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 MONDAY: JANUARY 15 , 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 10.7 9.5 113 12.4 12.0 103
Black Bear 8170 -M 20.5 * -M 21.2 *
Blind Bull Sum 8650 17.2 12.2 141 10.8 11.1 97
Cottonwood Creek 7670 11.6 10.2 114 13.4 13.7 98
East Rim Divide 7930 6.1 5.5 111 6.6 6.6 100
Grand Targhee 9260 28.4 21.1 135 17.0 17.9 95
Granite Creek 6770 9.2 8.4 110 12.2 11.6 105
Grassy Lake 7265 14.6 16.4 89 18.5 20.4 91
Gros Ventre Summit 8750 9.3 7.4 126 8.8 7.1 124
Gunsight Pass 9820 9.0 7.3 123 9.5 7.7 123
Lewis Lake Divide 7850 17.5 16.3 107 20.1 20.0 100
Phillips Bench 8200 13.0 14.5 90 14.3 15.6 92
Salt River Summit 7640 4.9 6.1 80 7.0 9.1 77
Snake River Station 6920 9.2 8.9 103 13.5 13.2 102
Spring Creek Divide 9000 13.2 11.8 112 13.2 13.3 99
Thumb Divide 7980 10.3 7.9 130 11.4 10.5 109
Togwotee Pass 9580 18.2 12.9 141 18.5 13.8 134
Two Ocean Plateau 9240 22.6 15.4 147 16.5 15.1 109
Willow Creek 8080 16.6 13.8 120 19.4 18.6 104
Younts Peak 8350 -M 8.3 * -M 9.2 *
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Basin Index (%) 118 102
MADISON-GALLATIN
Black Bear 8170 -M 20.5 * -M 21.2 *
Canyon 7870 9.1 7.1 128 10.8 9.2 117
Madison Plateau 7750 12.8 12.0 107 14.0 14.9 94
West Yellowstone 6700 -M 6.1 * -M 8.3 *
Whiskey Creek 6800 7.6 8.2 93 9.8 11.5 85
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Basin Index (%) 108 97
YELLOWSTONE
Beartooth Lake 9360 21.6 12.3 176 19.8 11.0 180
Burnt Mtn 5880 3.0 2.1 143 8.4 7.3 115
Canyon 7870 9.1 7.1 128 10.8 9.2 117
Cole Creek 7850 8.3 7.1 117 5.6 6.9 81
Evening Star 9200 23.1 14.0 165 24.7 15.6 158
Fisher Creek 9100 29.4 18.0 163 24.9 17.9 139
Northeast Entrance 7350 6.3 5.2 121 9.8 7.2 136
Parker Peak 9400 19.6 11.4 172 -M 9.9 *
Sylvan Lake 8420 14.1 11.1 127 15.3 13.0 118
Thumb Divide 7980 10.3 7.9 130 11.4 10.5 109
Two Ocean Plateau 9240 22.6 15.4 147 16.5 15.1 109
White Mill 8700 22.3 12.5 178 16.5 13.4 123
Wolverine 7650 9.9 5.8 171 -M 7.2 *
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Basin Index (%) 154 129
WIND RIVER
Burroughs Creek 8750 9.1 -M * 11.0 -M *
Castle Creek 8400 5.1 -M * 6.5 -M *
Cold Springs 9630 5.6 3.9 144 6.1 5.6 109
Deer Park 9700 7.3 7.2 101 8.8 10.8 81
Hobbs Park 10100 10.5 7.2 146 8.7 6.9 126
Kirwin 9550 12.0 5.2 231 10.7 6.5 165
Little Warm 9370 10.0 5.5 182 10.1 7.1 142
Owl Creek 8975 2.6 2.9 90 4.2 3.2 131
South Pass 9040 6.9 7.6 91 5.0 9.6 52
St. Lawrence Alt 8620 2.4 3.4 71 5.6 4.8 117
Togwotee Pass 9580 18.2 12.9 141 18.5 13.8 134
Townsend Creek 8700 4.3 4.3 100 5.6 6.4 88
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Basin Index (%) 133 112
BIGHORN BASIN
Bald Mtn. 9380 11.6 9.8 118 7.8 9.4 83
Bear Trap Meadow 8200 4.3 2.9 148 5.2 4.6 113
Bone Springs Div 9350 9.7 8.5 114 7.3 8.4 87
Grave Springs 8550 3.5 4.3 81 2.9 5.7 51
Kirwin 9550 12.0 5.2 231 10.7 6.5 165
