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: DECEMBER 9 , 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 7030 6.5 4.7 138 8.3 7.3 114
Black Bear 8170 13.5 11.3 119 12.9 12.6 102
Blind Bull Sum 8650 11.2 6.2 181 7.3 6.8 107
Cottonwood Creek 7670 5.3 5.5 96 7.0 8.0 88
East Rim Divide 7930 3.2 2.4 133 4.0 4.0 100
Grand Targhee 9260 20.7 10.4 199 12.5 10.6 118
Granite Creek 6770 4.8 3.5 137 8.0 6.5 123
Grassy Lake 7265 7.8 7.9 99 11.2 11.8 95
Gros Ventre Summit 8750 6.8 4.5 151 6.3 4.7 134
Gunsight Pass 9820 6.0 3.8 158 6.6 4.7 140
Lewis Lake Divide 7850 10.1 8.8 115 13.2 11.9 111
Phillips Bench 8200 7.4 7.1 104 9.4 9.0 104
Salt River Summit 7760 2.0 2.7 74 4.0 5.2 77
Snake River Station 6920 4.8 3.9 123 8.5 7.9 108
Spring Creek Divide 9000 7.5 6.2 121 8.1 7.7 105
Thumb Divide 7980 6.5 3.8 171 8.1 6.4 127
Togwotee Pass 9580 13.2 8.2 161 12.8 8.5 151
Two Ocean Plateau 9240 17.0 9.8 173 11.5 9.5 121
Willow Creek 8380 9.0 7.0 129 12.4 11.2 111
Younts Peak 8350 -M 4.9 * -M 5.8 *
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Basin Index (%) 139 112
MADISON-GALLATIN
Black Bear 8170 13.5 11.3 119 12.9 12.6 102
Canyon 7870 4.6 3.3 139 6.0 5.6 107
Madison Plateau 7750 7.6 6.6 115 8.9 8.7 102
West Yellowstone 6700 2.9 2.6 112 5.9 4.9 120
Whiskey Creek 6800 3.6 4.0 90 5.7 7.0 81
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Basin Index (%) 116 102
YELLOWSTONE
Beartooth Lake 9360 13.0 7.1 183 11.3 6.5 174
Burnt Mtn 5880 1.0 1.4 71 6.2 5.7 109
Canyon 7870 4.6 3.3 139 6.0 5.6 107
Cole Creek 7850 5.9 5.0 118 4.4 5.4 81
Evening Star 9200 14.7 8.2 179 15.1 9.8 154
Fisher Creek 9100 17.8 9.9 180 15.3 10.8 142
Northeast Entrance 7350 2.7 2.2 123 6.0 4.7 128
Parker Peak 9400 12.7 6.9 184 10.6 6.5 163
Sylvan Lake 8420 9.6 6.2 155 10.0 8.4 119
Thumb Divide 7980 6.5 3.8 171 8.1 6.4 127
Two Ocean Plateau 9240 17.0 9.8 173 11.5 9.5 121
White Mill 8700 13.8 6.9 200 9.6 8.3 116
Wolverine 7650 3.2 2.8 114 7.1 4.7 151
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Basin Index (%) 167 131
WIND RIVER
Burroughs Creek 8750 5.4 -M * 6.5 -M *
Castle Creek 8400 2.6 -M * 4.1 -M *
Cold Springs 9630 3.5 2.5 140 4.2 4.0 105
Deer Park 9700 5.8 4.6 126 6.6 6.6 100
Hobbs Park 10100 8.6 5.2 165 7.3 5.0 146
Kirwin 9550 8.5 3.7 230 7.1 4.5 158
Little Warm 9370 7.5 3.4 221 7.3 4.8 152
Owl Creek 8975 1.7 1.9 89 3.3 2.4 138
South Pass 9040 4.9 4.6 107 4.0 6.3 63
St. Lawrence Alt 8620 2.4 2.3 104 4.6 3.6 128
Togwotee Pass 9580 13.2 8.2 161 12.8 8.5 151
Townsend Creek 8700 3.2 2.9 110 4.5 4.8 94
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Basin Index (%) 151 122
BIGHORN BASIN
Bald Mtn. 9380 7.4 6.3 117 4.7 5.8 81
Bear Trap Meadow 8200 3.2 1.8 178 4.3 3.5 123
Bone Springs Div 9350 5.7 5.6 102 4.5 5.4 83
Grave Springs 8550 2.2 2.2 100 2.3 4.0 58
