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 THURSDAY: FEBRUARY 27 , 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 13.2 13.3 99 13.7 17.1 80
Black Bear 8170 26.2 29.1 90 24.5 30.5 80
Blind Bull Sum 8650 20.8 17.6 118 12.2 15.8 77
Cottonwood Creek 7670 22.7 16.4 138 23.8 19.4 123
East Rim Divide 7930 10.1 7.9 128 8.1 9.5 85
Grand Targhee 9260 33.6 29.4 114 23.2 24.6 94
Granite Creek 6770 13.6 13.5 101 -M 16.4 *
Grassy Lake 7265 25.7 25.7 100 25.7 29.2 88
Gros Ventre Summit 8750 8.9 9.5 94 8.9 10.0 89
Gunsight Pass 9820 10.4 10.4 100 10.4 10.7 97
Lewis Lake Divide 7850 19.9 25.1 79 23.2 28.5 81
Phillips Bench 8200 23.0 19.4 119 22.2 22.5 99
Salt River Summit 7640 12.5 10.4 120 12.7 13.3 95
Snake River Station 6920 13.8 14.0 99 16.2 18.5 88
Spring Creek Divide 9000 21.7 18.1 120 20.6 19.1 108
Thumb Divide 7980 11.2 11.9 94 11.4 14.5 79
Togwotee Pass 9580 21.9 17.5 125 20.9 19.2 109
Two Ocean Plateau 9240 23.0 21.4 107 17.9 21.5 83
Willow Creek 8080 28.9 22.0 131 28.4 26.6 107
Younts Peak 8350 14.0 11.5 122 11.6 12.5 93
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Basin Index (%) 109 92
MADISON-GALLATIN
Black Bear 8170 26.2 29.1 90 24.5 30.5 80
Canyon 7870 10.8 10.4 104 11.0 12.9 85
Madison Plateau 7750 16.2 17.6 92 14.0 21.0 67
West Yellowstone 6700 8.8 8.8 100 7.4 11.5 64
Whiskey Creek 6800 11.6 11.9 97 13.3 16.1 83
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Basin Index (%) 95 76
YELLOWSTONE
Beartooth Lake 9360 17.9 16.2 110 16.5 15.6 106
Burnt Mtn 5880 5.4 4.0 135 10.5 9.2 114
Canyon 7870 10.8 10.4 104 11.0 12.9 85
Cole Creek 7850 14.3 9.5 151 10.7 8.9 120
Evening Star 9200 22.1 18.9 117 23.9 21.9 109
Fisher Creek 9100 25.1 25.4 99 25.8 25.2 102
Northeast Entrance 7350 8.9 7.9 113 10.0 9.8 102
Parker Peak 9400 20.6 15.8 130 18.9 13.8 137
Sylvan Lake 8420 16.7 15.7 106 18.4 17.8 103
Thumb Divide 7980 11.2 11.9 94 11.4 14.5 79
Two Ocean Plateau 9240 23.0 21.4 107 17.9 21.5 83
White Mill 8700 20.5 18.0 114 16.8 18.8 89
Wolverine 7650 11.3 8.5 133 10.8 9.9 109
Younts Peak 8350 14.0 11.5 122 11.6 12.5 93
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Basin Index (%) 114 101
WIND RIVER
Burroughs Creek 8750 9.6 -M * 10.8 -M *
Castle Creek 8400 4.3 -M * 5.0 -M *
Cold Springs 9630 6.0 5.4 111 5.8 7.4 78
Deer Park 9700 9.6 10.8 89 8.8 15.0 59
Hobbs Park 10100 9.9 9.4 105 8.5 9.3 91
Kirwin 9550 8.9 6.8 131 7.7 8.7 89
Little Warm 9370 8.9 7.8 114 7.3 9.8 74
Owl Creek 8975 5.0 3.8 132 5.4 4.2 129
South Pass 9040 8.8 11.2 79 7.8 13.3 59
St. Lawrence Alt 8620 4.0 5.0 80 5.3 6.4 83
Togwotee Pass 9580 21.9 17.5 125 20.9 19.2 109
Townsend Creek 8700 7.1 6.3 113 7.3 8.5 86
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Basin Index (%) 107 83
BIGHORN BASIN
Bald Mtn. 9380 18.4 14.4 128 14.2 12.9 110
Bear Trap Meadow 8200 8.0 4.3 186 8.1 6.0 135
Bone Springs Div 9350 14.5 11.6 125 11.9 11.6 103
Grave Springs 8550 9.0 6.6 136 -M 7.7 *
Kirwin 9550 8.9 6.8 131 7.7 8.7 89
Marquette 8760 5.7 -M * 7.0 -M *
Middle Powder 7760 10.9 7.8 140 10.6 8.6 123
Owl Creek 8975 5.0 3.8 132 5.4 4.2 129
