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 WEDNESDAY: JANUARY 17 , 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 10.6 9.7 109 12.3 12.3 100
Black Bear 8170 -M 20.9 * -M 21.7 *
Blind Bull Sum 8650 17.1 12.3 139 10.8 11.3 96
Cottonwood Creek 7670 11.6 10.6 109 13.3 13.9 96
East Rim Divide 7930 6.1 5.7 107 6.6 6.8 97
Grand Targhee 9260 28.5 21.2 134 17.1 18.0 95
Granite Creek 6770 9.1 8.7 105 12.1 11.8 103
Grassy Lake 7265 14.6 16.7 87 18.1 20.9 87
Gros Ventre Summit 8750 9.3 7.5 124 8.7 7.3 119
Gunsight Pass 9820 9.0 7.4 122 9.4 7.8 121
Lewis Lake Divide 7850 17.2 16.6 104 20.0 20.4 98
Phillips Bench 8200 12.7 15.0 85 14.3 16.0 89
Salt River Summit 7640 4.9 6.4 77 7.0 9.3 75
Snake River Station 6920 9.0 9.1 99 13.3 13.5 99
Spring Creek Divide 9000 13.2 12.2 108 13.2 13.6 97
Thumb Divide 7980 10.2 8.0 128 11.3 10.8 105
Togwotee Pass 9580 18.2 13.0 140 18.5 14.1 131
Two Ocean Plateau 9240 22.5 15.5 145 16.5 15.4 107
Willow Creek 8080 16.6 14.3 116 19.4 19.0 102
Younts Peak 8350 -M 8.5 * -M 9.4 *
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Basin Index (%) 115 100
MADISON-GALLATIN
Black Bear 8170 -M 20.9 * -M 21.7 *
Canyon 7870 9.2 7.3 126 10.7 9.4 114
Madison Plateau 7750 12.7 12.5 102 13.9 15.2 91
West Yellowstone 6700 6.5 6.3 103 9.3 8.4 111
Whiskey Creek 6800 7.3 8.4 87 9.6 11.7 82
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Basin Index (%) 103 97
YELLOWSTONE
Beartooth Lake 9360 21.5 12.5 172 19.7 11.3 174
Burnt Mtn 5880 3.2 2.2 145 8.5 7.4 115
Canyon 7870 9.2 7.3 126 10.7 9.4 114
Cole Creek 7850 8.2 7.2 114 5.7 7.1 80
Evening Star 9200 23.1 14.1 164 24.6 15.9 155
Fisher Creek 9100 29.3 18.4 159 25.1 18.2 138
Northeast Entrance 7350 6.4 5.4 119 9.7 7.3 133
Parker Peak 9400 19.5 11.6 168 -M 10.1 *
Sylvan Lake 8420 14.0 11.2 125 15.3 13.2 116
Thumb Divide 7980 10.2 8.0 128 11.3 10.8 105
Two Ocean Plateau 9240 22.5 15.5 145 16.5 15.4 107
White Mill 8700 22.5 12.8 176 16.4 13.7 120
Wolverine 7650 9.9 6.0 165 12.4 7.4 168
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Basin Index (%) 151 128
WIND RIVER
Burroughs Creek 8750 9.1 -M * 10.8 -M *
Castle Creek 8400 5.1 -M * 6.4 -M *
Cold Springs 9630 5.6 4.1 137 6.1 5.7 107
Deer Park 9700 7.3 7.3 100 8.7 10.9 80
Hobbs Park 10100 10.3 7.3 141 8.7 7.0 124
Kirwin 9550 11.8 5.3 223 10.5 6.6 159
Little Warm 9370 9.9 5.6 177 10.1 7.3 138
Owl Creek 8975 2.7 2.9 93 4.3 3.3 130
South Pass 9040 6.9 7.8 88 4.9 9.8 50
St. Lawrence Alt 8620 2.3 3.5 66 5.5 4.9 112
Togwotee Pass 9580 18.2 13.0 140 18.5 14.1 131
Townsend Creek 8700 4.3 4.4 98 5.4 6.5 83
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Basin Index (%) 130 109
BIGHORN BASIN
Bald Mtn. 9380 11.6 9.9 117 8.0 9.6 83
Bear Trap Meadow 8200 4.3 2.9 148 5.4 4.7 115
Bone Springs Div 9350 9.7 8.7 111 7.4 8.5 87
Grave Springs 8550 3.6 4.4 82 3.2 5.8 55
Kirwin 9550 11.8 5.3 223 10.5 6.6 159
