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: JANUARY 4 , 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 6.0 7.5 80 6.4 10.4 62
Black Bear 8170 12.6 18.5 68 12.7 18.8 68
Blind Bull Sum 8650 9.6 9.5 101 6.0 9.8 61
Cottonwood Creek 7670 10.7 8.8 122 11.0 11.7 94
East Rim Divide 7930 4.9 4.6 107 4.2 5.7 74
Grand Targhee 9260 18.2 18.0 101 11.5 15.4 75
Granite Creek 6770 5.9 6.8 87 6.3 9.9 64
Grassy Lake 7265 10.1 13.5 75 17.2 17.9 96
Gros Ventre Summit 8750 4.7 6.4 73 4.6 6.4 72
Gunsight Pass 9820 5.9 6.4 92 6.1 6.7 91
Lewis Lake Divide 7850 8.6 13.8 62 11.3 17.7 64
Phillips Bench 8200 11.0 11.5 96 11.0 13.6 81
Salt River Summit 7640 5.4 5.1 106 6.2 7.9 78
Snake River Station 6920 6.4 6.9 93 8.2 11.6 71
Spring Creek Divide 9000 9.4 10.6 89 9.5 11.4 83
Thumb Divide 7980 5.5 6.5 85 6.4 9.3 69
Togwotee Pass 9580 11.5 11.4 101 10.8 12.0 90
Two Ocean Plateau 9240 11.7 13.0 90 9.3 13.3 70
Willow Creek 8080 11.0 11.5 96 13.3 16.3 82
Younts Peak 8350 7.5 7.1 106 4.8 8.2 59
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Basin Index (%) 89 76
MADISON-GALLATIN
Black Bear 8170 12.6 18.5 68 12.7 18.8 68
Canyon 7870 5.5 5.8 95 5.6 8.2 68
Madison Plateau 7750 8.3 10.5 79 7.7 13.1 59
West Yellowstone 6700 4.4 4.9 90 3.4 7.4 46
Whiskey Creek 6800 6.2 7.1 87 7.4 10.3 72
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Basin Index (%) 79 64
YELLOWSTONE
Beartooth Lake 9360 10.2 10.3 99 9.3 9.5 98
Burnt Mtn 5880 1.7 1.9 89 6.6 6.9 96
Canyon 7870 5.5 5.8 95 5.6 8.2 68
Cole Creek 7850 7.3 6.4 114 6.1 6.5 94
Evening Star 9200 12.1 12.1 100 13.7 13.7 100
Fisher Creek 9100 13.2 15.7 84 14.1 15.7 90
Northeast Entrance 7350 4.6 4.4 105 5.8 6.4 91
Parker Peak 9400 11.5 10.3 112 10.5 8.9 118
Sylvan Lake 8420 9.0 9.6 94 10.4 11.6 90
Thumb Divide 7980 5.5 6.5 85 6.4 9.3 69
Two Ocean Plateau 9240 11.7 13.0 90 9.3 13.3 70
White Mill 8700 11.2 10.4 108 8.8 11.8 75
Wolverine 7650 7.0 5.1 137 6.8 6.4 106
Younts Peak 8350 7.5 7.1 106 4.8 8.2 59
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Basin Index (%) 99 87
WIND RIVER
Burroughs Creek 8750 5.2 -M * 6.8 -M *
Castle Creek 8400 2.9 -M * 3.7 -M *
Cold Springs 9630 3.8 3.3 115 3.8 5.1 75
Deer Park 9700 5.7 6.6 86 5.1 9.5 54
Hobbs Park 10100 5.8 6.8 85 5.6 6.4 88
Kirwin 9550 6.6 4.5 147 5.2 5.8 90
Little Warm 9370 5.9 4.7 126 4.0 6.4 62
Owl Creek 8975 2.9 2.7 107 3.4 2.9 117
South Pass 9040 4.7 6.8 69 4.0 8.6 47
St. Lawrence Alt 8620 2.9 3.2 91 3.7 4.4 84
Togwotee Pass 9580 11.5 11.4 101 10.8 12.0 90
Townsend Creek 8700 4.5 4.2 107 4.8 5.9 81
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Basin Index (%) 100 75
BIGHORN BASIN
Bald Mtn. 9380 11.0 8.9 124 8.5 8.2 104
Bear Trap Meadow 8200 5.1 2.6 196 5.9 4.3 137
Bone Springs Div 9350 8.3 7.5 111 6.4 7.4 86
Grave Springs 8550 5.5 3.6 153 6.9 5.3 130
Kirwin 9550 6.6 4.5 147 5.2 5.8 90
Marquette 8760 3.9 -M * 4.9 -M *
Middle Powder 7760 6.2 5.1 122 7.1 6.2 115
Owl Creek 8975 2.9 2.7 107 3.4 2.9 117
