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: MARCH 1 , 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 13.3 13.5 99 13.9 17.2 81
Black Bear 8170 26.4 29.6 89 24.7 30.8 80
Blind Bull Sum 8650 21.0 17.9 117 12.3 16.0 77
Cottonwood Creek 7670 22.8 16.9 135 23.9 19.6 122
East Rim Divide 7930 10.2 8.1 126 8.2 9.6 85
Grand Targhee 9260 33.6 30.2 111 23.8 24.8 96
Granite Creek 6770 13.9 13.8 101 13.1 16.5 79
Grassy Lake 7265 25.9 26.2 99 26.0 29.4 88
Gros Ventre Summit 8750 9.2 9.7 95 9.2 10.1 91
Gunsight Pass 9820 10.5 10.6 99 10.5 10.9 96
Lewis Lake Divide 7850 20.0 25.2 79 23.3 28.7 81
Phillips Bench 8200 23.3 19.7 118 22.6 22.7 100
Salt River Summit 7640 12.7 10.6 120 12.9 13.4 96
Snake River Station 6920 13.9 14.2 98 16.2 18.7 87
Spring Creek Divide 9000 21.7 18.6 117 20.6 19.3 107
Thumb Divide 7980 11.5 12.3 93 11.5 14.6 79
Togwotee Pass 9580 22.3 17.7 126 21.4 19.4 110
Two Ocean Plateau 9240 23.2 21.6 107 18.8 21.6 87
Willow Creek 8080 29.1 22.2 131 28.5 26.8 106
Younts Peak 8350 14.2 11.7 121 11.7 12.6 93
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Basin Index (%) 108 92
MADISON-GALLATIN
Black Bear 8170 26.4 29.6 89 24.7 30.8 80
Canyon 7870 11.0 10.5 105 11.3 13.0 87
Madison Plateau 7750 16.4 17.8 92 14.2 21.2 67
West Yellowstone 6700 8.8 9.0 98 7.4 11.7 63
Whiskey Creek 6800 11.8 12.0 98 13.5 16.3 83
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Basin Index (%) 94 76
YELLOWSTONE
Beartooth Lake 9360 18.3 16.7 110 16.8 15.7 107
Burnt Mtn 5880 5.5 4.0 138 10.7 9.5 113
Canyon 7870 11.0 10.5 105 11.3 13.0 87
Cole Creek 7850 14.4 9.9 145 10.8 9.1 119
Evening Star 9200 22.2 19.1 116 24.1 22.1 109
Fisher Creek 9100 25.3 25.8 98 26.1 25.5 102
Northeast Entrance 7350 8.9 8.2 109 10.0 9.9 101
Parker Peak 9400 20.9 16.0 131 19.2 14.0 137
Sylvan Lake 8420 16.7 15.9 105 18.5 18.0 103
Thumb Divide 7980 11.5 12.3 93 11.5 14.6 79
Two Ocean Plateau 9240 23.2 21.6 107 18.8 21.6 87
White Mill 8700 20.7 18.3 113 17.0 18.9 90
Wolverine 7650 11.4 8.5 134 10.9 10.0 109
Younts Peak 8350 14.2 11.7 121 11.7 12.6 93
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Basin Index (%) 113 101
WIND RIVER
Burroughs Creek 8750 9.8 -M * 11.3 -M *
Castle Creek 8400 4.3 -M * 5.1 -M *
Cold Springs 9630 6.1 5.5 111 6.0 7.5 80
Deer Park 9700 9.6 10.8 89 9.0 15.3 59
Hobbs Park 10100 10.0 9.7 103 8.6 9.5 91
Kirwin 9550 9.1 7.0 130 7.8 8.8 89
Little Warm 9370 9.2 7.9 116 7.5 9.8 77
Owl Creek 8975 5.0 3.9 128 5.5 4.3 128
South Pass 9040 8.8 11.4 77 8.0 13.5 59
St. Lawrence Alt 8620 4.0 5.2 77 5.3 6.5 82
Togwotee Pass 9580 22.3 17.7 126 21.4 19.4 110
Townsend Creek 8700 7.2 6.5 111 7.4 8.6 86
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Basin Index (%) 107 84
BIGHORN BASIN
Bald Mtn. 9380 18.5 14.7 126 14.3 13.1 109
Bear Trap Meadow 8200 8.1 4.4 184 8.3 6.1 136
Bone Springs Div 9350 14.5 12.0 121 12.2 11.7 104
Grave Springs 8550 9.1 6.9 132 9.6 7.9 122
Kirwin 9550 9.1 7.0 130 7.8 8.8 89
Marquette 8760 5.7 -M * 7.1 -M *
Middle Powder 7760 10.8 8.0 135 10.7 8.7 123
Owl Creek 8975 5.0 3.9 128 5.5 4.3 128
