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: FEBRUARY 18 , 2015
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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 14.0 12.9 109 15.2 16.0 95
Black Bear 8170 23.3 27.5 85 23.3 28.4 82
Blind Bull Sum 8650 20.8 16.5 126 14.3 14.8 97
Cottonwood Creek 7670 18.5 15.2 122 21.8 18.0 121
East Rim Divide 7930 11.1 7.4 150 9.7 8.7 111
Grand Targhee 9260 30.5 27.2 112 25.0 23.6 106
Granite Creek 6770 -M 12.8 * -M 15.3 *
Grassy Lake 7265 24.6 24.5 100 24.5 27.5 89
Gros Ventre Summit 8750 10.1 9.1 111 8.3 9.3 89
Gunsight Pass 9820 10.7 9.8 109 10.4 10.1 103
Lewis Lake Divide 7850 21.2 23.7 89 22.9 26.7 86
Phillips Bench 8200 19.6 18.2 108 20.8 21.0 99
Salt River Summit 7760 9.6 9.6 100 11.4 12.3 93
Snake River Station 6920 14.0 13.4 104 16.4 17.5 94
Spring Creek Divide 9000 21.3 16.6 128 20.7 17.8 116
Thumb Divide 7980 9.1 11.0 83 9.9 13.6 73
Togwotee Pass 9580 18.8 16.7 113 20.4 18.0 113
Two Ocean Plateau 9240 21.5 19.8 109 19.3 20.0 96
Willow Creek 8380 20.8 20.0 104 23.9 24.6 97
Younts Peak 8350 -M 11.1 * -M 11.8 *
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Basin Index (%) 107 97
MADISON-GALLATIN
Black Bear 8170 23.3 27.5 85 23.3 28.4 82
Canyon 7870 9.6 9.6 100 10.5 12.2 86
Madison Plateau 7750 14.0 16.1 87 14.0 19.4 72
West Yellowstone 6700 7.0 7.9 89 8.5 10.9 78
Whiskey Creek 6800 9.2 11.1 83 10.9 15.0 73
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Basin Index (%) 87 78
YELLOWSTONE
Beartooth Lake 9360 17.6 15.5 114 16.6 14.6 114
Burnt Mtn 5880 1.8 3.7 49 8.8 8.9 99
Canyon 7870 9.6 9.6 100 10.5 12.2 86
Cole Creek 7850 8.9 8.9 100 9.2 8.5 108
Evening Star 9200 22.0 18.0 122 23.1 20.5 113
Fisher Creek 9100 26.0 23.9 109 23.9 23.6 101
Northeast Entrance 7350 9.1 7.5 121 11.8 9.3 127
Parker Peak 9400 18.4 14.4 128 17.6 13.0 135
Sylvan Lake 8420 13.7 14.6 94 16.1 16.7 96
Thumb Divide 7980 9.1 11.0 83 9.9 13.6 73
Two Ocean Plateau 9240 21.5 19.8 109 19.3 20.0 96
White Mill 8700 21.1 16.6 127 20.0 17.6 114
Wolverine 7650 10.6 8.1 131 11.6 9.3 125
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Basin Index (%) 110 106
WIND RIVER
Burroughs Creek 8750 11.5 9.8 117 13.3 11.8 113
Castle Creek 8400 7.1 -M * 7.2 -M *
Cold Springs 9630 6.0 5.3 113 6.5 6.9 94
Deer Park 9700 7.6 10.0 76 10.2 14.1 72
Hobbs Park 10100 7.0 8.8 80 7.3 8.8 83
Kirwin 9550 8.5 6.2 137 10.0 8.2 122
Little Warm 9370 7.9 7.5 105 9.1 9.1 100
Owl Creek 8975 3.7 3.4 109 5.3 4.0 132
South Pass 9040 8.1 10.4 78 8.2 12.5 66
St. Lawrence Alt 8620 2.8 4.7 60 4.4 6.0 73
Togwotee Pass 9580 18.8 16.7 113 20.4 18.0 113
Townsend Creek 8700 4.2 5.9 71 6.2 8.1 77
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Basin Index (%) 97 94
BIGHORN BASIN
Bald Mtn. 9380 12.6 13.3 95 9.6 12.0 80
Bear Trap Meadow 8200 6.4 3.9 164 5.8 5.7 102
Bone Springs Div 9350 10.8 11.0 98 9.1 10.8 84
Grave Springs 8550 6.5 5.7 114 5.6 7.3 77
