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: JANUARY 2 , 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 5.9 7.3 81 6.3 10.2 62
Black Bear 8170 12.4 18.1 69 12.6 18.3 69
Blind Bull Sum 8650 9.3 9.2 101 5.9 9.5 62
Cottonwood Creek 7670 10.4 8.6 121 10.6 11.4 93
East Rim Divide 7930 4.7 4.4 107 4.1 5.6 73
Grand Targhee 9260 18.1 17.6 103 11.5 15.1 76
Granite Creek 6770 5.8 6.6 88 6.3 9.7 65
Grassy Lake 7265 10.1 13.0 78 17.2 17.5 98
Gros Ventre Summit 8750 4.7 6.3 75 4.7 6.2 76
Gunsight Pass 9820 5.8 6.2 94 6.1 6.6 92
Lewis Lake Divide 7850 8.4 13.5 62 11.2 17.2 65
Phillips Bench 8200 10.9 11.2 97 10.9 13.2 83
Salt River Summit 7640 5.2 5.0 104 6.1 7.7 79
Snake River Station 6920 6.4 6.5 98 8.2 11.2 73
Spring Creek Divide 9000 9.1 10.3 88 9.2 11.1 83
Thumb Divide 7980 5.3 6.3 84 6.2 9.0 69
Togwotee Pass 9580 11.2 11.2 100 10.6 11.7 91
Two Ocean Plateau 9240 11.5 12.7 91 9.1 13.0 70
Willow Creek 8080 10.8 11.1 97 13.0 15.9 82
Younts Peak 8350 7.1 7.1 100 4.7 7.9 59
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Basin Index (%) 90 77
MADISON-GALLATIN
Black Bear 8170 12.4 18.1 69 12.6 18.3 69
Canyon 7870 5.4 5.6 96 5.6 8.0 70
Madison Plateau 7750 8.2 10.4 79 7.7 12.7 61
West Yellowstone 6700 4.4 4.8 92 3.5 7.3 48
Whiskey Creek 6800 6.0 6.8 88 7.3 10.0 73
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Basin Index (%) 80 65
YELLOWSTONE
Beartooth Lake 9360 9.8 10.1 97 8.9 9.3 96
Burnt Mtn 5880 1.7 1.9 89 6.5 6.8 96
Canyon 7870 5.4 5.6 96 5.6 8.0 70
Cole Creek 7850 7.2 6.4 112 6.1 6.5 94
Evening Star 9200 11.6 11.7 99 13.0 13.4 97
Fisher Creek 9100 12.8 15.1 85 13.6 15.3 89
Northeast Entrance 7350 4.4 4.2 105 5.6 6.3 89
Parker Peak 9400 11.2 10.0 112 10.3 8.6 120
Sylvan Lake 8420 8.9 9.3 96 10.3 11.4 90
Thumb Divide 7980 5.3 6.3 84 6.2 9.0 69
Two Ocean Plateau 9240 11.5 12.7 91 9.1 13.0 70
White Mill 8700 10.9 10.1 108 8.4 11.5 73
Wolverine 7650 6.9 4.9 141 6.6 6.3 105
Younts Peak 8350 7.1 7.1 100 4.7 7.9 59
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Basin Index (%) 99 86
WIND RIVER
Burroughs Creek 8750 5.2 -M * 6.7 -M *
Castle Creek 8400 2.8 -M * 3.5 -M *
Cold Springs 9630 3.7 3.2 116 3.6 5.0 72
Deer Park 9700 5.6 6.6 85 5.0 9.2 54
Hobbs Park 10100 5.7 6.6 86 5.4 6.3 86
Kirwin 9550 6.5 4.4 148 5.1 5.7 89
Little Warm 9370 5.7 4.6 124 3.9 6.2 63
Owl Creek 8975 2.8 2.6 108 3.3 2.9 114
South Pass 9040 4.6 6.7 69 3.9 8.5 46
St. Lawrence Alt 8620 2.8 3.1 90 3.6 4.3 84
Togwotee Pass 9580 11.2 11.2 100 10.6 11.7 91
Townsend Creek 8700 4.5 4.2 107 4.7 5.8 81
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Basin Index (%) 100 75
BIGHORN BASIN
Bald Mtn. 9380 10.8 8.6 126 8.2 8.0 102
Bear Trap Meadow 8200 5.0 2.6 192 5.8 4.3 135
Bone Springs Div 9350 8.1 7.4 109 6.2 7.2 86
Grave Springs 8550 5.4 3.4 159 6.3 5.1 124
Kirwin 9550 6.5 4.4 148 5.1 5.7 89
Marquette 8760 3.8 -M * 4.8 -M *
Middle Powder 7760 6.0 5.0 120 7.0 6.1 115
Owl Creek 8975 2.8 2.6 108 3.3 2.9 114