Powder River Pass 9480 10.5 7.8 135 10.4 9.4 111
Shell Creek 9580 12.4 11.3 110 11.9 10.4 114
Timber Creek 7950 5.0 3.3 152 5.6 5.1 110
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Basin Index (%) 132 112
SHOSHONE RIVER
Blackwater 9780 17.6 16.9 104 17.6 15.9 111
Evening Star 9200 22.1 18.9 117 23.9 21.9 109
Marquette 8760 5.7 -M * 7.0 -M *
Sylvan Lake 8420 16.7 15.7 106 18.4 17.8 103
Sylvan Road 7120 10.2 9.2 111 -M 13.8 *
Younts Peak 8350 14.0 11.5 122 11.6 12.5 93
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Basin Index (%) 112 105
POWDER RIVER
Bear Trap Meadow 8200 8.0 4.3 186 8.1 6.0 135
Cloud Peak Reservoir 9860 11.3 10.2 111 10.8 9.4 115
Grave Springs 8550 9.0 6.6 136 -M 7.7 *
Hansen Sawmill 8360 5.8 4.6 126 6.9 5.9 117
Middle Powder 7760 10.9 7.8 140 10.6 8.6 123
Powder River Pass 9480 10.5 7.8 135 10.4 9.4 111
Soldier Park 8720 4.6 -M * 7.1 -M *
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Basin Index (%) 134 119
TONGUE RIVER
Big Goose 7990 7.4 6.1 121 8.6 7.7 112
Bone Springs Div 9350 14.5 11.6 125 11.9 11.6 103
Burgess Junction 7880 9.7 8.1 120 10.8 8.9 121
Dome Lake 8880 10.5 8.5 124 8.0 9.8 82
Little Goose 8870 8.8 -M * 6.7 -M *
Sucker Creek 8880 11.6 8.7 133 10.7 10.4 103
Tie Creek 6870 7.6 4.2 181 11.2 8.2 137
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Basin Index (%) 130 108
BELLE FOURCHE
Blind Park 6890 7.0 6.3 111 7.1 9.2 77
Cole Canyon 5910 2.1 5.0 42 -M 7.0 *
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Basin Index (%) 81 77
CHEYENNE RIVER BASIN
Blind Park 6890 7.0 6.3 111 7.1 9.2 77
North Rapid Creek 6130 6.7 5.8 116 7.3 7.5 97
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Basin Index (%) 113 86
UPPER N. PLATTE
Arapaho Ridge 10960 18.7 16.3 115 18.0 17.4 103
Blackhall Mtn 9820 24.4 -M * 23.7 -M *
Columbine 9160 27.3 19.4 141 24.8 20.2 123
Divide Peak 8880 17.6 15.4 114 18.3 16.6 110
Joe Wright 10120 18.0 16.2 111 22.4 19.7 114
Laprele Creek 8375 10.8 7.6 142 10.9 9.2 118
Med Bow 10500 37.4 -M * 30.0 -M *
Never Summer 10280 16.6 15.9 104 12.3 -M *
North French Creek 10130 29.1 20.8 140 27.8 20.8 134
Old Battle 10000 25.6 23.7 108 23.4 27.5 85
Rawah 9020 -M 8.5 * -M 10.7 *
Sage Creek Basin 7850 13.3 10.5 127 10.8 11.5 94
Sand Lake 10050 24.4 20.8 117 22.5 18.6 121
South Brush Creek 8440 11.5 10.0 115 11.3 11.6 97
Tower 10500 39.0 35.7 109 32.7 31.5 104
Webber Springs 9250 17.9 18.4 97 19.4 20.9 93
Whiskey Park 8950 29.1 21.0 139 27.4 22.1 124
Willow Creek Pass 9540 11.2 9.3 120 10.5 10.2 103
Zirkel 9340 24.4 22.7 107 -M 23.2 *
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Basin Index (%) 118 109
SWEETWATER
Deer Park 9700 9.6 10.8 89 8.8 15.0 59
Larsen Creek 9000 -M 9.3 * 6.0 -M *
South Pass 9040 8.8 11.2 79 7.8 13.3 59
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Basin Index (%) 84 59
LOWER N. PLATTE
Casper Mtn. 7900 13.9 9.9 140 9.3 10.9 85
Laprele Creek 8375 10.8 7.6 142 10.9 9.2 118
Reno Hill 8400 14.3 9.7 147 14.5 10.9 133
Windy Peak 7900 8.6 5.7 151 7.0 7.7 91
