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 28 , 2020
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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 1.5 .1 1500* 1.8 1.8 100
Blind Bull Sum 8650 .4 1.0 40* 1.2 1.7 71
Cottonwood Creek 7670 .7 .6 117* 2.0 2.2 91
East Rim Divide 7930 .6 .0 * 1.6 1.1 145
Grand Targhee 9260 1.6 4.2 38* 2.6 4.9 53
Granite Creek 6770 1.1 .0 * 2.1 1.7 124
Grassy Lake 7265 .6 .8 75* 2.7 2.9 93
Gros Ventre Summit 8750 .4 1.6 25 1.5 1.5 100
Gunsight Pass 9820 .8 .8 100* 1.2 1.9 63
Lewis Lake Divide 7850 .5 .6 83* 3.0 2.8 107
Loomis Park 8240 .6 .3 200* 1.5 1.5 100
Phillips Bench 8200 1.5 .8 188* 3.0 2.1 143
Salt River Summit 7640 .3 .0 * .8 1.5 53
Snake River Station 6920 .7 .0 * 2.5 2.3 109
Somsen Ranch 6800 .1 .0 * .7 1.7 41
Spring Creek Divide 9000 .5 .9 56* 1.4 1.9 74
Thumb Divide 7980 1.1 .3 367* 2.0 2.0 100
Togwotee Pass 9580 3.2 2.4 133* 4.3 2.3 187
Triple Peak 8500 .8 .8 100* 2.1 2.0 105
Two Ocean Plateau 9240 3.2 2.9 110* 2.2 2.6 85
Willow Creek 8080 .5 .6 83* 1.5 3.1 48
Younts Peak 8350 1.2 1.3 92* 4.9 1.9 258
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Basin Index (%) 110* 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 .6 2.5 24* 2.4 3.3 73
Canyon 7870 .6 .3 200* 2.3 1.7 135
Madison Plateau 7750 1.0 1.0 100* 2.3 2.5 92
West Yellowstone 6700 .8 .0 * 1.9 1.6 119
Whiskey Creek 6800 .8 .3 267* 2.0 2.0 100
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Basin Index (%) 93* 98
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 6.5 2.3 283* 6.6 1.9 347
Canyon 7870 .6 .3 200* 2.3 1.7 135
Evening Star 9200 6.1 2.1 290* 7.1 2.7 263
Fisher Creek 9100 8.1 2.3 352* 10.4 3.1 335
Monument Peak 8850 4.6 1.6 288* 5.9 2.4 246
Northeast Entrance 7350 1.3 .0 * 5.4 1.5 360
Parker Peak 9400 3.8 2.3 165 4.6 2.4 192
Sylvan Lake 8420 1.5 1.3 115* 3.5 2.6 135
Thumb Divide 7980 1.1 .3 367* 2.0 2.0 100
Two Ocean Plateau 9240 3.2 2.9 110* 2.2 2.6 85
White Mill 8700 7.9 1.8 439* 8.3 2.4 346
Wolverine 7650 1.7 .0 * 5.9 1.7 347
Younts Peak 8350 1.2 1.3 92* 4.9 1.9 258
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Basin Index (%) 257* 239
WIND RIVER
Burroughs Creek 8750 1.5 -M * 3.8 -M *
Castle Creek 8400 1.3 -M * 2.6 -M *
Cold Springs 9630 .7 .5 140* 1.5 1.7 88
Deer Park 9700 .4 1.5 27* .9 2.6 35
Grave Springs 8550 .2 .8 25* 1.0 2.0 50
Hobbs Park 10100 .2 1.8 11 .8 2.1 38
Kirwin 9550 2.7 1.4 193 3.9 1.7 229
Little Warm 9370 1.2 1.0 120* 2.3 1.7 135
South Pass 9040 .4 1.1 36* .8 2.0 40
St. Lawrence Alt 8620 .4 .5 80* .7 1.5 47
Togwotee Pass 9580 3.2 2.4 133* 4.3 2.3 187
Townsend Creek 8700 .5 .7 71* .9 2.0 45
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Basin Index (%) 85* 87
BIGHORN BASIN
Bald Mtn. 9380 4.1 2.7 152 5.2 2.5 208
Bear Trap Meadow 8200 .9 .3 300* 2.4 1.5 160
Bone Springs Div 9350 3.5 2.3 152 3.4 2.5 136
Grave Springs 8550 .2 .8 25* 1.0 2.0 50
Kirwin 9550 2.7 1.4 193 3.9 1.7 229
Marquette 8760 1.2 -M * 1.6 -M *
Middle Powder 7760 .8 .8 100* 1.5 2.2 68
