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 27 , 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 5.9 6.7 88 8.5 9.2 92
Blind Bull Sum 8650 8.2 8.7 94 7.5 8.0 94
Cottonwood Creek 7670 7.3 8.0 91 13.1 9.9 132
East Rim Divide 7930 2.9 4.0 72 5.1 5.1 100
Grand Targhee 9260 16.6 18.6 89 14.9 15.6 96
Granite Creek 6770 4.5 5.9 76 7.1 8.8 81
Grassy Lake 7265 9.6 11.2 86 16.2 14.4 112
Gros Ventre Summit 8750 5.3 5.6 95 5.9 5.8 102
Gunsight Pass 9820 5.9 5.4 109 6.9 6.6 105
Lewis Lake Divide 7850 12.0 11.6 103 18.1 14.8 122
Loomis Park 8240 4.4 5.8 76 7.1 7.3 97
Phillips Bench 8200 7.7 9.4 82 11.4 11.2 102
Salt River Summit 7640 4.1 4.4 93 8.3 6.2 134
Snake River Station 6920 5.1 6.0 85 10.1 9.7 104
Somsen Ranch 6800 4.4 4.4 100 9.9 7.4 134
Spring Creek Divide 9000 9.0 8.8 102 11.3 9.6 118
Thumb Divide 7980 7.2 5.9 122 10.2 7.8 131
Togwotee Pass 9580 9.5 10.0 95 10.7 10.5 102
Triple Peak 8500 8.8 8.4 105 12.4 10.2 122
Two Ocean Plateau 9240 13.9 12.4 112 12.2 11.4 107
Willow Creek 8080 9.6 9.9 97 15.8 14.2 111
Younts Peak 8350 4.6 6.0 77 3.9 6.6 59
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Basin Index (%) 94 108
MADISON HEADWATERS IN WYOMING
Black Bear 8170 16.9 15.2 111 12.0 16.3 74
Canyon 7870 3.7 -M * 6.3 -M *
Madison Plateau 7750 9.8 9.0 109 12.4 10.8 115
West Yellowstone 6700 4.6 4.2 110 8.0 6.6 121
Whiskey Creek 6800 6.0 5.5 109 9.9 8.6 115
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Basin Index (%) 110 100
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 6.9 9.0 77 6.4 8.8 73
Canyon 7870 3.7 -M * 6.3 -M *
Evening Star 9200 11.1 10.8 103 10.8 13.4 81
Fisher Creek 9100 13.8 13.9 99 15.2 13.5 113
Monument Peak 8850 7.9 8.8 90 10.5 10.1 104
Northeast Entrance 7350 1.9 3.6 53 5.7 6.2 92
Parker Peak 9400 8.3 9.4 88 8.4 9.4 89
Sylvan Lake 8420 6.4 8.0 80 10.8 10.7 101
Thumb Divide 7980 7.2 5.9 122 10.2 7.8 131
Two Ocean Plateau 9240 13.9 12.4 112 12.2 11.4 107
White Mill 8700 9.2 9.8 94 9.6 9.8 98
Wolverine 7650 3.7 4.6 80 5.2 5.8 90
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Basin Index (%) 94 98
WIND RIVER
Burroughs Creek 8750 3.5 -M * 5.7 -M *
Castle Creek 8400 1.1 3.2 34 2.5 4.4 57
Cold Springs 9630 5.1 3.4 150 7.0 4.6 152
Deer Park 9700 5.4 6.0 90 8.0 7.7 104
Hobbs Park 10100 7.1 5.9 120 8.7 5.8 150
Kirwin 9550 5.5 5.2 106 6.2 5.8 107
Little Warm 9370 5.4 4.0 135 7.4 5.9 125
South Pass 9040 4.9 5.8 84 6.8 6.9 99
St. Lawrence Alt 8620 1.0 -M * 5.3 -M *
Togwotee Pass 9580 9.5 10.0 95 10.7 10.5 102
Townsend Creek 8700 3.6 3.9 92 6.7 5.4 124
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Basin Index (%) 100 112
BIGHORN BASIN
Bald Mtn. 9380 7.0 8.0 88 7.1 7.2 99
Bear Trap Meadow 8200 2.4 2.6 92 4.5 4.2 107
Bone Springs Div 9350 6.4 7.0 91 6.2 6.8 91
Grave Springs 8550 2.0 3.0 67 4.3 4.2 102
Kirwin 9550 5.5 5.2 106 6.2 5.8 107
Marquette 8760 1.0 3.4 29 3.7 4.5 82
Middle Powder 7760 2.7 4.1 66 5.0 4.9 102
Owl Creek 8975 2.9 2.5 116 3.9 3.1 126
Powder River Pass 9480 4.4 4.7 94 3.7 6.0 62
Shell Creek 9580 6.2 7.0 89 6.7 6.2 108
