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 TUESDAY: DECEMBER 21 , 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 4.0 5.9 68 6.7 8.8 76
Blind Bull Sum 8650 5.3 8.0 66 5.6 7.5 75
Cottonwood Creek 7670 5.3 7.4 72 11.0 9.1 121
East Rim Divide 7930 1.9 3.6 53 4.0 4.4 91
Grand Targhee 9260 14.2 17.0 84 13.8 13.8 100
Granite Creek 6770 2.3 4.8 48 -M 7.6 *
Grassy Lake 7265 7.2 10.0 72 13.9 12.9 108
Gros Ventre Summit 8750 3.3 4.8 69 4.3 5.5 78
Gunsight Pass 9820 4.3 4.8 90 5.7 5.9 97
Lewis Lake Divide 7850 8.3 10.2 81 14.6 12.9 113
Loomis Park 8240 2.6 5.2 50 5.4 6.4 84
Phillips Bench 8200 4.9 8.3 59 8.7 9.6 91
Salt River Summit 7640 2.3 3.8 61 6.6 5.8 114
Snake River Station 6920 3.5 5.4 65 8.4 9.2 91
Somsen Ranch 6800 2.3 3.5 66 8.1 6.6 123
Spring Creek Divide 9000 6.5 7.8 83 9.2 8.7 106
Thumb Divide 7980 4.5 5.2 87 8.1 7.3 111
Togwotee Pass 9580 7.3 9.6 76 8.6 9.8 88
Triple Peak 8500 5.9 7.6 78 9.8 9.2 107
Two Ocean Plateau 9240 10.1 11.2 90 9.0 10.8 83
Willow Creek 8080 6.2 9.3 67 12.5 12.8 98
Younts Peak 8350 2.8 -M * 3.2 -M *
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Basin Index (%) 73 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 12.6 13.6 93 12.1 14.8 82
Canyon 7870 2.7 -M * 5.6 -M *
Madison Plateau 7750 6.5 7.6 86 10.0 10.2 98
West Yellowstone 6700 3.0 3.6 83 6.3 5.8 109
Whiskey Creek 6800 3.9 4.8 81 8.6 7.8 110
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Basin Index (%) 88 96
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 5.4 8.7 62 5.2 8.2 63
Canyon 7870 2.7 -M * 5.6 -M *
Evening Star 9200 8.5 10.4 82 9.0 12.3 73
Fisher Creek 9100 10.2 13.0 78 12.2 12.6 97
Monument Peak 8850 6.5 7.8 83 9.1 9.2 99
Northeast Entrance 7350 1.4 2.9 48 5.1 5.8 88
Parker Peak 9400 6.8 8.6 79 6.8 8.8 77
Sylvan Lake 8420 4.8 7.5 64 8.9 10.2 87
Thumb Divide 7980 4.5 5.2 87 8.1 7.3 111
Two Ocean Plateau 9240 10.1 11.2 90 9.0 10.8 83
White Mill 8700 7.6 9.2 83 8.2 9.2 89
Wolverine 7650 1.8 4.2 43 4.5 5.4 83
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Basin Index (%) 76 86
WIND RIVER
Burroughs Creek 8750 2.6 -M * 4.7 -M *
Castle Creek 8400 .8 3.0 27 2.2 4.1 54
Cold Springs 9630 4.4 3.1 142 6.1 4.2 145
Deer Park 9700 3.7 5.1 73 6.5 6.9 94
Hobbs Park 10100 5.3 5.6 95 7.2 5.2 138
Kirwin 9550 3.8 4.8 79 4.6 5.2 88
Little Warm 9370 4.0 3.8 105 5.8 5.4 107
South Pass 9040 3.4 5.3 64 5.7 6.4 89
St. Lawrence Alt 8620 .4 -M * 4.4 -M *
Togwotee Pass 9580 7.3 9.6 76 8.6 9.8 88
Townsend Creek 8700 2.8 3.2 88 5.7 5.0 114
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Basin Index (%) 82 100
BIGHORN BASIN
Bald Mtn. 9380 6.9 7.4 93 7.1 6.8 104
Bear Trap Meadow 8200 2.5 2.5 100 4.7 3.9 121
Bone Springs Div 9350 6.1 6.4 95 6.0 6.3 95
Grave Springs 8550 2.0 2.8 71 4.1 3.9 105
Kirwin 9550 3.8 4.8 79 4.6 5.2 88
Marquette 8760 1.1 3.2 34 3.7 4.3 86
Middle Powder 7760 2.8 3.5 80 5.2 4.6 113
Owl Creek 8975 2.8 2.2 127 3.6 2.9 124
Powder River Pass 9480 3.9 4.4 89 3.9 5.4 72
Shell Creek 9580 5.7 6.6 86 6.2 5.8 107