Powder River Pass 9480 6.8 5.0 136 6.8 6.1 111
Shell Creek 9580 -M 7.3 * -M 6.7 *
Timber Creek 7950 3.5 2.2 159 4.0 3.9 103
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Basin Index (%) 133 108
SHOSHONE RIVER
Blackwater 9780 10.4 10.9 95 9.8 10.3 95
Evening Star 9200 12.1 12.1 100 13.7 13.7 100
Marquette 8760 3.9 -M * 4.9 -M *
Sylvan Lake 8420 9.0 9.6 94 10.4 11.6 90
Sylvan Road 7120 5.4 5.8 93 9.2 9.4 98
Younts Peak 8350 7.5 7.1 106 4.8 8.2 59
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Basin Index (%) 98 90
POWDER RIVER
Bear Trap Meadow 8200 5.1 2.6 196 5.9 4.3 137
Cloud Peak Reservoir 9860 6.4 6.4 100 6.8 6.4 106
Grave Springs 8550 5.5 3.6 153 6.9 5.3 130
Hansen Sawmill 8360 3.5 3.1 113 4.4 4.2 105
Middle Powder 7760 6.2 5.1 122 7.1 6.2 115
Powder River Pass 9480 6.8 5.0 136 6.8 6.1 111
Soldier Park 8720 2.4 -M * 4.7 -M *
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Basin Index (%) 130 117
TONGUE RIVER
Big Goose 7990 4.0 3.8 105 5.4 5.4 100
Bone Springs Div 9350 8.3 7.5 111 6.4 7.4 86
Burgess Junction 7880 5.2 4.9 106 -M 6.0 *
Dome Lake 8880 4.8 5.6 86 4.0 6.9 58
Little Goose 8870 4.8 -M * 4.3 -M *
Sucker Creek 8880 6.6 5.4 122 5.7 6.9 83
Tie Creek 6870 3.4 2.2 155 6.4 5.8 110
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Basin Index (%) 110 86
BELLE FOURCHE
Blind Park 6890 4.1 3.4 121 5.2 6.2 84
Cole Canyon 5910 2.9 2.3 126 -M 4.7 *
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Basin Index (%) 123 84
CHEYENNE RIVER BASIN
Blind Park 6890 4.1 3.4 121 5.2 6.2 84
North Rapid Creek 6130 3.6 3.2 112 5.1 5.1 100
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Basin Index (%) 117 91
UPPER N. PLATTE
Arapaho Ridge 10960 11.1 9.9 112 11.0 11.2 98
Blackhall Mtn 9820 13.9 -M * 14.4 -M *
Columbine 9160 12.4 9.2 135 12.5 12.0 104
Divide Peak 8880 10.9 9.0 121 12.0 10.6 113
Joe Wright 10120 8.1 9.7 84 11.9 12.5 95
Laprele Creek 8375 6.7 4.1 163 7.2 6.1 118
Med Bow 10500 20.7 -M * 17.8 -M *
Never Summer 10280 8.6 9.2 93 6.4 -M *
North French Creek 10130 15.4 12.2 126 15.5 12.5 124
Old Battle 10000 15.5 13.3 117 15.3 17.0 90
Rawah 9020 -M 4.8 * -M 7.6 *
Sage Creek Basin 7850 7.9 6.2 127 6.9 7.8 88
Sand Lake 10050 13.9 12.4 112 13.1 11.6 113
South Brush Creek 8440 6.1 5.1 120 6.6 7.4 89
Tower 10500 19.6 19.0 103 18.7 19.0 98
Webber Springs 9250 11.0 10.1 109 12.1 13.0 93
Whiskey Park 8950 15.3 9.8 156 16.1 12.6 128
Willow Creek Pass 9540 5.8 5.6 104 5.5 6.7 82
Zirkel 9340 12.9 10.7 121 15.1 14.3 106
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Basin Index (%) 117 103
SWEETWATER
Deer Park 9700 5.7 6.6 86 5.1 9.5 54
Larsen Creek 9000 -M 5.1 * 3.4 -M *
South Pass 9040 4.7 6.8 69 4.0 8.6 47
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Basin Index (%) 78 50
LOWER N. PLATTE
Casper Mtn. 7900 8.5 6.1 139 6.1 7.5 81
Laprele Creek 8375 6.7 4.1 163 7.2 6.1 118
Reno Hill 8400 8.7 6.0 145 9.3 7.3 127
Windy Peak 7900 5.6 3.1 181 4.8 5.3 91
