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 WEDNESDAY: MARCH 11 , 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 14.0 13.8 101 14.5 18.3 79
Black Bear 8170 28.4 31.5 90 26.6 33.1 80
Blind Bull Sum 8650 22.0 19.4 113 13.1 16.9 78
Cottonwood Creek 7670 24.0 18.5 130 25.5 20.7 123
East Rim Divide 7930 10.8 9.4 115 8.5 10.2 83
Grand Targhee 9260 34.6 31.9 108 24.6 25.7 96
Granite Creek 6770 14.6 14.6 100 -M 17.5 *
Grassy Lake 7265 27.4 27.6 99 27.3 31.2 88
Gros Ventre Summit 8750 9.9 10.9 91 9.5 10.9 87
Gunsight Pass 9820 10.9 11.6 94 10.8 11.6 93
Lewis Lake Divide 7850 21.1 26.5 80 24.4 30.8 79
Phillips Bench 8200 24.1 21.2 114 23.4 24.2 97
Salt River Summit 7640 13.3 11.2 119 13.3 14.2 94
Snake River Station 6920 14.3 15.2 94 17.0 19.6 87
Spring Creek Divide 9000 22.5 19.6 115 21.4 20.4 105
Thumb Divide 7980 12.6 13.2 95 12.3 15.8 78
Togwotee Pass 9580 23.2 19.5 119 22.3 20.7 108
Two Ocean Plateau 9240 24.8 23.1 107 20.2 23.3 87
Willow Creek 8080 31.6 24.1 131 30.4 28.5 107
Younts Peak 8350 15.0 12.4 121 12.0 13.4 90
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Basin Index (%) 106 92
MADISON-GALLATIN
Black Bear 8170 28.4 31.5 90 26.6 33.1 80
Canyon 7870 11.9 11.5 103 12.0 14.0 86
Madison Plateau 7750 17.7 19.3 92 15.5 22.8 68
West Yellowstone 6700 9.6 9.7 99 7.8 12.4 63
Whiskey Creek 6800 12.7 13.2 96 14.6 17.4 84
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Basin Index (%) 94 77
YELLOWSTONE
Beartooth Lake 9360 19.3 18.4 105 17.9 16.8 107
Burnt Mtn 5880 5.7 4.3 133 10.8 10.2 106
Canyon 7870 11.9 11.5 103 12.0 14.0 86
Cole Creek 7850 14.6 11.2 130 11.0 9.9 111
Evening Star 9200 23.6 20.9 113 25.6 23.4 109
Fisher Creek 9100 27.0 27.0 100 27.6 27.2 101
Northeast Entrance 7350 9.2 8.6 107 10.4 10.5 99
Parker Peak 9400 22.0 16.7 132 20.1 15.0 134
Sylvan Lake 8420 17.7 17.0 104 19.5 19.0 103
Thumb Divide 7980 12.6 13.2 95 12.3 15.8 78
Two Ocean Plateau 9240 24.8 23.1 107 20.2 23.3 87
White Mill 8700 21.8 19.2 114 18.0 20.3 89
Wolverine 7650 11.6 9.0 129 11.4 10.5 109
Younts Peak 8350 15.0 12.4 121 12.0 13.4 90
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Basin Index (%) 111 100
WIND RIVER
Burroughs Creek 8750 10.5 -M * 11.8 -M *
Castle Creek 8400 4.5 -M * 5.2 -M *
Cold Springs 9630 6.4 5.9 108 6.2 8.0 78
Deer Park 9700 10.7 12.1 88 9.4 16.3 58
Hobbs Park 10100 11.1 11.0 101 9.3 10.4 89
Kirwin 9550 9.5 7.8 122 8.3 9.4 88
Little Warm 9370 9.7 8.7 111 7.6 10.5 72
Owl Creek 8975 5.4 4.3 126 5.8 4.6 126
South Pass 9040 9.5 12.5 76 8.3 14.5 57
St. Lawrence Alt 8620 4.5 5.9 76 6.1 7.0 87
Togwotee Pass 9580 23.2 19.5 119 22.3 20.7 108
Townsend Creek 8700 7.8 7.4 105 8.0 9.4 85
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Basin Index (%) 103 82
BIGHORN BASIN
Bald Mtn. 9380 18.9 16.0 118 14.6 13.9 105
Bear Trap Meadow 8200 8.3 4.7 177 8.4 6.6 127
Bone Springs Div 9350 15.4 13.3 116 12.5 12.6 99
Grave Springs 8550 9.2 7.5 123 9.6 8.3 116
Kirwin 9550 9.5 7.8 122 8.3 9.4 88
Marquette 8760 5.8 -M * 7.5 -M *
Middle Powder 7760 11.2 8.8 127 11.0 9.3 118
Owl Creek 8975 5.4 4.3 126 5.8 4.6 126