Owl Creek 8975 1.1 .6 183 1.1 1.2 92
Powder River Pass 9480 2.6 1.1 236 2.6 1.9 137
Shell Creek 9580 3.8 2.6 146 2.6 2.2 118
Timber Creek 7950 1.0 .4 250* .9 1.8 50
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Basin Index (%) 159 126
SHOSHONE RIVER
Blackwater 9780 4.4 2.5 176* 4.8 2.5 192
Evening Star 9200 6.1 2.1 290* 7.1 2.7 263
Marquette 8760 1.2 -M * 1.6 -M *
Sylvan Lake 8420 1.5 1.3 115* 3.5 2.6 135
Sylvan Road 7120 1.2 .0 * 2.3 2.0 115
Younts Peak 8350 1.2 1.3 92* 4.9 1.9 258
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Basin Index (%) 200* 193
POWDER RIVER
Bear Trap Meadow 8200 .9 .3 300* 2.4 1.5 160
Cloud Peak Reservoir 9860 2.3 1.6 144* 3.4 2.5 136
Grave Springs 8550 .2 .8 25* 1.0 2.0 50
Hansen Sawmill 8360 2.0 .2 1000* 2.5 1.7 147
Middle Powder 7760 .8 .8 100* 1.5 2.2 68
Powder River Pass 9480 2.6 1.1 236 2.6 1.9 137
Soldier Park 8720 2.1 -M * 2.8 -M *
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Basin Index (%) 183* 114
TONGUE RIVER
Big Goose 7990 2.0 .9 222* 3.7 2.3 161
Bone Springs Div 9350 3.5 2.3 152 3.4 2.5 136
Burgess Junction 7880 2.4 1.1 218* 3.4 2.2 155
Dome Lake 8880 2.8 1.5 187 4.4 2.4 183
Little Goose 8870 2.5 -M * 3.9 -M *
Sucker Creek 8880 3.2 1.4 229 4.8 2.4 200
Tie Creek 6870 1.4 .0 * 3.2 2.5 128
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Basin Index (%) 212* 160
BELLE FOURCHE
Blind Park 6890 .6 .0 * 2.4 2.0 120
Cole Canyon 5910 .5 .0 * 2.2 1.7 129
North Rapid Creek 6130 .6 .0 * 2.6 1.9 137
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Basin Index (%) * 129
CHEYENNE RIVER BASIN
Blind Park 6890 .6 .0 * 2.4 2.0 120
North Rapid Creek 6130 .6 .0 * 2.6 1.9 137
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Basin Index (%) * 128
UPPER N. PLATTE
Arapaho Ridge 10960 1.1 2.6 42 1.4 2.9 48
Blackhall Mtn 9820 1.1 -M * 1.7 -M *
Cinnabar Park 9574 -M 1.0 * -M 2.5 *
Columbine 9160 .9 .2 450* 1.2 2.3 52
Divide Peak 8880 1.0 1.1 91* 1.6 2.8 57
Joe Wright 10120 2.0 2.1 95* .0 3.0 0
Laprele Creek 8375 .8 .2 400* 1.1 1.7 65
Med Bow 10500 2.8 -M * 3.2 -M *
Never Summer 10280 1.8 2.0 90* 1.7 -M *
North French Creek 10130 1.3 2.4 54* 2.1 2.8 75
Old Battle 10000 1.1 2.3 48* 1.3 3.6 36
Rawah 9020 -M .1 * -M 2.1 *
Sage Creek Basin 7850 .7 .0 * .4 2.0 20
Sand Lake 10050 2.2 2.2 100* 2.6 2.7 96
South Brush Creek 8440 .8 .3 267* 1.4 2.0 70
Tower 10500 1.3 2.8 46* 2.0 3.8 53
Webber Springs 9250 1.1 .9 122* 1.3 2.8 46
Whiskey Park 8950 1.1 .6 183* 1.6 2.4 67
Willow Creek Pass 9540 1.4 .9 156* 1.3 1.8 72
Zirkel 9340 .9 .6 150* 1.7 3.4 50
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Basin Index (%) 92* 52
SWEETWATER
Deer Park 9700 .4 1.5 27* .9 2.6 35
Larsen Creek 9000 .0 .0 * .6 -M *
South Pass 9040 .4 1.1 36* .8 2.0 40
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Basin Index (%) 31* 37
LOWER N. PLATTE
Casper Mtn. 7900 -M .9 * .7 2.5 28
Laprele Creek 8375 .8 .2 400* 1.1 1.7 65
Reno Hill 8400 .4 1.1 36* .9 2.3 39