Kirwin 9550 8.5 3.7 230 7.1 4.5 158
Marquette 8760 3.0 -M * 5.4 -M *
Middle Powder 7760 3.5 3.3 106 2.8 4.8 58
Owl Creek 8975 1.7 1.9 89 3.3 2.4 138
Powder River Pass 9480 6.2 3.4 182 5.3 4.6 115
Shell Creek 9580 8.0 5.2 154 5.1 5.1 100
Timber Creek 7950 1.3 1.9 68 1.2 3.4 35
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Basin Index (%) 135 93
SHOSHONE RIVER
Blackwater 9780 14.8 7.6 195 12.2 7.5 163
Evening Star 9200 14.7 8.2 179 15.1 9.8 154
Marquette 8760 3.0 -M * 5.4 -M *
Sylvan Road 7120 4.1 3.5 117 8.0 6.8 118
Younts Peak 8350 -M 4.9 * -M 5.8 *
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Basin Index (%) 174 146
POWDER RIVER
Bear Trap Meadow 8200 3.2 1.8 178 4.3 3.5 123
Cloud Peak Reservoir 9860 4.9 4.3 114 5.7 5.1 112
Grave Springs 8550 2.2 2.2 100 2.3 4.0 58
Hansen Sawmill 8360 2.5 1.9 132 3.7 3.3 112
Middle Powder 7760 3.5 3.3 106 2.8 4.8 58
Powder River Pass 9480 6.2 3.4 182 5.3 4.6 115
Soldier Park 8720 1.5 -M * 3.8 -M *
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Basin Index (%) 133 95
TONGUE RIVER
Big Goose 7990 2.2 2.8 79 3.0 4.3 70
Bone Springs Div 9350 5.7 5.6 102 4.5 5.4 83
Burgess Junction 7880 2.6 3.4 76 2.7 4.6 59
Dome Lake 8880 3.4 4.1 83 3.8 5.4 70
Little Goose 8870 2.6 -M * 4.5 -M *
Sucker Creek 8880 3.2 3.7 86 -M 5.2 *
Tie Creek 6870 .7 1.0 70 3.4 4.5 76
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Basin Index (%) 86 72
BELLE FOURCHE
Cole Canyon 5910 1.4 1.1 127 3.3 3.9 85
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Basin Index (%) 127 85
CHEYENNE RIVER BASIN
Blind Park 6890 2.4 1.9 126 4.2 4.8 88
North Rapid Creek 6130 2.6 1.9 137 3.0 4.0 75
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Basin Index (%) 132 82
UPPER N. PLATTE
Arapaho Ridge 10960 5.8 6.5 89 6.2 8.3 75
Blackhall Mtn 9820 7.8 -M * 8.4 -M *
Columbine 9160 3.0 5.4 56 7.2 8.2 88
Divide Peak 8880 3.7 5.4 69 7.0 7.6 92
Joe Wright 10120 4.8 6.7 72 10.5 9.1 115
Laprele Creek 8375 1.8 2.5 72 3.3 4.5 73
Med Bow 10500 11.5 -M * -M -M *
North French Creek 10130 8.2 8.1 101 9.0 8.7 103
Never Summer 10280 6.1 5.8 105 6.1 -M *
Old Battle 10000 7.3 8.9 82 6.9 11.6 59
Rawah 9020 3.5 3.0 117 6.5 5.6 116
Sage Creek Basin 7850 2.1 3.1 68 3.9 5.2 75
Sand Lake 10050 8.9 8.2 109 7.9 8.3 95
South Brush Creek 8440 3.4 3.1 110 4.9 5.4 91
Tower 10500 9.0 13.2 68 10.7 13.3 80
Webber Springs 9250 4.7 6.1 77 6.9 8.9 78
Willow Creek Pass 9540 5.2 3.9 133 5.3 5.0 106
Zirkel 9340 4.8 5.6 86 9.5 9.9 96
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Basin Index (%) 86 88
SWEETWATER
Deer Park 9700 5.8 4.6 126 6.6 6.6 100
Larsen Creek 9000 2.1 3.1 68 4.2 -M *
South Pass 9040 4.9 4.6 107 4.0 6.3 63
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Basin Index (%) 104 82
LOWER N. PLATTE
Casper Mtn. 7900 2.9 3.9 74 2.9 5.9 49
Laprele Creek 8375 1.8 2.5 72 3.3 4.5 73
