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 TUESDAY: FEBRUARY 18 , 2020
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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 12.9 12.9 100 13.3 16.0 83
Black Bear 8170 25.8 27.5 94 24.2 28.4 85
Blind Bull Sum 8650 20.3 16.5 123 12.0 14.8 81
Cottonwood Creek 7670 22.2 15.2 146 23.2 18.1 128
East Rim Divide 7930 9.8 7.4 132 7.7 8.7 89
Grand Targhee 9260 32.9 27.2 121 22.8 23.5 97
Granite Creek 6770 13.2 12.8 103 12.2 15.3 80
Grassy Lake 7265 25.2 24.5 103 24.9 27.5 91
Gros Ventre Summit 8750 8.5 9.1 93 8.4 9.3 90
Gunsight Pass 9820 10.0 9.8 102 9.9 10.1 98
Lewis Lake Divide 7850 19.7 23.7 83 22.8 26.7 85
Phillips Bench 8200 22.3 18.2 123 21.6 21.0 103
Salt River Summit 7640 12.3 9.6 128 12.5 12.3 102
Snake River Station 6920 13.4 13.4 100 15.8 17.5 90
Spring Creek Divide 9000 21.0 16.6 127 20.1 17.8 113
Thumb Divide 7980 10.9 11.0 99 10.9 13.6 80
Togwotee Pass 9580 21.1 16.7 126 20.0 18.0 111
Two Ocean Plateau 9240 22.3 19.8 113 17.3 20.0 86
Willow Creek 8080 28.1 20.0 140 28.0 24.6 114
Younts Peak 8350 13.1 11.1 118 10.4 11.8 88
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Basin Index (%) 113 95
MADISON-GALLATIN
Black Bear 8170 25.8 27.5 94 24.2 28.4 85
Canyon 7870 10.7 9.6 111 10.8 12.2 89
Madison Plateau 7750 16.0 16.1 99 11.6 19.4 60
West Yellowstone 6700 8.6 7.9 109 7.4 10.9 68
Whiskey Creek 6800 11.5 11.1 104 13.0 15.0 87
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Basin Index (%) 101 78
YELLOWSTONE
Beartooth Lake 9360 17.2 15.5 111 15.8 14.6 108
Burnt Mtn 5880 4.9 3.7 132 9.4 8.9 106
Canyon 7870 10.7 9.6 111 10.8 12.2 89
Cole Creek 7850 13.4 8.9 151 10.1 8.5 119
Evening Star 9200 21.4 18.0 119 23.2 20.5 113
Fisher Creek 9100 24.2 23.9 101 24.8 23.6 105
Northeast Entrance 7350 8.6 7.5 115 9.6 9.3 103
Parker Peak 9400 19.8 14.4 138 17.4 12.9 135
Sylvan Lake 8420 16.2 14.6 111 17.8 16.7 107
Thumb Divide 7980 10.9 11.0 99 10.9 13.6 80
Two Ocean Plateau 9240 22.3 19.8 113 17.3 20.0 86
White Mill 8700 19.9 16.6 120 16.2 17.7 92
Wolverine 7650 11.1 8.1 137 10.5 9.3 113
Younts Peak 8350 13.1 11.1 118 10.4 11.8 88
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Basin Index (%) 117 102
WIND RIVER
Burroughs Creek 8750 9.2 -M * 10.0 -M *
Castle Creek 8400 4.0 -M * 4.6 -M *
Cold Springs 9630 5.8 5.3 109 5.3 6.9 77
Deer Park 9700 9.4 10.0 94 8.1 14.1 57
Hobbs Park 10100 9.4 8.8 107 7.8 8.8 89
Kirwin 9550 8.4 6.2 135 7.0 8.1 86
Little Warm 9370 8.5 7.5 113 6.5 9.1 71
Owl Creek 8975 4.7 3.4 138 5.0 4.0 125
South Pass 9040 8.4 10.4 81 7.3 12.5 58
St. Lawrence Alt 8620 3.6 4.7 77 5.1 6.0 85
Togwotee Pass 9580 21.1 16.7 126 20.0 18.0 111
Townsend Creek 8700 6.8 5.9 115 6.8 8.1 84
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Basin Index (%) 109 83
BIGHORN BASIN
Bald Mtn. 9380 17.1 13.3 129 13.0 12.0 108
Bear Trap Meadow 8200 -M 3.9 * 7.6 5.7 133
Bone Springs Div 9350 13.5 11.0 123 11.1 10.8 103
Grave Springs 8550 8.6 5.7 151 8.9 7.3 122
Kirwin 9550 8.4 6.2 135 7.0 8.1 86
Marquette 8760 5.3 -M * 6.6 -M *
Middle Powder 7760 10.4 7.2 144 10.3 8.2 126