Powder River Pass 9480 10.5 8.0 131 10.6 9.6 110
Shell Creek 9580 12.6 11.6 109 12.0 10.7 112
Timber Creek 7950 4.9 3.7 132 5.6 5.3 106
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Basin Index (%) 129 112
SHOSHONE RIVER
Blackwater 9780 17.7 17.2 103 17.9 16.1 111
Evening Star 9200 22.2 19.1 116 24.1 22.1 109
Marquette 8760 5.7 -M * 7.1 -M *
Sylvan Lake 8420 16.7 15.9 105 18.5 18.0 103
Sylvan Road 7120 10.3 9.4 110 -M 13.9 *
Younts Peak 8350 14.2 11.7 121 11.7 12.6 93
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Basin Index (%) 111 105
POWDER RIVER
Bear Trap Meadow 8200 8.1 4.4 184 8.3 6.1 136
Cloud Peak Reservoir 9860 11.6 10.4 112 11.2 9.6 117
Grave Springs 8550 9.1 6.9 132 9.6 7.9 122
Hansen Sawmill 8360 5.8 4.7 123 6.9 6.1 113
Middle Powder 7760 10.8 8.0 135 10.7 8.7 123
Powder River Pass 9480 10.5 8.0 131 10.6 9.6 110
Soldier Park 8720 4.6 -M * 7.1 -M *
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Basin Index (%) 132 119
TONGUE RIVER
Big Goose 7990 7.4 6.2 119 8.1 7.9 103
Bone Springs Div 9350 14.5 12.0 121 12.2 11.7 104
Burgess Junction 7880 9.7 8.3 117 10.8 9.0 120
Dome Lake 8880 10.6 8.7 122 8.1 10.0 81
Little Goose 8870 8.8 -M * 6.9 -M *
Sucker Creek 8880 11.7 8.9 131 11.1 10.6 105
Tie Creek 6870 7.7 4.3 179 11.3 8.4 135
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Basin Index (%) 127 107
BELLE FOURCHE
Blind Park 6890 7.3 6.4 114 7.4 9.4 79
Cole Canyon 5910 2.0 5.0 40 -M 7.1 *
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Basin Index (%) 82 79
CHEYENNE RIVER BASIN
Blind Park 6890 7.3 6.4 114 7.4 9.4 79
North Rapid Creek 6130 6.9 5.9 117 7.3 7.6 96
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Basin Index (%) 115 86
UPPER N. PLATTE
Arapaho Ridge 10960 18.8 16.7 113 18.1 17.7 102
Blackhall Mtn 9820 24.6 -M * 23.8 -M *
Columbine 9160 27.6 19.8 139 25.1 20.3 124
Divide Peak 8880 17.8 15.8 113 18.4 16.8 110
Joe Wright 10120 18.1 16.6 109 22.6 19.9 114
Laprele Creek 8375 10.9 7.8 140 11.1 9.3 119
Med Bow 10500 37.6 -M * 30.5 -M *
Never Summer 10280 16.7 16.2 103 12.3 -M *
North French Creek 10130 29.3 21.1 139 28.1 21.1 133
Old Battle 10000 25.7 23.9 108 23.6 27.9 85
Rawah 9020 11.1 8.8 126 12.5 10.9 115
Sage Creek Basin 7850 13.5 10.6 127 10.8 11.7 92
Sand Lake 10050 24.7 21.2 117 22.7 18.9 120
South Brush Creek 8440 11.6 10.3 113 11.5 11.7 98
Tower 10500 39.2 36.3 108 32.9 31.8 103
Webber Springs 9250 18.1 18.7 97 19.5 21.1 92
Whiskey Park 8950 29.4 21.5 137 27.5 22.4 123
Willow Creek Pass 9540 11.2 9.5 118 10.6 10.4 102
Zirkel 9340 24.8 23.0 108 26.5 23.4 113
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Basin Index (%) 117 109
SWEETWATER
Deer Park 9700 9.6 10.8 89 9.0 15.3 59
Larsen Creek 9000 -M 9.5 * 6.1 -M *
South Pass 9040 8.8 11.4 77 8.0 13.5 59
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Basin Index (%) 83 59
LOWER N. PLATTE
Casper Mtn. 7900 13.8 10.2 135 9.4 11.1 85
Laprele Creek 8375 10.9 7.8 140 11.1 9.3 119
Reno Hill 8400 14.4 10.0 144 14.8 11.1 133
Windy Peak 7900 8.7 5.7 153 7.3 7.8 94