Marquette 8760 3.6 -M * 6.7 -M *
Middle Powder 7760 4.8 5.9 81 3.4 6.6 52
Owl Creek 8975 2.6 2.9 90 4.2 3.2 131
Powder River Pass 9480 8.6 5.7 151 7.3 6.9 106
Shell Creek 9580 11.6 8.2 141 8.1 7.6 107
Timber Creek 7950 2.2 2.5 88 1.7 4.2 40
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Basin Index (%) 127 93
SHOSHONE RIVER
Blackwater 9780 21.0 12.9 163 18.6 11.6 160
Evening Star 9200 23.1 14.0 165 24.7 15.6 158
Marquette 8760 3.6 -M * 6.7 -M *
Sylvan Road 7120 7.7 6.5 118 12.3 10.5 117
Younts Peak 8350 -M 8.3 * -M 9.2 *
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Basin Index (%) 155 147
POWDER RIVER
Bear Trap Meadow 8200 4.3 2.9 148 5.2 4.6 113
Cloud Peak Reservoir 9860 8.1 7.2 112 7.6 7.0 109
Grave Springs 8550 3.5 4.3 81 2.9 5.7 51
Hansen Sawmill 8360 3.7 3.5 106 5.0 4.5 111
Middle Powder 7760 4.8 5.9 81 3.4 6.6 52
Powder River Pass 9480 8.6 5.7 151 7.3 6.9 106
Soldier Park 8720 2.7 -M * 5.6 -M *
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Basin Index (%) 112 89
TONGUE RIVER
Big Goose 7990 3.5 4.3 81 4.0 5.9 68
Bone Springs Div 9350 9.7 8.5 114 7.3 8.4 87
Burgess Junction 7880 4.4 5.7 77 4.0 6.6 61
Dome Lake 8880 6.1 6.0 102 5.5 7.5 73
Little Goose 8870 4.4 -M * 6.3 -M *
Sucker Creek 8880 4.9 6.3 78 -M 7.6 *
Tie Creek 6870 1.7 2.6 65 4.6 6.4 72
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Basin Index (%) 91 73
BELLE FOURCHE
Cole Canyon 5910 3.2 2.6 123 4.8 5.1 94
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Basin Index (%) 123 94
CHEYENNE RIVER BASIN
Blind Park 6890 3.9 4.0 98 6.0 6.9 87
North Rapid Creek 6130 4.1 3.7 111 4.3 5.6 77
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Basin Index (%) 104 82
UPPER N. PLATTE
Arapaho Ridge 10960 10.4 11.1 94 10.4 12.8 81
Blackhall Mtn 9820 13.9 -M * 14.3 -M *
Columbine 9160 5.5 12.2 45 12.1 13.9 87
Divide Peak 8880 7.3 10.2 72 10.8 11.9 91
Joe Wright 10120 9.1 11.1 82 15.8 14.0 113
Laprele Creek 8375 3.3 4.8 69 4.6 6.7 69
Med Bow 10500 22.3 -M * 18.9 -M *
North French Creek 10130 15.6 13.8 113 16.0 14.5 110
Never Summer 10280 9.3 10.5 89 8.0 -M *
Old Battle 10000 12.8 15.5 83 12.4 19.3 64
Rawah 9020 5.8 5.4 107 8.9 8.4 106
Sage Creek Basin 7850 4.9 7.2 68 6.5 8.6 76
Sand Lake 10050 14.9 14.3 104 12.4 13.1 95
South Brush Creek 8440 5.7 6.0 95 7.3 8.3 88
Tower 10500 16.2 22.4 72 17.3 21.9 79
Webber Springs 9250 9.0 11.8 76 11.2 14.6 77
Willow Creek Pass 9540 7.1 6.2 115 7.7 7.4 104
Zirkel 9340 10.8 15.6 69 15.9 16.5 96
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Basin Index (%) 83 88
SWEETWATER
Deer Park 9700 7.3 7.2 101 8.8 10.8 81
Larsen Creek 9000 4.5 6.0 75 7.1 -M *
South Pass 9040 6.9 7.6 91 5.0 9.6 52
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Basin Index (%) 90 68
LOWER N. PLATTE
Casper Mtn. 7900 4.3 6.7 64 3.8 8.1 47
Laprele Creek 8375 3.3 4.8 69 4.6 6.7 69
Reno Hill 8400 5.5 6.6 83 6.5 7.9 82