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Basin Index (%) 153 105
LARAMIE RIVER
Brooklyn Lake 10240 12.5 8.3 151 12.4 9.5 131
Cinnabar Park 9574 12.1 9.5 127 13.6 12.0 113
Crow Creek 8330 4.8 4.7 102 6.5 5.6 116
Deadman Hill 10220 9.2 7.3 126 8.0 8.0 100
Rawah 9020 -M 4.8 * -M 7.6 *
Roach 9700 7.8 7.1 110 7.4 9.2 80
Windy Peak 7900 5.6 3.1 181 4.8 5.3 91
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Basin Index (%) 130 106
S. PLATTE
Black Mountain 8920 5.8 -M * 6.9 -M *
Crow Creek 8330 4.8 4.7 102 6.5 5.6 116
Deadman Hill 10220 9.2 7.3 126 8.0 8.0 100
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Basin Index (%) 117 107
LITTLE SNAKE RIVER
Battle Mountain 7440 7.7 4.5 171 7.6 7.2 106
Divide Peak 8880 10.9 9.0 121 12.0 10.6 113
Elk River 8700 10.3 7.4 139 8.2 9.4 87
Little Snake River 8915 13.4 9.5 141 17.3 15.4 112
Old Battle 10000 15.5 13.3 117 15.3 17.0 90
Sage Creek Basin 7850 7.9 6.2 127 6.9 7.8 88
Sandstone RS 8150 9.0 4.8 188 8.4 8.9 94
Whiskey Park 8950 15.3 9.8 156 16.1 12.6 128
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Basin Index (%) 140 103
UPPER GREEN RIVER
Big Sandy Opening 9080 4.1 6.3 65 3.5 6.6 53
Blind Bull Sum 8650 9.6 9.5 101 6.0 9.8 61
East Rim Divide 7930 4.9 4.6 107 4.2 5.7 74
Elkhart Park G.S. 9400 4.6 5.8 79 4.7 6.7 70
Gros Ventre Summit 8750 4.7 6.4 73 4.6 6.4 72
Gunsight Pass 9820 5.9 6.4 92 6.1 6.7 91
Indian Creek 9425 8.8 10.2 86 7.1 10.4 68
Kendall R.S. 7740 4.2 5.1 82 4.4 6.8 65
Loomis Park 8240 5.8 6.8 85 8.1 8.5 95
New Fork Lake 8340 4.9 4.7 104 3.7 5.4 69
Pocket Creek 9360 -M -M * 3.1 -M *
Snider Basin 8060 5.3 5.5 96 5.9 6.9 86
Spring Creek Divide 9000 9.4 10.6 89 9.5 11.4 83
Triple Peak 8500 10.3 8.7 118 10.4 11.6 90
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Basin Index (%) 91 76
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.6 -M * 6.3 -M *
Buck Pasture 9632 8.9 -M * 9.0 -M *
EF Blacks Fork GS 9360 7.6 -M * 5.5 -M *
Hams Fork 7840 4.7 4.8 98 5.0 5.4 93
Hewinta 9500 5.4 4.0 135 7.7 6.6 117
Hickerson Park 9122 6.1 3.0 203 6.8 5.1 133
Hole-in-Rock 9168 6.6 3.0 220 6.9 4.8 144
Indian Creek 9425 8.8 10.2 86 7.1 10.4 68
Kelley R.S. 8180 6.6 6.4 103 7.2 8.8 82
Spirit Lk 10235 9.8 -M * 10.5 -M *
Steel Creek Park 10158 8.7 6.3 138 9.6 7.7 125
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Basin Index (%) 124 103
UPPER BEAR RIVER
Bear River RS 8777 4.3 -M * 5.7 -M *
Bug Lake 7987 9.1 6.6 138 8.9 9.4 95
Burts Miller Ranch 8000 4.0 -M * 4.1 -M *
Chalk Creek #1 9171 9.1 10.0 91 8.6 12.0 72
Hayden Fork 9130 7.0 6.2 113 9.9 10.0 99
Kelley R.S. 8180 6.6 6.4 103 7.2 8.8 82
Lily Lake 9133 5.3 5.3 100 6.4 8.3 77
Monte Cristo 8932 13.2 10.5 126 12.2 12.3 99
Salt River Summit 7640 5.4 5.1 106 6.2 7.9 78
Spring Creek Divide 9000 9.4 10.6 89 9.5 11.4 83
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Basin Index (%) 107 86
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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.
