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 27 , 2014
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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 8.0 6.7 119 9.1 9.3 98
Black Bear 8170 14.2 16.1 88 15.2 16.5 92
Blind Bull Sum 8650 13.6 8.4 162 9.9 8.6 115
Cottonwood Creek 7670 11.2 7.8 144 13.7 10.4 132
East Rim Divide 7930 7.1 4.0 178 6.7 5.1 131
Grand Targhee 9260 18.3 16.6 110 15.6 14.1 111
Granite Creek 6770 10.3 5.7 181 10.9 8.6 127
Grassy Lake 7265 13.3 11.4 117 14.1 15.6 90
Gros Ventre Summit 8750 8.1 5.6 145 6.4 5.7 112
Gunsight Pass 9820 6.9 5.4 128 6.9 5.9 117
Lewis Lake Divide 7850 12.6 12.1 104 15.2 15.6 97
Phillips Bench 8200 12.0 9.9 121 13.4 11.8 114
Salt River Summit 7760 5.7 4.4 130 7.6 6.9 110
Snake River Station 6920 9.0 5.7 158 10.9 10.2 107
Spring Creek Divide 9000 13.6 8.9 153 13.5 10.0 135
Thumb Divide 7980 5.9 5.7 104 7.1 8.0 89
Togwotee Pass 9580 11.8 10.3 115 12.9 10.7 121
Two Ocean Plateau 9240 14.0 11.6 121 12.2 11.8 103
Willow Creek 8380 12.2 9.9 123 15.4 14.5 106
Younts Peak 8350 -M 6.5 * -M 7.1 *
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Basin Index (%) 125 109
MADISON-GALLATIN
Black Bear 8170 14.2 16.1 88 15.2 16.5 92
Canyon 7870 6.0 4.9 122 6.7 7.3 92
Madison Plateau 7750 9.1 9.6 95 9.8 11.3 87
West Yellowstone 6700 3.9 4.2 93 5.5 6.4 86
Whiskey Creek 6800 5.7 5.9 97 7.3 9.0 81
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Basin Index (%) 96 88
YELLOWSTONE
Beartooth Lake 9360 11.3 9.3 122 10.7 8.5 126
Burnt Mtn 5880 3.4 1.9 179 6.2 6.6 94
Canyon 7870 6.0 4.9 122 6.7 7.3 92
Cole Creek 7850 5.6 6.0 93 4.2 6.2 68
Evening Star 9200 13.0 10.4 125 14.1 12.3 115
Fisher Creek 9100 15.0 13.8 109 14.1 14.0 101
Northeast Entrance 7350 5.6 3.4 165 8.0 5.8 138
Parker Peak 9400 11.2 9.1 123 10.8 8.0 135
Sylvan Lake 8420 7.8 8.6 91 9.9 10.5 94
Thumb Divide 7980 5.9 5.7 104 7.1 8.0 89
Two Ocean Plateau 9240 14.0 11.6 121 12.2 11.8 103
White Mill 8700 12.5 9.2 136 11.7 10.5 111
Wolverine 7650 7.2 4.4 164 7.2 5.9 122
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Basin Index (%) 121 106
WIND RIVER
Burroughs Creek 8750 7.7 5.8 133 8.7 7.2 121
Castle Creek 8400 4.8 -M * 4.9 -M *
Cold Springs 9630 3.9 3.0 130 4.0 4.7 85
Deer Park 9700 5.9 6.2 95 7.5 8.2 91
Hobbs Park 10100 5.1 6.2 82 5.5 5.9 93
Kirwin 9550 6.2 4.2 148 7.2 5.3 136
Little Warm 9370 5.4 4.2 129 6.2 5.8 107
Owl Creek 8975 2.5 2.4 104 4.3 2.8 154
South Pass 9040 5.6 6.1 92 5.9 7.9 75
St. Lawrence Alt 8620 1.9 2.9 66 3.1 4.2 74
Togwotee Pass 9580 11.8 10.3 115 12.9 10.7 121
Townsend Creek 8700 2.9 3.8 76 4.6 5.6 82
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Basin Index (%) 107 102
BIGHORN BASIN
Bald Mtn. 9380 7.6 7.7 99 5.9 7.5 79
Bear Trap Meadow 8200 3.3 2.5 132 3.3 4.1 80
Bone Springs Div 9350 6.2 7.0 89 5.3 6.8 78
Grave Springs 8550 3.3 3.1 106 3.3 4.9 67
