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 15 , 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 12.2 12.6 97 12.7 15.5 82
Black Bear 8170 25.0 27.1 92 23.6 27.6 86
Blind Bull Sum 8650 19.2 15.9 121 11.5 14.4 80
Cottonwood Creek 7670 21.0 14.6 144 22.1 17.6 126
East Rim Divide 7930 9.3 7.3 127 7.4 8.5 87
Grand Targhee 9260 30.5 26.4 116 21.5 23.0 93
Granite Creek 6770 12.1 12.2 99 11.9 15.0 79
Grassy Lake 7265 23.8 23.8 100 23.9 26.8 89
Gros Ventre Summit 8750 8.4 8.9 94 8.2 9.0 91
Gunsight Pass 9820 9.7 9.4 103 9.7 10.0 97
Lewis Lake Divide 7850 18.5 23.0 80 21.8 25.9 84
Phillips Bench 8200 21.3 17.7 120 20.6 20.3 101
Salt River Summit 7640 11.7 9.2 127 11.9 11.9 100
Snake River Station 6920 12.6 13.0 97 14.9 17.1 87
Spring Creek Divide 9000 20.1 16.3 123 19.3 17.3 112
Thumb Divide 7980 10.6 10.6 100 10.8 13.3 81
Togwotee Pass 9580 19.6 16.4 120 18.6 17.6 106
Two Ocean Plateau 9240 21.6 19.4 111 16.9 19.4 87
Willow Creek 8080 26.7 19.3 138 26.9 24.1 112
Younts Peak 8350 12.8 10.7 120 10.5 11.6 91
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Basin Index (%) 110 94
MADISON-GALLATIN
Black Bear 8170 25.0 27.1 92 23.6 27.6 86
Canyon 7870 10.2 9.3 110 10.4 11.9 87
Madison Plateau 7750 15.6 15.6 100 -M 19.0 *
West Yellowstone 6700 8.4 7.6 111 7.2 10.7 67
Whiskey Creek 6800 11.2 10.7 105 12.8 14.6 88
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Basin Index (%) 100 83
YELLOWSTONE
Beartooth Lake 9360 16.6 15.3 108 15.3 14.3 107
Burnt Mtn 5880 4.8 3.4 141 9.5 8.6 110
Canyon 7870 10.2 9.3 110 10.4 11.9 87
Cole Creek 7850 13.6 8.8 155 10.1 8.3 122
Evening Star 9200 20.2 17.5 115 21.9 20.1 109
Fisher Creek 9100 23.5 23.0 102 24.0 23.0 104
Northeast Entrance 7350 8.3 7.3 114 9.4 9.1 103
Parker Peak 9400 19.1 14.0 136 17.1 12.7 135
Sylvan Lake 8420 15.5 14.0 111 17.2 16.3 106
Thumb Divide 7980 10.6 10.6 100 10.8 13.3 81
Two Ocean Plateau 9240 21.6 19.4 111 16.9 19.4 87
White Mill 8700 19.2 16.2 119 15.7 17.2 91
Wolverine 7650 10.5 7.8 135 10.1 9.1 111
Younts Peak 8350 12.8 10.7 120 10.5 11.6 91
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Basin Index (%) 116 102
WIND RIVER
Burroughs Creek 8750 8.5 -M * 9.9 -M *
Castle Creek 8400 3.8 -M * 4.4 -M *
Cold Springs 9630 5.6 5.1 110 5.4 6.7 81
Deer Park 9700 9.1 9.7 94 8.0 13.9 58
Hobbs Park 10100 9.2 8.5 108 7.9 8.6 92
Kirwin 9550 8.4 6.2 135 7.1 7.9 90
Little Warm 9370 8.2 7.2 114 6.5 8.9 73
Owl Creek 8975 4.7 3.3 142 5.0 3.9 128
South Pass 9040 8.1 10.1 80 7.2 12.1 60
St. Lawrence Alt 8620 3.8 4.5 84 5.2 5.8 90
Togwotee Pass 9580 19.6 16.4 120 18.6 17.6 106
Townsend Creek 8700 6.8 5.8 117 6.9 7.8 88
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Basin Index (%) 109 83
BIGHORN BASIN
Bald Mtn. 9380 16.7 12.8 130 12.8 11.8 108
Bear Trap Meadow 8200 -M 3.8 * 7.5 5.6 134
Bone Springs Div 9350 13.2 10.7 123 11.0 10.6 104
Grave Springs 8550 8.4 5.5 153 8.9 7.1 125
Kirwin 9550 8.4 6.2 135 7.1 7.9 90
Marquette 8760 5.3 -M * 6.5 -M *
Middle Powder 7760 9.9 7.1 139 10.1 8.0 126
Owl Creek 8975 4.7 3.3 142 5.0 3.9 128