Marquette 8760 3.7 -M * 6.7 -M *
Middle Powder 7760 5.0 6.0 83 3.6 6.7 54
Owl Creek 8975 2.7 2.9 93 4.3 3.3 130
Powder River Pass 9480 8.6 5.8 148 7.3 7.0 104
Shell Creek 9580 11.6 8.4 138 8.2 7.8 105
Timber Creek 7950 2.1 2.6 81 1.6 4.2 38
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Basin Index (%) 125 93
SHOSHONE RIVER
Blackwater 9780 20.9 13.0 161 18.5 11.8 157
Evening Star 9200 23.1 14.1 164 24.6 15.9 155
Marquette 8760 3.7 -M * 6.7 -M *
Sylvan Road 7120 7.9 6.8 116 12.2 10.7 114
Younts Peak 8350 -M 8.5 * -M 9.4 *
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Basin Index (%) 153 144
POWDER RIVER
Bear Trap Meadow 8200 4.3 2.9 148 5.4 4.7 115
Cloud Peak Reservoir 9860 8.0 7.3 110 7.5 7.1 106
Grave Springs 8550 3.6 4.4 82 3.2 5.8 55
Hansen Sawmill 8360 3.7 3.5 106 5.0 4.6 109
Middle Powder 7760 5.0 6.0 83 3.6 6.7 54
Powder River Pass 9480 8.6 5.8 148 7.3 7.0 104
Soldier Park 8720 2.7 -M * 5.5 -M *
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Basin Index (%) 111 89
TONGUE RIVER
Big Goose 7990 3.5 4.3 81 4.2 5.9 71
Bone Springs Div 9350 9.7 8.7 111 7.4 8.5 87
Burgess Junction 7880 4.4 5.9 75 4.1 6.8 60
Dome Lake 8880 6.0 6.2 97 5.7 7.6 75
Little Goose 8870 4.4 -M * 6.4 -M *
Sucker Creek 8880 5.0 6.4 78 -M 7.8 *
Tie Creek 6870 1.8 2.8 64 4.7 6.5 72
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Basin Index (%) 89 74
BELLE FOURCHE
Cole Canyon 5910 3.3 2.7 122 5.1 5.2 98
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Basin Index (%) 122 98
CHEYENNE RIVER BASIN
Blind Park 6890 4.0 4.1 98 6.0 7.0 86
North Rapid Creek 6130 4.3 3.7 116 4.5 5.7 79
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Basin Index (%) 106 83
UPPER N. PLATTE
Arapaho Ridge 10960 10.4 11.2 93 10.2 12.9 79
Blackhall Mtn 9820 13.8 -M * 14.2 -M *
Columbine 9160 5.1 12.5 41 -M 14.2 *
Divide Peak 8880 7.3 10.5 70 10.8 12.1 89
Joe Wright 10120 8.8 11.4 77 15.8 14.2 111
Laprele Creek 8375 3.3 5.0 66 4.7 6.8 69
Med Bow 10500 22.1 -M * 18.9 -M *
North French Creek 10130 15.5 14.0 111 15.9 14.8 107
Never Summer 10280 9.1 10.6 86 7.9 -M *
Old Battle 10000 12.7 15.8 80 12.2 19.7 62
Rawah 9020 6.0 5.5 109 8.8 8.5 104
Sage Creek Basin 7850 4.8 7.3 66 6.5 8.7 75
Sand Lake 10050 14.6 14.5 101 12.3 13.4 92
South Brush Creek 8440 5.7 6.2 92 7.2 8.5 85
Tower 10500 16.2 22.9 71 17.1 22.3 77
Webber Springs 9250 8.9 12.0 74 11.2 14.9 75
Willow Creek Pass 9540 7.1 6.3 113 7.6 7.4 103
Zirkel 9340 10.8 15.9 68 15.9 16.7 95
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Basin Index (%) 81 86
SWEETWATER
Deer Park 9700 7.3 7.3 100 8.7 10.9 80
Larsen Creek 9000 4.4 6.1 72 7.0 -M *
South Pass 9040 6.9 7.8 88 4.9 9.8 50
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Basin Index (%) 88 66
LOWER N. PLATTE
Casper Mtn. 7900 4.4 6.8 65 -M 8.2 *
Laprele Creek 8375 3.3 5.0 66 4.7 6.8 69
Reno Hill 8400 5.5 6.7 82 6.6 8.1 81