Kirwin 9550 6.2 4.2 148 7.2 5.3 136
Marquette 8760 2.8 -M * 4.2 -M *
Middle Powder 7760 5.1 4.7 109 -M 5.9 *
Owl Creek 8975 2.5 2.4 104 4.3 2.8 154
Powder River Pass 9480 5.3 4.4 120 6.0 5.6 107
Shell Creek 9580 5.5 6.9 80 5.6 6.3 89
Timber Creek 7950 2.9 2.0 145 4.4 3.8 116
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Basin Index (%) 107 96
SHOSHONE RIVER
Blackwater 9780 11.0 10.0 110 10.4 9.4 111
Evening Star 9200 13.0 10.4 125 14.1 12.3 115
Marquette 8760 2.8 -M * 4.2 -M *
Sylvan Road 7120 6.3 5.0 126 8.7 8.5 102
Younts Peak 8350 -M 6.5 * -M 7.1 *
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Basin Index (%) 119 110
POWDER RIVER
Bear Trap Meadow 8200 3.3 2.5 132 3.3 4.1 80
Cloud Peak Reservoir 9860 6.1 5.8 105 6.2 6.0 103
Grave Springs 8550 3.3 3.1 106 3.3 4.9 67
Hansen Sawmill 8360 3.7 2.8 132 4.6 3.9 118
Middle Powder 7760 5.1 4.7 109 -M 5.9 *
Powder River Pass 9480 5.3 4.4 120 6.0 5.6 107
Soldier Park 8720 2.8 -M * 4.3 -M *
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Basin Index (%) 115 96
TONGUE RIVER
Big Goose 7990 3.6 3.5 103 4.1 5.2 79
Bone Springs Div 9350 6.2 7.0 89 5.3 6.8 78
Burgess Junction 7880 4.7 4.5 104 4.6 5.7 81
Dome Lake 8880 3.3 5.0 66 5.1 6.5 78
Little Goose 8870 4.0 -M * 5.1 -M *
Sucker Creek 8880 5.1 4.8 106 5.6 6.5 86
Tie Creek 6870 2.8 1.8 156 4.8 5.4 89
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Basin Index (%) 97 82
BELLE FOURCHE
Cole Canyon 5910 1.7 1.8 94 4.3 4.5 96
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Basin Index (%) 94 96
CHEYENNE RIVER BASIN
Blind Park 6890 2.8 2.9 97 4.6 5.7 81
North Rapid Creek 6130 3.5 2.9 121 5.1 4.8 106
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Basin Index (%) 109 92
UPPER N. PLATTE
Arapaho Ridge 10960 8.1 8.9 91 9.8 10.2 96
Blackhall Mtn 9820 10.1 -M * 13.1 -M *
Columbine 9160 9.6 8.2 117 11.5 10.9 106
Divide Peak 8880 4.5 7.8 58 6.9 9.8 70
Joe Wright 10120 8.2 9.0 91 13.7 11.6 118
Laprele Creek 8375 2.8 3.7 76 3.5 5.7 61
Med Bow 10500 13.6 -M * 13.8 -M *
North French Creek 10130 11.0 10.8 102 11.3 11.4 99
Never Summer 10280 8.1 8.2 99 9.0 -M *
Old Battle 10000 11.2 12.0 93 11.5 15.4 75
Rawah 9020 6.1 4.0 152 8.8 7.0 126
Sage Creek Basin 7850 3.5 5.2 67 4.0 6.8 59
Sand Lake 10050 10.6 10.8 98 9.5 10.6 90
South Brush Creek 8440 4.0 4.4 91 4.8 6.8 71
Tower 10500 16.0 18.3 87 17.5 17.3 101
Webber Springs 9250 7.8 9.0 87 8.0 11.7 68
Willow Creek Pass 9540 4.9 5.2 94 6.7 6.2 108
Zirkel 9340 -M 8.9 * -M 12.6 *
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Basin Index (%) 93 90
SWEETWATER
Deer Park 9700 5.9 6.2 95 7.5 8.2 91
Larsen Creek 9000 4.1 4.5 91 6.0 -M *
South Pass 9040 5.6 6.1 92 5.9 7.9 75
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Basin Index (%) 93 83
LOWER N. PLATTE
Casper Mtn. 7900 4.0 5.5 73 4.3 7.1 61
Laprele Creek 8375 2.8 3.7 76 3.5 5.7 61
Reno Hill 8400 3.9 5.5 71 5.4 6.8 79