Powder River Pass 9480 6.6 4.8 138 6.7 6.0 112
Shell Creek 9580 -M 7.3 * -M 6.6 *
Timber Creek 7950 3.6 2.2 164 4.1 3.9 105
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Basin Index (%) 134 107
SHOSHONE RIVER
Blackwater 9780 10.1 10.6 95 9.4 10.1 93
Evening Star 9200 11.6 11.7 99 13.0 13.4 97
Marquette 8760 3.8 -M * 4.8 -M *
Sylvan Lake 8420 8.9 9.3 96 10.3 11.4 90
Sylvan Road 7120 5.4 5.5 98 9.1 9.1 100
Younts Peak 8350 7.1 7.1 100 4.7 7.9 59
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Basin Index (%) 98 90
POWDER RIVER
Bear Trap Meadow 8200 5.0 2.6 192 5.8 4.3 135
Cloud Peak Reservoir 9860 6.1 6.4 95 6.7 6.3 106
Grave Springs 8550 5.4 3.4 159 6.3 5.1 124
Hansen Sawmill 8360 3.5 3.0 117 4.3 4.1 105
Middle Powder 7760 6.0 5.0 120 7.0 6.1 115
Powder River Pass 9480 6.6 4.8 138 6.7 6.0 112
Soldier Park 8720 2.2 -M * 4.5 -M *
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Basin Index (%) 129 115
TONGUE RIVER
Big Goose 7990 3.9 3.7 105 5.4 5.4 100
Bone Springs Div 9350 8.1 7.4 109 6.2 7.2 86
Burgess Junction 7880 5.1 4.8 106 -M 6.0 *
Dome Lake 8880 4.4 5.5 80 3.8 6.8 56
Little Goose 8870 4.8 -M * 4.2 -M *
Sucker Creek 8880 6.5 5.2 125 5.6 6.8 82
Tie Creek 6870 3.3 2.1 157 6.3 5.7 111
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Basin Index (%) 109 86
BELLE FOURCHE
Blind Park 6890 3.8 3.3 115 4.9 6.1 80
Cole Canyon 5910 2.7 2.3 117 -M 4.7 *
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Basin Index (%) 116 80
CHEYENNE RIVER BASIN
Blind Park 6890 3.8 3.3 115 4.9 6.1 80
North Rapid Creek 6130 3.5 3.2 109 4.8 5.1 94
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Basin Index (%) 112 87
UPPER N. PLATTE
Arapaho Ridge 10960 10.9 9.6 114 10.7 11.0 97
Blackhall Mtn 9820 13.3 -M * 13.7 -M *
Columbine 9160 11.8 8.9 133 11.9 11.7 102
Divide Peak 8880 10.6 8.6 123 11.6 10.5 110
Joe Wright 10120 8.1 9.5 85 11.7 12.2 96
Laprele Creek 8375 6.6 4.0 165 7.1 6.0 118
Med Bow 10500 19.6 -M * 17.0 -M *
Never Summer 10280 8.5 8.8 97 6.3 -M *
North French Creek 10130 14.9 11.9 125 15.0 12.2 123
Old Battle 10000 15.1 12.8 118 14.8 16.6 89
Rawah 9020 -M 4.6 * -M 7.4 *
Sage Creek Basin 7850 7.8 6.0 130 6.7 7.7 87
Sand Lake 10050 13.4 12.0 112 12.7 11.4 111
South Brush Creek 8440 6.0 4.9 122 6.3 7.3 86
Tower 10500 18.8 18.7 101 18.1 18.6 97
Webber Springs 9250 10.7 9.7 110 11.7 12.7 92
Whiskey Park 8950 14.6 9.7 151 15.4 12.4 124
Willow Creek Pass 9540 5.8 5.5 105 5.4 6.6 82
Zirkel 9340 12.5 10.2 123 14.7 13.9 106
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Basin Index (%) 117 102
SWEETWATER
Deer Park 9700 5.6 6.6 85 5.0 9.2 54
Larsen Creek 9000 -M 5.0 * 3.4 -M *
South Pass 9040 4.6 6.7 69 3.9 8.5 46
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Basin Index (%) 77 50
LOWER N. PLATTE
Casper Mtn. 7900 8.4 6.0 140 6.1 7.4 82
Laprele Creek 8375 6.6 4.0 165 7.1 6.0 118
Reno Hill 8400 8.7 5.9 147 9.2 7.2 128
Windy Peak 7900 5.5 3.1 177 4.7 5.2 90
