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 THURSDAY: OCTOBER 25 , 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 * 1.6 1.6 100
Black Bear 8170 1.0 2.2 45* 3.1 3.0 103
Blind Bull Sum 8650 .0 .8 0* 2.0 1.6 125
Cottonwood Creek 7670 .2 .3 67* 2.1 2.0 105
East Rim Divide 7930 .0 .0 * 1.5 1.0 150
Grand Targhee 9260 2.2 4.0 55* 3.4 4.7 72
Granite Creek 6770 .1 .0 * 2.0 1.5 133
Grassy Lake 7265 .2 .4 50* 2.7 2.6 104
Gros Ventre Summit 8750 .2 1.3 15* 1.1 1.4 79
Gunsight Pass 9820 .0 .8 0* 2.0 1.8 111
Lewis Lake Divide 7850 .0 .3 0* 2.1 2.5 84
Phillips Bench 8200 .0 .4 0* 2.4 1.9 126
Salt River Summit 7640 .0 .0 * 2.1 1.3 162
Snake River Station 6920 .0 .0 * 2.1 2.1 100
Spring Creek Divide 9000 .4 .7 57* 2.0 1.7 118
Thumb Divide 7980 .0 .2 0* 1.4 1.8 78
Togwotee Pass 9580 1.1 2.2 50* 1.7 2.1 81
Two Ocean Plateau 9240 2.2 2.6 85* 1.9 2.4 79
Willow Creek 8080 .1 .4 25* 3.5 2.7 130
Younts Peak 8350 -M 1.1 * -M 1.8 *
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Basin Index (%) 47* 103
MADISON-GALLATIN
Black Bear 8170 1.0 2.2 45* 3.1 3.0 103
Canyon 7870 -M .3 * -M 1.5 *
Madison Plateau 7750 .0 .8 0* 2.1 2.2 95
West Yellowstone 6700 .1 .0 * 1.5 1.5 100
Whiskey Creek 6800 .0 .2 0* 1.1 1.8 61
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Basin Index (%) 34* 92
YELLOWSTONE
Beartooth Lake 9360 1.0 1.9 53* 1.0 1.8 56
Burnt Mtn 5880 .2 .0 * 2.8 2.8 100
Canyon 7870 -M .3 * -M 1.5 *
Cole Creek 7850 2.7 1.8 150 2.6 2.5 104
Evening Star 9200 1.6 1.8 89* 2.4 2.5 96
Fisher Creek 9100 1.2 1.9 63* 2.2 2.7 81
Northeast Entrance 7350 .1 .0 * 1.2 1.4 86
Parker Peak 9400 1.6 2.0 80* 2.6 2.2 118
Sylvan Lake 8420 1.0 1.2 83* 3.4 2.4 142
Thumb Divide 7980 .0 .2 0* 1.4 1.8 78
Two Ocean Plateau 9240 2.2 2.6 85* 1.9 2.4 79
White Mill 8700 .4 1.6 25* 1.4 2.2 64
Wolverine 7650 .0 .0 * 1.1 1.5 73
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Basin Index (%) 80* 92
WIND RIVER
Burroughs Creek 8750 .0 -M * 1.2 -M *
Castle Creek 8400 .0 -M * .8 -M *
Cold Springs 9630 1.1 .3 367* 1.3 1.5 87
Deer Park 9700 1.2 1.4 86* 1.8 2.4 75
Hobbs Park 10100 1.4 1.4 100* 1.7 1.9 89
Kirwin 9550 .8 1.2 67 1.0 1.5 67
Little Warm 9370 .4 .8 50* 1.6 1.5 107
Owl Creek 8975 1.2 .4 300* 1.3 1.0 130
South Pass 9040 1.0 .8 125* 1.8 1.8 100
St. Lawrence Alt 8620 .0 .3 0* 1.9 1.4 136
Togwotee Pass 9580 1.1 2.2 50* 1.7 2.1 81
Townsend Creek 8700 1.2 .4 300* 1.9 1.9 100
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Basin Index (%) 102* 94
BIGHORN BASIN
Bald Mtn. 9380 1.4 2.4 58 1.5 2.2 68
Bear Trap Meadow 8200 .7 .3 233* 1.5 1.4 107
Bone Springs Div 9350 1.5 2.0 75 1.9 2.2 86
Grave Springs 8550 .8 .6 133* 1.2 1.8 67
Kirwin 9550 .8 1.2 67 1.0 1.5 67
Marquette 8760 .2 -M * 1.1 -M *
Middle Powder 7760 .7 .6 117* 1.6 2.0 80
