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 26 , 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 7.5 6.6 114 10.9 9.1 120
Black Bear 8170 -M 15.8 * -M 16.2 *
Blind Bull Sum 8650 -M 8.3 * -M 8.5 *
Cottonwood Creek 7670 7.1 7.7 92 9.1 10.2 89
East Rim Divide 7930 -M 3.9 * -M 5.0 *
Grand Targhee 9260 17.2 16.3 106 13.4 14.1 95
Granite Creek 6770 -M 5.5 * -M 8.5 *
Grassy Lake 7265 13.1 11.1 118 17.3 15.4 112
Gros Ventre Summit 8750 5.3 5.5 96 5.4 5.6 96
Gunsight Pass 9820 5.6 5.2 108 6.9 5.8 119
Lewis Lake Divide 7850 -M 11.8 * -M 15.3 *
Phillips Bench 8200 9.0 9.7 93 12.4 11.6 107
Salt River Summit 7760 -M 4.3 * -M 6.8 *
Snake River Station 6920 7.5 5.6 134 12.4 10.0 124
Spring Creek Divide 9000 8.8 8.7 101 8.8 9.9 89
Thumb Divide 7980 6.4 5.6 114 8.5 7.9 108
Togwotee Pass 9580 9.0 10.2 88 11.5 10.6 108
Two Ocean Plateau 9240 12.7 11.5 110 12.2 11.6 105
Willow Creek 8380 8.8 9.8 90 12.1 14.3 85
Younts Peak 8350 5.2 6.4 81 5.5 7.0 79
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Basin Index (%) 103 102
MADISON-GALLATIN
Black Bear 8170 -M 15.8 * -M 16.2 *
Canyon 7870 5.5 4.8 115 7.5 7.2 104
Madison Plateau 7750 -M 9.5 * -M 11.1 *
West Yellowstone 6700 5.7 4.1 139 7.8 6.4 122
Whiskey Creek 6800 -M 5.8 * -M 8.9 *
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Basin Index (%) 126* 112*
YELLOWSTONE
Beartooth Lake 9360 8.3 9.1 91 8.8 8.4 105
Burnt Mtn 5880 1.9 1.9 100 6.4 6.4 100
Canyon 7870 5.5 4.8 115 7.5 7.2 104
Cole Creek 7850 3.4 6.0 57 4.3 6.2 69
Evening Star 9200 12.0 10.2 118 14.0 12.2 115
Fisher Creek 9100 14.1 13.7 103 13.1 13.8 95
Northeast Entrance 7350 3.7 3.3 112 6.4 5.7 112
Parker Peak 9400 9.3 9.0 103 10.7 7.9 135
Sylvan Lake 8420 7.9 8.5 93 11.8 10.4 113
Thumb Divide 7980 6.4 5.6 114 8.5 7.9 108
Two Ocean Plateau 9240 12.7 11.5 110 12.2 11.6 105
White Mill 8700 11.3 9.0 126 11.3 10.4 109
Wolverine 7650 6.2 4.3 144 6.9 5.8 119
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Basin Index (%) 106 107
WIND RIVER
Burroughs Creek 8750 5.3 -M * 6.5 -M *
Castle Creek 8400 2.4 -M * 3.5 -M *
Cold Springs 9630 3.0 3.0 100 3.7 4.7 79
Deer Park 9700 5.2 6.0 87 5.0 8.0 62
Hobbs Park 10100 4.5 6.1 74 4.4 5.8 76
Kirwin 9550 4.3 4.2 102 5.3 5.2 102
Little Warm 9370 4.0 4.1 98 5.5 5.8 95
Owl Creek 8975 1.4 2.4 58 1.8 2.7 67
South Pass 9040 4.2 6.0 70 3.6 7.7 47
St. Lawrence Alt 8620 1.1 2.8 39 2.7 4.1 66
Togwotee Pass 9580 9.0 10.2 88 11.5 10.6 108
Townsend Creek 8700 2.4 3.7 65 3.0 5.6 54
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Basin Index (%) 81 77
BIGHORN BASIN
Bald Mtn. 9380 3.3 7.6 43 3.7 7.4 50
Bear Trap Meadow 8200 2.0 2.5 80 2.4 4.1 59
Bone Springs Div 9350 4.2 6.9 61 4.0 6.8 59
Grave Springs 8550 1.7 3.0 57 1.8 4.7 38
Kirwin 9550 4.3 4.2 102 5.3 5.2 102
Marquette 8760 2.2 -M * 5.6 -M *
