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: DECEMBER 28 , 2017
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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 8.0 6.8 118 9.9 9.4 105
Black Bear 8170 17.3 16.5 105 16.6 16.8 99
Blind Bull Sum 8650 14.2 8.6 165 8.8 8.8 100
Cottonwood Creek 7670 8.1 7.9 103 9.7 10.5 92
East Rim Divide 7930 4.6 4.1 112 5.3 5.2 102
Grand Targhee 9260 23.7 16.9 140 14.1 14.4 98
Granite Creek 6770 6.6 5.8 114 9.5 8.8 108
Grassy Lake 7265 10.9 11.7 93 14.5 15.9 91
Gros Ventre Summit 8750 8.1 5.7 142 7.4 5.8 128
Gunsight Pass 9820 7.6 5.6 136 8.1 6.0 135
Lewis Lake Divide 7850 12.5 12.4 101 15.8 15.8 100
Phillips Bench 8200 9.6 10.1 95 11.0 12.0 92
Salt River Summit 7640 3.7 4.5 82 5.7 7.0 81
Snake River Station 6920 6.4 5.8 110 10.7 10.3 104
Spring Creek Divide 9000 10.3 9.2 112 10.6 10.2 104
Thumb Divide 7980 8.2 5.8 141 9.8 8.2 120
Togwotee Pass 9580 15.7 10.4 151 15.7 10.9 144
Two Ocean Plateau 9240 19.2 11.8 163 13.6 11.9 114
Willow Creek 8080 12.6 10.0 126 15.7 14.8 106
Younts Peak 8350 -M 6.7 * -M 7.2 *
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Basin Index (%) 122 105
MADISON-GALLATIN
Black Bear 8170 17.3 16.5 105 16.6 16.8 99
Canyon 7870 6.2 5.0 124 8.0 7.4 108
Madison Plateau 7750 9.9 9.8 101 11.2 11.5 97
West Yellowstone 6700 4.8 4.3 112 7.6 6.6 115
Whiskey Creek 6800 5.6 6.0 93 7.0 9.1 77
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Basin Index (%) 105 98
YELLOWSTONE
Beartooth Lake 9360 16.4 9.4 174 14.4 8.7 166
Burnt Mtn 5880 2.6 1.9 137 8.0 6.6 121
Canyon 7870 6.2 5.0 124 8.0 7.4 108
Cole Creek 7850 7.6 6.1 125 5.6 6.3 89
Evening Star 9200 17.7 10.6 167 18.8 12.5 150
Fisher Creek 9100 22.7 14.0 162 18.9 14.2 133
Northeast Entrance 7350 4.0 3.6 111 7.5 5.8 129
Parker Peak 9400 16.0 9.3 172 13.5 8.1 167
Sylvan Lake 8420 11.8 8.8 134 12.4 10.6 117
Thumb Divide 7980 8.2 5.8 141 9.8 8.2 120
Two Ocean Plateau 9240 19.2 11.8 163 13.6 11.9 114
White Mill 8700 16.7 9.3 180 12.0 10.7 112
Wolverine 7650 6.6 4.4 150 9.6 6.0 160
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Basin Index (%) 156 130
WIND RIVER
Burroughs Creek 8750 7.0 -M * 8.3 -M *
Castle Creek 8400 4.3 -M * 5.7 -M *
Cold Springs 9630 5.0 3.0 167 5.4 4.8 112
Deer Park 9700 6.5 6.4 102 7.6 8.2 93
Hobbs Park 10100 10.2 6.2 165 8.4 6.0 140
Kirwin 9550 10.4 4.2 248 8.9 5.3 168
Little Warm 9370 9.2 4.2 219 9.0 5.9 153
Owl Creek 8975 2.4 2.4 100 4.1 2.8 146
South Pass 9040 6.0 6.2 97 4.8 7.9 61
St. Lawrence Alt 8620 2.9 2.9 100 5.6 4.2 133
Togwotee Pass 9580 15.7 10.4 151 15.7 10.9 144
Townsend Creek 8700 4.3 3.8 113 5.7 5.6 102
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Basin Index (%) 146 122
BIGHORN BASIN
Bald Mtn. 9380 9.3 7.8 119 6.1 7.6 80
Bear Trap Meadow 8200 3.8 2.5 152 5.0 4.1 122
Bone Springs Div 9350 7.3 7.0 104 5.8 6.9 84
Grave Springs 8550 2.9 3.1 94 2.8 4.9 57