Windy Peak 7900 2.7 3.7 73 4.3 5.8 74
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Basin Index (%) 72 75
LARAMIE RIVER
Brooklyn Lake 10240 12.9 10.9 118 13.8 11.2 123
Cinnabar Park 9574 13.1 11.7 112 15.6 14.3 109
Crow Creek 8330 1.4 5.1 27 -M 6.0 *
Deadman Hill 10220 10.5 8.3 127 10.5 9.1 115
Rawah 9020 6.0 5.5 109 8.8 8.5 104
Roach 9700 7.6 8.8 86 10.2 10.5 97
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Basin Index (%) 102 110
S. PLATTE
Black Mountain 8920 4.6 -M * 7.2 -M *
Crow Creek 8330 1.4 5.1 27 -M 6.0 *
Deadman Hill 10220 10.5 8.3 127 10.5 9.1 115
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Basin Index (%) 89 115*
LITTLE SNAKE RIVER
Battle Mountain 7440 2.6 5.7 46 4.9 8.6 57
Divide Peak 8880 7.3 10.5 70 10.8 12.1 89
Elk River 8700 7.5 9.4 80 9.1 11.2 81
Little Snake River 8915 9.3 12.4 75 14.6 17.9 82
Old Battle 10000 12.7 15.8 80 12.2 19.7 62
Sage Creek Basin 7850 4.8 7.3 66 6.5 8.7 75
Sandstone RS 8150 4.5 6.9 65 4.7 10.5 45
Whiskey Park 8950 10.6 13.5 79 13.4 15.3 88
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Basin Index (%) 73 73
UPPER GREEN RIVER
Big Sandy Opening 9080 7.7 7.0 110 7.8 7.4 105
Blind Bull Sum 8650 17.1 12.3 139 10.8 11.3 96
East Rim Divide 7930 6.1 5.7 107 6.6 6.8 97
Elkhart Park G.S. 9400 6.9 6.5 106 6.9 7.6 91
Gros Ventre Summit 8750 9.3 7.5 124 8.7 7.3 119
Gunsight Pass 9820 9.0 7.4 122 9.4 7.8 121
Kendall R.S. 7740 8.4 6.6 127 9.3 8.1 115
Loomis Park 8240 9.0 7.9 114 9.7 9.9 98
New Fork Lake 8340 6.6 5.7 116 -M 6.2 *
Pocket Creek 9360 6.2 -M * 5.4 -M *
Snider Basin 8060 6.3 6.4 98 8.1 8.1 100
Spring Creek Divide 9000 13.2 12.2 108 13.2 13.6 97
Triple Peak 8500 13.9 11.4 122 15.8 13.9 114
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Basin Index (%) 117 104
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.5 -M * 5.0 -M *
Buck Pasture 9632 6.0 -M * 6.8 -M *
EF Blacks Fork GS 9360 3.2 -M * 3.7 -M *
Hams Fork 7840 4.4 5.8 76 5.1 6.4 80
Hewinta 9500 3.8 4.9 78 5.9 7.6 78
Hickerson Park 9122 3.2 3.2 100 2.7 5.6 48
Hole-in-Rock 9168 2.8 3.4 82 3.3 5.2 63
Indian Creek 9425 11.1 12.5 89 8.6 12.3 70
Kelley R.S. 8180 6.7 7.5 89 7.8 10.2 76
Spirit Lk 10235 3.5 -M * 4.2 -M *
Steel Creek Park 10158 7.1 7.4 96 7.2 8.8 82
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Basin Index (%) 87 72
UPPER BEAR RIVER
Bear River RS 8777 3.9 -M * 5.5 -M *
Bug Lake 7987 7.7 8.7 89 8.9 10.9 82
Burts Miller Ranch 8000 2.0 -M * 3.4 -M *
Chalk Creek #1 9171 7.3 11.7 62 8.3 13.8 60
Hayden Fork 9130 6.2 7.3 85 8.1 11.5 70
Kelley R.S. 8180 6.7 7.5 89 7.8 10.2 76
Lily Lake 9133 5.6 6.5 86 5.8 9.5 61
Monte Cristo 8932 10.6 13.7 77 10.7 14.4 74
Salt River Summit 7640 4.9 6.4 77 7.0 9.3 75
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Basin Index (%) 79 71
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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.