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: DECEMBER 13 , 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 2.7 4.8 56 5.5 8.0 69
Blind Bull Sum 8650 4.1 7.0 59 4.7 6.6 71
Cottonwood Creek 7670 4.1 6.2 66 9.7 8.2 118
East Rim Divide 7930 .8 2.9 28 3.0 4.0 75
Grand Targhee 9260 11.6 15.2 76 12.2 12.8 95
Granite Creek 6770 .9 4.1 22 4.0 6.6 61
Grassy Lake 7265 4.8 8.2 59 11.1 11.6 96
Gros Ventre Summit 8750 2.2 4.4 50 3.1 5.0 62
Gunsight Pass 9820 3.0 4.0 75 4.5 5.4 83
Lewis Lake Divide 7850 5.6 8.7 64 11.9 11.7 102
Loomis Park 8240 1.3 4.4 30 4.1 5.9 69
Phillips Bench 8200 3.2 7.4 43 6.9 9.0 77
Salt River Summit 7640 1.3 3.2 41 5.8 5.3 109
Snake River Station 6920 2.1 4.6 46 7.0 8.1 86
Somsen Ranch 6800 1.2 3.0 40 7.0 6.0 117
Spring Creek Divide 9000 5.0 6.8 74 7.7 7.7 100
Thumb Divide 7980 2.9 4.2 69 6.6 6.6 100
Togwotee Pass 9580 5.7 8.4 68 7.0 8.8 80
Triple Peak 8500 4.4 6.4 69 8.1 8.2 99
Two Ocean Plateau 9240 8.4 10.6 79 7.6 9.8 78
Willow Creek 8080 4.3 7.7 56 10.7 11.2 96
Younts Peak 8350 2.1 -M * 2.2 -M *
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Basin Index (%) 60 89
MADISON HEADWATERS IN WYOMING
Black Bear 8170 9.3 11.4 82 11.4 13.3 86
Canyon 7870 1.4 -M * 4.3 -M *
Madison Plateau 7750 4.3 7.0 61 7.6 9.0 84
West Yellowstone 6700 1.6 3.0 53 5.0 5.2 96
Whiskey Creek 6800 2.1 4.0 52 6.9 6.9 100
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Basin Index (%) 68 90
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 3.8 7.6 50 3.7 7.0 53
Canyon 7870 1.4 -M * 4.3 -M *
Evening Star 9200 6.6 8.8 75 7.2 11.0 65
Fisher Creek 9100 8.0 10.6 75 9.9 11.7 85
Monument Peak 8850 5.3 6.6 80 7.7 8.4 92
Northeast Entrance 7350 .7 2.4 29 4.3 5.0 86
Parker Peak 9400 5.7 7.6 75 5.7 7.8 73
Sylvan Lake 8420 3.8 6.3 60 7.8 9.0 87
Thumb Divide 7980 2.9 4.2 69 6.6 6.6 100
Two Ocean Plateau 9240 8.4 10.6 79 7.6 9.8 78
White Mill 8700 5.8 7.6 76 6.5 8.4 77
Wolverine 7650 .8 3.6 22 3.7 4.6 80
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Basin Index (%) 68 79
WIND RIVER
Burroughs Creek 8750 1.7 -M * 3.8 -M *
Castle Creek 8400 .0 2.4 0 1.8 3.6 50
Cold Springs 9630 3.5 2.7 130 5.4 4.0 135
Deer Park 9700 3.4 4.8 71 6.0 6.2 97
Hobbs Park 10100 4.2 5.0 84 6.2 4.9 127
Kirwin 9550 2.6 4.0 65 3.5 5.0 70
Little Warm 9370 3.0 3.4 88 4.7 4.8 98
South Pass 9040 2.9 4.8 60 5.2 5.6 93
St. Lawrence Alt 8620 .3 -M * 4.1 -M *
Togwotee Pass 9580 5.7 8.4 68 7.0 8.8 80
Townsend Creek 8700 2.4 3.0 80 5.3 4.7 113
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Basin Index (%) 72 95
BIGHORN BASIN
Bald Mtn. 9380 5.9 -M * 6.2 -M *
Bear Trap Meadow 8200 2.2 2.1 105 4.4 3.6 122
Bone Springs Div 9350 5.3 -M * 5.3 -M *
Grave Springs 8550 1.6 2.3 70 3.9 3.7 105
Kirwin 9550 2.6 4.0 65 3.5 5.0 70
Marquette 8760 .5 -M * 2.9 -M *
Middle Powder 7760 2.1 3.0 70 4.6 4.2 110
Owl Creek 8975 2.4 -M * 3.2 -M *
Powder River Pass 9480 3.5 3.9 90 3.2 5.1 63
Shell Creek 9580 5.2 -M * 5.8 -M *