Kirwin 9550 10.4 4.2 248 8.9 5.3 168
Marquette 8760 3.7 -M * 6.3 -M *
Middle Powder 7760 4.3 4.7 91 3.3 5.9 56
Owl Creek 8975 2.4 2.4 100 4.1 2.8 146
Powder River Pass 9480 7.2 4.5 160 6.0 5.7 105
Shell Creek 9580 9.6 7.0 137 6.4 6.3 102
Timber Creek 7950 2.1 2.1 100 1.9 3.8 50
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Basin Index (%) 131 94
SHOSHONE RIVER
Blackwater 9780 17.5 10.1 173 14.9 9.5 157
Evening Star 9200 17.7 10.6 167 18.8 12.5 150
Marquette 8760 3.7 -M * 6.3 -M *
Sylvan Road 7120 5.6 5.0 112 9.9 8.6 115
Younts Peak 8350 -M 6.7 * -M 7.2 *
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Basin Index (%) 159 142
POWDER RIVER
Bear Trap Meadow 8200 3.8 2.5 152 5.0 4.1 122
Cloud Peak Reservoir 9860 6.1 5.9 103 6.4 6.1 105
Grave Springs 8550 2.9 3.1 94 2.8 4.9 57
Hansen Sawmill 8360 3.2 2.8 114 4.4 4.0 110
Middle Powder 7760 4.3 4.7 91 3.3 5.9 56
Powder River Pass 9480 7.2 4.5 160 6.0 5.7 105
Soldier Park 8720 1.9 -M * 4.3 -M *
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Basin Index (%) 117 91
TONGUE RIVER
Big Goose 7990 2.9 3.5 83 3.6 5.2 69
Bone Springs Div 9350 7.3 7.0 104 5.8 6.9 84
Burgess Junction 7880 3.6 4.5 80 3.7 5.7 65
Dome Lake 8880 4.2 5.1 82 4.6 6.5 71
Little Goose 8870 3.6 -M * 5.3 -M *
Sucker Creek 8880 4.1 4.9 84 2.7 6.5 42
Tie Creek 6870 1.4 1.8 78 4.3 5.4 80
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Basin Index (%) 88 68
BELLE FOURCHE
Cole Canyon 5910 2.0 1.9 105 4.1 4.5 91
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Basin Index (%) 105 91
CHEYENNE RIVER BASIN
Blind Park 6890 2.8 3.0 93 4.9 5.8 84
North Rapid Creek 6130 3.3 3.0 110 3.6 4.8 75
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Basin Index (%) 102 80
UPPER N. PLATTE
Arapaho Ridge 10960 8.6 9.0 96 8.7 10.3 84
Blackhall Mtn 9820 11.2 -M * 11.7 -M *
Columbine 9160 5.1 8.3 61 10.4 11.1 94
Divide Peak 8880 5.7 8.0 71 9.1 9.9 92
Joe Wright 10120 7.0 9.1 77 13.3 11.7 114
Laprele Creek 8375 2.4 3.8 63 4.0 5.8 69
Med Bow 10500 16.9 -M * 14.8 -M *
North French Creek 10130 11.8 11.0 107 12.5 11.5 109
Never Summer 10280 8.1 8.3 98 7.0 -M *
Old Battle 10000 9.8 12.1 81 9.5 15.6 61
Rawah 9020 4.7 4.0 118 7.8 7.0 111
Sage Creek Basin 7850 3.8 5.4 70 5.4 6.9 78
Sand Lake 10050 12.1 11.0 110 10.3 10.8 95
South Brush Creek 8440 4.6 4.4 105 6.3 6.9 91
Tower 10500 -M 18.3 * -M 17.6 *
Webber Springs 9250 6.9 9.1 76 9.1 11.8 77
Willow Creek Pass 9540 6.6 5.3 125 7.1 6.3 113
Zirkel 9340 8.0 9.2 87 12.9 12.7 102
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Basin Index (%) 89 91
SWEETWATER
Deer Park 9700 6.5 6.4 102 7.6 8.2 93
Larsen Creek 9000 3.1 4.6 67 5.7 -M *
South Pass 9040 6.0 6.2 97 4.8 7.9 61
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Basin Index (%) 91 77
LOWER N. PLATTE
Casper Mtn. 7900 3.9 5.5 71 3.6 7.2 50
Laprele Creek 8375 2.4 3.8 63 4.0 5.8 69
Reno Hill 8400 4.7 5.6 84 5.8 6.9 84