Powder River Pass 9480 11.2 8.5 132 11.3 10.2 111
Shell Creek 9580 13.2 12.3 107 12.6 11.2 112
Timber Creek 7950 5.1 4.1 124 5.9 5.6 105
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Basin Index (%) 123 109
SHOSHONE RIVER
Blackwater 9780 18.8 19.1 98 19.0 17.2 110
Evening Star 9200 23.6 20.9 113 25.6 23.4 109
Marquette 8760 5.8 -M * 7.5 -M *
Sylvan Lake 8420 17.7 17.0 104 19.5 19.0 103
Sylvan Road 7120 10.4 10.0 104 -M 14.6 *
Younts Peak 8350 15.0 12.4 121 12.0 13.4 90
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Basin Index (%) 108 104
POWDER RIVER
Bear Trap Meadow 8200 8.3 4.7 177 8.4 6.6 127
Cloud Peak Reservoir 9860 12.6 11.8 107 11.7 10.3 114
Grave Springs 8550 9.2 7.5 123 9.6 8.3 116
Hansen Sawmill 8360 6.3 5.2 121 7.4 6.5 114
Middle Powder 7760 11.2 8.8 127 11.0 9.3 118
Powder River Pass 9480 11.2 8.5 132 11.3 10.2 111
Soldier Park 8720 5.9 -M * 7.7 -M *
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Basin Index (%) 126 116
TONGUE RIVER
Big Goose 7990 7.9 6.9 114 8.7 8.4 104
Bone Springs Div 9350 15.4 13.3 116 12.5 12.6 99
Burgess Junction 7880 10.0 9.3 108 11.2 9.7 115
Dome Lake 8880 12.0 9.4 128 8.3 10.6 78
Little Goose 8870 9.4 -M * 7.3 -M *
Sucker Creek 8880 12.1 10.1 120 11.4 11.4 100
Tie Creek 6870 7.7 4.7 164 11.6 9.0 129
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Basin Index (%) 121 103
BELLE FOURCHE
Blind Park 6890 7.4 6.8 109 7.7 10.0 77
Cole Canyon 5910 -M 5.1 * -M 7.4 *
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Basin Index (%) 109 77
CHEYENNE RIVER BASIN
Blind Park 6890 7.4 6.8 109 7.7 10.0 77
North Rapid Creek 6130 7.2 6.3 114 7.4 8.1 91
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Basin Index (%) 111 83
UPPER N. PLATTE
Arapaho Ridge 10960 19.9 17.7 112 19.2 18.8 102
Blackhall Mtn 9820 26.1 -M * 25.3 -M *
Columbine 9160 29.3 21.1 139 26.1 21.8 120
Divide Peak 8880 18.5 17.0 109 19.1 18.0 106
Joe Wright 10120 19.0 18.4 103 23.4 21.4 109
Laprele Creek 8375 11.1 8.5 131 11.4 10.1 113
Med Bow 10500 39.1 -M * 30.9 -M *
Never Summer 10280 17.2 17.0 101 12.8 -M *
North French Creek 10130 30.3 23.0 132 28.7 22.5 128
Old Battle 10000 27.2 25.6 106 25.1 29.8 84
Rawah 9020 11.2 9.3 120 12.9 11.5 112
Sage Creek Basin 7850 14.5 11.6 125 10.9 12.4 88
Sand Lake 10050 25.9 22.6 115 23.8 20.4 117
South Brush Creek 8440 12.1 11.1 109 11.8 12.6 94
Tower 10500 40.8 38.2 107 36.9 33.9 109
Webber Springs 9250 19.3 20.2 96 21.1 22.6 93
Whiskey Park 8950 30.4 23.3 130 28.5 23.9 119
Willow Creek Pass 9540 11.4 10.3 111 10.9 11.0 99
Zirkel 9340 26.3 25.2 104 27.5 24.6 112
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Basin Index (%) 114 107
SWEETWATER
Deer Park 9700 10.7 12.1 88 9.4 16.3 58
Larsen Creek 9000 -M 10.4 * 6.6 -M *
South Pass 9040 9.5 12.5 76 8.3 14.5 57
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Basin Index (%) 82 57
LOWER N. PLATTE
Casper Mtn. 7900 14.2 11.5 123 9.5 11.9 80
Laprele Creek 8375 11.1 8.5 131 11.4 10.1 113
Reno Hill 8400 14.8 11.2 132 15.2 12.0 127
Windy Peak 7900 8.9 6.6 135 7.7 8.5 91