Timber Creek 7950 .8 2.1 38 2.6 4.0 65
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Basin Index (%) 83 95
SHOSHONE RIVER
Blackwater 9780 9.6 10.4 92 10.3 10.2 101
Evening Star 9200 11.1 10.8 103 10.8 13.4 81
Marquette 8760 1.0 3.4 29 3.7 4.5 82
Sylvan Lake 8420 6.4 8.0 80 10.8 10.7 101
Sylvan Road 7120 2.9 5.1 57 7.8 8.4 93
Younts Peak 8350 4.6 6.0 77 3.9 6.6 59
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Basin Index (%) 81 88
POWDER RIVER
Bear Trap Meadow 8200 2.4 2.6 92 4.5 4.2 107
Cloud Peak Reservoir 9860 6.1 5.8 105 7.5 6.2 121
Grave Springs 8550 2.0 3.0 67 4.3 4.2 102
Hansen Sawmill 8360 3.0 2.9 103 5.2 3.9 133
Middle Powder 7760 2.7 4.1 66 5.0 4.9 102
Powder River Pass 9480 4.4 4.7 94 3.7 6.0 62
Soldier Park 8720 .0 2.0 0 5.0 4.2 119
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Basin Index (%) 82 105
TONGUE RIVER
Big Goose 7990 2.4 3.2 75 5.6 4.7 119
Bone Springs Div 9350 6.4 7.0 91 6.2 6.8 91
Burgess Junction 7880 3.5 4.2 83 5.9 5.4 109
Dome Lake 8880 3.6 4.4 82 6.6 5.6 118
Little Goose 8870 3.1 4.0 78 7.0 5.4 130
Sucker Creek 8880 4.7 5.0 94 6.8 6.1 111
Tie Creek 6870 .8 2.0 40 5.8 4.9 118
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Basin Index (%) 82 113
BELLE FOURCHE
Blind Park 6890 1.8 2.7 67 4.1 4.6 89
Cole Canyon 5910 .8 2.0 40 4.5 4.0 112
North Rapid Creek 6130 1.6 2.9 55 2.6 3.4 76
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Basin Index (%) 55 93
CHEYENNE RIVER BASIN
Blind Park 6890 1.8 2.7 67 4.1 4.6 89
North Rapid Creek 6130 1.6 2.9 55 2.6 3.4 76
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Basin Index (%) 61 84
UPPER N. PLATTE
Arapaho Ridge 10960 8.6 9.0 96 8.5 9.8 87
Blackhall Mtn 9820 12.7 11.7 109 14.7 13.3 111
Cinnabar Park 9574 8.4 8.4 100 10.9 10.2 107
Columbine 9160 7.3 8.1 90 11.2 10.1 111
Divide Peak 8880 6.7 7.2 93 11.3 9.6 118
Joe Wright 10120 8.2 7.8 105 14.1 10.8 131
Laprele Creek 8375 1.2 3.6 33 4.5 5.1 88
Med Bow 10500 15.8 -M * 15.8 -M *
Never Summer 10280 9.6 8.2 117 7.5 8.0 94
North French Creek 10130 12.8 10.7 120 14.0 11.4 123
Old Battle 10000 13.7 11.7 117 15.7 14.0 112
Rawah 9020 3.5 4.8 73 6.6 7.4 89
Sage Creek Basin 7850 3.4 4.9 69 5.7 6.2 92
Sand Lake 10050 12.2 10.8 113 12.9 10.2 126
South Brush Creek 8440 3.8 4.2 90 6.6 5.8 114
Tower 10500 17.0 15.8 108 20.0 16.4 122
Webber Springs 9250 9.3 8.6 108 12.4 10.9 114
Whiskey Park 8950 12.6 9.2 137 15.6 11.6 134
Willow Creek Pass 9540 5.9 5.4 109 6.7 6.2 108
Zirkel 9340 9.2 10.2 90 15.1 13.0 116
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Basin Index (%) 104 113
SWEETWATER
Deer Park 9700 5.4 6.0 90 8.0 7.7 104
Larsen Creek 9000 -M 2.8 * 6.4 5.7 112
South Pass 9040 4.9 5.8 84 6.8 6.9 99
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Basin Index (%) 87 104
LOWER N. PLATTE
Casper Mtn. 7900 2.4 5.0 48 7.5 6.4 117
Laprele Creek 8375 1.2 3.6 33 4.5 5.1 88
Reno Hill 8400 3.6 5.6 64 7.5 6.5 115
Windy Peak 7900 1.6 3.0 53 5.0 4.6 109
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Basin Index (%) 51 108
