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: MARCH 29 , 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 15.7 14.7 107 17.7 19.9 89
Blind Bull Sum 8650 19.7 21.8 90 13.0 18.5 70
Cottonwood Creek 7670 19.6 20.9 94 22.8 23.3 98
East Rim Divide 7930 8.5 9.8 87 8.2 11.2 73
Grand Targhee 9260 35.3 35.4 100 28.1 28.7 98
Granite Creek 6770 15.3 14.9 103 15.7 18.9 83
Grassy Lake 7265 28.9 31.3 92 30.5 34.2 89
Gros Ventre Summit 8750 9.6 12.6 76 9.9 12.2 81
Gunsight Pass 9820 11.2 13.1 85 10.6 12.9 82
Lewis Lake Divide 7850 25.1 29.3 86 28.6 33.6 85
Loomis Park 8240 11.6 14.4 81 13.1 16.4 80
Phillips Bench 8200 22.3 23.8 94 23.2 26.7 87
Salt River Summit 7640 11.5 12.7 91 12.4 15.8 78
Snake River Station 6920 14.7 15.8 93 19.1 21.4 89
Somsen Ranch 6800 10.6 12.2 87 13.3 15.6 85
Spring Creek Divide 9000 21.3 22.4 95 21.4 22.6 95
Thumb Divide 7980 13.2 15.1 87 13.4 17.5 77
Togwotee Pass 9580 21.3 21.5 99 23.5 22.9 103
Triple Peak 8500 20.9 21.1 99 21.8 24.0 91
Two Ocean Plateau 9240 24.3 25.3 96 14.1 25.8 55
Willow Creek 8080 25.9 27.0 96 25.5 31.6 81
Younts Peak 8350 14.0 13.9 101 14.7 14.9 99
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Basin Index (%) 93 85
MADISON HEADWATERS IN WYOMING
Black Bear 8170 29.8 35.4 84 29.8 36.1 83
Canyon 7870 12.3 12.2 101 13.6 15.2 89
Madison Plateau 7750 19.3 21.1 91 19.8 24.9 80
West Yellowstone 6700 10.5 10.2 103 12.7 13.3 95
Whiskey Creek 6800 13.6 14.8 92 17.0 19.1 89
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Basin Index (%) 91 86
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 20.4 20.7 99 19.8 18.5 107
Canyon 7870 12.3 12.2 101 13.6 15.2 89
Evening Star 9200 26.2 23.8 110 28.0 25.7 109
Fisher Creek 9100 29.5 29.4 100 31.5 30.0 105
Monument Peak 8850 21.2 18.3 116 23.3 20.3 115
Northeast Entrance 7350 8.7 9.8 89 14.5 11.5 126
Parker Peak 9400 22.6 18.5 122 22.6 16.5 137
Sylvan Lake 8420 17.4 18.9 92 21.9 21.0 104
Thumb Divide 7980 13.2 15.1 87 13.4 17.5 77
Two Ocean Plateau 9240 24.3 25.3 96 14.1 25.8 55
White Mill 8700 24.9 21.3 117 23.6 22.3 106
Wolverine 7650 10.2 8.9 115 15.4 11.4 135
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Basin Index (%) 104 103
WIND RIVER
Burroughs Creek 8750 10.5 -M * 14.0 -M *
Castle Creek 8400 5.4 -M * 7.4 -M *
Cold Springs 9630 6.8 7.1 96 8.9 9.2 97
Deer Park 9700 12.4 14.3 87 15.0 18.3 82
Hobbs Park 10100 12.0 13.0 92 12.4 12.1 102
Kirwin 9550 9.2 9.1 101 10.3 10.7 96
Little Warm 9370 9.7 10.1 96 12.0 12.0 100
South Pass 9040 12.0 14.6 82 13.0 16.3 80
St. Lawrence Alt 8620 3.8 6.7 57 5.8 8.2 71
Togwotee Pass 9580 21.3 21.5 99 23.5 22.9 103
Townsend Creek 8700 9.2 8.8 105 11.1 11.0 101
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Basin Index (%) 92 93
BIGHORN BASIN
Bald Mtn. 9380 16.4 17.8 92 14.9 15.9 94
Bear Trap Meadow 8200 9.0 5.1 176 10.5 7.7 136
Bone Springs Div 9350 15.2 15.1 101 11.6 14.4 81
Grave Springs 8550 7.6 8.6 88 8.5 9.7 88
Kirwin 9550 9.2 9.1 101 10.3 10.7 96
Marquette 8760 4.9 -M * 6.6 -M *
Middle Powder 7760 11.5 10.8 106 9.8 10.8 91
Owl Creek 8975 5.7 5.1 112 5.8 5.5 105
Powder River Pass 9480 11.4 9.8 116 10.3 11.6 89