Windy Peak 7900 1.5 .2 750* 1.4 1.5 93
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Basin Index (%) 180* 51
LARAMIE RIVER
Brooklyn Lake 10240 1.3 1.1 118* 2.4 2.1 114
Cinnabar Park 9574 -M 1.0 * -M 2.5 *
Crow Creek 8330 1.4 .0 * 1.9 1.7 112
Deadman Hill 10220 2.6 1.9 137* 2.0 2.2 91
Rawah 9020 -M .1 * -M 2.1 *
Roach 9700 1.4 .8 175* 1.2 2.1 57
Windy Peak 7900 1.5 .2 750* 1.4 1.5 93
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Basin Index (%) 205* 93
S. PLATTE
Crow Creek 8330 1.4 .0 * 1.9 1.7 112
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Basin Index (%) * 112
LITTLE SNAKE RIVER
Battle Mountain 7440 .2 .0 * .6 1.7 35
Divide Peak 8880 1.0 1.1 91* 1.6 2.8 57
Elk River 8700 1.1 .0 * .1 2.2 5
Elkhead Divide 8780 .7 -M * 1.0 -M *
Little Snake River 8915 .7 .7 100* 2.1 4.1 51
Old Battle 10000 1.1 2.3 48* 1.3 3.6 36
Sage Creek Basin 7850 .7 .0 * .4 2.0 20
Sandstone RS 8150 .7 .0 * .7 1.9 37
Whiskey Park 8950 1.1 .6 183* 1.6 2.4 67
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Basin Index (%) 140* 41
UPPER GREEN RIVER
Big Sandy Opening 9080 .4 1.1 36* .7 1.6 44
Blind Bull Sum 8650 .4 1.0 40* 1.2 1.7 71
East Rim Divide 7930 .6 .0 * 1.6 1.1 145
Elkhart Park G.S. 9400 .4 .7 57* .4 1.6 25
Gros Ventre Summit 8750 .4 1.6 25 1.5 1.5 100
Gunsight Pass 9820 .8 .8 100* 1.2 1.9 63
Indian Creek 9425 .3 1.5 20* 1.0 1.9 53
Kendall R.S. 7740 .7 .0 * 1.4 1.3 108
Larsen Creek 9000 .0 .0 * .6 -M *
Loomis Park 8240 .6 .3 200* 1.5 1.5 100
New Fork Lake 8340 .4 .3 133* 1.2 1.2 100
Pocket Creek 9360 -M -M * .5 -M *
Snider Basin 8060 .1 .0 * 1.1 1.2 92
Spring Creek Divide 9000 .5 .9 56* 1.4 1.9 74
Triple Peak 8500 .8 .8 100* 2.1 2.0 105
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Basin Index (%) 71* 80
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 1.1 -M *
Buck Pasture 9632 .6 -M * 1.4 -M *
EF Blacks Fork GS 9360 .3 -M * 1.2 -M *
Hams Fork 7840 .2 .0 * .7 1.2 58
Henrys Fork 10182 -M -M * .9 -M *
Hewinta 9500 .0 .0 * 1.2 1.8 67
Hickerson Park 9122 .2 .0 * .8 1.7 47
Hole-in-Rock 9168 .0 .0 * .9 1.8 50
Indian Creek 9425 .3 1.5 20* 1.0 1.9 53
Kelley R.S. 8180 .6 .4 150* .7 1.6 44
Spirit Lk 10235 .4 -M * .6 -M *
Steel Creek Park 10158 .4 1.2 33* 1.4 2.1 67
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Basin Index (%) 55* 55
UPPER BEAR RIVER
Bear River RS 8777 .3 -M * 1.2 -M *
Bug Lake 7987 .0 .0 * .9 1.9 47
Burts Miller Ranch 8000 .3 -M * 1.0 -M *
Chalk Creek #1 9171 .5 1.2 42* 1.3 2.8 46
Dry Bread Pond 8302 .0 .0 * 1.0 2.0 50
Giveout 6930 .0 .0 * .9 1.3 69
Hayden Fork 9130 .3 .0 * 1.1 2.2 50
Kelley R.S. 8180 .6 .4 150* .7 1.6 44
Lily Lake 9133 -M .5 * -M 2.2 *
Monte Cristo 8932 .6 .0 * 1.0 2.5 40
Salt River Summit 7640 .3 .0 * .8 1.5 53
Spring Creek Divide 9000 .5 .9 56* 1.4 1.9 74
Trial Lake 9992 .6 .8 75* .5 2.5 20
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Basin Index (%) 103* 48
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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.
