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 FRIDAY: FEBRUARY 21 , 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 13.0 99 13.3 16.4 81
Black Bear 8170 25.9 28.0 92 24.2 29.1 83
Blind Bull Sum 8650 20.4 17.1 119 12.1 15.2 80
Cottonwood Creek 7670 22.1 15.7 141 23.0 18.5 124
East Rim Divide 7930 9.7 7.5 129 7.8 9.0 87
Grand Targhee 9260 33.0 27.9 118 23.0 23.7 97
Granite Creek 6770 -M 13.0 * -M 15.7 *
Grassy Lake 7265 25.0 24.8 101 24.7 28.1 88
Gros Ventre Summit 8750 8.5 9.3 91 8.4 9.5 88
Gunsight Pass 9820 10.1 10.0 101 10.0 10.2 98
Lewis Lake Divide 7850 19.5 24.4 80 22.8 27.4 83
Phillips Bench 8200 22.3 18.7 119 21.6 21.5 100
Salt River Summit 7640 12.3 10.0 123 12.4 12.8 97
Snake River Station 6920 13.4 13.6 99 15.6 17.8 88
Spring Creek Divide 9000 21.2 17.2 123 20.2 18.3 110
Thumb Divide 7980 10.8 11.2 96 11.0 13.9 79
Togwotee Pass 9580 21.1 16.9 125 20.1 18.4 109
Two Ocean Plateau 9240 22.2 20.4 109 17.4 20.5 85
Willow Creek 8080 28.3 20.7 137 27.9 25.2 111
Younts Peak 8350 13.2 11.2 118 10.8 12.1 89
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Basin Index (%) 111 94
MADISON-GALLATIN
Black Bear 8170 25.9 28.0 92 24.2 29.1 83
Canyon 7870 10.6 9.9 107 10.7 12.5 86
Madison Plateau 7750 16.0 16.7 96 13.8 20.0 69
West Yellowstone 6700 8.7 8.2 106 7.4 11.1 67
Whiskey Creek 6800 11.4 11.3 101 12.9 15.4 84
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Basin Index (%) 98 78
YELLOWSTONE
Beartooth Lake 9360 17.3 15.8 109 16.0 15.0 107
Burnt Mtn 5880 5.0 3.8 132 9.8 9.0 109
Canyon 7870 10.6 9.9 107 10.7 12.5 86
Cole Creek 7850 13.7 9.0 152 10.4 8.6 121
Evening Star 9200 21.6 18.4 117 23.4 21.0 111
Fisher Creek 9100 24.4 24.6 99 24.9 24.2 103
Northeast Entrance 7350 8.7 7.6 114 9.6 9.5 101
Parker Peak 9400 19.8 14.9 133 17.7 13.3 133
Sylvan Lake 8420 16.3 15.0 109 17.8 17.1 104
Thumb Divide 7980 10.8 11.2 96 11.0 13.9 79
Two Ocean Plateau 9240 22.2 20.4 109 17.4 20.5 85
White Mill 8700 19.9 17.2 116 16.3 18.1 90
Wolverine 7650 11.2 8.2 137 10.7 9.5 113
Younts Peak 8350 13.2 11.2 118 10.8 12.1 89
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Basin Index (%) 115 101
WIND RIVER
Burroughs Creek 8750 9.3 -M * 10.2 -M *
Castle Creek 8400 4.1 -M * 4.7 -M *
Cold Springs 9630 5.9 5.3 111 5.7 7.1 80
Deer Park 9700 9.5 10.2 93 8.6 14.3 60
Hobbs Park 10100 9.7 9.0 108 8.4 9.0 93
Kirwin 9550 8.6 6.4 134 7.4 8.3 89
Little Warm 9370 -M 7.7 * -M 9.3 *
Owl Creek 8975 4.9 3.6 136 5.2 4.1 127
South Pass 9040 8.6 10.6 81 7.7 12.8 60
St. Lawrence Alt 8620 4.0 4.9 82 5.2 6.1 85
Togwotee Pass 9580 21.1 16.9 125 20.1 18.4 109
Townsend Creek 8700 6.9 6.1 113 7.2 8.2 88
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Basin Index (%) 108 86
BIGHORN BASIN
Bald Mtn. 9380 17.3 13.8 125 13.4 12.3 109
Bear Trap Meadow 8200 7.7 4.0 192 7.9 5.8 136
Bone Springs Div 9350 13.6 11.2 121 11.4 11.0 104
Grave Springs 8550 -M 6.0 * -M 7.4 *
Kirwin 9550 8.6 6.4 134 7.4 8.3 89
Marquette 8760 5.5 -M * 6.7 -M *
Middle Powder 7760 10.4 7.4 141 10.4 8.3 125
