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 FRIDAY: FEBRUARY 2 , 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 12.0 10.9 110 13.7 14.2 96
Black Bear 8170 26.7 23.4 114 25.7 25.2 102
Blind Bull Sum 8650 19.5 14.0 139 12.1 13.0 93
Cottonwood Creek 7670 13.5 13.1 103 15.5 16.1 96
East Rim Divide 7930 7.1 6.8 104 7.2 7.8 92
Grand Targhee 9260 31.4 23.7 132 19.8 20.8 95
Granite Creek 6770 10.4 10.7 97 13.2 13.8 96
Grassy Lake 7265 19.1 20.5 93 22.8 24.3 94
Gros Ventre Summit 8750 9.6 8.5 113 9.1 8.3 110
Gunsight Pass 9820 9.5 8.3 114 9.9 8.9 111
Lewis Lake Divide 7850 22.2 20.1 110 24.9 23.4 106
Phillips Bench 8200 14.4 16.0 90 15.8 18.4 86
Salt River Summit 7640 6.2 7.9 78 8.1 10.8 75
Snake River Station 6920 11.6 11.0 105 15.9 15.7 101
Spring Creek Divide 9000 15.8 14.6 108 15.4 15.6 99
Thumb Divide 7980 11.9 9.6 124 12.8 12.3 104
Togwotee Pass 9580 19.7 15.1 130 20.2 16.0 126
Two Ocean Plateau 9240 25.4 17.8 143 18.8 17.5 107
Willow Creek 8080 19.3 17.3 112 22.2 21.9 101
Younts Peak 8350 -M 9.7 * -M 10.6 *
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Basin Index (%) 113 100
MADISON-GALLATIN
Black Bear 8170 26.7 23.4 114 25.7 25.2 102
Canyon 7870 11.0 8.2 134 12.7 10.9 117
Madison Plateau 7750 16.3 14.1 116 17.2 17.5 98
West Yellowstone 6700 8.3 7.0 119 11.1 9.8 113
Whiskey Creek 6800 9.9 9.6 103 12.0 13.4 90
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Basin Index (%) 116 102
YELLOWSTONE
Beartooth Lake 9360 24.3 14.0 174 22.3 13.0 172
Burnt Mtn 5880 3.8 2.4 158 9.4 7.9 119
Canyon 7870 11.0 8.2 134 12.7 10.9 117
Cole Creek 7850 9.6 8.4 114 6.2 7.7 81
Evening Star 9200 25.4 16.5 154 27.0 18.1 149
Fisher Creek 9100 33.2 20.8 160 28.7 21.0 137
Northeast Entrance 7350 7.6 6.5 117 11.0 8.4 131
Parker Peak 9400 21.8 13.2 165 19.0 11.5 165
Sylvan Lake 8420 15.5 13.1 118 17.3 15.0 115
Thumb Divide 7980 11.9 9.6 124 12.8 12.3 104
Two Ocean Plateau 9240 25.4 17.8 143 18.8 17.5 107
White Mill 8700 25.6 14.8 173 18.5 15.6 119
Wolverine 7650 11.5 7.1 162 13.8 8.3 166
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Basin Index (%) 149 130
WIND RIVER
Burroughs Creek 8750 9.6 -M * 11.5 -M *
Castle Creek 8400 5.4 -M * 6.7 -M *
Cold Springs 9630 6.1 4.6 133 6.5 6.2 105
Deer Park 9700 7.3 9.4 78 9.4 12.4 76
Hobbs Park 10100 11.1 8.0 139 9.3 7.8 119
Kirwin 9550 12.6 5.9 214 11.3 7.3 155
Little Warm 9370 10.6 6.4 166 10.7 8.2 130
Owl Creek 8975 2.8 3.1 90 4.3 3.6 119
South Pass 9040 7.3 9.1 80 5.2 11.1 47
St. Lawrence Alt 8620 2.3 4.2 55 6.0 5.3 113
Togwotee Pass 9580 19.7 15.1 130 20.2 16.0 126
Townsend Creek 8700 4.8 5.3 91 6.0 7.1 85
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Basin Index (%) 119 105
BIGHORN BASIN
Bald Mtn. 9380 12.6 10.9 116 8.4 10.8 78
Bear Trap Meadow 8200 5.2 3.4 153 6.3 5.2 121
Bone Springs Div 9350 10.9 9.9 110 8.0 9.7 82
Grave Springs 8550 4.3 4.9 88 3.5 6.5 54