Timber Creek 7950 .7 1.9 37 3.0 3.8 79
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Basin Index (%) 84 98
SHOSHONE RIVER
Blackwater 9780 7.7 9.6 80 8.4 9.1 92
Evening Star 9200 8.5 10.4 82 9.0 12.3 73
Marquette 8760 1.1 3.2 34 3.7 4.3 86
Sylvan Lake 8420 4.8 7.5 64 8.9 10.2 87
Sylvan Road 7120 1.7 4.6 37 7.6 7.7 99
Younts Peak 8350 2.8 -M * 3.2 -M *
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Basin Index (%) 67 86
POWDER RIVER
Bear Trap Meadow 8200 2.5 2.5 100 4.7 3.9 121
Cloud Peak Reservoir 9860 5.4 5.5 98 7.0 5.8 121
Grave Springs 8550 2.0 2.8 71 4.1 3.9 105
Hansen Sawmill 8360 2.8 2.6 108 5.4 3.8 142
Middle Powder 7760 2.8 3.5 80 5.2 4.6 113
Powder River Pass 9480 3.9 4.4 89 3.9 5.4 72
Soldier Park 8720 .2 2.0 10 4.9 3.9 126
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Basin Index (%) 84 112
TONGUE RIVER
Big Goose 7990 2.4 2.9 83 6.0 4.4 136
Bone Springs Div 9350 6.1 6.4 95 6.0 6.3 95
Burgess Junction 7880 3.5 3.6 97 5.9 5.0 118
Dome Lake 8880 3.5 4.0 88 6.2 5.4 115
Little Goose 8870 3.0 3.4 88 6.8 5.2 131
Sucker Creek 8880 4.4 4.6 96 6.5 5.6 116
Tie Creek 6870 .9 1.4 64 5.7 4.6 124
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Basin Index (%) 90 118
BELLE FOURCHE
Blind Park 6890 1.6 2.4 67 4.2 4.5 93
Cole Canyon 5910 .6 1.6 38 4.8 3.5 137
North Rapid Creek 6130 1.6 2.6 62 3.3 3.4 97
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Basin Index (%) 58 108
CHEYENNE RIVER BASIN
Blind Park 6890 1.6 2.4 67 4.2 4.5 93
North Rapid Creek 6130 1.6 2.6 62 3.3 3.4 97
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Basin Index (%) 64 95
UPPER N. PLATTE
Arapaho Ridge 10960 6.1 8.7 70 6.3 9.0 70
Blackhall Mtn 9820 8.7 10.2 85 10.7 11.7 91
Cinnabar Park 9574 5.7 7.2 79 8.1 9.0 90
Columbine 9160 5.1 7.2 71 9.0 9.0 100
Divide Peak 8880 4.4 6.4 69 9.0 8.6 105
Joe Wright 10120 5.6 7.4 76 11.3 10.4 109
Laprele Creek 8375 1.0 3.0 33 4.2 4.7 89
Med Bow 10500 11.3 -M * 12.1 -M *
Never Summer 10280 6.7 7.4 91 5.8 7.2 81
North French Creek 10130 9.5 9.5 100 11.2 9.8 114
Old Battle 10000 10.2 10.5 97 12.7 12.9 98
Rawah 9020 2.1 4.1 51 5.1 7.0 73
Sage Creek Basin 7850 2.1 4.3 49 4.6 5.5 84
Sand Lake 10050 9.4 9.6 98 10.4 9.6 108
South Brush Creek 8440 2.2 4.0 55 5.4 5.4 100
Tower 10500 14.8 14.1 105 17.0 15.6 109
Webber Springs 9250 6.2 7.9 78 9.3 10.1 92
Whiskey Park 8950 9.1 8.2 111 12.3 10.6 116
Willow Creek Pass 9540 3.7 5.2 71 4.8 5.8 83
Zirkel 9340 5.9 8.0 74 11.9 11.4 104
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Basin Index (%) 83 98
SWEETWATER
Deer Park 9700 3.7 5.1 73 6.5 6.9 94
Larsen Creek 9000 -M 2.6 * 5.7 4.8 119
South Pass 9040 3.4 5.3 64 5.7 6.4 89
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Basin Index (%) 68 99
LOWER N. PLATTE
Casper Mtn. 7900 2.5 4.7 53 7.5 5.8 129
Laprele Creek 8375 1.0 3.0 33 4.2 4.7 89
Reno Hill 8400 3.8 5.0 76 7.4 5.7 130
Windy Peak 7900 1.3 2.6 50 4.4 4.2 105
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Basin Index (%) 56 115