Owl Creek 8975 4.9 3.6 136 5.2 4.1 127
Powder River Pass 9480 10.1 7.5 135 10.0 9.0 111
Shell Creek 9580 11.7 10.5 111 11.4 10.0 114
Timber Creek 7950 4.9 3.1 158 5.4 4.9 110
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Basin Index (%) 132 112
SHOSHONE RIVER
Blackwater 9780 17.0 16.3 104 17.3 15.3 113
Evening Star 9200 21.6 18.4 117 23.4 21.0 111
Marquette 8760 5.5 -M * 6.7 -M *
Sylvan Lake 8420 16.3 15.0 109 17.8 17.1 104
Sylvan Road 7120 9.7 8.8 110 13.5 13.4 101
Younts Peak 8350 13.2 11.2 118 10.8 12.1 89
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Basin Index (%) 112 105
POWDER RIVER
Bear Trap Meadow 8200 7.7 4.0 192 7.9 5.8 136
Cloud Peak Reservoir 9860 10.6 9.9 107 10.3 9.0 114
Grave Springs 8550 -M 6.0 * -M 7.4 *
Hansen Sawmill 8360 5.7 4.4 130 6.8 5.7 119
Middle Powder 7760 10.4 7.4 141 10.4 8.3 125
Powder River Pass 9480 10.1 7.5 135 10.0 9.0 111
Soldier Park 8720 -M -M * -M -M *
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Basin Index (%) 134 120
TONGUE RIVER
Big Goose 7990 7.0 5.9 119 8.6 7.5 115
Bone Springs Div 9350 13.6 11.2 121 11.4 11.0 104
Burgess Junction 7880 9.0 7.7 117 10.0 8.5 118
Dome Lake 8880 9.6 8.1 119 7.7 9.5 81
Little Goose 8870 8.3 -M * 6.6 -M *
Sucker Creek 8880 11.0 8.3 133 10.0 10.0 100
Tie Creek 6870 7.2 4.1 176 10.8 7.9 137
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Basin Index (%) 127 108
BELLE FOURCHE
Blind Park 6890 6.2 5.9 105 6.7 8.9 75
Cole Canyon 5910 1.9 4.7 40 -M 6.8 *
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Basin Index (%) 76 75
CHEYENNE RIVER BASIN
Blind Park 6890 6.2 5.9 105 6.7 8.9 75
North Rapid Creek 6130 5.8 5.6 104 6.8 7.2 94
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Basin Index (%) 104 84
UPPER N. PLATTE
Arapaho Ridge 10960 17.8 15.5 115 17.2 16.7 103
Blackhall Mtn 9820 -M -M * -M -M *
Columbine 9160 25.6 18.4 139 -M 19.3 *
Divide Peak 8880 -M 14.8 * -M 16.1 *
Joe Wright 10120 16.6 15.4 108 21.3 18.8 113
Laprele Creek 8375 -M 7.1 * -M 8.9 *
Med Bow 10500 36.1 -M * 29.2 -M *
Never Summer 10280 16.0 14.8 108 11.6 -M *
North French Creek 10130 27.8 19.7 141 26.8 19.9 135
Old Battle 10000 25.1 22.9 110 23.2 26.7 87
Rawah 9020 10.4 7.8 133 11.8 10.2 116
Sage Creek Basin 7850 13.1 10.4 126 10.6 11.3 94
Sand Lake 10050 -M 19.6 * -M 17.9 *
South Brush Creek 8440 11.1 9.3 119 11.1 11.0 101
Tower 10500 37.2 34.4 108 31.6 30.2 105
Webber Springs 9250 17.4 17.6 99 18.8 20.1 94
Whiskey Park 8950 27.8 20.0 139 26.6 21.3 125
Willow Creek Pass 9540 10.9 9.0 121 10.0 9.8 102
Zirkel 9340 23.4 21.9 107 25.6 22.3 115
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Basin Index (%) 118 107
SWEETWATER
Deer Park 9700 9.5 10.2 93 8.6 14.3 60
Larsen Creek 9000 -M 8.9 * 5.8 -M *
South Pass 9040 8.6 10.6 81 7.7 12.8 60
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Basin Index (%) 87 60
LOWER N. PLATTE
Casper Mtn. 7900 13.0 9.5 137 8.9 10.5 85
Laprele Creek 8375 -M 7.1 * -M 8.9 *
Reno Hill 8400 13.1 9.3 141 13.4 10.5 128