Powder River Pass 9480 9.7 7.1 137 9.5 8.6 110
Shell Creek 9580 11.1 10.1 110 10.9 9.6 114
Timber Creek 7950 4.8 3.1 155 5.4 4.8 112
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Basin Index (%) 132 113
SHOSHONE RIVER
Blackwater 9780 16.2 15.5 105 16.0 14.6 110
Evening Star 9200 20.2 17.5 115 21.9 20.1 109
Marquette 8760 5.3 -M * 6.5 -M *
Sylvan Lake 8420 15.5 14.0 111 17.2 16.3 106
Sylvan Road 7120 9.3 8.6 108 12.8 12.9 99
Younts Peak 8350 12.8 10.7 120 10.5 11.6 91
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Basin Index (%) 112 104
POWDER RIVER
Bear Trap Meadow 8200 -M 3.8 * 7.5 5.6 134
Cloud Peak Reservoir 9860 10.3 9.5 108 9.7 8.6 113
Grave Springs 8550 8.4 5.5 153 8.9 7.1 125
Hansen Sawmill 8360 5.3 4.3 123 6.4 5.5 116
Middle Powder 7760 9.9 7.1 139 10.1 8.0 126
Powder River Pass 9480 9.7 7.1 137 9.5 8.6 110
Soldier Park 8720 3.8 -M * 6.4 -M *
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Basin Index (%) 130 120
TONGUE RIVER
Big Goose 7990 6.5 5.6 116 7.6 7.2 106
Bone Springs Div 9350 13.2 10.7 123 11.0 10.6 104
Burgess Junction 7880 8.8 7.4 119 9.8 8.2 120
Dome Lake 8880 9.1 7.7 118 7.1 9.1 78
Little Goose 8870 7.7 -M * 6.2 -M *
Sucker Creek 8880 10.6 7.9 134 9.5 9.5 100
Tie Creek 6870 6.9 3.8 182 10.4 7.7 135
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Basin Index (%) 128 106
BELLE FOURCHE
Blind Park 6890 6.2 5.6 111 6.7 8.5 79
Cole Canyon 5910 2.3 4.4 52 -M 6.5 *
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Basin Index (%) 85 79
CHEYENNE RIVER BASIN
Blind Park 6890 6.2 5.6 111 6.7 8.5 79
North Rapid Creek 6130 5.7 5.3 108 6.7 6.9 97
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Basin Index (%) 109 87
UPPER N. PLATTE
Arapaho Ridge 10960 16.7 14.6 114 16.3 16.0 102
Blackhall Mtn 9820 21.5 -M * 21.3 -M *
Columbine 9160 23.4 17.1 137 21.4 18.4 116
Divide Peak 8880 16.2 13.9 117 17.1 15.3 112
Joe Wright 10120 15.0 14.4 104 19.6 17.9 109
Laprele Creek 8375 9.2 6.4 144 9.3 8.4 111
Med Bow 10500 33.1 -M * 27.2 -M *
Never Summer 10280 14.9 13.9 107 11.0 -M *
North French Creek 10130 26.1 18.9 138 25.1 18.9 133
Old Battle 10000 23.6 21.7 109 21.7 25.3 86
Rawah 9020 10.2 7.3 140 11.6 9.8 118
Sage Creek Basin 7850 12.5 9.5 132 10.2 10.9 94
Sand Lake 10050 22.3 18.3 122 20.6 16.9 122
South Brush Creek 8440 10.6 8.2 129 10.6 10.5 101
Tower 10500 33.8 32.0 106 29.7 28.6 104
Webber Springs 9250 16.4 16.4 100 17.9 19.0 94
Whiskey Park 8950 25.4 18.8 135 24.6 20.3 121
Willow Creek Pass 9540 10.0 8.4 119 9.4 9.3 101
Zirkel 9340 21.7 20.6 105 24.1 21.3 113
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Basin Index (%) 118 108
SWEETWATER
Deer Park 9700 9.1 9.7 94 8.0 13.9 58
Larsen Creek 9000 -M 8.4 * 5.6 -M *
South Pass 9040 8.1 10.1 80 7.2 12.1 60
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Basin Index (%) 87 58
LOWER N. PLATTE
Casper Mtn. 7900 12.7 8.7 146 8.7 10.0 87
Laprele Creek 8375 9.2 6.4 144 9.3 8.4 111
Reno Hill 8400 12.5 8.6 145 12.7 10.0 127
Windy Peak 7900 7.3 5.0 146 6.1 7.1 86