Kirwin 9550 8.5 6.2 137 10.0 8.2 122
Marquette 8760 3.9 -M * 6.0 -M *
Middle Powder 7760 8.1 7.2 112 6.9 8.2 84
Owl Creek 8975 3.7 3.4 109 5.3 4.0 132
Powder River Pass 9480 8.6 7.3 118 9.3 8.8 106
Shell Creek 9580 9.6 10.3 93 9.1 9.8 93
Timber Creek 7950 4.3 3.1 139 5.9 4.9 120
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Basin Index (%) 111 96
SHOSHONE RIVER
Blackwater 9780 16.6 15.9 104 17.2 15.0 115
Evening Star 9200 22.0 18.0 122 23.1 20.5 113
Marquette 8760 3.9 -M * 6.0 -M *
Sylvan Road 7120 10.4 8.7 120 13.2 13.1 101
Younts Peak 8350 -M 11.1 * -M 11.8 *
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Basin Index (%) 115 110
POWDER RIVER
Bear Trap Meadow 8200 6.4 3.9 164 5.8 5.7 102
Cloud Peak Reservoir 9860 10.5 9.7 108 9.4 8.8 107
Grave Springs 8550 6.5 5.7 114 5.6 7.3 77
Hansen Sawmill 8360 5.6 4.4 127 6.4 5.6 114
Middle Powder 7760 8.1 7.2 112 6.9 8.2 84
Powder River Pass 9480 8.6 7.3 118 9.3 8.8 106
Soldier Park 8720 4.7 -M * 6.0 -M *
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Basin Index (%) 120 98
TONGUE RIVER
Big Goose 7990 6.1 5.8 105 6.6 7.4 89
Bone Springs Div 9350 10.8 11.0 98 9.1 10.8 84
Burgess Junction 7880 8.1 7.5 108 7.7 8.4 92
Dome Lake 8880 8.4 7.9 106 7.6 9.3 82
Little Goose 8870 6.5 -M * 8.1 -M *
Sucker Creek 8880 8.8 8.1 109 8.8 9.8 90
Tie Creek 6870 4.2 4.0 105 7.5 7.9 95
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Basin Index (%) 105 88
BELLE FOURCHE
Cole Canyon 5910 2.7 4.6 59 5.9 6.7 88
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Basin Index (%) 59 88
CHEYENNE RIVER BASIN
Blind Park 6890 4.4 5.7 77 7.1 8.8 81
North Rapid Creek 6130 5.4 5.4 100 7.3 7.1 103
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Basin Index (%) 88 91
UPPER N. PLATTE
Arapaho Ridge 10960 12.7 15.1 84 14.0 16.3 86
Blackhall Mtn 9820 16.2 -M * 19.1 -M *
Columbine 9160 15.0 17.8 84 16.3 18.8 87
Divide Peak 8880 5.2 14.3 36 9.3 15.7 59
Joe Wright 10120 12.0 15.0 80 19.3 18.3 105
Laprele Creek 8375 5.1 6.8 75 5.7 8.6 66
Med Bow 10500 23.2 -M * 21.1 -M *
North French Creek 10130 17.6 19.4 91 17.6 19.4 91
Never Summer 10280 11.5 14.4 80 11.8 -M *
Old Battle 10000 16.4 22.4 73 16.8 25.9 65
Rawah 9020 7.8 7.5 104 10.9 10.0 109
Sage Creek Basin 7850 5.5 10.0 55 -M 11.1 *
Sand Lake 10050 16.5 19.0 87 15.3 17.4 88
South Brush Creek 8440 6.2 8.8 70 7.1 10.7 66
Tower 10500 24.2 33.2 73 26.4 29.3 90
Webber Springs 9250 12.2 17.0 72 13.4 19.5 69
Willow Creek Pass 9540 6.6 8.7 76 8.6 9.4 91
Zirkel 9340 20.0 21.3 94 22.1 21.7 102
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Basin Index (%) 78 84
SWEETWATER
Deer Park 9700 7.6 10.0 76 10.2 14.1 72
Larsen Creek 9000 6.1 8.6 71 7.9 -M *
South Pass 9040 8.1 10.4 78 8.2 12.5 66
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Basin Index (%) 75 69
LOWER N. PLATTE
Casper Mtn. 7900 6.4 9.2 70 6.4 10.3 62
Laprele Creek 8375 5.1 6.8 75 5.7 8.6 66
Reno Hill 8400 7.3 9.0 81 8.5 10.3 83