Windy Peak 7900 7.8 5.4 144 6.3 7.4 85
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Basin Index (%) 140 101
LARAMIE RIVER
Brooklyn Lake 10240 22.4 14.4 156 21.6 15.2 142
Cinnabar Park 9574 -M 16.2 * -M 19.0 *
Crow Creek 8330 7.0 6.6 106 9.0 7.5 120
Deadman Hill 10220 -M 11.9 * -M 12.1 *
Rawah 9020 10.4 7.8 133 11.8 10.2 116
Roach 9700 11.6 12.0 97 11.3 13.9 81
Windy Peak 7900 7.8 5.4 144 6.3 7.4 85
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Basin Index (%) 128 111
S. PLATTE
Black Mountain 8920 -M -M * -M -M *
Crow Creek 8330 7.0 6.6 106 9.0 7.5 120
Deadman Hill 10220 -M 11.9 * -M 12.1 *
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Basin Index (%) 106* 120*
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 9.0 * -M 11.6 *
Divide Peak 8880 -M 14.8 * -M 16.1 *
Elk River 8700 -M 14.2 * -M 15.2 *
Little Snake River 8915 -M 18.9 * -M 24.2 *
Old Battle 10000 25.1 22.9 110 23.2 26.7 87
Sage Creek Basin 7850 13.1 10.4 126 10.6 11.3 94
Sandstone RS 8150 14.1 10.2 138 13.3 14.3 93
Whiskey Park 8950 27.8 20.0 139 26.6 21.3 125
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Basin Index (%) 126 100
UPPER GREEN RIVER
Big Sandy Opening 9080 7.2 9.4 77 6.1 9.9 62
Blind Bull Sum 8650 20.4 17.1 119 12.1 15.2 80
East Rim Divide 7930 9.7 7.5 129 7.8 9.0 87
Elkhart Park G.S. 9400 8.5 8.9 96 8.0 9.9 81
Gros Ventre Summit 8750 8.5 9.3 91 8.4 9.5 88
Gunsight Pass 9820 10.1 10.0 101 10.0 10.2 98
Indian Creek 9425 -M 17.4 * -M 16.8 *
Kendall R.S. 7740 -M 9.3 * -M 11.0 *
Loomis Park 8240 -M 11.0 * -M 13.3 *
New Fork Lake 8340 8.6 7.7 112 -M 8.2 *
Pocket Creek 9360 -M -M * 6.0 -M *
Snider Basin 8060 -M 9.1 * -M 10.9 *
Spring Creek Divide 9000 21.2 17.2 123 20.2 18.3 110
Triple Peak 8500 21.6 16.0 135 21.3 19.0 112
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Basin Index (%) 112 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 -M -M * -M -M *
Buck Pasture 9632 -M -M * -M -M *
EF Blacks Fork GS 9360 11.8 -M * 7.7 -M *
Hams Fork 7840 10.3 8.7 118 9.3 8.7 107
Hewinta 9500 -M 7.3 * -M 10.2 *
Hickerson Park 9122 8.3 5.3 157 8.9 7.1 125
Hole-in-Rock 9168 8.4 5.1 165 8.5 6.7 127
Indian Creek 9425 -M 17.4 * -M 16.8 *
Kelley R.S. 8180 -M 11.0 * -M 13.8 *
Spirit Lk 10235 13.0 -M * 13.8 -M *
Steel Creek Park 10158 12.3 10.7 115 14.3 11.7 122
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Basin Index (%) 132* 120*
UPPER BEAR RIVER
Bear River RS 8777 7.2 -M * 8.5 -M *
Bug Lake 7987 16.1 13.8 117 14.7 14.7 100
Burts Miller Ranch 8000 5.3 -M * 5.5 -M *
Chalk Creek #1 9171 15.9 17.0 94 14.9 18.6 80
Hayden Fork 9130 -M 11.4 * -M 15.5 *
Kelley R.S. 8180 -M 11.0 * -M 13.8 *
Lily Lake 9133 9.3 9.6 97 9.6 12.6 76
Monte Cristo 8932 22.6 19.6 115 20.0 19.5 103
Salt River Summit 7640 12.3 10.0 123 12.4 12.8 97
Spring Creek Divide 9000 21.2 17.2 123 20.2 18.3 110
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Basin Index (%) 112 95
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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.