Middle Powder 7760 2.7 4.7 57 -M 5.8 *
Owl Creek 8975 1.4 2.4 58 1.8 2.7 67
Powder River Pass 9480 2.3 4.3 53 2.2 5.6 39
Shell Creek 9580 3.5 6.9 51 3.6 6.2 58
Timber Creek 7950 1.7 2.0 85 5.3 3.8 139
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Basin Index (%) 61 65
SHOSHONE RIVER
Blackwater 9780 10.6 9.8 108 12.2 9.3 131
Evening Star 9200 12.0 10.2 118 14.0 12.2 115
Marquette 8760 2.2 -M * 5.6 -M *
Sylvan Road 7120 4.6 4.9 94 8.7 8.4 104
Younts Peak 8350 5.2 6.4 81 5.5 7.0 79
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Basin Index (%) 104 109
POWDER RIVER
Bear Trap Meadow 8200 2.0 2.5 80 2.4 4.1 59
Cloud Peak Reservoir 9860 2.8 5.7 49 -M 6.0 *
Grave Springs 8550 1.7 3.0 57 1.8 4.7 38
Hansen Sawmill 8360 2.1 2.7 78 2.5 3.9 64
Middle Powder 7760 2.7 4.7 57 -M 5.8 *
Powder River Pass 9480 2.3 4.3 53 2.2 5.6 39
Soldier Park 8720 .7 -M * 2.4 -M *
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Basin Index (%) 59 49
TONGUE RIVER
Big Goose 7990 1.7 3.5 49 2.2 5.1 43
Bone Springs Div 9350 4.2 6.9 61 4.0 6.8 59
Burgess Junction 7880 2.3 4.4 52 3.4 5.6 61
Dome Lake 8880 1.7 5.0 34 -M 6.4 *
Little Goose 8870 2.1 -M * 3.0 -M *
Sucker Creek 8880 2.5 4.8 52 -M 6.4 *
Tie Creek 6870 .3 1.7 18 -M 5.3 *
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Basin Index (%) 48 55*
BELLE FOURCHE
Cole Canyon 5910 1.3 1.6 81 3.5 4.5 78
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Basin Index (%) 81 78
CHEYENNE RIVER BASIN
Blind Park 6890 1.5 2.8 54 3.0 5.7 53
North Rapid Creek 6130 2.5 2.9 86 2.7 4.7 57
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Basin Index (%) 70 55
UPPER N. PLATTE
Arapaho Ridge 10960 11.6 8.8 132 12.3 10.1 122
Blackhall Mtn 9820 12.6 -M * 13.3 -M *
Columbine 9160 9.2 8.1 114 10.3 10.8 95
Divide Peak 8880 7.3 7.6 96 9.8 9.7 101
Joe Wright 10120 5.8 9.0 64 10.9 11.5 95
Laprele Creek 8375 2.6 3.6 72 3.9 5.6 70
Med Bow 10500 13.2 -M * 13.1 -M *
North French Creek 10130 9.4 10.7 88 9.9 11.2 88
Never Summer 10280 8.3 8.1 102 8.2 -M *
Old Battle 10000 11.6 11.8 98 11.0 15.1 73
Rawah 9020 5.8 3.9 149 8.6 7.0 123
Sage Creek Basin 7850 5.4 5.1 106 5.1 6.7 76
Sand Lake 10050 11.4 10.6 108 11.3 10.6 107
South Brush Creek 8440 3.6 4.4 82 4.9 6.8 72
Tower 10500 14.0 18.2 77 14.2 17.1 83
Webber Springs 9250 9.2 8.9 103 9.9 11.5 86
Willow Creek Pass 9540 7.5 5.1 147 7.7 6.1 126
Zirkel 9340 10.7 8.8 122 13.1 12.5 105
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Basin Index (%) 101 94
SWEETWATER
Deer Park 9700 5.2 6.0 87 5.0 8.0 62
Larsen Creek 9000 2.5 4.4 57 5.4 -M *
South Pass 9040 4.2 6.0 70 3.6 7.7 47
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Basin Index (%) 73 55
LOWER N. PLATTE
Casper Mtn. 7900 4.1 5.4 76 4.9 7.1 69
Laprele Creek 8375 2.6 3.6 72 3.9 5.6 70
Reno Hill 8400 5.0 5.4 93 7.2 6.7 107
