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 SUNDAY: DECEMBER 24 , 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 7.6 6.3 121 9.4 8.9 106
Black Bear 8170 16.6 15.2 109 15.5 15.8 98
Blind Bull Sum 8650 12.8 8.1 158 8.0 8.3 96
Cottonwood Creek 7670 6.7 7.4 91 8.2 10.0 82
East Rim Divide 7930 3.5 3.7 95 4.5 4.9 92
Grand Targhee 9260 22.8 15.5 147 13.1 13.5 97
Granite Creek 6770 5.8 5.2 112 8.9 8.2 109
Grassy Lake 7265 10.2 10.7 95 13.3 14.9 89
Gros Ventre Summit 8750 7.7 5.2 148 7.0 5.5 127
Gunsight Pass 9820 6.9 4.8 144 7.4 5.6 132
Lewis Lake Divide 7850 11.5 11.1 104 15.1 14.9 101
Phillips Bench 8200 8.6 9.3 92 10.4 11.2 93
Salt River Summit 7640 2.8 4.1 68 4.5 6.6 68
Snake River Station 6920 5.8 5.5 105 9.7 9.8 99
Spring Creek Divide 9000 8.8 8.4 105 9.2 9.6 96
Thumb Divide 7980 7.5 5.4 139 9.2 7.7 119
Togwotee Pass 9580 14.8 9.9 149 14.6 10.3 142
Two Ocean Plateau 9240 18.5 11.2 165 13.2 11.4 116
Willow Creek 8080 11.2 9.5 118 14.4 14.0 103
Younts Peak 8350 -M 6.1 * -M 6.9 *
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Basin Index (%) 121 102
MADISON-GALLATIN
Black Bear 8170 16.6 15.2 109 15.5 15.8 98
Canyon 7870 6.0 4.6 130 7.5 7.0 107
Madison Plateau 7750 9.5 9.2 103 10.6 10.8 98
West Yellowstone 6700 4.3 3.9 110 7.2 6.1 118
Whiskey Creek 6800 5.0 5.7 88 6.7 8.7 77
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Basin Index (%) 107 98
YELLOWSTONE
Beartooth Lake 9360 15.1 8.9 170 13.1 8.2 160
Burnt Mtn 5880 2.2 1.9 116 7.5 6.4 117
Canyon 7870 6.0 4.6 130 7.5 7.0 107
Cole Creek 7850 7.3 5.8 126 5.0 6.1 82
Evening Star 9200 16.3 9.9 165 17.1 11.9 144
Fisher Creek 9100 21.0 13.5 156 17.6 13.4 131
Northeast Entrance 7350 3.6 3.1 116 6.9 5.6 123
Parker Peak 9400 14.8 8.7 170 12.5 7.8 160
Sylvan Lake 8420 11.3 8.2 138 11.5 10.2 113
Thumb Divide 7980 7.5 5.4 139 9.2 7.7 119
Two Ocean Plateau 9240 18.5 11.2 165 13.2 11.4 116
White Mill 8700 15.6 8.9 175 10.9 10.2 107
Wolverine 7650 5.3 4.1 129 8.5 5.7 149
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Basin Index (%) 153 126
WIND RIVER
Burroughs Creek 8750 6.1 -M * 7.1 -M *
Castle Creek 8400 3.5 -M * 4.9 -M *
Cold Springs 9630 4.4 2.9 152 4.8 4.6 104
Deer Park 9700 6.8 5.6 121 7.2 7.8 92
Hobbs Park 10100 9.7 6.0 162 7.9 5.7 139
Kirwin 9550 9.2 4.1 224 7.7 5.1 151
Little Warm 9370 8.5 4.0 212 8.2 5.6 146
Owl Creek 8975 2.2 2.3 96 3.7 2.7 137
South Pass 9040 5.7 5.7 100 4.3 7.6 57
St. Lawrence Alt 8620 2.6 2.7 96 5.3 4.0 132
Togwotee Pass 9580 14.8 9.9 149 14.6 10.3 142
Townsend Creek 8700 3.8 3.6 106 4.8 5.4 89
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Basin Index (%) 145 116
BIGHORN BASIN
Bald Mtn. 9380 8.7 7.4 118 5.4 7.3 74
Bear Trap Meadow 8200 3.2 2.4 133 4.8 3.9 123
Bone Springs Div 9350 6.9 6.8 101 5.0 6.6 76
Grave Springs 8550 2.7 2.9 93 2.5 4.7 53
Kirwin 9550 9.2 4.1 224 7.7 5.1 151