Windy Peak 7900 2.1 3.0 70 3.8 5.0 76
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Basin Index (%) 73 69
LARAMIE RIVER
Brooklyn Lake 10240 9.9 7.5 132 11.0 8.8 125
Cinnabar Park 9574 10.5 8.3 127 12.8 10.7 120
Crow Creek 8330 1.1 4.1 27 5.8 5.3 109
Deadman Hill 10220 9.9 7.0 141 9.9 7.5 132
Rawah 9020 4.7 4.0 118 7.8 7.0 111
Roach 9700 6.8 6.7 101 9.1 8.6 106
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Basin Index (%) 114 118
S. PLATTE
Black Mountain 8920 4.5 -M * 6.9 -M *
Crow Creek 8330 1.1 4.1 27 5.8 5.3 109
Deadman Hill 10220 9.9 7.0 141 9.9 7.5 132
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Basin Index (%) 99 123
LITTLE SNAKE RIVER
Battle Mountain 7440 1.5 3.6 42 4.4 6.7 66
Divide Peak 8880 5.7 8.0 71 9.1 9.9 92
Elk River 8700 5.3 6.2 85 7.3 8.7 84
Little Snake River 8915 6.7 8.4 80 11.5 13.9 83
Old Battle 10000 9.8 12.1 81 9.5 15.6 61
Sage Creek Basin 7850 3.8 5.4 70 5.4 6.9 78
Sandstone RS 8150 3.2 4.2 76 -M 8.2 *
Whiskey Park 8950 7.3 9.0 81 10.3 11.4 90
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Basin Index (%) 76 79
UPPER GREEN RIVER
Big Sandy Opening 9080 6.1 5.4 113 6.4 5.9 108
Blind Bull Sum 8650 14.2 8.6 165 8.8 8.8 100
East Rim Divide 7930 4.6 4.1 112 5.3 5.2 102
Elkhart Park G.S. 9400 5.6 5.4 104 5.7 6.1 93
Gros Ventre Summit 8750 8.1 5.7 142 7.4 5.8 128
Gunsight Pass 9820 7.6 5.6 136 8.1 6.0 135
Kendall R.S. 7740 6.5 4.5 144 7.5 6.1 123
Loomis Park 8240 7.0 6.0 117 7.6 7.6 100
New Fork Lake 8340 5.5 4.3 128 4.6 4.9 94
Pocket Creek 9360 5.7 -M * 4.6 -M *
Snider Basin 8060 4.8 4.8 100 6.9 6.2 111
Spring Creek Divide 9000 10.3 9.2 112 10.6 10.2 104
Triple Peak 8500 11.0 7.8 141 13.1 10.3 127
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Basin Index (%) 128 111
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.4 -M * 4.6 -M *
Buck Pasture 9632 5.5 -M * 6.1 -M *
EF Blacks Fork GS 9360 3.2 -M * 4.0 -M *
Hams Fork 7840 3.3 4.3 77 4.4 4.9 90
Hewinta 9500 2.9 3.5 83 5.5 6.2 89
Hickerson Park 9122 3.0 2.6 115 2.7 4.8 56
Hole-in-Rock 9168 2.5 2.9 86 3.2 4.5 71
Indian Creek 9425 8.6 9.8 88 6.5 9.2 71
Kelley R.S. 8180 5.1 5.9 86 6.3 7.9 80
Spirit Lk 10235 3.4 -M * 3.8 -M *
Steel Creek Park 10158 6.4 6.0 107 6.4 7.2 89
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Basin Index (%) 91 78
UPPER BEAR RIVER
Bear River RS 8777 3.4 -M * 4.9 -M *
Bug Lake 7987 5.3 6.0 88 7.8 8.5 92
Burts Miller Ranch 8000 2.2 -M * 3.0 -M *
Chalk Creek #1 9171 6.3 9.5 66 7.2 11.0 65
Hayden Fork 9130 5.4 5.3 102 7.0 9.1 77
Kelley R.S. 8180 5.1 5.9 86 6.3 7.9 80
Lily Lake 9133 4.9 4.9 100 5.4 7.7 70
Monte Cristo 8932 9.0 9.6 94 9.0 11.1 81
Salt River Summit 7640 3.7 4.5 82 5.7 7.0 81
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Basin Index (%) 87 78
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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.