Windy Peak 7900 2.8 3.0 93 3.0 5.0 60
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Basin Index (%) 76 66
LARAMIE RIVER
Brooklyn Lake 10240 8.5 7.4 115 9.6 8.8 109
Cinnabar Park 9574 7.8 8.1 96 10.2 10.6 96
Crow Creek 8330 3.2 4.0 80 4.6 5.3 87
Deadman Hill 10220 6.9 6.9 100 7.9 7.4 107
Rawah 9020 6.1 4.0 152 8.8 7.0 126
Roach 9700 4.8 6.6 73 7.2 8.5 85
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Basin Index (%) 101 101
S. PLATTE
Black Mountain 8920 4.4 -M * 6.3 -M *
Crow Creek 8330 3.2 4.0 80 4.6 5.3 87
Deadman Hill 10220 6.9 6.9 100 7.9 7.4 107
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Basin Index (%) 93 98
LITTLE SNAKE RIVER
Battle Mountain 7440 4.0 3.5 114 5.8 6.6 88
Divide Peak 8880 4.5 7.8 58 6.9 9.8 70
Elk River 8700 6.7 6.1 110 7.7 8.6 90
Little Snake River 8915 10.3 8.1 127 14.7 13.8 107
Old Battle 10000 11.2 12.0 93 11.5 15.4 75
Sage Creek Basin 7850 3.5 5.2 67 4.0 6.8 59
Sandstone RS 8150 4.8 4.1 117 5.4 8.1 67
Whiskey Park 8950 11.3 8.8 128 11.6 11.3 103
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Basin Index (%) 101 84
UPPER GREEN RIVER
Big Sandy Opening 9080 6.2 5.3 117 5.9 5.9 100
Blind Bull Sum 8650 13.6 8.4 162 9.9 8.6 115
East Rim Divide 7930 7.1 4.0 178 6.7 5.1 131
Elkhart Park G.S. 9400 6.1 5.2 117 7.1 6.0 118
Gros Ventre Summit 8750 8.1 5.6 145 6.4 5.7 112
Gunsight Pass 9820 6.9 5.4 128 6.9 5.9 117
Kendall R.S. 7740 7.3 4.4 166 7.3 6.0 122
Loomis Park 8240 9.3 5.9 158 9.7 7.5 129
New Fork Lake 8340 6.6 4.2 157 6.4 4.8 133
Pocket Creek 9360 5.9 -M * 4.6 -M *
Snider Basin 8060 7.6 4.8 158 8.9 6.1 146
Spring Creek Divide 9000 13.6 8.9 153 13.5 10.0 135
Triple Peak 8500 14.1 7.7 183 15.2 10.2 149
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Basin Index (%) 153 127
LOWER GREEN RIVER
Blacks Fork Jct 8870 2.6 -M * 4.7 -M *
Buck Pasture 9700 5.4 -M * 7.2 -M *
EF Blacks Fork GS 9360 3.5 -M * 4.9 -M *
Hams Fork 7840 5.6 4.2 133 5.2 4.8 108
Hewinta 9519 3.1 3.4 91 5.1 6.2 82
Hickerson Park 9145 3.5 2.6 135 4.0 4.8 83
Hole-in-Rock 9150 2.5 2.8 89 3.7 4.5 82
Indian Creek 9425 9.9 9.7 102 10.3 9.1 113
Kelley R.S. 8180 7.0 5.8 121 7.5 7.8 96
Spirit Lk 10235 4.1 -M * 5.7 -M *
Steel Creek Park 10200 4.6 6.0 77 6.2 7.1 87
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Basin Index (%) 105 95
UPPER BEAR RIVER
Bear River RS 8777 2.9 -M * 3.9 -M *
Bug Lake 7950 7.3 5.9 124 6.7 8.4 80
Burts Miller Ranch 8000 2.3 -M * 1.7 -M *
Chalk Creek #1 8993 7.2 9.4 77 7.7 11.0 70
Hayden Fork 9212 4.7 5.1 92 7.6 9.0 84
Kelley R.S. 8180 7.0 5.8 121 7.5 7.8 96
Lily Lake 9156 4.1 4.8 85 5.0 7.7 65
Monte Cristo 8960 10.4 9.4 111 9.9 11.0 90
Salt River Summit 7760 5.7 4.4 130 7.6 6.9 110
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Basin Index (%) 104 84
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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.