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: FEBRUARY 23 , 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 13.1 98 13.5 16.7 81
Black Bear 8170 26.0 28.3 92 24.4 29.6 82
Blind Bull Sum 8650 20.6 17.3 119 12.1 15.4 79
Cottonwood Creek 7670 22.1 16.0 138 23.2 18.8 123
East Rim Divide 7930 9.9 7.6 130 8.0 9.2 87
Grand Targhee 9260 33.0 28.3 117 22.9 23.9 96
Granite Creek 6770 13.4 13.1 102 12.2 15.9 77
Grassy Lake 7265 25.2 25.1 100 25.4 28.6 89
Gros Ventre Summit 8750 8.7 9.4 93 8.6 9.7 89
Gunsight Pass 9820 10.1 10.1 100 10.1 10.4 97
Lewis Lake Divide 7850 19.7 24.8 79 22.9 27.8 82
Phillips Bench 8200 22.3 19.0 117 21.7 21.9 99
Salt River Summit 7640 12.3 10.2 121 12.7 12.9 98
Snake River Station 6920 13.5 13.7 99 15.8 18.0 88
Spring Creek Divide 9000 21.4 17.5 122 20.3 18.6 109
Thumb Divide 7980 11.0 11.4 96 11.1 14.1 79
Togwotee Pass 9580 21.1 17.1 123 20.1 18.7 107
Two Ocean Plateau 9240 22.3 20.8 107 17.5 20.9 84
Willow Creek 8080 28.4 21.3 133 28.0 25.8 109
Younts Peak 8350 13.2 11.3 117 11.0 12.2 90
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Basin Index (%) 109 93
MADISON-GALLATIN
Black Bear 8170 26.0 28.3 92 24.4 29.6 82
Canyon 7870 10.7 10.1 106 10.9 12.6 87
Madison Plateau 7750 16.1 17.2 94 13.9 20.3 68
West Yellowstone 6700 8.7 8.4 104 7.4 11.2 66
Whiskey Creek 6800 11.5 11.5 100 13.2 15.7 84
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Basin Index (%) 97 78
YELLOWSTONE
Beartooth Lake 9360 17.3 16.0 108 16.1 15.1 107
Burnt Mtn 5880 4.9 3.9 126 10.0 9.0 111
Canyon 7870 10.7 10.1 106 10.9 12.6 87
Cole Creek 7850 13.8 9.1 152 10.5 8.7 121
Evening Star 9200 21.6 18.6 116 23.5 21.4 110
Fisher Creek 9100 24.4 24.9 98 25.0 24.6 102
Northeast Entrance 7350 8.6 7.6 113 9.7 9.6 101
Parker Peak 9400 20.0 15.2 132 18.3 13.5 136
Sylvan Lake 8420 16.3 15.3 107 17.9 17.3 103
Thumb Divide 7980 11.0 11.4 96 11.1 14.1 79
Two Ocean Plateau 9240 22.3 20.8 107 17.5 20.9 84
White Mill 8700 19.9 17.7 112 16.4 18.4 89
Wolverine 7650 11.1 8.4 132 10.6 9.6 110
Younts Peak 8350 13.2 11.3 117 11.0 12.2 90
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Basin Index (%) 113 101
WIND RIVER
Burroughs Creek 8750 9.3 -M * 10.5 -M *
Castle Creek 8400 4.1 -M * 4.7 -M *
Cold Springs 9630 5.9 5.4 109 5.8 7.2 81
Deer Park 9700 9.5 10.4 91 8.8 14.5 61
Hobbs Park 10100 9.7 9.1 107 8.4 9.0 93
Kirwin 9550 8.6 6.6 130 7.5 8.4 89
Little Warm 9370 8.7 7.7 113 7.2 9.4 77
Owl Creek 8975 4.9 3.7 132 5.2 4.1 127
South Pass 9040 8.6 10.8 80 7.8 12.9 60
St. Lawrence Alt 8620 3.8 5.0 76 5.2 6.2 84
Togwotee Pass 9580 21.1 17.1 123 20.1 18.7 107
Townsend Creek 8700 6.9 6.1 113 7.2 8.3 87
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Basin Index (%) 107 84
BIGHORN BASIN
Bald Mtn. 9380 17.4 14.0 124 13.7 12.5 110
Bear Trap Meadow 8200 7.8 4.1 190 8.0 5.9 136
Bone Springs Div 9350 13.6 11.3 120 11.5 11.2 103
Grave Springs 8550 8.7 6.2 140 9.1 7.5 121
Kirwin 9550 8.6 6.6 130 7.5 8.4 89
Marquette 8760 5.4 -M * 6.7 -M *
Middle Powder 7760 10.3 7.5 137 10.4 8.3 125
Owl Creek 8975 4.9 3.7 132 5.2 4.1 127