LARAMIE RIVER
Brooklyn Lake 10240 5.7 7.0 81 8.4 7.4 114
Cinnabar Park 9574 5.7 7.2 79 8.1 9.0 90
Crow Creek 8330 .1 3.2 3 3.2 4.6 70
Deadman Hill 10220 5.9 6.9 86 5.8 7.0 83
Rawah 9020 2.1 4.1 51 5.1 7.0 73
Roach 9700 4.3 5.6 77 6.3 7.6 83
Windy Peak 7900 1.3 2.6 50 4.4 4.2 105
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Basin Index (%) 69 88
S. PLATTE
Crow Creek 8330 .1 3.2 3 3.2 4.6 70
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Basin Index (%) 3 70
LITTLE SNAKE RIVER
Battle Mountain 7440 2.1 3.5 60 7.1 6.0 118
Divide Peak 8880 4.4 6.4 69 9.0 8.6 105
Elk River 8700 4.4 5.4 81 9.3 7.0 133
Elkhead Divide 8780 4.4 -M * -M -M *
Little Snake River 8915 6.2 7.9 78 13.2 13.0 102
Old Battle 10000 10.2 10.5 97 12.7 12.9 98
Sage Creek Basin 7850 2.1 4.3 49 4.6 5.5 84
Sandstone RS 8150 3.0 4.0 75 7.2 7.1 101
Whiskey Park 8950 9.1 8.2 111 12.3 10.6 116
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Basin Index (%) 83 107
UPPER GREEN RIVER
Big Sandy Opening 9080 3.1 4.6 67 5.5 4.9 112
Blind Bull Sum 8650 5.3 8.0 66 5.6 7.5 75
East Rim Divide 7930 1.9 3.6 53 4.0 4.4 91
Elkhart Park G.S. 9400 2.8 4.4 64 4.3 5.5 78
Gros Ventre Summit 8750 3.3 4.8 69 4.3 5.5 78
Gunsight Pass 9820 4.3 4.8 90 5.7 5.9 97
Indian Creek 9425 6.6 7.6 87 8.2 7.6 108
Kendall R.S. 7740 1.7 4.2 40 5.1 5.5 93
Larsen Creek 9000 -M 2.6 * 5.7 4.8 119
Loomis Park 8240 2.6 5.2 50 5.4 6.4 84
New Fork Lake 8340 2.2 3.8 58 3.4 4.4 77
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 1.5 4.2 36 6.3 5.4 117
Spring Creek Divide 9000 6.5 7.8 83 9.2 8.7 106
Triple Peak 8500 5.9 7.6 78 9.8 9.2 107
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Basin Index (%) 68 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.0 2.8 71 4.5 5.1 88
Buck Pasture 9632 3.7 -M * 7.3 -M *
EF Blacks Fork GS 9360 1.6 3.4 47 6.2 4.8 129
Hams Fork 7840 1.4 3.6 39 5.7 4.6 124
Henrys Fork 10182 -M -M * 5.3 -M *
Hewinta 9500 1.7 2.9 59 6.3 5.8 109
Hickerson Park 9122 2.0 2.4 83 4.3 4.6 93
Hole-in-Rock 9168 1.8 2.4 75 4.8 4.4 109
Indian Creek 9425 6.6 7.6 87 8.2 7.6 108
Kelley R.S. 8180 2.1 4.9 43 7.5 6.2 121
Spirit Lk 10235 4.6 4.5 102 7.7 7.1 108
Steel Creek Park 10158 5.5 5.2 106 7.8 6.6 118
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Basin Index (%) 74 111
UPPER BEAR RIVER
Bear River RS 8777 1.8 2.8 64 5.6 5.0 112
Bug Lake 7987 2.9 5.2 56 7.9 6.8 116
Burts Miller Ranch 8000 2.5 2.1 119 3.4 3.4 100
Chalk Creek #1 9171 5.7 7.8 73 9.2 9.3 99
Giveout 6930 1.0 2.6 38 5.4 5.1 106
Hayden Fork 9130 4.0 4.4 91 9.0 7.8 115
Kelley R.S. 8180 2.1 4.9 43 7.5 6.2 121
Lily Lake 9133 1.6 4.4 36 6.9 6.6 105
Monte Cristo 8932 6.2 7.7 81 10.4 9.4 111
Salt River Summit 7640 2.3 3.8 61 6.6 5.8 114
Spring Creek Divide 9000 6.5 7.8 83 9.2 8.7 106
Trial Lake 9992 5.0 6.5 77 8.7 8.1 107
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Basin Index (%) 69 109
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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.