Marquette 8760 3.3 -M * 6.1 -M *
Middle Powder 7760 3.9 4.5 87 2.7 5.8 47
Owl Creek 8975 2.2 2.3 96 3.7 2.7 137
Powder River Pass 9480 6.8 4.2 162 5.4 5.4 100
Shell Creek 9580 8.8 6.7 131 5.8 6.1 95
Timber Creek 7950 1.8 1.9 95 1.5 3.8 39
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Basin Index (%) 125 87
SHOSHONE RIVER
Blackwater 9780 16.3 9.5 172 13.6 9.1 149
Evening Star 9200 16.3 9.9 165 17.1 11.9 144
Marquette 8760 3.3 -M * 6.1 -M *
Sylvan Road 7120 4.7 4.7 100 9.2 8.3 111
Younts Peak 8350 -M 6.1 * -M 6.9 *
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Basin Index (%) 155 136
POWDER RIVER
Bear Trap Meadow 8200 3.2 2.4 133 4.8 3.9 123
Cloud Peak Reservoir 9860 5.3 5.5 96 5.7 5.9 97
Grave Springs 8550 2.7 2.9 93 2.5 4.7 53
Hansen Sawmill 8360 2.7 2.7 100 4.1 3.8 108
Middle Powder 7760 3.9 4.5 87 2.7 5.8 47
Powder River Pass 9480 6.8 4.2 162 5.4 5.4 100
Soldier Park 8720 1.5 -M * 4.0 -M *
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Basin Index (%) 111 85
TONGUE RIVER
Big Goose 7990 2.5 3.3 76 3.3 5.0 66
Bone Springs Div 9350 6.9 6.8 101 5.0 6.6 76
Burgess Junction 7880 3.3 4.3 77 3.2 5.5 58
Dome Lake 8880 3.6 4.8 75 4.1 6.3 65
Little Goose 8870 3.2 -M * 4.8 -M *
Sucker Creek 8880 3.7 4.6 80 -M 6.3 *
Tie Creek 6870 1.1 1.5 73 -M 5.2 *
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Basin Index (%) 83 67
BELLE FOURCHE
Cole Canyon 5910 1.7 1.3 131 3.7 4.3 86
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Basin Index (%) 131 86
CHEYENNE RIVER BASIN
Blind Park 6890 2.5 2.6 96 4.6 5.5 84
North Rapid Creek 6130 2.8 2.7 104 3.2 4.6 70
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Basin Index (%) 100 77
UPPER N. PLATTE
Arapaho Ridge 10960 7.5 8.6 87 7.7 9.9 78
Blackhall Mtn 9820 10.0 -M * 10.4 -M *
Columbine 9160 4.3 7.9 54 7.4 10.5 70
Divide Peak 8880 4.6 7.4 62 8.0 9.4 85
Joe Wright 10120 6.3 8.9 71 11.9 11.2 106
Laprele Creek 8375 2.2 3.5 63 3.6 5.5 65
Med Bow 10500 14.0 -M * 12.4 -M *
North French Creek 10130 9.8 10.5 93 10.5 10.9 96
Never Summer 10280 7.4 7.9 94 6.6 -M *
Old Battle 10000 8.9 11.5 77 8.1 14.8 55
Rawah 9020 4.1 3.9 105 7.1 6.8 104
Sage Creek Basin 7850 3.1 5.0 62 4.8 6.5 74
Sand Lake 10050 10.6 10.4 102 8.8 10.3 85
South Brush Creek 8440 4.2 4.3 98 5.7 6.6 86
Tower 10500 10.7 18.1 59 11.6 16.8 69
Webber Springs 9250 6.1 8.6 71 8.1 11.3 72
Willow Creek Pass 9540 6.3 5.0 126 6.7 6.0 112
Zirkel 9340 6.4 8.4 76 11.3 12.3 92
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Basin Index (%) 79 82
SWEETWATER
Deer Park 9700 6.8 5.6 121 7.2 7.8 92
Larsen Creek 9000 2.8 4.3 65 5.2 -M *
South Pass 9040 5.7 5.7 100 4.3 7.6 57
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Basin Index (%) 98 75
LOWER N. PLATTE
Casper Mtn. 7900 3.9 5.3 74 3.1 6.9 45
Laprele Creek 8375 2.2 3.5 63 3.6 5.5 65
Reno Hill 8400 4.1 5.3 77 5.5 6.5 85