Powder River Pass 9480 10.1 7.6 133 10.1 9.2 110
Shell Creek 9580 11.7 10.8 108 11.4 10.1 113
Timber Creek 7950 4.8 3.1 155 5.4 5.0 108
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Basin Index (%) 131 112
SHOSHONE RIVER
Blackwater 9780 17.0 16.6 102 17.3 15.5 112
Evening Star 9200 21.6 18.6 116 23.5 21.4 110
Marquette 8760 5.4 -M * 6.7 -M *
Sylvan Lake 8420 16.3 15.3 107 17.9 17.3 103
Sylvan Road 7120 9.8 8.9 110 13.7 13.5 101
Younts Peak 8350 13.2 11.3 117 11.0 12.2 90
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Basin Index (%) 110 104
POWDER RIVER
Bear Trap Meadow 8200 7.8 4.1 190 8.0 5.9 136
Cloud Peak Reservoir 9860 10.6 10.0 106 10.4 9.2 113
Grave Springs 8550 8.7 6.2 140 9.1 7.5 121
Hansen Sawmill 8360 5.6 4.4 127 6.7 5.8 116
Middle Powder 7760 10.3 7.5 137 10.4 8.3 125
Powder River Pass 9480 10.1 7.6 133 10.1 9.2 110
Soldier Park 8720 4.2 -M * 6.8 -M *
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Basin Index (%) 133 119
TONGUE RIVER
Big Goose 7990 7.0 6.0 117 8.1 7.6 107
Bone Springs Div 9350 13.6 11.3 120 11.5 11.2 103
Burgess Junction 7880 9.0 7.8 115 10.1 8.6 117
Dome Lake 8880 9.7 8.2 118 7.7 9.6 80
Little Goose 8870 8.2 -M * 6.5 -M *
Sucker Creek 8880 10.9 8.5 128 10.1 10.0 101
Tie Creek 6870 7.2 4.2 171 10.7 8.0 134
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Basin Index (%) 125 106
BELLE FOURCHE
Blind Park 6890 6.2 6.0 103 6.7 9.0 74
Cole Canyon 5910 1.8 4.8 38 -M 6.8 *
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Basin Index (%) 74 74
CHEYENNE RIVER BASIN
Blind Park 6890 6.2 6.0 103 6.7 9.0 74
North Rapid Creek 6130 5.9 5.7 104 6.7 7.2 93
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Basin Index (%) 103 83
UPPER N. PLATTE
Arapaho Ridge 10960 18.0 15.7 115 17.4 16.9 103
Blackhall Mtn 9820 23.8 -M * 23.2 -M *
Columbine 9160 26.0 18.8 138 24.0 19.5 123
Divide Peak 8880 17.5 15.1 116 18.2 16.3 112
Joe Wright 10120 16.8 15.6 108 21.3 19.1 112
Laprele Creek 8375 9.7 7.3 133 10.0 9.0 111
Med Bow 10500 36.2 -M * 29.4 -M *
Never Summer 10280 15.9 15.2 105 11.8 -M *
North French Creek 10130 27.8 20.0 139 26.8 20.2 133
Old Battle 10000 25.2 23.2 109 23.4 27.0 87
Rawah 9020 10.7 8.0 134 12.0 10.3 117
Sage Creek Basin 7850 13.2 10.4 127 10.7 11.4 94
Sand Lake 10050 23.8 20.1 118 21.9 18.2 120
South Brush Creek 8440 11.2 9.5 118 11.3 11.2 101
Tower 10500 37.3 35.0 107 32.1 30.6 105
Webber Springs 9250 17.6 17.9 98 19.1 20.3 94
Whiskey Park 8950 28.1 20.3 138 26.7 21.6 124
Willow Creek Pass 9540 10.9 9.1 120 10.3 9.9 104
Zirkel 9340 23.7 22.3 106 25.8 22.5 115
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Basin Index (%) 118 110
SWEETWATER
Deer Park 9700 9.5 10.4 91 8.8 14.5 61
Larsen Creek 9000 -M 9.0 * 5.9 -M *
South Pass 9040 8.6 10.8 80 7.8 12.9 60
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Basin Index (%) 85 61
LOWER N. PLATTE
Casper Mtn. 7900 13.0 9.6 135 8.9 10.6 84
Laprele Creek 8375 9.7 7.3 133 10.0 9.0 111
Reno Hill 8400 13.2 9.4 140 13.7 10.6 129
Windy Peak 7900 7.9 5.5 144 6.7 7.5 89