LARAMIE RIVER
Brooklyn Lake 10240 9.1 7.6 120 11.6 8.4 138
Cinnabar Park 9574 8.4 8.4 100 10.9 10.2 107
Crow Creek 8330 1.0 3.6 28 4.1 4.7 87
Deadman Hill 10220 8.3 7.4 112 7.7 7.6 101
Rawah 9020 3.5 4.8 73 6.6 7.4 89
Roach 9700 6.4 6.4 100 8.8 8.2 107
Windy Peak 7900 1.6 3.0 53 5.0 4.6 109
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Basin Index (%) 93 107
S. PLATTE
Crow Creek 8330 1.0 3.6 28 4.1 4.7 87
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Basin Index (%) 28 87
LITTLE SNAKE RIVER
Battle Mountain 7440 3.4 4.0 85 8.4 6.4 131
Divide Peak 8880 6.7 7.2 93 11.3 9.6 118
Elk River 8700 7.4 5.9 125 12.0 8.2 146
Elkhead Divide 8780 7.3 -M * 11.4 -M *
Little Snake River 8915 9.4 9.6 98 16.8 14.6 115
Old Battle 10000 13.7 11.7 117 15.7 14.0 112
Sage Creek Basin 7850 3.4 4.9 69 5.7 6.2 92
Sandstone RS 8150 4.8 4.6 104 8.6 7.6 113
Whiskey Park 8950 12.6 9.2 137 15.6 11.6 134
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Basin Index (%) 108 120
UPPER GREEN RIVER
Big Sandy Opening 9080 4.1 5.4 76 6.4 5.4 119
Blind Bull Sum 8650 8.2 8.7 94 7.5 8.0 94
East Rim Divide 7930 2.9 4.0 72 5.1 5.1 100
Elkhart Park G.S. 9400 3.0 5.4 56 4.3 6.1 70
Gros Ventre Summit 8750 5.3 5.6 95 5.9 5.8 102
Gunsight Pass 9820 5.9 5.4 109 6.9 6.6 105
Indian Creek 9425 9.5 9.1 104 10.2 8.7 117
Kendall R.S. 7740 3.3 4.6 72 6.7 6.3 106
Larsen Creek 9000 -M 2.8 * 6.4 5.7 112
Loomis Park 8240 4.4 5.8 76 7.1 7.3 97
New Fork Lake 8340 3.0 4.3 70 -M 4.7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.4 4.7 72 8.2 6.0 137
Spring Creek Divide 9000 9.0 8.8 102 11.3 9.6 118
Triple Peak 8500 8.8 8.4 105 12.4 10.2 122
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Basin Index (%) 88 108
LOWER GREEN RIVER
Blacks Fork Jct 8869 3.7 3.3 112 6.3 5.7 111
Buck Pasture 9632 5.9 -M * 9.2 -M *
EF Blacks Fork GS 9360 3.8 3.8 100 7.6 5.1 149
Hams Fork 7840 2.9 4.5 64 6.7 4.9 137
Henrys Fork 10182 -M -M * 7.2 -M *
Hewinta 9500 3.5 3.3 106 8.0 6.2 129
Hickerson Park 9122 2.7 2.8 96 5.1 4.8 106
Hole-in-Rock 9168 2.6 2.9 90 5.6 4.6 122
Indian Creek 9425 9.5 9.1 104 10.2 8.7 117
Kelley R.S. 8180 4.0 5.7 70 9.3 7.4 126
Spirit Lk 10235 6.4 5.1 125 9.4 7.7 122
Steel Creek Park 10158 7.2 5.8 124 9.5 7.0 136
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Basin Index (%) 100 125
UPPER BEAR RIVER
Bear River RS 8777 3.7 3.6 103 7.4 5.2 142
Bug Lake 7987 5.9 6.2 95 10.4 7.8 133
Burts Miller Ranch 8000 2.5 2.3 109 4.0 3.5 114
Chalk Creek #1 9171 8.7 8.6 101 11.8 9.8 120
Giveout 6930 2.7 2.9 93 7.0 5.4 130
Hayden Fork 9130 6.6 5.2 127 11.6 8.6 135
Kelley R.S. 8180 4.0 5.7 70 9.3 7.4 126
Lily Lake 9133 3.8 4.7 81 8.8 7.0 126
Monte Cristo 8932 9.4 9.4 100 13.5 10.3 131
Salt River Summit 7640 4.1 4.4 93 8.3 6.2 134
Spring Creek Divide 9000 9.0 8.8 102 11.3 9.6 118
Trial Lake 9992 9.3 8.4 111 12.2 9.4 130
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Basin Index (%) 99 128
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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.
