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 THURSDAY: DECEMBER 14 , 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 6.4 5.3 121 8.5 7.9 108
Black Bear 8170 13.8 12.8 108 13.2 13.9 95
Blind Bull Sum 8650 11.1 6.8 163 7.3 7.4 99
Cottonwood Creek 7670 5.4 6.2 87 7.0 8.8 80
East Rim Divide 7930 3.0 2.8 107 4.0 4.3 93
Grand Targhee 9260 20.9 12.4 169 12.7 11.6 109
Granite Creek 6770 5.2 4.1 127 8.1 7.2 112
Grassy Lake 7265 7.9 9.0 88 11.7 12.9 91
Gros Ventre Summit 8750 7.1 4.6 154 6.5 5.0 130
Gunsight Pass 9820 6.1 4.2 145 6.8 5.0 136
Lewis Lake Divide 7850 10.0 9.4 106 13.5 13.0 104
Phillips Bench 8200 7.8 7.8 100 9.4 9.8 96
Salt River Summit 7760 2.2 3.1 71 4.1 5.7 72
Snake River Station 6920 4.8 4.5 107 8.8 8.7 101
Spring Creek Divide 9000 7.6 7.1 107 8.1 8.5 95
Thumb Divide 7980 6.5 4.2 155 8.4 6.9 122
Togwotee Pass 9580 13.3 8.7 153 13.1 9.2 142
Two Ocean Plateau 9240 17.2 10.3 167 11.7 10.2 115
Willow Creek 8380 9.0 7.8 115 12.5 12.3 102
Younts Peak 8350 -M 5.2 * -M 6.2 *
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Basin Index (%) 126 104
MADISON-GALLATIN
Black Bear 8170 13.8 12.8 108 13.2 13.9 95
Canyon 7870 4.1 3.7 111 6.3 6.0 105
Madison Plateau 7750 7.8 7.3 107 9.2 9.6 96
West Yellowstone 6700 -M 2.9 * -M 5.3 *
Whiskey Creek 6800 3.9 4.4 89 5.9 7.7 77
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Basin Index (%) 105 93
YELLOWSTONE
Beartooth Lake 9360 13.1 7.5 175 11.3 7.0 161
Burnt Mtn 5880 1.2 1.5 80 6.2 5.9 105
Canyon 7870 4.1 3.7 111 6.3 6.0 105
Cole Creek 7850 6.2 5.4 115 4.4 5.6 79
Evening Star 9200 14.7 8.6 171 15.3 10.5 146
Fisher Creek 9100 18.1 11.0 165 15.4 11.8 131
Northeast Entrance 7350 2.8 2.5 112 6.2 5.0 124
Parker Peak 9400 13.1 7.5 175 10.9 6.9 158
Sylvan Lake 8420 9.7 6.7 145 10.3 9.0 114
Thumb Divide 7980 6.5 4.2 155 8.4 6.9 122
Two Ocean Plateau 9240 17.2 10.3 167 11.7 10.2 115
White Mill 8700 13.8 7.4 186 9.7 8.9 109
Wolverine 7650 3.3 3.2 103 7.2 5.0 144
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Basin Index (%) 156 125
WIND RIVER
Burroughs Creek 8750 5.3 -M * 6.5 -M *
Castle Creek 8400 2.8 -M * 4.3 -M *
Cold Springs 9630 3.5 2.6 135 4.1 4.3 95
Deer Park 9700 6.0 4.9 122 6.6 7.0 94
Hobbs Park 10100 8.8 5.7 154 7.2 5.3 136
Kirwin 9550 8.7 3.9 223 7.2 4.7 153
Little Warm 9370 7.5 3.6 208 7.3 5.1 143
Owl Creek 8975 1.7 2.1 81 3.4 2.5 136
South Pass 9040 5.0 5.1 98 4.1 6.9 59
St. Lawrence Alt 8620 2.6 2.6 100 4.9 3.7 132
Togwotee Pass 9580 13.3 8.7 153 13.1 9.2 142
Townsend Creek 8700 3.5 3.1 113 4.8 5.0 96
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Basin Index (%) 143 117
BIGHORN BASIN
Bald Mtn. 9380 7.4 6.6 112 4.6 6.3 73
Bear Trap Meadow 8200 3.2 1.9 168 4.4 3.6 122
Bone Springs Div 9350 5.7 6.0 95 4.5 5.8 78
Grave Springs 8550 2.3 2.4 96 2.3 4.2 55
Kirwin 9550 8.7 3.9 223 7.2 4.7 153