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Basin Index (%) 145 104
LARAMIE RIVER
Brooklyn Lake 10240 20.2 13.6 149 19.6 14.4 136
Cinnabar Park 9574 18.5 15.6 119 19.9 18.0 111
Crow Creek 8330 7.0 6.2 113 8.9 7.1 125
Deadman Hill 10220 13.8 11.3 122 12.1 11.4 106
Rawah 9020 10.2 7.3 140 11.6 9.8 118
Roach 9700 11.3 11.3 100 11.0 13.2 83
Windy Peak 7900 7.3 5.0 146 6.1 7.1 86
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Basin Index (%) 126 110
S. PLATTE
Black Mountain 8920 8.7 -M * 10.3 -M *
Crow Creek 8330 7.0 6.2 113 8.9 7.1 125
Deadman Hill 10220 13.8 11.3 122 12.1 11.4 106
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Basin Index (%) 119 114
LITTLE SNAKE RIVER
Battle Mountain 7440 11.6 8.4 138 11.6 11.0 105
Divide Peak 8880 16.2 13.9 117 17.1 15.3 112
Elk River 8700 16.3 13.5 121 13.7 14.4 95
Little Snake River 8915 21.2 18.0 118 25.6 23.0 111
Old Battle 10000 23.6 21.7 109 21.7 25.3 86
Sage Creek Basin 7850 12.5 9.5 132 10.2 10.9 94
Sandstone RS 8150 13.3 9.6 139 12.4 13.5 92
Whiskey Park 8950 25.4 18.8 135 24.6 20.3 121
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Basin Index (%) 124 102
UPPER GREEN RIVER
Big Sandy Opening 9080 7.0 8.9 79 6.0 9.3 65
Blind Bull Sum 8650 19.2 15.9 121 11.5 14.4 80
East Rim Divide 7930 9.3 7.3 127 7.4 8.5 87
Elkhart Park G.S. 9400 8.1 8.4 96 7.7 9.3 83
Gros Ventre Summit 8750 8.4 8.9 94 8.2 9.0 91
Gunsight Pass 9820 9.7 9.4 103 9.7 10.0 97
Indian Creek 9425 17.3 16.3 106 12.4 15.8 78
Kendall R.S. 7740 7.9 8.8 90 7.9 10.3 77
Loomis Park 8240 11.0 10.5 105 13.5 12.5 108
New Fork Lake 8340 8.3 7.4 112 -M 7.8 *
Pocket Creek 9360 -M -M * 5.7 -M *
Snider Basin 8060 10.7 8.9 120 11.1 10.3 108
Spring Creek Divide 9000 20.1 16.3 123 19.3 17.3 112
Triple Peak 8500 20.4 15.3 133 20.4 17.9 114
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Basin Index (%) 111 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.0 -M * 9.2 -M *
Buck Pasture 9632 13.9 -M * 13.6 -M *
EF Blacks Fork GS 9360 11.5 -M * 7.6 -M *
Hams Fork 7840 10.0 8.2 122 8.9 8.2 109
Hewinta 9500 8.2 6.8 121 11.2 9.7 115
Hickerson Park 9122 8.3 4.9 169 8.8 6.8 129
Hole-in-Rock 9168 8.4 4.7 179 8.5 6.4 133
Indian Creek 9425 17.3 16.3 106 12.4 15.8 78
Kelley R.S. 8180 11.7 10.3 114 12.6 13.0 97
Spirit Lk 10235 12.9 -M * 13.7 -M *
Steel Creek Park 10158 11.7 10.1 116 13.8 11.1 124
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Basin Index (%) 123 107
UPPER BEAR RIVER
Bear River RS 8777 6.9 -M * 8.2 -M *
Bug Lake 7987 15.2 13.0 117 14.0 13.8 101
Burts Miller Ranch 8000 5.2 -M * 5.4 -M *
Chalk Creek #1 9171 15.0 15.7 96 14.0 17.5 80
Hayden Fork 9130 12.3 10.6 116 15.4 14.7 105
Kelley R.S. 8180 11.7 10.3 114 12.6 13.0 97
Lily Lake 9133 8.8 8.7 101 9.1 11.9 76
Monte Cristo 8932 21.3 18.4 116 19.0 18.2 104
Salt River Summit 7640 11.7 9.2 127 11.9 11.9 100
Spring Creek Divide 9000 20.1 16.3 123 19.3 17.3 112
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Basin Index (%) 114 97
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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.