Owl Creek 8975 4.7 3.4 138 5.0 4.0 125
Powder River Pass 9480 10.1 7.3 138 9.7 8.8 110
Shell Creek 9580 11.5 10.3 112 11.3 9.8 115
Timber Creek 7950 4.8 3.1 155 5.4 4.9 110
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Basin Index (%) 132 112
SHOSHONE RIVER
Blackwater 9780 17.0 15.9 107 17.0 15.0 113
Evening Star 9200 21.4 18.0 119 23.2 20.5 113
Marquette 8760 5.3 -M * 6.6 -M *
Sylvan Lake 8420 16.2 14.6 111 17.8 16.7 107
Sylvan Road 7120 9.8 8.7 113 13.4 13.1 102
Younts Peak 8350 13.1 11.1 118 10.4 11.8 88
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Basin Index (%) 113 106
POWDER RIVER
Bear Trap Meadow 8200 -M 3.9 * 7.6 5.7 133
Cloud Peak Reservoir 9860 10.5 9.7 108 9.8 8.8 111
Grave Springs 8550 8.6 5.7 151 8.9 7.3 122
Hansen Sawmill 8360 5.5 4.4 125 6.6 5.6 118
Middle Powder 7760 10.4 7.2 144 10.3 8.2 126
Powder River Pass 9480 10.1 7.3 138 9.7 8.8 110
Soldier Park 8720 4.0 -M * 6.6 -M *
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Basin Index (%) 131 119
TONGUE RIVER
Big Goose 7990 6.8 5.8 117 7.7 7.4 104
Bone Springs Div 9350 13.5 11.0 123 11.1 10.8 103
Burgess Junction 7880 9.0 7.5 120 9.9 8.4 118
Dome Lake 8880 9.4 7.9 119 7.3 9.3 78
Little Goose 8870 8.2 -M * 6.6 -M *
Sucker Creek 8880 10.9 8.1 135 9.6 9.8 98
Tie Creek 6870 7.1 4.0 178 10.6 7.9 134
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Basin Index (%) 128 105
BELLE FOURCHE
Blind Park 6890 6.3 5.7 111 6.7 8.8 76
Cole Canyon 5910 2.3 4.6 50 -M 6.7 *
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Basin Index (%) 83 76
CHEYENNE RIVER BASIN
Blind Park 6890 6.3 5.7 111 6.7 8.8 76
North Rapid Creek 6130 5.8 5.4 107 6.8 7.1 96
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Basin Index (%) 109 85
UPPER N. PLATTE
Arapaho Ridge 10960 17.8 15.1 118 17.1 16.3 105
Blackhall Mtn 9820 23.5 -M * 23.0 -M *
Columbine 9160 25.5 17.8 143 -M 18.8 *
Divide Peak 8880 17.2 14.3 120 18.1 15.7 115
Joe Wright 10120 16.6 15.0 111 21.2 18.3 116
Laprele Creek 8375 9.6 6.8 141 9.7 8.6 113
Med Bow 10500 35.9 -M * 29.4 -M *
Never Summer 10280 16.0 14.4 111 11.7 -M *
North French Creek 10130 27.8 19.4 143 26.8 19.4 138
Old Battle 10000 25.1 22.4 112 23.1 25.9 89
Rawah 9020 10.4 7.5 139 11.8 10.0 118
Sage Creek Basin 7850 12.9 10.0 129 10.5 11.1 95
Sand Lake 10050 23.3 19.0 123 21.6 17.4 124
South Brush Creek 8440 11.1 8.8 126 11.1 10.7 104
Tower 10500 37.2 33.2 112 31.5 29.3 108
Webber Springs 9250 17.5 17.0 103 18.8 19.5 96
Whiskey Park 8950 27.7 19.5 142 26.6 20.8 128
Willow Creek Pass 9540 10.9 8.7 125 10.1 9.5 106
Zirkel 9340 23.3 21.3 109 25.5 21.7 118
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Basin Index (%) 122 112
SWEETWATER
Deer Park 9700 9.4 10.0 94 8.1 14.1 57
Larsen Creek 9000 -M 8.6 * 5.7 -M *
South Pass 9040 8.4 10.4 81 7.3 12.5 58
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Basin Index (%) 87 58
LOWER N. PLATTE
Casper Mtn. 7900 13.0 9.2 141 8.7 10.3 84
Laprele Creek 8375 9.6 6.8 141 9.7 8.6 113
Reno Hill 8400 13.1 9.0 146 13.2 10.3 128
Windy Peak 7900 7.7 5.2 148 6.1 7.3 84
