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: FEBRUARY 17 , 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 14.1 12.8 110 15.7 15.7 100
Black Bear 8170 30.4 27.3 111 29.0 28.2 103
Blind Bull Sum 8650 24.2 16.3 148 14.6 14.6 100
Cottonwood Creek 7670 15.9 15.0 106 17.7 17.9 99
East Rim Divide 7930 8.8 7.4 119 8.7 8.6 101
Grand Targhee 9260 36.2 26.9 135 23.0 23.4 98
Granite Creek 6770 13.2 12.6 105 15.5 15.2 102
Grassy Lake 7265 23.2 24.3 95 26.4 27.2 97
Gros Ventre Summit 8750 9.8 9.0 109 9.9 9.2 108
Gunsight Pass 9820 11.3 9.6 118 11.4 10.1 113
Lewis Lake Divide 7850 27.9 23.5 119 -M 26.4 *
Phillips Bench 8200 18.0 18.1 99 19.0 20.7 92
Salt River Summit 7640 7.0 9.5 74 8.9 12.2 73
Snake River Station 6920 13.8 13.3 104 18.3 17.3 106
Spring Creek Divide 9000 18.7 16.5 113 18.0 17.6 102
Thumb Divide 7980 13.2 10.9 121 13.8 13.5 102
Togwotee Pass 9580 23.0 16.6 139 23.6 17.8 133
Two Ocean Plateau 9240 28.8 19.7 146 20.2 19.7 103
Willow Creek 8080 23.3 19.8 118 25.6 24.4 105
Younts Peak 8350 -M 11.0 * -M 11.7 *
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Basin Index (%) 117 102
MADISON-GALLATIN
Black Bear 8170 30.4 27.3 111 29.0 28.2 103
Canyon 7870 12.7 9.5 134 14.5 12.0 121
Madison Plateau 7750 18.7 15.9 118 19.1 19.2 99
West Yellowstone 6700 9.5 7.8 122 12.3 10.8 114
Whiskey Creek 6800 11.1 10.9 102 13.2 14.9 89
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Basin Index (%) 115 104
YELLOWSTONE
Beartooth Lake 9360 31.1 15.5 201 27.7 14.5 191
Burnt Mtn 5880 5.2 3.6 144 11.1 8.8 126
Canyon 7870 12.7 9.5 134 14.5 12.0 121
Cole Creek 7850 10.7 8.9 120 6.9 8.4 82
Evening Star 9200 31.9 17.8 179 30.9 20.4 151
Fisher Creek 9100 40.7 23.6 172 34.8 23.4 149
Northeast Entrance 7350 10.9 7.5 145 14.3 9.3 154
Parker Peak 9400 25.5 14.3 178 21.2 12.8 166
Sylvan Lake 8420 18.3 14.4 127 20.0 16.6 120
Thumb Divide 7980 13.2 10.9 121 13.8 13.5 102
Two Ocean Plateau 9240 28.8 19.7 146 20.2 19.7 103
White Mill 8700 32.9 16.4 201 23.7 17.5 135
Wolverine 7650 15.6 8.0 195 16.5 9.2 179
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Basin Index (%) 163 137
WIND RIVER
Burroughs Creek 8750 12.2 -M * 14.0 -M *
Castle Creek 8400 6.6 -M * 7.9 -M *
Cold Springs 9630 7.0 5.2 135 7.4 6.8 109
Deer Park 9700 7.6 9.9 77 10.1 14.1 72
Hobbs Park 10100 12.1 8.7 139 10.2 8.7 117
Kirwin 9550 14.9 6.2 240 13.4 8.1 165
Little Warm 9370 12.0 7.4 162 12.3 9.0 137
Owl Creek 8975 3.1 3.4 91 4.8 3.9 123
South Pass 9040 7.8 10.3 76 -M 12.3 *
St. Lawrence Alt 8620 2.5 4.6 54 6.4 5.9 108
Togwotee Pass 9580 23.0 16.6 139 23.6 17.8 133
Townsend Creek 8700 5.2 5.9 88 6.5 8.0 81
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Basin Index (%) 122 115
BIGHORN BASIN
Bald Mtn. 9380 16.2 13.2 123 11.0 11.9 92
Bear Trap Meadow 8200 6.9 3.8 182 7.6 5.7 133
Bone Springs Div 9350 14.6 10.9 134 10.8 10.7 101
Grave Springs 8550 4.9 5.7 86 3.9 7.2 54
