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 MONDAY: FEBRUARY 12 , 2018
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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 13.4 12.0 112 15.1 15.1 100
Black Bear 8170 28.8 26.4 109 27.6 26.8 103
Blind Bull Sum 8650 23.5 15.4 153 14.2 13.9 102
Cottonwood Creek 7670 15.2 14.1 108 17.1 17.1 100
East Rim Divide 7930 8.5 7.1 120 8.4 8.2 102
Grand Targhee 9260 34.9 25.4 137 22.3 22.5 99
Granite Creek 6770 12.5 11.8 106 15.1 14.7 103
Grassy Lake 7265 21.9 22.9 96 25.2 25.9 97
Gros Ventre Summit 8750 9.7 8.8 110 9.6 8.8 109
Gunsight Pass 9820 11.0 9.0 122 11.1 9.7 114
Lewis Lake Divide 7850 26.3 22.4 117 27.7 25.0 111
Phillips Bench 8200 16.9 17.3 98 17.9 19.7 91
Salt River Summit 7640 6.7 8.8 76 8.6 11.5 75
Snake River Station 6920 13.4 12.5 107 17.9 16.7 107
Spring Creek Divide 9000 18.1 16.0 113 17.4 16.7 104
Thumb Divide 7980 12.6 10.2 124 13.3 13.0 102
Togwotee Pass 9580 22.3 16.0 139 22.8 17.1 133
Two Ocean Plateau 9240 27.9 19.1 146 20.2 18.7 108
Willow Creek 8080 22.1 18.5 119 24.5 23.3 105
Younts Peak 8350 -M 10.3 * -M 11.3 *
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Basin Index (%) 118 104
MADISON-GALLATIN
Black Bear 8170 28.8 26.4 109 27.6 26.8 103
Canyon 7870 12.1 8.9 136 13.9 11.6 120
Madison Plateau 7750 17.7 15.4 115 18.3 18.6 98
West Yellowstone 6700 8.9 7.4 120 11.7 10.4 112
Whiskey Creek 6800 10.7 10.3 104 12.8 14.2 90
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Basin Index (%) 114 103
YELLOWSTONE
Beartooth Lake 9360 30.2 15.0 201 -M 13.9 *
Burnt Mtn 5880 4.4 3.1 142 10.3 8.4 123
Canyon 7870 12.1 8.9 136 13.9 11.6 120
Cole Creek 7850 9.8 8.8 111 6.3 8.2 77
Evening Star 9200 31.1 17.0 183 30.8 19.5 158
Fisher Creek 9100 39.4 22.3 177 32.8 22.4 146
Northeast Entrance 7350 10.5 7.1 148 13.9 8.9 156
Parker Peak 9400 24.6 13.8 178 21.1 12.3 172
Sylvan Lake 8420 17.6 13.6 129 19.3 15.9 121
Thumb Divide 7980 12.6 10.2 124 13.3 13.0 102
Two Ocean Plateau 9240 27.9 19.1 146 20.2 18.7 108
White Mill 8700 32.0 15.9 201 23.4 16.7 140
Wolverine 7650 -M 7.6 * -M 8.8 *
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Basin Index (%) 163 132
WIND RIVER
Burroughs Creek 8750 11.7 -M * 13.6 -M *
Castle Creek 8400 6.3 -M * 7.6 -M *
Cold Springs 9630 6.9 4.9 141 7.2 6.6 109
Deer Park 9700 7.7 9.5 81 9.9 13.5 73
Hobbs Park 10100 11.7 8.2 143 10.0 8.3 120
Kirwin 9550 14.6 6.1 239 13.1 7.7 170
Little Warm 9370 11.6 6.9 168 11.8 8.7 136
Owl Creek 8975 3.0 3.2 94 4.7 3.8 124
South Pass 9040 7.7 9.9 78 -M 11.7 *
St. Lawrence Alt 8620 2.3 4.4 52 6.3 5.7 111
Togwotee Pass 9580 22.3 16.0 139 22.8 17.1 133
Townsend Creek 8700 5.1 5.7 89 6.2 7.6 82
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Basin Index (%) 124 116
BIGHORN BASIN
Bald Mtn. 9380 15.7 12.1 130 10.5 11.5 91
Bear Trap Meadow 8200 6.5 3.7 176 7.4 5.5 135
Bone Springs Div 9350 14.1 10.4 136 10.3 10.3 100
Grave Springs 8550 4.7 5.3 89 3.8 7.0 54