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Basin Index (%) 138 104
LARAMIE RIVER
Brooklyn Lake 10240 22.5 14.5 155 21.7 15.4 141
Cinnabar Park 9574 20.2 16.4 123 21.0 19.1 110
Crow Creek 8330 7.1 6.6 108 9.0 7.6 118
Deadman Hill 10220 14.6 12.1 121 12.8 12.2 105
Rawah 9020 10.7 8.0 134 12.0 10.3 117
Roach 9700 11.7 12.1 97 11.7 14.1 83
Windy Peak 7900 7.9 5.5 144 6.7 7.5 89
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Basin Index (%) 126 110
S. PLATTE
Black Mountain 8920 8.8 -M * 10.5 -M *
Crow Creek 8330 7.1 6.6 108 9.0 7.6 118
Deadman Hill 10220 14.6 12.1 121 12.8 12.2 105
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Basin Index (%) 116 110
LITTLE SNAKE RIVER
Battle Mountain 7440 12.4 9.3 133 12.5 11.7 107
Divide Peak 8880 17.5 15.1 116 18.2 16.3 112
Elk River 8700 17.8 14.5 123 14.9 15.4 97
Little Snake River 8915 23.1 19.2 120 27.4 24.3 113
Old Battle 10000 25.2 23.2 109 23.4 27.0 87
Sage Creek Basin 7850 13.2 10.4 127 10.7 11.4 94
Sandstone RS 8150 14.3 10.3 139 13.4 14.6 92
Whiskey Park 8950 28.1 20.3 138 26.7 21.6 124
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Basin Index (%) 124 103
UPPER GREEN RIVER
Big Sandy Opening 9080 7.2 9.5 76 6.1 10.0 61
Blind Bull Sum 8650 20.6 17.3 119 12.1 15.4 79
East Rim Divide 7930 9.9 7.6 130 8.0 9.2 87
Elkhart Park G.S. 9400 8.5 9.0 94 8.1 10.0 81
Gros Ventre Summit 8750 8.7 9.4 93 8.6 9.7 89
Gunsight Pass 9820 10.1 10.1 100 10.1 10.4 97
Indian Creek 9425 18.4 17.8 103 13.1 17.1 77
Kendall R.S. 7740 8.5 9.5 89 8.5 11.2 76
Loomis Park 8240 11.7 11.3 104 14.6 13.5 108
New Fork Lake 8340 8.7 7.8 112 -M 8.4 *
Pocket Creek 9360 -M -M * 6.1 -M *
Snider Basin 8060 11.3 9.2 123 11.8 11.1 106
Spring Creek Divide 9000 21.4 17.5 122 20.3 18.6 109
Triple Peak 8500 21.7 16.2 134 21.6 19.4 111
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Basin Index (%) 110 92
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.3 -M * 9.6 -M *
Buck Pasture 9632 14.3 -M * 14.0 -M *
EF Blacks Fork GS 9360 11.8 -M * 7.7 -M *
Hams Fork 7840 10.4 8.8 118 9.5 8.8 108
Hewinta 9500 8.5 7.4 115 11.7 10.4 112
Hickerson Park 9122 8.5 5.5 155 9.0 7.3 123
Hole-in-Rock 9168 8.7 5.2 167 8.7 6.8 128
Indian Creek 9425 18.4 17.8 103 13.1 17.1 77
Kelley R.S. 8180 12.5 11.3 111 13.3 14.0 95
Spirit Lk 10235 13.1 -M * 14.0 -M *
Steel Creek Park 10158 12.0 10.9 110 14.4 11.9 121
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Basin Index (%) 118 104
UPPER BEAR RIVER
Bear River RS 8777 7.3 -M * 8.6 -M *
Bug Lake 7987 16.2 14.1 115 14.8 15.0 99
Burts Miller Ranch 8000 5.3 -M * 5.7 -M *
Chalk Creek #1 9171 15.9 17.3 92 14.9 18.8 79
Hayden Fork 9130 13.1 11.5 114 16.3 15.7 104
Kelley R.S. 8180 12.5 11.3 111 13.3 14.0 95
Lily Lake 9133 9.4 9.8 96 9.6 12.7 76
Monte Cristo 8932 22.6 19.8 114 20.1 19.7 102
Salt River Summit 7640 12.3 10.2 121 12.7 12.9 98
Spring Creek Divide 9000 21.4 17.5 122 20.3 18.6 109
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Basin Index (%) 111 96
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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.