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Basin Index (%) 130 103
LARAMIE RIVER
Brooklyn Lake 10240 24.4 16.8 145 23.3 17.4 134
Cinnabar Park 9574 21.5 17.8 121 23.3 20.6 113
Crow Creek 8330 6.9 7.1 97 10.0 8.4 119
Deadman Hill 10220 15.8 13.0 122 13.9 14.0 99
Rawah 9020 11.2 9.3 120 12.9 11.5 112
Roach 9700 12.6 13.4 94 12.9 15.9 81
Windy Peak 7900 8.9 6.6 135 7.7 8.5 91
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Basin Index (%) 121 108
S. PLATTE
Black Mountain 8920 8.9 -M * 11.1 -M *
Crow Creek 8330 6.9 7.1 97 10.0 8.4 119
Deadman Hill 10220 15.8 13.0 122 13.9 14.0 99
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Basin Index (%) 113 107
LITTLE SNAKE RIVER
Battle Mountain 7440 12.6 10.6 119 12.9 12.9 100
Divide Peak 8880 18.5 17.0 109 19.1 18.0 106
Elk River 8700 18.8 16.9 111 15.8 17.1 92
Little Snake River 8915 24.8 20.3 122 29.2 25.8 113
Old Battle 10000 27.2 25.6 106 25.1 29.8 84
Sage Creek Basin 7850 14.5 11.6 125 10.9 12.4 88
Sandstone RS 8150 15.1 11.8 128 14.0 16.0 88
Whiskey Park 8950 30.4 23.3 130 28.5 23.9 119
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Basin Index (%) 118 100
UPPER GREEN RIVER
Big Sandy Opening 9080 7.9 10.8 73 6.8 11.2 61
Blind Bull Sum 8650 22.0 19.4 113 13.1 16.9 78
East Rim Divide 7930 10.8 9.4 115 8.5 10.2 83
Elkhart Park G.S. 9400 9.3 10.1 92 9.1 11.1 82
Gros Ventre Summit 8750 9.9 10.9 91 9.5 10.9 87
Gunsight Pass 9820 10.9 11.6 94 10.8 11.6 93
Indian Creek 9425 19.6 20.3 97 13.9 19.0 73
Kendall R.S. 7740 9.2 10.5 88 9.2 12.5 74
Loomis Park 8240 12.8 12.7 101 15.5 14.9 104
New Fork Lake 8340 9.4 9.0 104 -M 9.3 *
Pocket Creek 9360 -M -M * 6.6 -M *
Snider Basin 8060 12.2 10.6 115 12.5 12.2 102
Spring Creek Divide 9000 22.5 19.6 115 21.4 20.4 105
Triple Peak 8500 23.4 18.6 126 23.3 21.6 108
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Basin Index (%) 104 89
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.1 -M * 10.4 -M *
Buck Pasture 9632 15.7 -M * 14.9 -M *
EF Blacks Fork GS 9360 12.5 -M * 8.2 -M *
Hams Fork 7840 11.5 10.0 115 9.7 9.6 101
Hewinta 9500 9.8 8.6 114 12.4 11.5 108
Hickerson Park 9122 9.5 6.4 148 9.6 8.1 119
Hole-in-Rock 9168 9.4 6.1 154 9.2 7.6 121
Indian Creek 9425 19.6 20.3 97 13.9 19.0 73
Kelley R.S. 8180 13.4 12.7 106 14.1 15.4 92
Spirit Lk 10235 14.3 -M * 15.3 -M *
Steel Creek Park 10158 14.6 12.6 116 15.4 13.3 116
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Basin Index (%) 114 100
UPPER BEAR RIVER
Bear River RS 8777 8.3 -M * 9.4 -M *
Bug Lake 7987 16.7 16.1 104 15.4 16.4 94
Burts Miller Ranch 8000 6.2 -M * 6.2 -M *
Chalk Creek #1 9171 17.6 20.0 88 16.0 20.8 77
Hayden Fork 9130 14.3 13.4 107 17.5 17.4 101
Kelley R.S. 8180 13.4 12.7 106 14.1 15.4 92
Lily Lake 9133 10.5 11.1 95 10.6 14.1 75
Monte Cristo 8932 24.3 22.9 106 21.2 21.8 97
Salt River Summit 7640 13.3 11.2 119 13.3 14.2 94
Spring Creek Divide 9000 22.5 19.6 115 21.4 20.4 105
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Basin Index (%) 104 92
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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.