Kirwin 9550 14.9 6.2 240 13.4 8.1 165
Marquette 8760 4.1 -M * 7.8 -M *
Middle Powder 7760 6.4 7.2 89 -M 8.1 *
Owl Creek 8975 3.1 3.4 91 4.8 3.9 123
Powder River Pass 9480 13.3 7.3 182 11.9 8.8 135
Shell Creek 9580 16.9 10.2 166 12.6 9.7 130
Timber Creek 7950 2.6 3.1 84 -M 4.9 *
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Basin Index (%) 141 115
SHOSHONE RIVER
Blackwater 9780 26.4 15.7 168 24.2 14.9 162
Evening Star 9200 31.9 17.8 179 30.9 20.4 151
Marquette 8760 4.1 -M * 7.8 -M *
Sylvan Road 7120 11.5 8.7 132 16.7 13.1 127
Younts Peak 8350 -M 11.0 * -M 11.7 *
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Basin Index (%) 165 148
POWDER RIVER
Bear Trap Meadow 8200 6.9 3.8 182 7.6 5.7 133
Cloud Peak Reservoir 9860 11.9 9.7 123 10.3 8.8 117
Grave Springs 8550 4.9 5.7 86 3.9 7.2 54
Hansen Sawmill 8360 5.8 4.3 135 7.1 5.5 129
Middle Powder 7760 6.4 7.2 89 -M 8.1 *
Powder River Pass 9480 13.3 7.3 182 11.9 8.8 135
Soldier Park 8720 4.5 -M * 6.9 -M *
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Basin Index (%) 129 113
TONGUE RIVER
Big Goose 7990 5.3 5.7 93 5.7 7.3 78
Bone Springs Div 9350 14.6 10.9 134 10.8 10.7 101
Burgess Junction 7880 6.7 7.5 89 5.8 8.3 70
Dome Lake 8880 11.0 7.9 139 8.4 9.2 91
Little Goose 8870 6.5 -M * 8.6 -M *
Sucker Creek 8880 7.4 8.1 91 5.3 9.7 55
Tie Creek 6870 2.9 3.9 74 6.3 7.8 81
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Basin Index (%) 109 80
BELLE FOURCHE
Cole Canyon 5910 5.2 4.5 116 7.0 6.6 106
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Basin Index (%) 116 106
CHEYENNE RIVER BASIN
Blind Park 6890 6.4 5.7 112 8.7 8.7 100
North Rapid Creek 6130 5.8 5.4 107 6.1 7.1 86
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Basin Index (%) 110 94
UPPER N. PLATTE
Arapaho Ridge 10960 14.7 14.9 99 14.6 16.2 90
Blackhall Mtn 9820 20.1 -M * 19.9 -M *
Columbine 9160 16.3 17.5 93 18.1 18.7 97
Divide Peak 8880 9.8 14.1 70 13.3 15.6 85
Joe Wright 10120 12.5 14.8 84 21.1 18.1 117
Laprele Creek 8375 4.6 6.7 69 6.0 8.5 71
Med Bow 10500 30.5 -M * 25.6 -M *
North French Creek 10130 20.2 19.3 105 20.3 19.1 106
Never Summer 10280 13.3 14.2 94 11.0 -M *
Old Battle 10000 18.6 22.2 84 17.9 25.7 70
Rawah 9020 8.5 7.5 113 11.7 9.9 118
Sage Creek Basin 7850 6.6 9.8 67 7.8 11.0 71
Sand Lake 10050 19.4 18.7 104 16.1 17.2 94
South Brush Creek 8440 7.3 8.6 85 8.7 10.6 82
Tower 10500 25.2 32.8 77 23.4 29.1 80
Webber Springs 9250 13.9 16.8 83 16.3 19.3 84
Willow Creek Pass 9540 10.0 8.6 116 10.6 9.4 113
Zirkel 9340 19.5 21.0 93 23.9 21.6 111
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Basin Index (%) 89 92
SWEETWATER
Deer Park 9700 7.6 9.9 77 10.1 14.1 72
Larsen Creek 9000 7.5 8.6 87 8.1 -M *
South Pass 9040 7.8 10.3 76 -M 12.3 *
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Basin Index (%) 80 72*
LOWER N. PLATTE
Casper Mtn. 7900 5.5 9.0 61 4.1 10.2 40
Laprele Creek 8375 4.6 6.7 69 6.0 8.5 71