Windy Peak 7900 4.8 5.2 92 4.9 7.3 67
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Basin Index (%) 78 70
LARAMIE RIVER
Brooklyn Lake 10240 14.7 14.1 104 15.7 14.8 106
Cinnabar Park 9574 11.7 16.0 73 16.7 18.5 90
Crow Creek 8330 3.3 6.5 51 6.5 7.3 89
Deadman Hill 10220 11.3 11.6 97 11.3 11.7 97
Rawah 9020 7.8 7.5 104 10.9 10.0 109
Roach 9700 8.1 11.7 69 10.9 13.5 81
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Basin Index (%) 84 95
S. PLATTE
Black Mountain 8920 6.4 -M * 8.3 -M *
Crow Creek 8330 3.3 6.5 51 6.5 7.3 89
Deadman Hill 10220 11.3 11.6 97 11.3 11.7 97
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Basin Index (%) 81 94
LITTLE SNAKE RIVER
Battle Mountain 7440 5.8 8.8 66 7.8 11.2 70
Divide Peak 8880 5.2 14.3 36 9.3 15.7 59
Elk River 8700 10.6 13.9 76 11.1 14.8 75
Little Snake River 8915 16.4 18.5 89 20.3 23.5 86
Old Battle 10000 16.4 22.4 73 16.8 25.9 65
Sage Creek Basin 7850 5.5 10.0 55 -M 11.1 *
Sandstone RS 8150 5.6 10.0 56 -M 13.9 *
Whiskey Park 8950 18.4 19.5 94 18.6 20.8 89
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Basin Index (%) 71 75
UPPER GREEN RIVER
Big Sandy Opening 9080 8.2 9.1 90 7.5 9.6 78
Blind Bull Sum 8650 20.8 16.5 126 14.3 14.8 97
East Rim Divide 7930 11.1 7.4 150 9.7 8.7 111
Elkhart Park G.S. 9400 8.7 8.7 100 9.3 9.6 97
Gros Ventre Summit 8750 10.1 9.1 111 8.3 9.3 89
Gunsight Pass 9820 10.7 9.8 109 10.4 10.1 103
Kendall R.S. 7740 10.7 9.1 118 10.2 10.6 96
Loomis Park 8240 13.1 10.7 122 13.6 12.9 105
New Fork Lake 8340 9.5 7.6 125 9.2 8.0 115
Pocket Creek 9360 6.3 -M * 4.8 -M *
Snider Basin 8060 11.7 9.1 129 13.0 10.6 123
Spring Creek Divide 9000 21.3 16.6 128 20.7 17.8 116
Triple Peak 8500 21.0 15.6 135 22.3 18.3 122
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Basin Index (%) 121 106
LOWER GREEN RIVER
Blacks Fork Jct 8870 4.5 -M * 6.7 -M *
Buck Pasture 9700 8.5 -M * 10.0 -M *
EF Blacks Fork GS 9360 5.2 -M * 6.3 -M *
Hams Fork 7840 8.5 8.5 100 7.3 8.4 87
Hewinta 9519 5.5 7.0 79 7.3 9.9 74
Hickerson Park 9145 4.6 5.2 88 5.1 7.0 73
Hole-in-Rock 9150 4.0 4.8 83 4.9 6.6 74
Indian Creek 9425 16.4 16.8 98 15.2 16.4 93
Kelley R.S. 8180 10.5 10.8 97 11.5 13.4 86
Spirit Lk 10235 5.0 -M * 7.3 -M *
Steel Creek Park 10200 -M 10.4 * 8.8 11.4 77
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Basin Index (%) 93 82
UPPER BEAR RIVER
Bear River RS 8777 5.0 -M * 5.7 -M *
Bug Lake 7950 11.5 13.4 86 10.0 14.3 70
Burts Miller Ranch 8000 3.1 -M * 2.9 -M *
Chalk Creek #1 8993 10.9 16.3 67 11.6 18.0 64
Hayden Fork 9212 5.8 11.2 52 11.1 15.1 74
Kelley R.S. 8180 10.5 10.8 97 11.5 13.4 86
Lily Lake 9156 6.3 9.2 68 7.1 12.2 58
Monte Cristo 8960 15.3 19.1 80 14.6 18.8 78
Salt River Summit 7760 9.6 9.6 100 11.4 12.3 93
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Basin Index (%) 78 74
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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.