Kirwin 9550 12.6 5.9 214 11.3 7.3 155
Marquette 8760 4.1 -M * 7.3 -M *
Middle Powder 7760 5.7 6.4 89 -M 7.4 *
Owl Creek 8975 2.8 3.1 90 4.3 3.6 119
Powder River Pass 9480 9.8 6.6 148 8.4 7.9 106
Shell Creek 9580 12.5 9.2 136 8.8 9.0 98
Timber Creek 7950 2.3 2.9 79 -M 4.5 *
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Basin Index (%) 125 98
SHOSHONE RIVER
Blackwater 9780 22.9 14.8 155 20.7 13.4 154
Evening Star 9200 25.4 16.5 154 27.0 18.1 149
Marquette 8760 4.1 -M * 7.3 -M *
Sylvan Road 7120 9.3 7.9 118 13.8 12.0 115
Younts Peak 8350 -M 9.7 * -M 10.6 *
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Basin Index (%) 147 141
POWDER RIVER
Bear Trap Meadow 8200 5.2 3.4 153 6.3 5.2 121
Cloud Peak Reservoir 9860 9.5 8.4 113 8.5 8.0 106
Grave Springs 8550 4.3 4.9 88 3.5 6.5 54
Hansen Sawmill 8360 4.4 4.0 110 5.7 5.1 112
Middle Powder 7760 5.7 6.4 89 -M 7.4 *
Powder River Pass 9480 9.8 6.6 148 8.4 7.9 106
Soldier Park 8720 2.9 -M * 5.8 -M *
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Basin Index (%) 115 99
TONGUE RIVER
Big Goose 7990 4.3 4.9 88 4.8 6.6 73
Bone Springs Div 9350 10.9 9.9 110 8.0 9.7 82
Burgess Junction 7880 5.2 6.7 78 4.4 7.6 58
Dome Lake 8880 7.3 6.9 106 6.5 8.4 77
Little Goose 8870 5.3 -M * 7.3 -M *
Sucker Creek 8880 5.8 7.1 82 -M 8.8 *
Tie Creek 6870 2.1 3.4 62 5.3 7.2 74
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Basin Index (%) 92 73
BELLE FOURCHE
Cole Canyon 5910 3.8 3.2 119 5.5 5.7 96
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Basin Index (%) 119 96
CHEYENNE RIVER BASIN
Blind Park 6890 4.6 4.7 98 6.8 7.8 87
North Rapid Creek 6130 4.8 4.3 112 5.1 6.3 81
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Basin Index (%) 104 84
UPPER N. PLATTE
Arapaho Ridge 10960 12.0 13.3 90 12.0 14.2 85
Blackhall Mtn 9820 15.7 -M * 16.1 -M *
Columbine 9160 11.7 14.8 79 14.2 16.5 86
Divide Peak 8880 8.5 12.4 69 11.9 13.7 87
Joe Wright 10120 10.2 13.0 78 18.0 16.2 111
Laprele Creek 8375 4.2 5.4 78 5.7 7.5 76
Med Bow 10500 25.5 -M * 21.6 -M *
North French Creek 10130 17.2 16.1 107 17.6 17.0 104
Never Summer 10280 11.0 12.7 87 9.3 -M *
Old Battle 10000 14.8 19.2 77 14.5 22.6 64
Rawah 9020 6.8 6.3 108 10.0 9.1 110
Sage Creek Basin 7850 5.9 8.5 69 7.2 10.0 72
Sand Lake 10050 16.3 16.6 98 13.5 15.2 89
South Brush Creek 8440 6.1 7.4 82 7.8 9.6 81
Tower 10500 18.4 27.8 66 19.2 25.7 75
Webber Springs 9250 10.7 13.9 77 13.1 17.1 77
Willow Creek Pass 9540 8.3 7.7 108 9.1 8.4 108
Zirkel 9340 12.7 18.7 68 17.6 19.2 92
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Basin Index (%) 82 86
SWEETWATER
Deer Park 9700 7.3 9.4 78 9.4 12.4 76
Larsen Creek 9000 4.8 7.4 65 7.3 -M *
South Pass 9040 7.3 9.1 80 5.2 11.1 47
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Basin Index (%) 75 62
LOWER N. PLATTE
Casper Mtn. 7900 5.2 7.6 68 -M 9.1 *
Laprele Creek 8375 4.2 5.4 78 5.7 7.5 76
Reno Hill 8400 6.5 7.7 84 7.4 8.9 83
