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 MONDAY: FEBRUARY 15 , 2021
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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 13.1 12.6 104 14.8 15.5 95
Blind Bull Sum 8650 15.3 15.9 96 10.6 14.4 74
Cottonwood Creek 7670 15.7 14.6 108 17.6 17.6 100
East Rim Divide 7930 6.8 7.3 93 6.8 8.5 80
Grand Targhee 9260 27.8 26.4 105 21.5 23.0 93
Granite Creek 6770 11.7 12.2 96 13.7 15.0 91
Grassy Lake 7265 21.6 23.8 91 23.7 26.8 88
Gros Ventre Summit 8750 6.3 8.9 71 7.8 9.0 87
Gunsight Pass 9820 8.8 9.4 94 8.2 10.0 82
Lewis Lake Divide 7850 19.9 23.0 87 22.4 25.9 86
Loomis Park 8240 9.6 10.5 91 11.0 12.5 88
Phillips Bench 8200 17.7 17.7 100 18.8 20.3 93
Salt River Summit 7640 8.4 9.2 91 9.5 11.9 80
Snake River Station 6920 11.7 13.0 90 15.1 17.1 88
Somsen Ranch 6800 8.9 9.7 92 10.1 12.3 82
Spring Creek Divide 9000 16.3 16.3 100 16.5 17.3 95
Thumb Divide 7980 10.3 10.6 97 10.7 13.3 80
Togwotee Pass 9580 17.3 16.4 105 18.8 17.6 107
Triple Peak 8500 16.9 15.3 110 17.6 17.9 98
Two Ocean Plateau 9240 19.0 19.4 98 11.1 19.4 57
Willow Creek 8080 18.7 19.3 97 19.7 24.1 82
Younts Peak 8350 11.1 10.7 104 12.3 11.6 106
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Basin Index (%) 97 88
MADISON HEADWATERS IN WYOMING
Black Bear 8170 21.6 27.1 80 21.9 27.6 79
Canyon 7870 9.1 9.3 98 10.0 11.9 84
Madison Plateau 7750 13.9 15.6 89 14.8 19.0 78
West Yellowstone 6700 7.6 7.6 100 9.6 10.7 90
Whiskey Creek 6800 9.6 10.7 90 12.6 14.6 86
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Basin Index (%) 88 82
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.6 15.3 108 16.2 14.3 113
Canyon 7870 9.1 9.3 98 10.0 11.9 84
Evening Star 9200 21.3 17.5 122 23.0 20.1 114
Fisher Creek 9100 24.2 23.0 105 25.8 23.0 112
Monument Peak 8850 16.0 13.5 119 18.6 15.6 119
Northeast Entrance 7350 6.4 7.3 88 12.1 9.1 133
Parker Peak 9400 17.2 14.0 123 17.3 12.7 136
Sylvan Lake 8420 13.3 14.0 95 16.9 16.3 104
Thumb Divide 7980 10.3 10.6 97 10.7 13.3 80
Two Ocean Plateau 9240 19.0 19.4 98 11.1 19.4 57
White Mill 8700 20.2 16.2 125 19.6 17.2 114
Wolverine 7650 8.0 7.8 103 13.4 9.1 147
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Basin Index (%) 108 107
WIND RIVER
Burroughs Creek 8750 7.7 -M * 11.4 -M *
Castle Creek 8400 4.2 -M * 5.9 -M *
Cold Springs 9630 3.7 5.1 73 5.4 6.7 81
Deer Park 9700 6.4 9.7 66 8.5 13.9 61
Grave Springs 8550 3.7 5.5 67 4.4 7.1 62
Hobbs Park 10100 -M 8.5 * -M 8.6 *
Kirwin 9550 6.8 6.2 110 7.8 7.9 99
Little Warm 9370 7.1 7.2 99 9.1 8.9 102
South Pass 9040 -M 10.1 * 7.1 12.1 59
St. Lawrence Alt 8620 .6 4.5 13 2.5 5.8 43
Togwotee Pass 9580 17.3 16.4 105 18.8 17.6 107
Townsend Creek 8700 -M 5.8 * 4.7 7.8 60
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Basin Index (%) 84 78
BIGHORN BASIN
Bald Mtn. 9380 12.5 12.8 98 10.2 11.8 86
Bear Trap Meadow 8200 4.3 3.8 113 6.0 5.6 107
Bone Springs Div 9350 11.2 10.7 105 8.6 10.6 81
Grave Springs 8550 3.7 5.5 67 4.4 7.1 62
Kirwin 9550 6.8 6.2 110 7.8 7.9 99
Marquette 8760 3.1 -M * 4.2 -M *
Middle Powder 7760 5.8 7.1 82 5.5 8.0 69