Kirwin 9550 14.6 6.1 239 13.1 7.7 170
Marquette 8760 4.1 -M * 7.6 -M *
Middle Powder 7760 6.2 6.9 90 -M 7.9 *
Owl Creek 8975 3.0 3.2 94 4.7 3.8 124
Powder River Pass 9480 12.9 7.0 184 11.5 8.4 137
Shell Creek 9580 -M 9.8 * 12.4 9.5 131
Timber Creek 7950 2.5 3.1 81 -M 4.8 *
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Basin Index (%) 139 116
SHOSHONE RIVER
Blackwater 9780 25.7 15.3 168 23.6 14.2 166
Evening Star 9200 31.1 17.0 183 30.8 19.5 158
Marquette 8760 4.1 -M * 7.6 -M *
Sylvan Road 7120 11.3 8.4 135 16.3 12.7 128
Younts Peak 8350 -M 10.3 * -M 11.3 *
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Basin Index (%) 167 152
POWDER RIVER
Bear Trap Meadow 8200 6.5 3.7 176 7.4 5.5 135
Cloud Peak Reservoir 9860 11.6 9.2 126 10.0 8.5 118
Grave Springs 8550 4.7 5.3 89 3.8 7.0 54
Hansen Sawmill 8360 5.5 4.2 131 6.9 5.4 128
Middle Powder 7760 6.2 6.9 90 -M 7.9 *
Powder River Pass 9480 12.9 7.0 184 11.5 8.4 137
Soldier Park 8720 4.2 -M * 6.6 -M *
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Basin Index (%) 131 114
TONGUE RIVER
Big Goose 7990 4.9 5.5 89 5.5 7.1 77
Bone Springs Div 9350 14.1 10.4 136 10.3 10.3 100
Burgess Junction 7880 6.6 7.2 92 5.6 8.0 70
Dome Lake 8880 9.9 7.5 132 8.1 8.9 91
Little Goose 8870 6.2 -M * 8.1 -M *
Sucker Creek 8880 7.1 7.7 92 -M 9.4 *
Tie Creek 6870 2.8 3.7 76 5.7 7.6 75
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Basin Index (%) 108 84
BELLE FOURCHE
Cole Canyon 5910 5.0 4.1 122 6.9 6.4 108
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Basin Index (%) 122 108
CHEYENNE RIVER BASIN
Blind Park 6890 6.3 5.4 117 8.6 8.4 102
North Rapid Creek 6130 5.6 5.1 110 6.0 6.8 88
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Basin Index (%) 113 96
UPPER N. PLATTE
Arapaho Ridge 10960 13.6 14.3 95 13.6 15.4 88
Blackhall Mtn 9820 17.9 -M * 17.9 -M *
Columbine 9160 14.5 16.5 88 16.2 17.8 91
Divide Peak 8880 8.9 13.7 65 12.4 14.8 84
Joe Wright 10120 11.4 13.8 83 20.0 17.4 115
Laprele Creek 8375 4.5 6.1 74 5.9 8.1 73
Med Bow 10500 28.9 -M * 24.2 -M *
North French Creek 10130 19.0 18.0 106 19.1 18.2 105
Never Summer 10280 12.1 13.5 90 10.1 -M *
Old Battle 10000 16.7 21.2 79 16.2 24.4 66
Rawah 9020 7.5 7.1 106 10.6 9.6 110
Sage Creek Basin 7850 6.1 9.1 67 7.3 10.6 69
Sand Lake 10050 17.9 17.8 101 14.8 16.3 91
South Brush Creek 8440 6.5 7.8 83 7.9 10.2 77
Tower 10500 22.7 31.1 73 22.1 27.7 80
Webber Springs 9250 12.1 15.8 77 14.6 18.3 80
Willow Creek Pass 9540 9.1 8.2 111 9.7 9.0 108
Zirkel 9340 16.9 19.9 85 21.7 20.5 106
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Basin Index (%) 85 89
SWEETWATER
Deer Park 9700 7.7 9.5 81 9.9 13.5 73
Larsen Creek 9000 7.1 8.2 87 7.9 -M *
South Pass 9040 7.7 9.9 78 -M 11.7 *
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Basin Index (%) 82 73*
LOWER N. PLATTE
Casper Mtn. 7900 5.5 8.2 67 4.0 9.7 41
Laprele Creek 8375 4.5 6.1 74 5.9 8.1 73
Reno Hill 8400 6.8 8.4 81 7.9 9.7 81