Reno Hill 8400 6.9 8.9 78 7.9 10.2 77
Windy Peak 7900 4.2 5.2 81 5.8 7.2 81
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Basin Index (%) 71 66
LARAMIE RIVER
Brooklyn Lake 10240 18.7 13.9 135 19.2 14.6 132
Cinnabar Park 9574 17.7 16.0 111 20.0 18.3 109
Crow Creek 8330 2.4 6.4 38 7.8 7.2 108
Deadman Hill 10220 15.0 11.5 130 14.5 11.6 125
Rawah 9020 8.5 7.5 113 11.7 9.9 118
Roach 9700 10.9 11.6 94 13.5 13.4 101
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Basin Index (%) 109 116
S. PLATTE
Black Mountain 8920 7.1 -M * 9.8 -M *
Crow Creek 8330 2.4 6.4 38 7.8 7.2 108
Deadman Hill 10220 15.0 11.5 130 14.5 11.6 125
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Basin Index (%) 97 119
LITTLE SNAKE RIVER
Battle Mountain 7440 4.5 8.7 52 7.1 11.1 64
Divide Peak 8880 9.8 14.1 70 13.3 15.6 85
Elk River 8700 11.1 13.8 80 12.2 14.6 84
Little Snake River 8915 15.7 18.4 85 20.8 23.3 89
Old Battle 10000 18.6 22.2 84 17.9 25.7 70
Sage Creek Basin 7850 6.6 9.8 67 7.8 11.0 71
Sandstone RS 8150 6.5 9.9 66 6.1 13.8 44
Whiskey Park 8950 16.7 19.3 87 18.9 20.6 92
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Basin Index (%) 77 77
UPPER GREEN RIVER
Big Sandy Opening 9080 9.0 9.0 100 9.0 9.4 96
Blind Bull Sum 8650 24.2 16.3 148 14.6 14.6 100
East Rim Divide 7930 8.8 7.4 119 8.7 8.6 101
Elkhart Park G.S. 9400 9.0 8.6 105 8.4 9.5 88
Gros Ventre Summit 8750 9.8 9.0 109 9.9 9.2 108
Gunsight Pass 9820 11.3 9.6 118 11.4 10.1 113
Kendall R.S. 7740 10.8 9.0 120 11.2 10.5 107
Loomis Park 8240 12.3 10.6 116 13.1 12.7 103
New Fork Lake 8340 8.8 7.5 117 -M 7.9 *
Pocket Creek 9360 6.2 -M * 5.9 -M *
Snider Basin 8060 9.2 9.0 102 11.0 10.5 105
Spring Creek Divide 9000 18.7 16.5 113 18.0 17.6 102
Triple Peak 8500 21.0 15.5 135 22.9 18.2 126
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Basin Index (%) 119 106
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.1 -M * 6.4 -M *
Buck Pasture 9632 8.0 -M * 9.1 -M *
EF Blacks Fork GS 9360 6.0 -M * 4.4 -M *
Hams Fork 7840 5.9 8.4 70 6.3 8.3 76
Hewinta 9500 5.1 7.0 73 7.9 9.9 80
Hickerson Park 9122 4.7 5.1 92 4.1 6.9 59
Hole-in-Rock 9168 4.1 4.8 85 4.6 6.5 71
Indian Creek 9425 14.4 16.6 87 10.4 16.1 65
Kelley R.S. 8180 8.5 10.7 79 9.8 13.2 74
Spirit Lk 10235 5.1 -M * 6.0 -M *
Steel Creek Park 10158 9.0 10.3 87 9.6 11.2 86
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Basin Index (%) 82 73
UPPER BEAR RIVER
Bear River RS 8777 6.1 -M * 7.6 -M *
Bug Lake 7987 10.1 13.3 76 10.9 14.1 77
Burts Miller Ranch 8000 3.8 -M * 4.4 -M *
Chalk Creek #1 9171 9.8 16.1 61 10.9 17.8 61
Hayden Fork 9130 8.6 11.0 78 11.0 14.9 74
Kelley R.S. 8180 8.5 10.7 79 9.8 13.2 74
Lily Lake 9133 7.4 9.0 82 7.9 12.1 65
Monte Cristo 8932 13.3 18.9 70 13.4 18.6 72
Salt River Summit 7640 7.0 9.5 74 8.9 12.2 73
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Basin Index (%) 73 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.