Windy Peak 7900 3.0 3.0 100 4.3 4.9 88
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Basin Index (%) 84 84
LARAMIE RIVER
Brooklyn Lake 10240 9.7 7.4 131 9.9 8.6 115
Cinnabar Park 9574 8.4 7.9 106 10.1 10.5 96
Crow Creek 8330 3.5 4.0 88 6.6 5.2 127
Deadman Hill 10220 8.8 6.8 129 9.1 7.3 125
Rawah 9020 5.8 3.9 149 8.6 7.0 123
Roach 9700 7.8 6.5 120 9.2 8.4 110
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Basin Index (%) 121 114
S. PLATTE
Black Mountain 8920 6.4 -M * 9.1 -M *
Crow Creek 8330 3.5 4.0 88 6.6 5.2 127
Deadman Hill 10220 8.8 6.8 129 9.1 7.3 125
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Basin Index (%) 114 126
LITTLE SNAKE RIVER
Battle Mountain 7440 4.9 3.5 140 -M 6.6 *
Divide Peak 8880 7.3 7.6 96 9.8 9.7 101
Elk River 8700 7.2 6.0 120 8.6 8.5 101
Little Snake River 8915 -M 7.9 * -M 13.7 *
Old Battle 10000 11.6 11.8 98 11.0 15.1 73
Sage Creek Basin 7850 5.4 5.1 106 5.1 6.7 76
Sandstone RS 8150 4.8 4.1 117 4.5 8.0 56
Whiskey Park 8950 8.9 8.7 102 10.1 11.2 90
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Basin Index (%) 107 83
UPPER GREEN RIVER
Big Sandy Opening 9080 3.7 5.2 71 4.7 5.8 81
Blind Bull Sum 8650 -M 8.3 * -M 8.5 *
East Rim Divide 7930 -M 3.9 * -M 5.0 *
Elkhart Park G.S. 9400 3.9 5.1 76 6.4 5.9 108
Gros Ventre Summit 8750 5.3 5.5 96 5.4 5.6 96
Gunsight Pass 9820 5.6 5.2 108 6.9 5.8 119
Kendall R.S. 7740 4.9 4.3 114 6.7 5.9 114
Loomis Park 8240 5.4 5.7 95 7.5 7.4 101
New Fork Lake 8340 4.4 4.1 107 5.9 4.7 126
Pocket Creek 9360 4.1 -M * 4.7 -M *
Snider Basin 8060 -M 4.7 * -M 6.0 *
Spring Creek Divide 9000 8.8 8.7 101 8.8 9.9 89
Triple Peak 8500 8.8 7.6 116 10.6 10.0 106
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Basin Index (%) 99 103
LOWER GREEN RIVER
Blacks Fork Jct 8870 -M -M * -M -M *
Buck Pasture 9700 -M -M * -M -M *
EF Blacks Fork GS 9360 -M -M * -M -M *
Hams Fork 7840 4.3 4.1 105 3.5 4.8 73
Hewinta 9519 4.4 3.4 129 -M 6.1 *
Hickerson Park 9145 4.5 2.5 180 4.9 4.7 104
Hole-in-Rock 9150 -M 2.8 * -M 4.4 *
Indian Creek 9425 7.6 9.6 79 5.6 9.0 62
Kelley R.S. 8180 5.2 5.7 91 6.3 7.7 82
Spirit Lk 10235 -M -M * -M -M *
Steel Creek Park 10200 6.4 5.9 108 8.8 7.1 124
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Basin Index (%) 104 87*
UPPER BEAR RIVER
Bear River RS 8777 -M -M * -M -M *
Bug Lake 7950 -M 5.8 * -M 8.3 *
Burts Miller Ranch 8000 -M -M * -M -M *
Chalk Creek #1 8993 -M 9.4 * -M 10.8 *
Hayden Fork 9212 -M 5.0 * -M 8.9 *
Kelley R.S. 8180 5.2 5.7 91 6.3 7.7 82
Lily Lake 9156 -M 4.8 * -M 7.6 *
Monte Cristo 8960 -M 9.3 * -M 10.8 *
Salt River Summit 7760 -M 4.3 * -M 6.8 *
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Basin Index (%) 91* 82*
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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.