Marquette 8760 3.1 -M * 5.6 -M *
Middle Powder 7760 3.6 3.5 103 2.8 5.1 55
Owl Creek 8975 1.7 2.1 81 3.4 2.5 136
Powder River Pass 9480 6.2 3.6 172 5.4 4.8 112
Shell Creek 9580 8.1 5.6 145 5.2 5.4 96
Timber Creek 7950 1.4 2.0 70 1.3 3.5 37
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Basin Index (%) 128 90
SHOSHONE RIVER
Blackwater 9780 14.9 8.2 182 12.2 8.1 151
Evening Star 9200 14.7 8.6 171 15.3 10.5 146
Marquette 8760 3.1 -M * 5.6 -M *
Sylvan Road 7120 4.1 3.9 105 8.2 7.3 112
Younts Peak 8350 -M 5.2 * -M 6.2 *
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Basin Index (%) 163 138
POWDER RIVER
Bear Trap Meadow 8200 3.2 1.9 168 4.4 3.6 122
Cloud Peak Reservoir 9860 5.0 4.7 106 5.7 5.3 108
Grave Springs 8550 2.3 2.4 96 2.3 4.2 55
Hansen Sawmill 8360 2.4 2.1 114 3.6 3.5 103
Middle Powder 7760 3.6 3.5 103 2.8 5.1 55
Powder River Pass 9480 6.2 3.6 172 5.4 4.8 112
Soldier Park 8720 1.3 -M * 3.7 -M *
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Basin Index (%) 125 91
TONGUE RIVER
Big Goose 7990 2.3 3.0 77 3.0 4.5 67
Bone Springs Div 9350 5.7 6.0 95 4.5 5.8 78
Burgess Junction 7880 2.6 3.7 70 2.9 4.8 60
Dome Lake 8880 3.3 4.3 77 3.7 5.6 66
Little Goose 8870 2.7 -M * 4.6 -M *
Sucker Creek 8880 3.3 4.0 82 -M 5.5 *
Tie Creek 6870 .7 1.1 64 3.4 4.6 74
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Basin Index (%) 81 69
BELLE FOURCHE
Cole Canyon 5910 1.3 1.1 118 3.2 4.0 80
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Basin Index (%) 118 80
CHEYENNE RIVER BASIN
Blind Park 6890 2.3 2.0 115 4.2 4.9 86
North Rapid Creek 6130 2.6 2.3 113 3.0 4.1 73
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Basin Index (%) 114 80
UPPER N. PLATTE
Arapaho Ridge 10960 6.0 7.1 85 6.4 8.8 73
Blackhall Mtn 9820 8.1 -M * 8.7 -M *
Columbine 9160 3.3 6.1 54 7.8 9.0 87
Divide Peak 8880 3.9 5.9 66 7.2 8.2 88
Joe Wright 10120 5.5 7.5 73 10.8 9.8 110
Laprele Creek 8375 2.0 2.9 69 3.4 4.8 71
Med Bow 10500 11.7 -M * 10.5 -M *
North French Creek 10130 8.4 8.9 94 9.2 9.4 98
Never Summer 10280 6.8 6.4 106 6.3 -M *
Old Battle 10000 7.6 9.6 79 7.1 12.7 56
Rawah 9020 3.6 3.3 109 6.9 5.9 117
Sage Creek Basin 7850 2.3 3.8 61 4.1 5.6 73
Sand Lake 10050 9.1 8.9 102 8.1 9.0 90
South Brush Creek 8440 3.6 3.4 106 5.2 5.8 90
Tower 10500 9.0 14.8 61 11.0 14.6 75
Webber Springs 9250 5.0 7.3 68 7.1 9.7 73
Willow Creek Pass 9540 5.3 4.2 126 5.7 5.4 106
Zirkel 9340 5.0 6.8 74 9.7 10.7 91
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Basin Index (%) 81 85
SWEETWATER
Deer Park 9700 6.0 4.9 122 6.6 7.0 94
Larsen Creek 9000 2.2 3.5 63 4.4 -M *
South Pass 9040 5.0 5.1 98 4.1 6.9 59
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Basin Index (%) 98 77
LOWER N. PLATTE
Casper Mtn. 7900 3.1 4.3 72 2.9 6.2 47
Laprele Creek 8375 2.0 2.9 69 3.4 4.8 71
Reno Hill 8400 4.1 4.7 87 5.0 5.9 85