Owl Creek 8975 1.2 .4 300* 1.3 1.0 130
Powder River Pass 9480 .9 .9 100* 1.5 1.8 83
Shell Creek 9580 1.9 2.4 79 2.1 2.0 105
Timber Creek 7950 .2 .2 100* 1.2 1.6 75
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Basin Index (%) 92* 85
SHOSHONE RIVER
Blackwater 9780 1.7 2.1 81* 2.4 2.2 109
Evening Star 9200 1.6 1.8 89* 2.4 2.5 96
Marquette 8760 .2 -M * 1.1 -M *
Sylvan Road 7120 .0 .0 * 1.3 1.9 68
Younts Peak 8350 -M 1.1 * -M 1.8 *
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Basin Index (%) 85* 92
POWDER RIVER
Bear Trap Meadow 8200 .7 .3 233* 1.5 1.4 107
Cloud Peak Reservoir 9860 1.9 1.4 136* 1.9 2.3 83
Grave Springs 8550 .8 .6 133* 1.2 1.8 67
Hansen Sawmill 8360 .8 .2 400* 1.8 1.5 120
Middle Powder 7760 .7 .6 117* 1.6 2.0 80
Powder River Pass 9480 .9 .9 100* 1.5 1.8 83
Soldier Park 8720 .1 -M * 1.6 -M *
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Basin Index (%) 145* 88
TONGUE RIVER
Big Goose 7990 1.0 .7 143* 2.2 2.1 105
Bone Springs Div 9350 1.5 2.0 75 1.9 2.2 86
Burgess Junction 7880 1.0 .8 125* 1.9 2.0 95
Dome Lake 8880 1.4 1.2 117 2.2 2.3 96
Little Goose 8870 1.4 -M * 1.7 -M *
Sucker Creek 8880 1.7 1.1 155* 2.2 2.2 100
Tie Creek 6870 .1 .0 * 2.7 2.3 117
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Basin Index (%) 116* 100
BELLE FOURCHE
Cole Canyon 5910 .0 .0 * 1.6 1.6 100
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Basin Index (%) * 100
CHEYENNE RIVER BASIN
Blind Park 6890 .0 .0 * 1.0 1.8 56
North Rapid Creek 6130 .0 .0 * .7 1.6 44
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Basin Index (%) * 50
UPPER N. PLATTE
Arapaho Ridge 10960 2.1 2.2 95* 3.7 2.6 142
Blackhall Mtn 9820 .9 -M * 3.6 -M *
Columbine 9160 .1 .2 50* 3.1 2.1 148
Divide Peak 8880 .0 .8 0* 3.2 2.5 128
Joe Wright 10120 1.6 1.6 100* 4.4 2.8 157
Laprele Creek 8375 .0 .2 0* 1.3 1.5 87
Med Bow 10500 1.1 -M * 3.3 -M *
North French Creek 10130 .1 2.2 5* 2.6 2.6 100
Never Summer 10280 2.1 1.6 131* 3.5 -M *
Old Battle 10000 2.1 1.9 111* 4.5 3.2 141
Rawah 9020 .2 .1 200* 3.1 1.9 163
Sage Creek Basin 7850 .1 .0 * 2.5 1.9 132
Sand Lake 10050 1.1 1.9 58* 1.7 2.5 68
South Brush Creek 8440 .0 .3 0* 1.8 1.9 95
Tower 10500 2.6 2.4 108* 3.4 3.4 100
Webber Springs 9250 .7 .7 100* 3.9 2.5 156
Willow Creek Pass 9540 1.4 .6 233* 2.8 1.6 175
Zirkel 9340 .1 .4 25* 3.4 3.3 103
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Basin Index (%) 84* 125
SWEETWATER
Deer Park 9700 1.2 1.4 86* 1.8 2.4 75
Larsen Creek 9000 .0 .0 * 1.6 -M *
South Pass 9040 1.0 .8 125* 1.8 1.8 100
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Basin Index (%) 100* 86
LOWER N. PLATTE
Casper Mtn. 7900 .1 .6 17* 1.7 2.2 77
Laprele Creek 8375 .0 .2 0* 1.3 1.5 87
Reno Hill 8400 .4 1.0 40* 1.5 2.1 71