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Basin Index (%) 142 108
LARAMIE RIVER
Brooklyn Lake 10240 23.3 15.0 155 22.5 16.0 141
Cinnabar Park 9574 20.9 17.1 122 22.6 19.7 115
Crow Creek 8330 7.2 6.7 107 9.3 7.8 119
Deadman Hill 10220 15.4 12.4 124 13.4 12.7 106
Rawah 9020 11.1 8.8 126 12.5 10.9 115
Roach 9700 12.4 12.4 100 12.3 14.7 84
Windy Peak 7900 8.7 5.7 153 7.3 7.8 94
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Basin Index (%) 127 111
S. PLATTE
Black Mountain 8920 9.0 -M * 10.8 -M *
Crow Creek 8330 7.2 6.7 107 9.3 7.8 119
Deadman Hill 10220 15.4 12.4 124 13.4 12.7 106
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Basin Index (%) 118 111
LITTLE SNAKE RIVER
Battle Mountain 7440 12.5 9.9 126 12.7 12.1 105
Divide Peak 8880 17.8 15.8 113 18.4 16.8 110
Elk River 8700 18.4 15.5 119 15.4 15.9 97
Little Snake River 8915 23.8 19.7 121 28.0 24.9 112
Old Battle 10000 25.7 23.9 108 23.6 27.9 85
Sage Creek Basin 7850 13.5 10.6 127 10.8 11.7 92
Sandstone RS 8150 14.6 10.4 140 13.6 15.0 91
Whiskey Park 8950 29.4 21.5 137 27.5 22.4 123
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Basin Index (%) 122 102
UPPER GREEN RIVER
Big Sandy Opening 9080 7.5 10.1 74 6.3 10.5 60
Blind Bull Sum 8650 21.0 17.9 117 12.3 16.0 77
East Rim Divide 7930 10.2 8.1 126 8.2 9.6 85
Elkhart Park G.S. 9400 8.9 9.4 95 8.4 10.5 80
Gros Ventre Summit 8750 9.2 9.7 95 9.2 10.1 91
Gunsight Pass 9820 10.5 10.6 99 10.5 10.9 96
Indian Creek 9425 19.0 19.0 100 13.4 17.8 75
Kendall R.S. 7740 8.8 9.7 91 8.9 11.7 76
Loomis Park 8240 12.2 11.7 104 15.1 14.0 108
New Fork Lake 8340 9.0 8.2 110 7.3 8.8 83
Pocket Creek 9360 -M -M * 6.3 -M *
Snider Basin 8060 11.8 9.6 123 12.2 11.5 106
Spring Creek Divide 9000 21.7 18.6 117 20.6 19.3 107
Triple Peak 8500 22.3 16.8 133 22.3 20.2 110
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Basin Index (%) 108 91
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.5 -M * 9.8 -M *
Buck Pasture 9632 14.8 -M * 14.3 -M *
EF Blacks Fork GS 9360 12.1 -M * 7.8 -M *
Hams Fork 7840 10.9 9.2 118 9.6 9.1 105
Hewinta 9500 8.7 7.9 110 12.0 10.8 111
Hickerson Park 9122 8.6 5.9 146 9.1 7.6 120
Hole-in-Rock 9168 8.8 5.6 157 8.8 7.1 124
Indian Creek 9425 19.0 19.0 100 13.4 17.8 75
Kelley R.S. 8180 12.9 12.1 107 13.7 14.6 94
Spirit Lk 10235 13.4 -M * 14.2 -M *
Steel Creek Park 10158 13.8 11.5 120 14.7 12.4 119
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Basin Index (%) 116 102
UPPER BEAR RIVER
Bear River RS 8777 7.5 -M * 8.8 -M *
Bug Lake 7987 16.0 14.8 108 14.9 15.5 96
Burts Miller Ranch 8000 5.3 -M * 5.7 -M *
Chalk Creek #1 9171 16.1 18.3 88 14.9 19.4 77
Hayden Fork 9130 13.4 12.1 111 16.5 16.4 101
Kelley R.S. 8180 12.9 12.1 107 13.7 14.6 94
Lily Lake 9133 9.7 10.3 94 9.8 13.2 74
Monte Cristo 8932 22.8 21.0 109 20.2 20.5 99
Salt River Summit 7640 12.7 10.6 120 12.9 13.4 96
Spring Creek Divide 9000 21.7 18.6 117 20.6 19.3 107
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Basin Index (%) 106 93
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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.