Windy Peak 7900 2.8 3.6 78 4.3 5.7 75
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Basin Index (%) 73 68
LARAMIE RIVER
Brooklyn Lake 10240 12.9 10.6 122 13.8 10.9 127
Cinnabar Park 9574 13.1 11.7 112 15.6 14.2 110
Crow Creek 8330 1.4 4.9 29 6.5 6.0 108
Deadman Hill 10220 10.7 8.1 132 10.5 8.9 118
Rawah 9020 5.8 5.4 107 8.9 8.4 106
Roach 9700 7.6 8.6 88 10.1 10.4 97
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Basin Index (%) 104 111
S. PLATTE
Black Mountain 8920 4.7 -M * 7.2 -M *
Crow Creek 8330 1.4 4.9 29 6.5 6.0 108
Deadman Hill 10220 10.7 8.1 132 10.5 8.9 118
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Basin Index (%) 93 114
LITTLE SNAKE RIVER
Battle Mountain 7440 2.7 5.4 50 -M 8.4 *
Divide Peak 8880 7.3 10.2 72 10.8 11.9 91
Elk River 8700 7.5 9.1 82 9.0 11.0 82
Little Snake River 8915 9.5 12.2 78 14.7 17.8 83
Old Battle 10000 12.8 15.5 83 12.4 19.3 64
Sage Creek Basin 7850 4.9 7.2 68 6.5 8.6 76
Sandstone RS 8150 4.6 6.6 70 4.5 10.3 44
Whiskey Park 8950 10.6 12.8 83 13.5 15.0 90
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Basin Index (%) 76 76
UPPER GREEN RIVER
Big Sandy Opening 9080 7.7 7.0 110 7.9 7.3 108
Blind Bull Sum 8650 17.2 12.2 141 10.8 11.1 97
East Rim Divide 7930 6.1 5.5 111 6.6 6.6 100
Elkhart Park G.S. 9400 7.0 6.3 111 7.0 7.5 93
Gros Ventre Summit 8750 9.3 7.4 126 8.8 7.1 124
Gunsight Pass 9820 9.0 7.3 123 9.5 7.7 123
Kendall R.S. 7740 8.5 6.5 131 9.3 7.9 118
Loomis Park 8240 9.1 7.7 118 9.8 9.7 101
New Fork Lake 8340 6.7 5.5 122 6.0 6.2 97
Pocket Creek 9360 6.3 -M * 5.5 -M *
Snider Basin 8060 6.2 6.3 98 8.1 8.0 101
Spring Creek Divide 9000 13.2 11.8 112 13.2 13.3 99
Triple Peak 8500 13.9 11.3 123 15.8 13.6 116
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Basin Index (%) 120 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.5 -M * 4.9 -M *
Buck Pasture 9632 6.0 -M * 6.8 -M *
EF Blacks Fork GS 9360 3.3 -M * 3.8 -M *
Hams Fork 7840 4.4 5.6 79 5.1 6.3 81
Hewinta 9500 3.7 4.9 76 5.9 7.4 80
Hickerson Park 9122 3.2 3.2 100 2.7 5.5 49
Hole-in-Rock 9168 2.7 3.3 82 3.3 5.2 63
Indian Creek 9425 11.1 12.0 92 8.6 12.0 72
Kelley R.S. 8180 6.7 7.3 92 7.8 10.0 78
Spirit Lk 10235 3.5 -M * 4.3 -M *
Steel Creek Park 10158 7.1 7.3 97 7.2 8.6 84
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Basin Index (%) 89 74
UPPER BEAR RIVER
Bear River RS 8777 4.0 -M * 5.5 -M *
Bug Lake 7987 7.4 8.5 87 8.9 10.7 83
Burts Miller Ranch 8000 2.2 -M * 3.4 -M *
Chalk Creek #1 9171 7.3 11.5 63 8.3 13.5 61
Hayden Fork 9130 6.2 7.0 89 8.0 11.3 71
Kelley R.S. 8180 6.7 7.3 92 7.8 10.0 78
Lily Lake 9133 5.5 6.4 86 5.8 9.3 62
Monte Cristo 8932 10.7 13.5 79 10.6 14.1 75
Salt River Summit 7640 4.9 6.1 80 7.0 9.1 77
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Basin Index (%) 81 72
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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.