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Basin Index (%) 145 108
LARAMIE RIVER
Brooklyn Lake 10240 23.2 14.7 158 22.2 15.8 141
Cinnabar Park 9574 20.6 16.8 123 22.2 19.4 114
Crow Creek 8330 7.2 6.6 109 9.4 7.7 122
Deadman Hill 10220 15.3 12.3 124 13.3 12.6 106
Rawah 9020 -M 8.5 * -M 10.7 *
Roach 9700 12.1 12.2 99 11.9 14.5 82
Windy Peak 7900 8.6 5.7 151 7.0 7.7 91
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Basin Index (%) 127 111
S. PLATTE
Black Mountain 8920 9.0 -M * 10.8 -M *
Crow Creek 8330 7.2 6.6 109 9.4 7.7 122
Deadman Hill 10220 15.3 12.3 124 13.3 12.6 106
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Basin Index (%) 119 112
LITTLE SNAKE RIVER
Battle Mountain 7440 12.4 9.7 128 12.5 12.0 104
Divide Peak 8880 17.6 15.4 114 18.3 16.6 110
Elk River 8700 18.4 15.0 123 15.4 15.8 97
Little Snake River 8915 23.7 19.6 121 28.0 24.7 113
Old Battle 10000 25.6 23.7 108 23.4 27.5 85
Sage Creek Basin 7850 13.3 10.5 127 10.8 11.5 94
Sandstone RS 8150 14.5 10.3 141 13.6 14.9 91
Whiskey Park 8950 29.1 21.0 139 27.4 22.1 124
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Basin Index (%) 123 103
UPPER GREEN RIVER
Big Sandy Opening 9080 7.4 9.8 76 6.3 10.4 61
Blind Bull Sum 8650 20.8 17.6 118 12.2 15.8 77
East Rim Divide 7930 10.1 7.9 128 8.1 9.5 85
Elkhart Park G.S. 9400 8.8 9.3 95 8.3 10.4 80
Gros Ventre Summit 8750 8.9 9.5 94 8.9 10.0 89
Gunsight Pass 9820 10.4 10.4 100 10.4 10.7 97
Indian Creek 9425 18.9 18.5 102 13.3 17.6 76
Kendall R.S. 7740 8.7 9.7 90 8.7 11.6 75
Loomis Park 8240 12.1 11.6 104 14.9 13.9 107
New Fork Lake 8340 8.9 8.1 110 -M 8.7 *
Pocket Creek 9360 -M -M * 6.2 -M *
Snider Basin 8060 11.8 9.4 126 12.2 11.4 107
Spring Creek Divide 9000 21.7 18.1 120 20.6 19.1 108
Triple Peak 8500 22.2 16.5 135 22.2 20.0 111
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Basin Index (%) 109 91
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.4 -M * 9.8 -M *
Buck Pasture 9632 14.9 -M * 14.4 -M *
EF Blacks Fork GS 9360 12.1 -M * 7.9 -M *
Hams Fork 7840 10.9 9.1 120 9.6 9.1 105
Hewinta 9500 8.8 7.7 114 11.9 10.7 111
Hickerson Park 9122 8.7 5.7 153 9.1 7.4 123
Hole-in-Rock 9168 8.8 5.5 160 8.8 7.0 126
Indian Creek 9425 18.9 18.5 102 13.3 17.6 76
Kelley R.S. 8180 12.8 11.9 108 13.6 14.4 94
Spirit Lk 10235 13.3 -M * 14.2 -M *
Steel Creek Park 10158 13.8 11.3 122 14.7 12.2 120
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Basin Index (%) 119 103
UPPER BEAR RIVER
Bear River RS 8777 7.5 -M * 8.7 -M *
Bug Lake 7987 16.2 14.5 112 14.8 15.3 97
Burts Miller Ranch 8000 5.2 -M * 5.7 -M *
Chalk Creek #1 9171 16.0 17.9 89 14.9 19.2 78
Hayden Fork 9130 13.3 11.8 113 16.5 16.2 102
Kelley R.S. 8180 12.8 11.9 108 13.6 14.4 94
Lily Lake 9133 9.7 10.0 97 9.8 13.0 75
Monte Cristo 8932 22.8 20.4 112 20.1 20.3 99
Salt River Summit 7640 12.5 10.4 120 12.7 13.3 95
Spring Creek Divide 9000 21.7 18.1 120 20.6 19.1 108
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Basin Index (%) 109 94
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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.