Shell Creek 9580 14.6 14.0 104 11.8 12.8 92
Timber Creek 7950 3.4 4.5 76 4.9 6.8 72
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Basin Index (%) 104 93
SHOSHONE RIVER
Blackwater 9780 19.8 21.7 91 21.3 19.2 111
Evening Star 9200 26.2 23.8 110 28.0 25.7 109
Marquette 8760 4.9 -M * 6.6 -M *
Sylvan Lake 8420 17.4 18.9 92 21.9 21.0 104
Sylvan Road 7120 10.0 11.0 91 -M 15.8 *
Younts Peak 8350 14.0 13.9 101 14.7 14.9 99
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Basin Index (%) 98 106
POWDER RIVER
Bear Trap Meadow 8200 9.0 5.1 176 10.5 7.7 136
Cloud Peak Reservoir 9860 15.6 13.7 114 15.4 12.2 126
Grave Springs 8550 7.6 8.6 88 8.5 9.7 88
Hansen Sawmill 8360 9.7 6.2 156 10.2 7.9 129
Middle Powder 7760 11.5 10.8 106 9.8 10.8 91
Powder River Pass 9480 11.4 9.8 116 10.3 11.6 89
Soldier Park 8720 7.7 -M * 10.9 -M *
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Basin Index (%) 120 108
TONGUE RIVER
Big Goose 7990 9.3 8.4 111 11.8 10.1 117
Bone Springs Div 9350 15.2 15.1 101 11.6 14.4 81
Burgess Junction 7880 10.6 10.9 97 13.0 11.4 114
Dome Lake 8880 12.9 11.2 115 13.3 12.5 106
Little Goose 8870 12.2 -M * 13.8 -M *
Sucker Creek 8880 13.8 11.2 123 16.8 13.2 127
Tie Creek 6870 5.7 5.4 106 10.4 10.5 99
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Basin Index (%) 109 107
BELLE FOURCHE
Blind Park 6890 4.4 7.2 61 8.2 11.0 75
Cole Canyon 5910 4.2 5.7 74 6.6 8.4 79
North Rapid Creek 6130 5.9 6.7 88 7.8 9.0 87
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Basin Index (%) 74 80
CHEYENNE RIVER BASIN
Blind Park 6890 4.4 7.2 61 8.2 11.0 75
North Rapid Creek 6130 5.9 6.7 88 7.8 9.0 87
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Basin Index (%) 74 80
UPPER N. PLATTE
Arapaho Ridge 10960 20.4 19.3 106 20.2 20.8 97
Blackhall Mtn 9820 27.8 -M * 27.1 -M *
Cinnabar Park 9574 18.8 19.6 96 20.8 22.7 92
Columbine 9160 22.3 22.3 100 19.7 24.0 82
Divide Peak 8880 16.4 19.1 86 17.5 20.1 87
Joe Wright 10120 19.5 19.9 98 22.3 24.2 92
Laprele Creek 8375 11.1 9.4 118 12.4 11.5 108
Med Bow 10500 38.7 -M * 31.4 -M *
Never Summer 10280 17.3 19.1 91 12.9 -M *
North French Creek 10130 28.1 27.3 103 27.5 25.2 109
Old Battle 10000 28.3 28.6 99 29.5 32.9 90
Rawah 9020 11.6 10.1 115 13.4 13.1 102
Sage Creek Basin 7850 17.5 12.5 140 10.1 13.6 74
Sand Lake 10050 29.0 26.7 109 26.3 23.1 114
South Brush Creek 8440 10.0 12.1 83 10.2 14.2 72
Tower 10500 34.6 42.7 81 30.0 37.5 80
Webber Springs 9250 19.6 22.6 87 21.2 25.1 84
Whiskey Park 8950 28.4 25.0 114 25.9 26.4 98
Willow Creek Pass 9540 11.4 11.6 98 10.1 12.5 81
Zirkel 9340 22.6 26.2 86 25.3 26.8 94
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Basin Index (%) 98 92
SWEETWATER
Deer Park 9700 12.4 14.3 87 15.0 18.3 82
Larsen Creek 9000 7.2 11.9 61 8.9 -M *
South Pass 9040 12.0 14.6 82 13.0 16.3 80
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Basin Index (%) 77 81
LOWER N. PLATTE
Casper Mtn. 7900 13.4 12.9 104 11.1 13.7 81
Laprele Creek 8375 11.1 9.4 118 12.4 11.5 108
Reno Hill 8400 15.1 12.8 118 15.8 14.1 112
Windy Peak 7900 12.1 7.7 157 13.0 9.7 134
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Basin Index (%) 121 107
LARAMIE RIVER
