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: DECEMBER 26 , 2021
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
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WYOMING
SNAKE RIVER
Base Camp 7060 5.7 6.4 89 8.3 9.2 90
Blind Bull Sum 8650 7.8 8.7 90 7.3 8.0 91
Cottonwood Creek 7670 6.8 7.8 87 12.6 9.8 129
East Rim Divide 7930 2.9 4.0 72 5.0 5.0 100
Grand Targhee 9260 16.5 18.4 90 15.1 15.4 98
Granite Creek 6770 4.1 5.9 69 7.6 8.5 89
Grassy Lake 7265 9.5 11.0 86 16.0 14.4 111
Gros Ventre Summit 8750 5.2 5.4 96 5.5 5.8 95
Gunsight Pass 9820 5.9 5.2 113 6.9 6.6 105
Lewis Lake Divide 7850 11.6 11.2 104 17.9 14.6 123
Loomis Park 8240 4.1 5.8 71 6.9 7.3 95
Phillips Bench 8200 7.0 9.4 74 10.6 11.0 96
Salt River Summit 7640 3.8 4.4 86 8.3 6.2 134
Snake River Station 6920 5.0 6.0 83 10.0 9.6 104
Somsen Ranch 6800 3.9 4.2 93 9.6 7.2 133
Spring Creek Divide 9000 8.8 8.8 100 11.2 9.6 117
Thumb Divide 7980 6.6 5.9 112 9.9 7.8 127
Togwotee Pass 9580 9.1 10.0 91 10.3 10.4 99
Triple Peak 8500 8.4 8.4 100 12.2 10.0 122
Two Ocean Plateau 9240 13.3 12.4 107 11.8 11.1 106
Willow Creek 8080 9.1 9.9 92 15.2 14.2 107
Younts Peak 8350 4.3 6.0 72 3.6 6.4 56
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Basin Index (%) 91 107
MADISON HEADWATERS IN WYOMING
Black Bear 8170 16.0 15.1 106 12.2 16.2 75
Canyon 7870 3.5 -M * 6.0 -M *
Madison Plateau 7750 8.9 8.8 101 11.8 10.5 112
West Yellowstone 6700 4.1 4.2 98 7.4 6.4 116
Whiskey Creek 6800 5.5 5.4 102 10.0 8.6 116
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Basin Index (%) 103 99
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 6.8 9.0 76 6.5 8.5 76
Canyon 7870 3.5 -M * 6.0 -M *
Evening Star 9200 10.8 10.8 100 10.7 13.4 80
Fisher Creek 9100 13.1 13.9 94 14.8 13.4 110
Monument Peak 8850 7.6 8.8 86 10.2 10.0 102
Northeast Entrance 7350 1.8 3.4 53 5.6 6.2 90
Parker Peak 9400 8.3 9.2 90 8.4 9.2 91
Sylvan Lake 8420 6.3 8.0 79 10.6 10.6 100
Thumb Divide 7980 6.6 5.9 112 9.9 7.8 127
Two Ocean Plateau 9240 13.3 12.4 107 11.8 11.1 106
White Mill 8700 8.7 9.8 89 9.2 9.8 94
Wolverine 7650 3.5 4.6 76 5.2 5.8 90
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Basin Index (%) 91 97
WIND RIVER
Burroughs Creek 8750 3.5 -M * 5.9 -M *
Castle Creek 8400 1.1 3.1 35 2.5 4.4 57
Cold Springs 9630 5.0 3.4 147 6.8 4.6 148
Deer Park 9700 4.9 5.9 83 7.7 7.5 103
Hobbs Park 10100 6.7 5.8 116 8.4 5.8 145
Kirwin 9550 5.3 5.2 102 6.0 5.6 107
Little Warm 9370 5.4 4.0 135 7.4 5.8 128
South Pass 9040 4.4 5.8 76 6.5 6.7 97
St. Lawrence Alt 8620 .9 -M * 5.1 -M *
Togwotee Pass 9580 9.1 10.0 91 10.3 10.4 99
Townsend Creek 8700 3.4 3.8 89 6.2 5.4 115
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Basin Index (%) 96 110
BIGHORN BASIN
Bald Mtn. 9380 7.1 7.9 90 7.2 7.2 100
Bear Trap Meadow 8200 2.5 2.6 96 4.7 4.2 112
Bone Springs Div 9350 6.5 6.9 94 6.2 6.6 94
Grave Springs 8550 2.0 3.0 67 4.8 4.0 120
Kirwin 9550 5.3 5.2 102 6.0 5.6 107
Marquette 8760 1.0 3.4 29 3.7 4.4 84
Middle Powder 7760 2.8 4.0 70 5.2 4.8 108
Owl Creek 8975 3.0 2.5 120 3.7 3.0 123
Powder River Pass 9480 4.1 4.5 91 3.8 6.0 63
Shell Creek 9580 6.0 6.9 87 6.5 6.2 105
Timber Creek 7950 .8 2.0 40 2.9 4.0 72
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Basin Index (%) 84 98