Timber Creek 7950 .4 -M * 2.6 -M *
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Basin Index (%) 78 91
SHOSHONE RIVER
Blackwater 9780 6.2 9.0 69 6.8 8.3 82
Evening Star 9200 6.6 8.8 75 7.2 11.0 65
Marquette 8760 .5 -M * 2.9 -M *
Sylvan Lake 8420 3.8 6.3 60 7.8 9.0 87
Sylvan Road 7120 1.2 3.9 31 6.4 7.0 91
Younts Peak 8350 2.1 -M * 2.2 -M *
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Basin Index (%) 64 80
POWDER RIVER
Bear Trap Meadow 8200 2.2 2.1 105 4.4 3.6 122
Cloud Peak Reservoir 9860 4.8 -M * 6.5 -M *
Grave Springs 8550 1.6 2.3 70 3.9 3.7 105
Hansen Sawmill 8360 2.6 -M * 5.1 -M *
Middle Powder 7760 2.1 3.0 70 4.6 4.2 110
Powder River Pass 9480 3.5 3.9 90 3.2 5.1 63
Soldier Park 8720 .2 -M * 4.8 -M *
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Basin Index (%) 83 97
TONGUE RIVER
Big Goose 7990 1.9 -M * 5.7 -M *
Bone Springs Div 9350 5.3 -M * 5.3 -M *
Burgess Junction 7880 2.3 -M * 4.9 -M *
Dome Lake 8880 3.0 -M * 5.7 -M *
Little Goose 8870 2.6 -M * 6.3 -M *
Sucker Creek 8880 3.8 -M * 6.0 -M *
Tie Creek 6870 .5 -M * 5.2 -M *
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Basin Index (%) * *
BELLE FOURCHE
Blind Park 6890 1.6 2.0 80 4.1 4.0 102
Cole Canyon 5910 .5 1.4 36 4.7 3.4 138
North Rapid Creek 6130 1.5 2.2 68 3.2 3.2 100
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Basin Index (%) 64 113
CHEYENNE RIVER BASIN
Blind Park 6890 1.6 2.0 80 4.1 4.0 102
North Rapid Creek 6130 1.5 2.2 68 3.2 3.2 100
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Basin Index (%) 74 101
UPPER N. PLATTE
Arapaho Ridge 10960 5.1 7.0 73 5.5 8.0 69
Blackhall Mtn 9820 7.4 8.9 83 9.5 10.5 90
Cinnabar Park 9574 5.1 6.7 76 7.3 8.0 91
Columbine 9160 3.6 5.8 62 7.7 8.1 95
Divide Peak 8880 3.4 5.6 61 7.8 7.6 103
Joe Wright 10120 5.2 6.6 79 10.3 9.3 111
Laprele Creek 8375 .9 2.4 38 4.1 4.4 93
Med Bow 10500 9.6 -M * 10.5 -M *
Never Summer 10280 6.0 6.1 98 5.3 6.4 83
North French Creek 10130 8.6 8.4 102 10.3 9.0 114
Old Battle 10000 8.7 9.2 95 11.3 11.5 98
Rawah 9020 1.8 3.5 51 4.8 6.1 79
Sage Creek Basin 7850 1.3 3.9 33 3.8 5.0 76
Sand Lake 10050 8.2 8.6 95 9.3 8.2 113
South Brush Creek 8440 2.0 3.4 59 5.2 5.1 102
Tower 10500 13.5 13.0 104 15.2 13.4 113
Webber Springs 9250 4.9 6.7 73 8.1 9.2 88
Whiskey Park 8950 7.8 7.2 108 10.9 9.6 114
Willow Creek Pass 9540 3.2 4.6 70 4.2 5.2 81
Zirkel 9340 4.8 6.8 71 10.6 10.2 104
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Basin Index (%) 82 98
SWEETWATER
Deer Park 9700 3.4 4.8 71 6.0 6.2 97
Larsen Creek 9000 -M 2.2 * 5.3 4.5 118
South Pass 9040 2.9 4.8 60 5.2 5.6 93
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Basin Index (%) 66 101
LOWER N. PLATTE
Casper Mtn. 7900 2.2 4.0 55 7.1 5.4 131
Laprele Creek 8375 .9 2.4 38 4.1 4.4 93
Reno Hill 8400 3.3 4.4 75 6.9 5.2 133
Windy Peak 7900 1.2 2.1 57 4.3 3.9 110
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Basin Index (%) 59 119
LARAMIE RIVER