Brooklyn Lake 10240 24.4 19.1 128 25.6 19.6 131
Cinnabar Park 9574 18.8 19.6 96 20.8 22.7 92
Crow Creek 8330 5.6 6.8 82 10.0 9.9 101
Deadman Hill 10220 18.9 15.1 125 17.3 16.0 108
Rawah 9020 11.6 10.1 115 13.4 13.1 102
Roach 9700 16.0 15.0 107 17.1 17.9 96
Windy Peak 7900 12.1 7.7 157 13.0 9.7 134
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Basin Index (%) 115 108
S. PLATTE
Crow Creek 8330 5.6 6.8 82 10.0 9.9 101
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Basin Index (%) 82 101
LITTLE SNAKE RIVER
Battle Mountain 7440 8.1 10.9 74 12.5 14.2 88
Divide Peak 8880 16.4 19.1 86 17.5 20.1 87
Elk River 8700 16.6 18.0 92 12.7 18.9 67
Elkhead Divide 8780 16.0 -M * 16.7 -M *
Little Snake River 8915 23.0 22.3 103 28.6 27.8 103
Old Battle 10000 28.3 28.6 99 29.5 32.9 90
Sage Creek Basin 7850 17.5 12.5 140 10.1 13.6 74
Sandstone RS 8150 12.7 13.1 97 13.8 17.4 79
Whiskey Park 8950 28.4 25.0 114 25.9 26.4 98
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Basin Index (%) 101 88
UPPER GREEN RIVER
Big Sandy Opening 9080 9.5 12.2 78 8.6 12.5 69
Blind Bull Sum 8650 19.7 21.8 90 13.0 18.5 70
East Rim Divide 7930 8.5 9.8 87 8.2 11.2 73
Elkhart Park G.S. 9400 9.4 11.7 80 8.1 12.5 65
Gros Ventre Summit 8750 9.6 12.6 76 9.9 12.2 81
Gunsight Pass 9820 11.2 13.1 85 10.6 12.9 82
Indian Creek 9425 19.1 23.2 82 16.9 21.3 79
Kendall R.S. 7740 11.0 11.3 97 12.3 13.6 90
Larsen Creek 9000 7.2 11.9 61 8.9 -M *
Loomis Park 8240 11.6 14.4 81 13.1 16.4 80
New Fork Lake 8340 8.8 10.2 86 9.6 10.2 94
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 10.8 11.8 92 12.7 13.4 95
Spring Creek Divide 9000 21.3 22.4 95 21.4 22.6 95
Triple Peak 8500 20.9 21.1 99 21.8 24.0 91
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Basin Index (%) 86 83
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.8 -M * 10.0 -M *
Buck Pasture 9632 12.9 -M * 13.8 -M *
EF Blacks Fork GS 9360 12.6 -M * 11.0 -M *
Hams Fork 7840 10.4 10.6 98 9.8 10.8 91
Henrys Fork 10182 -M -M * 11.8 -M *
Hewinta 9500 11.9 10.4 114 13.0 13.1 99
Hickerson Park 9122 9.8 7.2 136 10.7 9.4 114
Hole-in-Rock 9168 8.6 7.0 123 11.0 8.9 124
Indian Creek 9425 19.1 23.2 82 16.9 21.3 79
Kelley R.S. 8180 12.1 14.7 82 13.7 17.2 80
Spirit Lk 10235 13.4 -M * 14.3 -M *
Steel Creek Park 10158 15.0 14.6 103 16.1 15.3 105
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Basin Index (%) 99 95
UPPER BEAR RIVER
Bear River RS 8777 8.5 -M * 10.6 -M *
Bug Lake 7987 14.8 17.9 83 13.7 18.3 75
Burts Miller Ranch 8000 6.4 -M * 7.5 -M *
Chalk Creek #1 9171 16.1 22.7 71 16.8 23.6 71
Dry Bread Pond 8302 14.3 17.6 81 14.3 18.4 78
Giveout 6930 7.8 8.5 92 9.7 11.8 82
Hayden Fork 9130 12.8 14.8 86 17.4 19.7 88
Kelley R.S. 8180 12.1 14.7 82 13.7 17.2 80
Lily Lake 9133 10.8 11.9 91 11.6 16.0 72
Monte Cristo 8932 18.8 25.6 73 18.2 24.5 74
Salt River Summit 7640 11.5 12.7 91 12.4 15.8 78
Spring Creek Divide 9000 21.3 22.4 95 21.4 22.6 95
Trial Lake 9992 17.4 21.2 82 16.2 22.6 72
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Basin Index (%) 83 79
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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.