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Basin Index (%) 154 105
LARAMIE RIVER
Brooklyn Lake 10240 12.1 8.0 151 12.0 9.4 128
Cinnabar Park 9574 12.0 9.2 130 13.4 11.7 115
Crow Creek 8330 4.8 4.6 104 6.6 5.5 120
Deadman Hill 10220 9.0 7.2 125 7.9 7.9 100
Rawah 9020 -M 4.6 * -M 7.4 *
Roach 9700 7.7 7.0 110 7.1 9.1 78
Windy Peak 7900 5.5 3.1 177 4.7 5.2 90
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Basin Index (%) 131 106
S. PLATTE
Black Mountain 8920 5.8 -M * 6.8 -M *
Crow Creek 8330 4.8 4.6 104 6.6 5.5 120
Deadman Hill 10220 9.0 7.2 125 7.9 7.9 100
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Basin Index (%) 117 108
LITTLE SNAKE RIVER
Battle Mountain 7440 7.4 4.3 172 7.2 7.1 101
Divide Peak 8880 10.6 8.6 123 11.6 10.5 110
Elk River 8700 9.7 7.0 139 7.3 9.2 79
Little Snake River 8915 12.7 9.2 138 16.5 15.1 109
Old Battle 10000 15.1 12.8 118 14.8 16.6 89
Sage Creek Basin 7850 7.8 6.0 130 6.7 7.7 87
Sandstone RS 8150 8.6 4.5 191 7.8 8.6 91
Whiskey Park 8950 14.6 9.7 151 15.4 12.4 124
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Basin Index (%) 139 100
UPPER GREEN RIVER
Big Sandy Opening 9080 4.1 6.1 67 3.5 6.4 55
Blind Bull Sum 8650 9.3 9.2 101 5.9 9.5 62
East Rim Divide 7930 4.7 4.4 107 4.1 5.6 73
Elkhart Park G.S. 9400 4.4 5.7 77 4.6 6.5 71
Gros Ventre Summit 8750 4.7 6.3 75 4.7 6.2 76
Gunsight Pass 9820 5.8 6.2 94 6.1 6.6 92
Indian Creek 9425 8.7 10.1 86 7.0 10.1 69
Kendall R.S. 7740 4.3 4.9 88 4.3 6.7 64
Loomis Park 8240 5.8 6.7 87 8.3 8.3 100
New Fork Lake 8340 4.9 4.6 107 3.5 5.2 67
Pocket Creek 9360 -M -M * 2.9 -M *
Snider Basin 8060 5.1 5.3 96 5.7 6.7 85
Spring Creek Divide 9000 9.1 10.3 88 9.2 11.1 83
Triple Peak 8500 9.8 8.4 117 9.9 11.3 88
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Basin Index (%) 91 77
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.6 -M * 6.2 -M *
Buck Pasture 9632 8.9 -M * 8.6 -M *
EF Blacks Fork GS 9360 7.5 -M * 5.5 -M *
Hams Fork 7840 4.6 4.6 100 5.1 5.3 96
Hewinta 9500 5.4 3.9 138 7.7 6.5 118
Hickerson Park 9122 6.0 2.9 207 6.8 5.0 136
Hole-in-Rock 9168 6.6 3.0 220 6.8 4.6 148
Indian Creek 9425 8.7 10.1 86 7.0 10.1 69
Kelley R.S. 8180 6.6 6.3 105 7.2 8.6 84
Spirit Lk 10235 9.7 -M * 10.4 -M *
Steel Creek Park 10158 8.6 6.2 139 9.4 7.6 124
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Basin Index (%) 126 105
UPPER BEAR RIVER
Bear River RS 8777 4.3 -M * 5.7 -M *
Bug Lake 7987 8.9 6.4 139 8.8 9.1 97
Burts Miller Ranch 8000 4.0 -M * 4.1 -M *
Chalk Creek #1 9171 9.1 9.8 93 8.6 11.7 74
Hayden Fork 9130 6.9 6.0 115 9.9 9.7 102
Kelley R.S. 8180 6.6 6.3 105 7.2 8.6 84
Lily Lake 9133 5.2 5.2 100 6.3 8.1 78
Monte Cristo 8932 13.0 10.1 129 12.1 12.0 101
Salt River Summit 7640 5.2 5.0 104 6.1 7.7 79
Spring Creek Divide 9000 9.1 10.3 88 9.2 11.1 83
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Basin Index (%) 108 87
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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.