Owl Creek 8975 2.7 3.3 82 2.8 3.9 72
Powder River Pass 9480 8.3 7.1 117 7.0 8.6 81
Shell Creek 9580 10.8 10.1 107 8.8 9.6 92
Timber Creek 7950 1.8 3.1 58 2.7 4.8 56
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Basin Index (%) 97 82
SHOSHONE RIVER
Blackwater 9780 15.1 15.5 97 16.0 14.6 110
Evening Star 9200 21.3 17.5 122 23.0 20.1 114
Marquette 8760 3.1 -M * 4.2 -M *
Sylvan Lake 8420 13.3 14.0 95 16.9 16.3 104
Sylvan Road 7120 8.7 8.6 101 -M 12.9 *
Younts Peak 8350 11.1 10.7 104 12.3 11.6 106
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Basin Index (%) 105 109
POWDER RIVER
Bear Trap Meadow 8200 4.3 3.8 113 6.0 5.6 107
Cloud Peak Reservoir 9860 8.9 9.5 94 9.2 8.6 107
Grave Springs 8550 3.7 5.5 67 4.4 7.1 62
Hansen Sawmill 8360 4.4 4.3 102 5.2 5.5 95
Middle Powder 7760 5.8 7.1 82 5.5 8.0 69
Powder River Pass 9480 8.3 7.1 117 7.0 8.6 81
Soldier Park 8720 2.4 -M * 5.7 -M *
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Basin Index (%) 95 86
TONGUE RIVER
Big Goose 7990 5.3 5.6 95 8.2 7.2 114
Bone Springs Div 9350 11.2 10.7 105 8.6 10.6 81
Burgess Junction 7880 7.3 7.4 99 9.5 8.2 116
Dome Lake 8880 7.7 7.7 100 9.0 9.1 99
Little Goose 8870 6.9 -M * 9.1 -M *
Sucker Creek 8880 9.2 7.9 116 12.0 9.5 126
Tie Creek 6870 3.0 3.8 79 7.1 7.7 92
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Basin Index (%) 101 104
BELLE FOURCHE
Blind Park 6890 4.1 5.6 73 6.1 8.5 72
Cole Canyon 5910 2.4 4.4 55 5.1 6.5 78
North Rapid Creek 6130 4.3 5.3 81 6.0 6.9 87
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Basin Index (%) 71 79
CHEYENNE RIVER BASIN
Blind Park 6890 4.1 5.6 73 6.1 8.5 72
North Rapid Creek 6130 4.3 5.3 81 6.0 6.9 87
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Basin Index (%) 77 79
UPPER N. PLATTE
Arapaho Ridge 10960 15.5 14.6 106 15.0 16.0 94
Blackhall Mtn 9820 20.1 -M * 20.3 -M *
Cinnabar Park 9574 12.3 15.6 79 13.9 18.0 77
Columbine 9160 16.2 17.1 95 14.7 18.4 80
Divide Peak 8880 10.7 13.9 77 12.6 15.3 82
Joe Wright 10120 12.6 14.4 88 15.7 17.9 88
Laprele Creek 8375 5.1 6.4 80 6.4 8.4 76
Med Bow 10500 27.9 -M * 24.1 -M *
Never Summer 10280 12.7 13.9 91 9.0 -M *
North French Creek 10130 19.5 18.9 103 19.7 18.9 104
Old Battle 10000 20.5 21.7 94 20.5 25.3 81
Rawah 9020 7.1 7.3 97 8.9 9.8 91
Sage Creek Basin 7850 11.1 9.5 117 7.6 10.9 70
Sand Lake 10050 19.2 18.3 105 17.6 16.9 104
South Brush Creek 8440 7.0 8.2 85 7.1 10.5 68
Tower 10500 24.8 32.0 78 24.5 28.6 86
Webber Springs 9250 14.6 16.4 89 15.1 19.0 79
Whiskey Park 8950 20.4 18.8 109 19.2 20.3 95
Willow Creek Pass 9540 8.1 8.4 96 7.1 9.3 76
Zirkel 9340 15.8 20.6 77 19.1 21.3 90
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Basin Index (%) 92 86
SWEETWATER
Deer Park 9700 6.4 9.7 66 8.5 13.9 61
Larsen Creek 9000 4.5 8.4 54 6.2 -M *
South Pass 9040 -M 10.1 * 7.1 12.1 59
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Basin Index (%) 60 60
LOWER N. PLATTE
Casper Mtn. 7900 5.5 8.7 63 5.5 10.0 55
Laprele Creek 8375 5.1 6.4 80 6.4 8.4 76
Reno Hill 8400 6.0 8.6 70 -M 10.0 *
Windy Peak 7900 3.3 5.0 66 5.2 7.1 73