Reno Hill 8400 3.9 4.3 91 4.9 5.5 89
Windy Peak 7900 1.3 2.1 62 3.0 4.0 75
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Basin Index (%) 77 71
LARAMIE RIVER
Brooklyn Lake 10240 5.4 5.1 106 7.1 6.7 106
Cinnabar Park 9574 6.6 6.2 106 8.7 8.1 107
Crow Creek 8330 .1 3.2 3 4.4 4.1 107
Deadman Hill 10220 7.5 5.1 147 7.9 5.9 134
Rawah 9020 3.5 3.0 117 6.5 5.6 116
Roach 9700 4.8 4.6 104 7.0 6.5 108
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Basin Index (%) 103 113
S. PLATTE
Black Mountain 8920 3.6 -M * 5.8 -M *
Crow Creek 8330 .1 3.2 3 4.4 4.1 107
Deadman Hill 10220 7.5 5.1 147 7.9 5.9 134
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Basin Index (%) 92 123
LITTLE SNAKE RIVER
Battle Mountain 7440 .8 2.2 36 2.4 5.2 46
Divide Peak 8880 3.7 5.4 69 7.0 7.6 92
Elk River 8700 3.5 3.9 90 6.0 6.5 92
Little Snake River 8915 4.0 4.5 89 8.5 10.6 80
Old Battle 10000 7.3 8.9 82 6.9 11.6 59
Sage Creek Basin 7850 2.1 3.1 68 3.9 5.2 75
Sandstone RS 8150 1.7 2.7 63 3.0 6.2 48
Whiskey Park 8950 4.8 6.3 76 7.7 8.6 90
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Basin Index (%) 75 74
UPPER GREEN RIVER
Big Sandy Opening 9080 4.1 4.0 102 4.6 4.7 98
Blind Bull Sum 8650 11.2 6.2 181 7.3 6.8 107
East Rim Divide 7930 3.2 2.4 133 4.0 4.0 100
Elkhart Park G.S. 9400 3.7 3.8 97 4.1 4.8 85
Gros Ventre Summit 8750 6.8 4.5 151 6.3 4.7 134
Gunsight Pass 9820 6.0 3.8 158 6.6 4.7 140
Kendall R.S. 7740 4.2 3.1 135 5.2 4.7 111
Loomis Park 8240 5.0 3.8 132 5.8 5.7 102
New Fork Lake 8340 3.3 2.7 122 3.0 3.8 79
Pocket Creek 9360 4.6 -M * 3.8 -M *
Snider Basin 8060 2.1 3.1 68 4.8 4.6 104
Spring Creek Divide 9000 7.5 6.2 121 8.1 7.7 105
Triple Peak 8500 8.0 5.7 140 10.3 8.0 129
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Basin Index (%) 132 109
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.9 -M * 3.1 -M *
Buck Pasture 9632 3.2 -M * 4.3 -M *
EF Blacks Fork GS 9360 2.2 -M * 3.1 -M *
Hams Fork 7840 1.5 2.8 54 3.2 3.8 84
Hewinta 9500 1.0 2.2 45 3.5 5.1 69
Hickerson Park 9122 2.2 1.7 129 1.8 4.1 44
Hole-in-Rock 9168 1.5 1.9 79 2.2 3.9 56
Indian Creek 9425 6.6 6.7 99 5.4 7.0 77
Kelley R.S. 8180 3.3 3.7 89 4.4 5.9 75
Spirit Lk 10235 2.3 -M * 2.6 -M *
Steel Creek Park 10158 4.4 4.8 92 4.4 5.8 76
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Basin Index (%) 86 70
UPPER BEAR RIVER
Bear River RS 8777 1.9 -M * 3.4 -M *
Bug Lake 7987 4.0 4.2 95 5.9 6.6 89
Burts Miller Ranch 8000 .3 -M * 2.0 -M *
Chalk Creek #1 9171 4.3 7.0 61 5.5 8.7 63
Hayden Fork 9130 3.0 3.5 86 4.6 7.1 65
Kelley R.S. 8180 3.3 3.7 89 4.4 5.9 75
Lily Lake 9133 2.2 3.5 63 3.6 6.2 58
Monte Cristo 8932 6.4 6.8 94 6.6 8.5 78
Salt River Summit 7760 2.0 2.7 74 4.0 5.2 77
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Basin Index (%) 80 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.