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Basin Index (%) 144 103
LARAMIE RIVER
Brooklyn Lake 10240 22.3 14.1 158 21.5 14.8 145
Cinnabar Park 9574 20.0 16.0 125 20.5 18.5 111
Crow Creek 8330 6.9 6.5 106 8.7 7.3 119
Deadman Hill 10220 14.4 11.6 124 12.6 11.7 108
Rawah 9020 10.4 7.5 139 11.8 10.0 118
Roach 9700 11.5 11.7 98 11.1 13.5 82
Windy Peak 7900 7.7 5.2 148 6.1 7.3 84
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Basin Index (%) 128 111
S. PLATTE
Black Mountain 8920 8.5 -M * 10.3 -M *
Crow Creek 8330 6.9 6.5 106 8.7 7.3 119
Deadman Hill 10220 14.4 11.6 124 12.6 11.7 108
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Basin Index (%) 118 112
LITTLE SNAKE RIVER
Battle Mountain 7440 12.0 8.8 136 12.0 11.2 107
Divide Peak 8880 17.2 14.3 120 18.1 15.7 115
Elk River 8700 17.6 13.9 127 14.8 14.8 100
Little Snake River 8915 23.1 18.5 125 27.3 23.5 116
Old Battle 10000 25.1 22.4 112 23.1 25.9 89
Sage Creek Basin 7850 12.9 10.0 129 10.5 11.1 95
Sandstone RS 8150 14.2 10.0 142 13.2 13.9 95
Whiskey Park 8950 27.7 19.5 142 26.6 20.8 128
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Basin Index (%) 128 106
UPPER GREEN RIVER
Big Sandy Opening 9080 7.1 9.1 78 5.9 9.6 61
Blind Bull Sum 8650 20.3 16.5 123 12.0 14.8 81
East Rim Divide 7930 9.8 7.4 132 7.7 8.7 89
Elkhart Park G.S. 9400 8.3 8.7 95 7.9 9.6 82
Gros Ventre Summit 8750 8.5 9.1 93 8.4 9.3 90
Gunsight Pass 9820 10.0 9.8 102 9.9 10.1 98
Indian Creek 9425 18.2 16.8 108 13.0 16.4 79
Kendall R.S. 7740 8.4 9.1 92 8.3 10.6 78
Loomis Park 8240 11.6 10.7 108 14.1 12.9 109
New Fork Lake 8340 8.6 7.6 113 6.5 8.0 81
Pocket Creek 9360 -M -M * 5.9 -M *
Snider Basin 8060 11.3 9.1 124 11.7 10.6 110
Spring Creek Divide 9000 21.0 16.6 127 20.1 17.8 113
Triple Peak 8500 21.6 15.6 138 21.3 18.3 116
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Basin Index (%) 113 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.2 -M * 9.6 -M *
Buck Pasture 9632 14.5 -M * 14.2 -M *
EF Blacks Fork GS 9360 11.8 -M * 7.9 -M *
Hams Fork 7840 10.4 8.5 122 9.1 8.4 108
Hewinta 9500 8.7 7.0 124 11.2 9.9 113
Hickerson Park 9122 8.3 5.2 160 8.9 7.0 127
Hole-in-Rock 9168 8.4 4.8 175 8.4 6.6 127
Indian Creek 9425 18.2 16.8 108 13.0 16.4 79
Kelley R.S. 8180 12.5 10.8 116 13.1 13.4 98
Spirit Lk 10235 13.0 -M * 13.8 -M *
Steel Creek Park 10158 12.3 10.4 118 14.3 11.4 125
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Basin Index (%) 124 107
UPPER BEAR RIVER
Bear River RS 8777 7.2 -M * 8.5 -M *
Bug Lake 7987 16.0 13.4 119 14.6 14.3 102
Burts Miller Ranch 8000 5.4 -M * 5.5 -M *
Chalk Creek #1 9171 15.9 16.3 98 14.8 18.0 82
Hayden Fork 9130 13.1 11.2 117 16.2 15.1 107
Kelley R.S. 8180 12.5 10.8 116 13.1 13.4 98
Lily Lake 9133 9.3 9.2 101 9.6 12.2 79
Monte Cristo 8932 22.6 19.1 118 19.5 18.8 104
Salt River Summit 7640 12.3 9.6 128 12.5 12.3 102
Spring Creek Divide 9000 21.0 16.6 127 20.1 17.8 113
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Basin Index (%) 116 99
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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.