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Basin Index (%) 69 67
LARAMIE RIVER
Brooklyn Lake 10240 16.4 13.6 121 18.1 14.4 126
Cinnabar Park 9574 12.3 15.6 79 13.9 18.0 77
Crow Creek 8330 1.1 6.2 18 4.7 7.1 66
Deadman Hill 10220 11.2 11.3 99 10.6 11.4 93
Rawah 9020 7.1 7.3 97 8.9 9.8 91
Roach 9700 9.3 11.3 82 10.2 13.2 77
Windy Peak 7900 3.3 5.0 66 5.2 7.1 73
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Basin Index (%) 86 88
S. PLATTE
Crow Creek 8330 1.1 6.2 18 4.7 7.1 66
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Basin Index (%) 18 66
LITTLE SNAKE RIVER
Battle Mountain 7440 6.7 8.4 80 9.6 11.0 87
Divide Peak 8880 10.7 13.9 77 12.6 15.3 82
Elk River 8700 11.5 13.5 85 8.5 14.4 59
Elkhead Divide 8780 11.2 -M * 12.4 -M *
Little Snake River 8915 -M 18.0 * -M 23.0 *
Old Battle 10000 20.5 21.7 94 20.5 25.3 81
Sage Creek Basin 7850 11.1 9.5 117 7.6 10.9 70
Sandstone RS 8150 8.6 9.6 90 10.5 13.5 78
Whiskey Park 8950 20.4 18.8 109 19.2 20.3 95
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Basin Index (%) 94 80
UPPER GREEN RIVER
Big Sandy Opening 9080 6.8 8.9 76 6.4 9.3 69
Blind Bull Sum 8650 15.3 15.9 96 10.6 14.4 74
East Rim Divide 7930 6.8 7.3 93 6.8 8.5 80
Elkhart Park G.S. 9400 7.1 8.4 85 6.0 9.3 65
Gros Ventre Summit 8750 6.3 8.9 71 7.8 9.0 87
Gunsight Pass 9820 8.8 9.4 94 8.2 10.0 82
Indian Creek 9425 13.7 16.3 84 12.3 15.8 78
Kendall R.S. 7740 9.0 8.8 102 10.2 10.3 99
Larsen Creek 9000 4.5 8.4 54 6.2 -M *
Loomis Park 8240 9.6 10.5 91 11.0 12.5 88
New Fork Lake 8340 6.8 7.4 92 7.3 7.8 94
Pocket Creek 9360 -M -M * 5.8 -M *
Snider Basin 8060 9.0 8.9 101 10.5 10.3 102
Spring Creek Divide 9000 16.3 16.3 100 16.5 17.3 95
Triple Peak 8500 16.9 15.3 110 17.6 17.9 98
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Basin Index (%) 91 86
LOWER GREEN RIVER
Blacks Fork Jct 8869 -M -M * -M -M *
Buck Pasture 9632 8.0 -M * 8.7 -M *
EF Blacks Fork GS 9360 8.0 -M * 6.7 -M *
Hams Fork 7840 8.5 8.2 104 7.8 8.2 95
Henrys Fork 10182 -M -M * 6.9 -M *
Hewinta 9500 5.6 6.8 82 8.3 9.7 86
Hickerson Park 9122 4.1 4.9 84 5.1 6.8 75
Hole-in-Rock 9168 3.6 4.7 77 5.6 6.4 88
Indian Creek 9425 13.7 16.3 84 12.3 15.8 78
Kelley R.S. 8180 9.8 10.3 95 10.8 13.0 83
Spirit Lk 10235 6.9 -M * 7.9 -M *
Steel Creek Park 10158 8.9 10.1 88 10.2 11.1 92
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Basin Index (%) 88 85
UPPER BEAR RIVER
Bear River RS 8777 4.7 -M * 6.6 -M *
Bug Lake 7987 10.7 13.0 82 10.5 13.8 76
Burts Miller Ranch 8000 3.0 -M * 5.2 -M *
Chalk Creek #1 9171 9.6 15.7 61 11.2 17.5 64
Dry Bread Pond 8302 9.7 13.8 70 10.2 14.0 73
Giveout 6930 5.7 7.3 78 8.0 9.3 86
Hayden Fork 9130 7.9 10.6 75 11.5 14.7 78
Kelley R.S. 8180 9.8 10.3 95 10.8 13.0 83
Lily Lake 9133 6.3 8.7 72 7.5 11.9 63
Monte Cristo 8932 13.4 18.4 73 12.7 18.2 70
Salt River Summit 7640 8.4 9.2 91 9.5 11.9 80
Spring Creek Divide 9000 16.3 16.3 100 16.5 17.3 95
Trial Lake 9992 11.1 15.4 72 11.2 16.6 67
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Basin Index (%) 79 76
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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.