Windy Peak 7900 1.4 2.3 61 3.1 4.3 72
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Basin Index (%) 75 68
LARAMIE RIVER
Brooklyn Lake 10240 5.5 6.0 92 7.1 7.2 99
Cinnabar Park 9574 6.9 7.1 97 9.0 9.0 100
Crow Creek 8330 .1 3.5 3 4.6 4.4 105
Deadman Hill 10220 7.8 5.4 144 8.1 6.3 129
Rawah 9020 3.6 3.3 109 6.9 5.9 117
Roach 9700 5.1 4.9 104 7.3 7.0 104
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Basin Index (%) 96 108
S. PLATTE
Black Mountain 8920 3.8 -M * 6.0 -M *
Crow Creek 8330 .1 3.5 3 4.6 4.4 105
Deadman Hill 10220 7.8 5.4 144 8.1 6.3 129
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Basin Index (%) 89 119
LITTLE SNAKE RIVER
Battle Mountain 7440 .8 2.5 32 3.9 5.6 70
Divide Peak 8880 3.9 5.9 66 7.2 8.2 88
Elk River 8700 3.6 4.5 80 6.1 7.1 86
Little Snake River 8915 4.4 5.3 83 8.9 11.5 77
Old Battle 10000 7.6 9.6 79 7.1 12.7 56
Sage Creek Basin 7850 2.3 3.8 61 4.1 5.6 73
Sandstone RS 8150 1.9 3.3 58 3.3 6.8 49
Whiskey Park 8950 4.9 7.0 70 7.9 9.4 84
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Basin Index (%) 70 72
UPPER GREEN RIVER
Big Sandy Opening 9080 4.2 4.5 93 4.8 5.0 96
Blind Bull Sum 8650 11.1 6.8 163 7.3 7.4 99
East Rim Divide 7930 3.0 2.8 107 4.0 4.3 93
Elkhart Park G.S. 9400 3.6 4.1 88 4.1 5.1 80
Gros Ventre Summit 8750 7.1 4.6 154 6.5 5.0 130
Gunsight Pass 9820 6.1 4.2 145 6.8 5.0 136
Kendall R.S. 7740 4.2 3.4 124 5.3 5.1 104
Loomis Park 8240 5.1 4.4 116 5.9 6.2 95
New Fork Lake 8340 3.4 3.2 106 3.0 4.1 73
Pocket Creek 9360 4.5 -M * 3.6 -M *
Snider Basin 8060 2.5 3.5 71 5.0 5.0 100
Spring Creek Divide 9000 7.6 7.1 107 8.1 8.5 95
Triple Peak 8500 8.0 6.1 131 10.3 8.7 118
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Basin Index (%) 120 102
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.3 -M * 3.3 -M *
Buck Pasture 9632 3.7 -M * 4.5 -M *
EF Blacks Fork GS 9360 2.5 -M * 3.3 -M *
Hams Fork 7840 1.6 3.2 50 3.2 4.1 78
Hewinta 9500 1.6 2.6 62 4.0 5.5 73
Hickerson Park 9122 2.5 1.9 132 2.2 4.3 51
Hole-in-Rock 9168 1.8 2.2 82 2.4 4.0 60
Indian Creek 9425 6.5 7.4 88 5.3 7.6 70
Kelley R.S. 8180 3.3 4.2 79 4.5 6.5 69
Spirit Lk 10235 2.8 -M * 3.2 -M *
Steel Creek Park 10158 4.8 5.1 94 4.8 6.2 77
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Basin Index (%) 83 69
UPPER BEAR RIVER
Bear River RS 8777 2.2 -M * 3.7 -M *
Bug Lake 7987 3.9 4.8 81 6.1 7.2 85
Burts Miller Ranch 8000 1.0 -M * 2.5 -M *
Chalk Creek #1 9171 4.7 7.8 60 5.6 9.5 59
Hayden Fork 9130 3.3 3.9 85 4.9 7.7 64
Kelley R.S. 8180 3.3 4.2 79 4.5 6.5 69
Lily Lake 9133 2.5 4.0 62 3.9 6.6 59
Monte Cristo 8932 6.4 7.4 86 6.6 9.2 72
Salt River Summit 7760 2.2 3.1 71 4.1 5.7 72
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Basin Index (%) 75 68
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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.
