 1.0 .0 * 2.4 1.0 240
Sage Creek Basin 7850 .2 .0 * 2.3 1.0 230
Sand Lake 10050 .4 .6 67* .8 1.3 62
South Brush Creek 8440 .0 .0 * .9 1.0 90
Tower 10500 2.2 .9 244* 2.5 1.7 147
Webber Springs 9250 .8 .0 * 3.2 1.3 246
Willow Creek Pass 9540 1.3 .0 * 2.5 .7 357
Zirkel 9340 .8 .0 * 3.0 1.9 158
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Basin Index (%) 405* 191
SWEETWATER
Deer Park 9700 .8 .5 160* 1.5 1.3 115
Larsen Creek 9000 .0 .0 * 1.3 -M *
South Pass 9040 .7 .0 * 1.4 .9 156
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Basin Index (%) 300* 132
LOWER N. PLATTE
Casper Mtn. 7900 .5 .1 500* .9 1.1 82
Laprele Creek 8375 .6 .0 * .9 .8 112
Reno Hill 8400 .8 .0 * 1.0 1.0 100
Windy Peak 7900 .7 .0 * .2 .8 25
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Basin Index (%) 2600* 81
LARAMIE RIVER
Brooklyn Lake 10240 .7 .0 * 1.2 .9 133
Cinnabar Park 9574 1.0 .0 * 2.2 1.2 183
Crow Creek 8330 .1 .0 * 1.0 .8 125
Deadman Hill 10220 1.0 .3 333* 1.6 1.0 160
Rawah 9020 1.0 .0 * 2.4 1.0 240
Roach 9700 1.2 .0 * 2.0 .9 222
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Basin Index (%) 1667* 179
S. PLATTE
Black Mountain 8920 .6 -M * 1.1 -M *
Crow Creek 8330 .1 .0 * 1.0 .8 125
Deadman Hill 10220 1.0 .3 333* 1.6 1.0 160
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Basin Index (%) 367* 144
LITTLE SNAKE RIVER
Battle Mountain 7440 .2 .0 * 2.0 .8 250
Divide Peak 8880 1.0 .0 * 2.8 1.4 200
Elk River 8700 .6 .0 * 1.4 1.1 127
Little Snake River 8915 .2 .0 * 4.3 1.8 239
Old Battle 10000 1.8 .6 300* 3.9 1.7 229
Sage Creek Basin 7850 .2 .0 * 2.3 1.0 230
Sandstone RS 8150 .1 .0 * 1.9 .9 211
Whiskey Park 8950 1.0 .0 * 3.3 1.2 275
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Basin Index (%) 850* 221
UPPER GREEN RIVER
Big Sandy Opening 9080 .3 .0 * 1.5 .7 214
Blind Bull Sum 8650 .0 .1 0* 1.6 .8 200
East Rim Divide 7930 .0 .0 * 1.0 .5 200
Elkhart Park G.S. 9400 .8 .0 * 1.9 .8 238
Gros Ventre Summit 8750 .1 .3 33* .9 .7 129
Gunsight Pass 9820 .0 .0 * 1.5 .9 167
Kendall R.S. 7740 .1 .0 * 1.2 .5 240
Loomis Park 8240 -M .0 * -M .7 *
New Fork Lake 8340 .0 .0 * .9 .5 180
Pocket Creek 9360 .5 -M * 2.1 -M *
Snyder Basin 8060 .0 .0 * 1.5 .5 300
Spring Creek Divide 9000 .3 .0 * 1.7 .7 243
Triple Peak 8500 .0 .0 * 1.8 .8 225
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Basin Index (%) 400* 209
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 .4 -M * 1.9 -M *
Hams Fork 7840 .0 .0 * 1.5 .5 300
Hewinta 9500 .0 .0 * 2.1 .9 233
Hickerson Park 9122 1.5 .0 * 2.8 .7 400
Hole-in-Rock 9168 .1 .0 * 2.4 .8 300
Indian Creek 9425 .3 .4 75* 1.3 .8 162
Kelley R.S. 8180 .7 .0 * 1.5 .7 214
Spirit Lk 10235 1.5 -M * 4.1 -M *
Steel Creek Park 10158 .1 .3 33* 2.3 1.0 230
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Basin Index (%) 386* 257
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 2.2 -M *
Bug Lake 7987 .8 .0 * 3.3 .9 367
Burts Miller Ranch 8000 .3 -M * 1.3 -M *
Chalk Creek #1 9171 .7 .0 * 4.9 1.2 408
Hayden Fork 9130 .1 .0 * 3.5 1.0 350
Kelley R.S. 8180 .7 .0 * 1.5 .7 214
Lily Lake 9133 .0 .0 * 2.4 1.0 240
Monte Cristo 8932 1.5 .0 * 2.9 1.0 290
Salt River Summit 7640 .0 .0 * 1.6 .7 229
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Basin Index (%) * 309
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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.