Windy Peak 7900 .2 .0 * 1.0 1.3 77
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Basin Index (%) 39* 77
LARAMIE RIVER
Brooklyn Lake 10240 .2 .8 25* 2.1 1.9 111
Cinnabar Park 9574 1.5 .9 167* 2.8 2.3 122
Crow Creek 8330 .0 .0 * 1.6 1.6 100
Deadman Hill 10220 1.5 1.6 94* 2.2 2.0 110
Rawah 9020 .2 .1 200* 3.1 1.9 163
Roach 9700 1.2 .6 200* 2.6 1.9 137
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Basin Index (%) 115* 124
S. PLATTE
Black Mountain 8920 .5 -M * 1.5 -M *
Crow Creek 8330 .0 .0 * 1.6 1.6 100
Deadman Hill 10220 1.5 1.6 94* 2.2 2.0 110
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Basin Index (%) 94* 106
LITTLE SNAKE RIVER
Battle Mountain 7440 .1 .0 * 2.5 1.5 167
Divide Peak 8880 .0 .8 0* 3.2 2.5 128
Elk River 8700 .1 .0 * 2.2 2.0 110
Little Snake River 8915 .0 .7 0* 4.8 3.8 126
Old Battle 10000 2.1 1.9 111* 4.5 3.2 141
Sage Creek Basin 7850 .1 .0 * 2.5 1.9 132
Sandstone RS 8150 .1 .0 * 2.5 1.7 147
Whiskey Park 8950 .5 .5 100* 3.8 2.2 173
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Basin Index (%) 77* 138
UPPER GREEN RIVER
Big Sandy Opening 9080 .3 .9 33* 1.8 1.5 120
Blind Bull Sum 8650 .0 .8 0* 2.0 1.6 125
East Rim Divide 7930 .0 .0 * 1.5 1.0 150
Elkhart Park G.S. 9400 1.2 .6 200* 2.4 1.5 160
Gros Ventre Summit 8750 .2 1.3 15* 1.1 1.4 79
Gunsight Pass 9820 .0 .8 0* 2.0 1.8 111
Kendall R.S. 7740 .1 .0 * 1.5 1.2 125
Loomis Park 8240 .3 .2 150* -M 1.3 *
New Fork Lake 8340 .0 .0 * 1.4 1.0 140
Pocket Creek 9360 1.2 -M * 2.5 -M *
Snyder Basin 8060 .0 .0 * 1.6 1.1 145
Spring Creek Divide 9000 .4 .7 57* 2.0 1.7 118
Triple Peak 8500 .5 .6 83* 2.2 1.8 122
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Basin Index (%) 51* 125
LOWER GREEN RIVER
Blacks Fork Jct 8869 .0 -M * 2.1 -M *
Buck Pasture 9632 .1 -M * 3.3 -M *
EF Blacks Fork GS 9360 .1 -M * 2.3 -M *
Hams Fork 7840 .0 .0 * 1.9 1.1 173
Hewinta 9500 .0 .0 * 2.3 1.7 135
Hickerson Park 9122 .2 .0 * 3.3 1.5 220
Hole-in-Rock 9168 .0 .0 * 2.8 1.6 175
Indian Creek 9425 .1 1.2 8* 1.7 1.7 100
Kelley R.S. 8180 .7 .2 350* 1.8 1.4 129
Spirit Lk 10235 1.6 -M * 4.6 -M *
Steel Creek Park 10158 .6 1.0 60* 2.6 1.8 144
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Basin Index (%) 67* 152
UPPER BEAR RIVER
Bear River RS 8777 .0 -M * 2.6 -M *
Bug Lake 7987 .0 .0 * 3.7 1.7 218
Burts Miller Ranch 8000 .1 -M * 1.6 -M *
Chalk Creek #1 9171 .2 .8 25* 5.3 2.4 221
Hayden Fork 9130 .0 .0 * 4.0 2.0 200
Kelley R.S. 8180 .7 .2 350* 1.8 1.4 129
Lily Lake 9133 .0 .5 0* 2.8 1.9 147
Monte Cristo 8932 .0 .0 * 3.2 2.2 145
Salt River Summit 7640 .0 .0 * 2.1 1.3 162
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Basin Index (%) 60* 178
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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.