Windy Peak 7900 1.6 2.9 55 3.2 4.8 67
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Basin Index (%) 69 65
LARAMIE RIVER
Brooklyn Lake 10240 7.5 7.3 103 8.8 8.4 105
Cinnabar Park 9574 8.6 7.8 110 10.7 10.2 105
Crow Creek 8330 .6 3.9 15 5.5 5.0 110
Deadman Hill 10220 8.7 6.7 130 9.0 7.2 125
Rawah 9020 4.1 3.9 105 7.1 6.8 104
Roach 9700 6.0 6.2 97 8.1 8.2 99
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Basin Index (%) 99 107
S. PLATTE
Black Mountain 8920 4.2 -M * 6.6 -M *
Crow Creek 8330 .6 3.9 15 5.5 5.0 110
Deadman Hill 10220 8.7 6.7 130 9.0 7.2 125
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Basin Index (%) 88 119
LITTLE SNAKE RIVER
Battle Mountain 7440 1.3 3.4 38 -M 6.4 *
Divide Peak 8880 4.6 7.4 62 8.0 9.4 85
Elk River 8700 4.5 5.8 78 6.5 8.2 79
Little Snake River 8915 5.6 7.5 75 10.5 13.3 79
Old Battle 10000 8.9 11.5 77 8.1 14.8 55
Sage Creek Basin 7850 3.1 5.0 62 4.8 6.5 74
Sandstone RS 8150 2.7 4.1 66 -M 7.9 *
Whiskey Park 8950 6.4 8.4 76 9.3 10.9 85
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Basin Index (%) 70 75
UPPER GREEN RIVER
Big Sandy Opening 9080 5.6 5.0 112 5.9 5.6 105
Blind Bull Sum 8650 12.8 8.1 158 8.0 8.3 96
East Rim Divide 7930 3.5 3.7 95 4.5 4.9 92
Elkhart Park G.S. 9400 4.5 4.8 94 4.7 5.7 82
Gros Ventre Summit 8750 7.7 5.2 148 7.0 5.5 127
Gunsight Pass 9820 6.9 4.8 144 7.4 5.6 132
Kendall R.S. 7740 5.1 4.2 121 6.3 5.7 111
Loomis Park 8240 5.9 5.4 109 6.7 7.1 94
New Fork Lake 8340 4.4 3.9 113 3.7 4.6 80
Pocket Creek 9360 5.3 -M * 4.2 -M *
Snider Basin 8060 3.5 4.6 76 5.7 5.8 98
Spring Creek Divide 9000 8.8 8.4 105 9.2 9.6 96
Triple Peak 8500 9.7 7.5 129 11.7 9.8 119
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Basin Index (%) 120 103
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.8 -M * 4.1 -M *
Buck Pasture 9632 4.7 -M * 5.6 -M *
EF Blacks Fork GS 9360 2.8 -M * 3.7 -M *
Hams Fork 7840 2.5 3.9 64 3.8 4.6 83
Hewinta 9500 2.3 3.3 70 4.8 6.1 79
Hickerson Park 9122 2.8 2.4 117 2.2 4.6 48
Hole-in-Rock 9168 2.3 2.7 85 2.8 4.3 65
Indian Creek 9425 7.6 9.3 82 5.7 8.8 65
Kelley R.S. 8180 4.1 5.4 76 5.4 7.4 73
Spirit Lk 10235 3.3 -M * 3.7 -M *
Steel Creek Park 10158 5.8 5.8 100 5.8 6.9 84
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Basin Index (%) 84 71
UPPER BEAR RIVER
Bear River RS 8777 3.0 -M * 4.5 -M *
Bug Lake 7987 5.3 5.7 93 7.4 8.1 91
Burts Miller Ranch 8000 1.9 -M * 2.8 -M *
Chalk Creek #1 9171 5.6 9.3 60 6.7 10.6 63
Hayden Fork 9130 4.8 4.7 102 6.3 8.7 72
Kelley R.S. 8180 4.1 5.4 76 5.4 7.4 73
Lily Lake 9133 4.3 4.7 91 5.0 7.5 67
Monte Cristo 8932 8.4 9.0 93 8.3 10.6 78
Salt River Summit 7640 2.8 4.1 68 4.5 6.6 68
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Basin Index (%) 82 73
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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.