Brooklyn Lake 10240 4.5 5.9 76 7.2 6.8 106
Cinnabar Park 9574 5.1 6.7 76 7.3 8.0 91
Crow Creek 8330 .2 3.0 7 3.1 4.2 74
Deadman Hill 10220 5.2 5.8 90 5.1 6.0 85
Rawah 9020 1.8 3.5 51 4.8 6.1 79
Roach 9700 3.8 5.0 76 5.7 6.8 84
Windy Peak 7900 1.2 2.1 57 4.3 3.9 110
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Basin Index (%) 68 90
S. PLATTE
Crow Creek 8330 .2 3.0 7 3.1 4.2 74
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Basin Index (%) 7 74
LITTLE SNAKE RIVER
Battle Mountain 7440 1.4 2.6 54 6.1 5.3 115
Divide Peak 8880 3.4 5.6 61 7.8 7.6 103
Elk River 8700 3.8 4.5 84 8.6 6.2 139
Elkhead Divide 8780 3.5 -M * -M -M *
Little Snake River 8915 4.6 6.3 73 11.5 11.0 105
Old Battle 10000 8.7 9.2 95 11.3 11.5 98
Sage Creek Basin 7850 1.3 3.9 33 3.8 5.0 76
Sandstone RS 8150 1.9 3.2 59 6.3 6.2 102
Whiskey Park 8950 7.8 7.2 108 10.9 9.6 114
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Basin Index (%) 77 106
UPPER GREEN RIVER
Big Sandy Opening 9080 2.7 4.2 64 5.1 4.3 119
Blind Bull Sum 8650 4.1 7.0 59 4.7 6.6 71
East Rim Divide 7930 .8 2.9 28 3.0 4.0 75
Elkhart Park G.S. 9400 1.9 3.8 50 3.3 5.0 66
Gros Ventre Summit 8750 2.2 4.4 50 3.1 5.0 62
Gunsight Pass 9820 3.0 4.0 75 4.5 5.4 83
Indian Creek 9425 5.3 6.6 80 7.1 6.6 108
Kendall R.S. 7740 .8 3.5 23 4.1 5.0 82
Larsen Creek 9000 -M 2.2 * 5.3 4.5 118
Loomis Park 8240 1.3 4.4 30 4.1 5.9 69
New Fork Lake 8340 1.3 3.4 38 3.6 4.0 90
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 -M 3.4 * 5.2 4.8 108
Spring Creek Divide 9000 5.0 6.8 74 7.7 7.7 100
Triple Peak 8500 4.4 6.4 69 8.1 8.2 99
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Basin Index (%) 57 89
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.5 2.3 65 3.8 4.5 84
Buck Pasture 9632 2.8 -M * 6.2 -M *
EF Blacks Fork GS 9360 1.2 2.6 46 5.5 4.5 122
Hams Fork 7840 -M 3.0 * 4.9 4.0 122
Henrys Fork 10182 -M -M * 4.5 -M *
Hewinta 9500 1.1 2.5 44 5.4 5.4 100
Hickerson Park 9122 1.4 2.0 70 3.7 4.2 88
Hole-in-Rock 9168 1.3 2.0 65 4.1 4.0 102
Indian Creek 9425 5.3 6.6 80 7.1 6.6 108
Kelley R.S. 8180 1.4 4.0 35 6.7 5.6 120
Spirit Lk 10235 3.3 3.8 87 6.1 6.3 97
Steel Creek Park 10158 4.4 4.6 96 6.7 6.2 108
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Basin Index (%) 69 105
UPPER BEAR RIVER
Bear River RS 8777 1.1 2.4 46 4.9 4.6 107
Bug Lake 7987 1.5 4.3 35 6.5 6.0 108
Burts Miller Ranch 8000 1.9 1.7 112 3.0 3.1 97
Chalk Creek #1 9171 4.3 6.4 67 8.0 8.0 100
Giveout 6930 .4 2.0 20 4.9 4.4 111
Hayden Fork 9130 2.9 3.6 81 7.6 7.2 106
Kelley R.S. 8180 1.4 4.0 35 6.7 5.6 120
Lily Lake 9133 1.4 3.6 39 6.0 5.8 103
Monte Cristo 8932 4.4 6.3 70 8.7 8.0 109
Salt River Summit 7640 1.3 3.2 41 5.8 5.3 109
Spring Creek Divide 9000 5.0 6.8 74 7.7 7.7 100
Trial Lake 9992 3.6 5.6 64 7.2 7.0 103
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Basin Index (%) 59 106
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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.