SHOSHONE RIVER
Blackwater 9780 9.5 10.4 91 10.2 9.9 103
Evening Star 9200 10.8 10.8 100 10.7 13.4 80
Marquette 8760 1.0 3.4 29 3.7 4.4 84
Sylvan Lake 8420 6.3 8.0 79 10.6 10.6 100
Sylvan Road 7120 2.8 5.1 55 8.0 8.2 98
Younts Peak 8350 4.3 6.0 72 3.6 6.4 56
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Basin Index (%) 79 88
POWDER RIVER
Bear Trap Meadow 8200 2.5 2.6 96 4.7 4.2 112
Cloud Peak Reservoir 9860 6.0 5.8 103 7.5 6.2 121
Grave Springs 8550 2.0 3.0 67 4.8 4.0 120
Hansen Sawmill 8360 3.1 2.7 115 5.3 3.8 139
Middle Powder 7760 2.8 4.0 70 5.2 4.8 108
Powder River Pass 9480 4.1 4.5 91 3.8 6.0 63
Soldier Park 8720 .1 2.0 5 5.1 4.2 121
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Basin Index (%) 84 110
TONGUE RIVER
Big Goose 7990 2.4 3.2 75 6.4 4.7 136
Bone Springs Div 9350 6.5 6.9 94 6.2 6.6 94
Burgess Junction 7880 3.6 4.2 86 5.9 5.4 109
Dome Lake 8880 3.7 4.4 84 6.5 5.5 118
Little Goose 8870 3.2 4.0 80 7.0 5.4 130
Sucker Creek 8880 4.8 4.9 98 6.9 6.1 113
Tie Creek 6870 .9 1.9 47 5.8 4.9 118
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Basin Index (%) 85 116
BELLE FOURCHE
Blind Park 6890 1.7 2.6 65 4.1 4.6 89
Cole Canyon 5910 .7 1.8 39 4.9 4.0 122
North Rapid Creek 6130 1.7 2.8 61 3.4 3.4 100
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Basin Index (%) 57 103
CHEYENNE RIVER BASIN
Blind Park 6890 1.7 2.6 65 4.1 4.6 89
North Rapid Creek 6130 1.7 2.8 61 3.4 3.4 100
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Basin Index (%) 63 94
UPPER N. PLATTE
Arapaho Ridge 10960 8.1 9.0 90 8.2 9.7 85
Blackhall Mtn 9820 11.3 11.7 97 13.4 13.3 101
Cinnabar Park 9574 7.5 8.4 89 10.0 10.2 98
Columbine 9160 6.8 8.0 85 10.8 10.0 108
Divide Peak 8880 6.4 7.0 91 11.0 9.2 120
Joe Wright 10120 7.9 7.8 101 13.7 10.8 127
Laprele Creek 8375 1.2 3.5 34 4.4 5.0 88
Med Bow 10500 14.7 -M * 15.0 -M *
Never Summer 10280 8.8 8.2 107 7.2 8.0 90
North French Creek 10130 11.9 10.6 112 13.3 11.2 119
Old Battle 10000 13.1 11.7 112 15.4 14.0 110
Rawah 9020 3.3 4.7 70 6.3 7.4 85
Sage Creek Basin 7850 3.0 4.7 64 5.4 6.1 89
Sand Lake 10050 11.7 10.7 109 12.6 10.2 124
South Brush Creek 8440 3.4 4.1 83 6.4 5.8 110
Tower 10500 16.1 15.8 102 19.5 16.4 119
Webber Springs 9250 8.7 8.6 101 11.9 10.9 109
Whiskey Park 8950 11.4 9.0 127 14.4 11.6 124
Willow Creek Pass 9540 5.6 5.3 106 6.3 6.1 103
Zirkel 9340 8.4 10.0 84 14.4 13.0 111
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Basin Index (%) 97 108
SWEETWATER
Deer Park 9700 4.9 5.9 83 7.7 7.5 103
Larsen Creek 9000 -M 2.9 * 6.2 5.7 109
South Pass 9040 4.4 5.8 76 6.5 6.7 97
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Basin Index (%) 79 103
LOWER N. PLATTE
Casper Mtn. 7900 2.5 4.9 51 7.6 6.3 121
Laprele Creek 8375 1.2 3.5 34 4.4 5.0 88
Reno Hill 8400 3.8 5.6 68 7.5 6.5 115
Windy Peak 7900 1.5 3.0 50 4.8 4.6 104
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Basin Index (%) 53 108
LARAMIE RIVER
Brooklyn Lake 10240 8.1 7.6 107 10.7 8.3 129
Cinnabar Park 9574 7.5 8.4 89 10.0 10.2 98
Crow Creek 8330 .7 3.5 20 3.9 4.7 83
Deadman Hill 10220 7.8 7.4 105 7.3 7.6 96
Rawah 9020 3.3 4.7 70 6.3 7.4 85
Roach 9700 6.0 6.4 94 8.4 8.1 104
Windy Peak 7900 1.5 3.0 50 4.8 4.6 104
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Basin Index (%) 85 101