Windy Peak 7900 4.0 4.6 87 5.6 6.8 82
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Basin Index (%) 76 68
LARAMIE RIVER
Brooklyn Lake 10240 17.4 13.1 133 18.1 13.9 130
Cinnabar Park 9574 16.6 14.7 113 19.1 17.3 110
Crow Creek 8330 2.0 5.9 34 7.6 6.8 112
Deadman Hill 10220 13.8 11.0 125 13.4 11.1 121
Rawah 9020 7.5 7.1 106 10.6 9.6 110
Roach 9700 9.8 10.9 90 12.5 12.8 98
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Basin Index (%) 107 114
S. PLATTE
Black Mountain 8920 6.4 -M * 9.1 -M *
Crow Creek 8330 2.0 5.9 34 7.6 6.8 112
Deadman Hill 10220 13.8 11.0 125 13.4 11.1 121
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Basin Index (%) 93 117
LITTLE SNAKE RIVER
Battle Mountain 7440 3.5 8.0 44 5.3 10.5 50
Divide Peak 8880 8.9 13.7 65 12.4 14.8 84
Elk River 8700 9.4 12.9 73 10.7 13.9 77
Little Snake River 8915 13.7 17.4 79 18.9 22.6 84
Old Battle 10000 16.7 21.2 79 16.2 24.4 66
Sage Creek Basin 7850 6.1 9.1 67 7.3 10.6 69
Sandstone RS 8150 5.4 9.2 59 5.4 13.0 42
Whiskey Park 8950 14.8 17.9 83 17.3 19.6 88
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Basin Index (%) 72 72
UPPER GREEN RIVER
Big Sandy Opening 9080 8.8 8.7 101 8.8 8.9 99
Blind Bull Sum 8650 23.5 15.4 153 14.2 13.9 102
East Rim Divide 7930 8.5 7.1 120 8.4 8.2 102
Elkhart Park G.S. 9400 8.7 8.1 107 8.2 9.1 90
Gros Ventre Summit 8750 9.7 8.8 110 9.6 8.8 109
Gunsight Pass 9820 11.0 9.0 122 11.1 9.7 114
Kendall R.S. 7740 10.3 8.6 120 10.9 10.0 109
Loomis Park 8240 11.7 10.4 112 12.5 12.2 102
New Fork Lake 8340 8.4 7.3 115 7.7 7.6 101
Pocket Creek 9360 6.2 -M * 5.9 -M *
Snider Basin 8060 8.8 8.5 104 10.7 10.0 107
Spring Creek Divide 9000 18.1 16.0 113 17.4 16.7 104
Triple Peak 8500 20.1 14.9 135 22.0 17.3 127
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Basin Index (%) 120 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.9 -M * 6.1 -M *
Buck Pasture 9632 7.6 -M * 8.6 -M *
EF Blacks Fork GS 9360 5.5 -M * 4.4 -M *
Hams Fork 7840 5.7 8.0 71 6.1 7.9 77
Hewinta 9500 4.8 6.6 73 7.7 9.4 82
Hickerson Park 9122 4.6 4.5 102 4.0 6.6 61
Hole-in-Rock 9168 3.9 4.5 87 4.6 6.2 74
Indian Creek 9425 14.0 16.0 88 10.3 15.2 68
Kelley R.S. 8180 8.3 9.8 85 9.5 12.5 76
Spirit Lk 10235 5.0 -M * 5.8 -M *
Steel Creek Park 10158 8.8 9.7 91 9.2 10.8 85
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Basin Index (%) 85 75
UPPER BEAR RIVER
Bear River RS 8777 5.9 -M * 7.2 -M *
Bug Lake 7987 9.8 12.6 78 10.6 13.4 79
Burts Miller Ranch 8000 3.7 -M * 4.4 -M *
Chalk Creek #1 9171 9.4 15.2 62 10.4 17.0 61
Hayden Fork 9130 8.2 9.9 83 10.4 14.2 73
Kelley R.S. 8180 8.3 9.8 85 9.5 12.5 76
Lily Lake 9133 7.0 8.3 84 7.3 11.6 63
Monte Cristo 8932 12.6 17.8 71 12.8 17.6 73
Salt River Summit 7640 6.7 8.8 76 8.6 11.5 75
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Basin Index (%) 75 71
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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.