Windy Peak 7900 4.0 4.2 95 5.5 6.4 86
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Basin Index (%) 80 82
LARAMIE RIVER
Brooklyn Lake 10240 14.6 12.0 122 15.5 13.0 119
Cinnabar Park 9574 14.9 13.3 112 17.3 16.1 107
Crow Creek 8330 1.8 5.7 32 7.3 6.4 114
Deadman Hill 10220 12.2 10.2 120 12.0 10.3 117
Rawah 9020 6.8 6.3 108 10.0 9.1 110
Roach 9700 8.7 10.0 87 11.3 11.9 95
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Basin Index (%) 103 110
S. PLATTE
Black Mountain 8920 5.9 -M * 8.5 -M *
Crow Creek 8330 1.8 5.7 32 7.3 6.4 114
Deadman Hill 10220 12.2 10.2 120 12.0 10.3 117
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Basin Index (%) 88 116
LITTLE SNAKE RIVER
Battle Mountain 7440 3.3 7.1 46 6.4 9.7 66
Divide Peak 8880 8.5 12.4 69 11.9 13.7 87
Elk River 8700 8.3 11.4 73 9.8 12.8 77
Little Snake River 8915 11.4 15.7 73 16.8 20.9 80
Old Battle 10000 14.8 19.2 77 14.5 22.6 64
Sage Creek Basin 7850 5.9 8.5 69 7.2 10.0 72
Sandstone RS 8150 5.0 8.1 62 5.3 12.1 44
Whiskey Park 8950 12.4 16.2 77 15.3 18.0 85
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Basin Index (%) 71 73
UPPER GREEN RIVER
Big Sandy Opening 9080 8.2 8.3 99 8.4 8.4 100
Blind Bull Sum 8650 19.5 14.0 139 12.1 13.0 93
East Rim Divide 7930 7.1 6.8 104 7.2 7.8 92
Elkhart Park G.S. 9400 7.5 7.5 100 7.5 8.6 87
Gros Ventre Summit 8750 9.6 8.5 113 9.1 8.3 110
Gunsight Pass 9820 9.5 8.3 114 9.9 8.9 111
Kendall R.S. 7740 8.9 7.8 114 9.7 9.4 103
Loomis Park 8240 9.9 9.6 103 10.6 11.4 93
New Fork Lake 8340 7.2 6.8 106 -M 7.1 *
Pocket Creek 9360 6.1 -M * 5.6 -M *
Snider Basin 8060 7.4 7.6 97 9.2 9.3 99
Spring Creek Divide 9000 15.8 14.6 108 15.4 15.6 99
Triple Peak 8500 16.0 13.5 119 18.0 16.3 110
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Basin Index (%) 112 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.7 -M * 6.0 -M *
Buck Pasture 9632 7.3 -M * 8.0 -M *
EF Blacks Fork GS 9360 5.3 -M * 4.3 -M *
Hams Fork 7840 5.2 7.2 72 5.7 7.3 78
Hewinta 9500 5.1 5.8 88 7.3 8.7 84
Hickerson Park 9122 4.5 3.8 118 4.2 6.2 68
Hole-in-Rock 9168 3.9 4.0 98 4.5 5.8 78
Indian Creek 9425 12.7 14.7 86 9.7 14.2 68
Kelley R.S. 8180 7.7 9.1 85 8.9 11.7 76
Spirit Lk 10235 5.0 -M * 5.8 -M *
Steel Creek Park 10158 7.9 8.8 90 8.6 10.0 86
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Basin Index (%) 88 77
UPPER BEAR RIVER
Bear River RS 8777 5.4 -M * 6.9 -M *
Bug Lake 7987 9.4 11.0 85 10.3 12.5 82
Burts Miller Ranch 8000 3.6 -M * 4.6 -M *
Chalk Creek #1 9171 9.0 13.4 67 9.8 15.8 62
Hayden Fork 9130 7.4 8.7 85 9.6 13.2 73
Kelley R.S. 8180 7.7 9.1 85 8.9 11.7 76
Lily Lake 9133 6.8 7.4 92 7.2 10.8 67
Monte Cristo 8932 12.2 16.0 76 12.4 16.5 75
Salt River Summit 7640 6.2 7.9 78 8.1 10.8 75
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Basin Index (%) 80 73
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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.