S. PLATTE
Crow Creek 8330 .7 3.5 20 3.9 4.7 83
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Basin Index (%) 20 83
LITTLE SNAKE RIVER
Battle Mountain 7440 3.4 4.0 85 8.3 6.3 132
Divide Peak 8880 6.4 7.0 91 11.0 9.2 120
Elk River 8700 6.4 5.9 108 11.1 8.1 137
Elkhead Divide 8780 6.4 -M * 10.7 -M *
Little Snake River 8915 8.7 9.4 93 16.1 14.6 110
Old Battle 10000 13.1 11.7 112 15.4 14.0 110
Sage Creek Basin 7850 3.0 4.7 64 5.4 6.1 89
Sandstone RS 8150 4.6 4.4 105 8.6 7.5 115
Whiskey Park 8950 11.4 9.0 127 14.4 11.6 124
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Basin Index (%) 102 117
UPPER GREEN RIVER
Big Sandy Opening 9080 4.0 5.4 74 6.2 5.4 115
Blind Bull Sum 8650 7.8 8.7 90 7.3 8.0 91
East Rim Divide 7930 2.9 4.0 72 5.0 5.0 100
Elkhart Park G.S. 9400 3.1 5.2 60 4.5 6.0 75
Gros Ventre Summit 8750 5.2 5.4 96 5.5 5.8 95
Gunsight Pass 9820 5.9 5.2 113 6.9 6.6 105
Indian Creek 9425 8.9 8.8 101 9.9 8.6 115
Kendall R.S. 7740 3.2 4.5 71 6.6 6.2 106
Larsen Creek 9000 -M 2.9 * 6.2 5.7 109
Loomis Park 8240 4.1 5.8 71 6.9 7.3 95
New Fork Lake 8340 3.0 4.2 71 5.2 4.6 113
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.1 4.7 66 8.0 6.0 133
Spring Creek Divide 9000 8.8 8.8 100 11.2 9.6 117
Triple Peak 8500 8.4 8.4 100 12.2 10.0 122
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Basin Index (%) 86 107
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.3 3.3 100 5.7 5.6 102
Buck Pasture 9632 5.2 -M * 8.5 -M *
EF Blacks Fork GS 9360 3.2 3.8 84 6.5 5.1 127
Hams Fork 7840 2.6 4.3 60 6.4 4.9 131
Henrys Fork 10182 -M -M * 6.5 -M *
Hewinta 9500 2.9 3.3 88 7.5 6.2 121
Hickerson Park 9122 2.6 2.8 93 4.9 4.7 104
Hole-in-Rock 9168 2.4 2.9 83 5.4 4.6 117
Indian Creek 9425 8.9 8.8 101 9.9 8.6 115
Kelley R.S. 8180 3.7 5.7 65 9.2 7.3 126
Spirit Lk 10235 6.2 5.1 122 9.0 7.7 117
Steel Creek Park 10158 6.5 5.6 116 8.8 7.0 126
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Basin Index (%) 93 119
UPPER BEAR RIVER
Bear River RS 8777 3.0 3.6 83 6.8 5.2 131
Bug Lake 7987 5.3 6.0 88 10.0 7.8 128
Burts Miller Ranch 8000 3.0 2.5 120 3.9 3.5 111
Chalk Creek #1 9171 7.7 8.6 90 11.0 9.7 113
Giveout 6930 2.5 2.8 89 6.7 5.4 124
Hayden Fork 9130 5.4 5.0 108 10.4 8.6 121
Kelley R.S. 8180 3.7 5.7 65 9.2 7.3 126
Lily Lake 9133 3.0 4.7 64 8.2 7.0 117
Monte Cristo 8932 8.3 9.2 90 12.3 10.3 119
Salt River Summit 7640 3.8 4.4 86 8.3 6.2 134
Spring Creek Divide 9000 8.8 8.8 100 11.2 9.6 117
Trial Lake 9992 8.2 8.4 98 11.4 9.4 121
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Basin Index (%) 90 122
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Median (or Average) 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 (or Average) represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median (or Average) value for those sites on this day.
The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Median (or Average) value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1991-2020.
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 or average for the day is less than 10% of the maximum
median or average value for the year.
* Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians or averages 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.
