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 WEDNESDAY: DECEMBER 29 , 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 6.4 7.0 91 8.9 9.8 91
Blind Bull Sum 8650 8.8 9.2 96 7.9 8.3 95
Cottonwood Creek 7670 7.7 8.2 94 13.6 10.2 133
East Rim Divide 7930 3.3 4.4 75 5.6 5.2 108
Grand Targhee 9260 16.6 19.6 85 15.3 15.7 97
Granite Creek 6770 5.0 6.2 81 -M 8.8 *
Grassy Lake 7265 10.4 11.9 87 17.1 15.8 108
Gros Ventre Summit 8750 5.7 6.1 93 6.3 5.9 107
Gunsight Pass 9820 6.4 5.7 112 7.3 6.8 107
Lewis Lake Divide 7850 12.9 12.6 102 18.9 15.4 123
Loomis Park 8240 4.9 6.2 79 7.7 7.6 101
Phillips Bench 8200 8.2 9.6 85 11.9 12.0 99
Salt River Summit 7640 4.9 4.6 107 9.1 6.7 136
Snake River Station 6920 5.5 6.4 86 10.5 10.2 103
Somsen Ranch 6800 5.0 4.6 109 10.4 7.8 133
Spring Creek Divide 9000 9.6 9.3 103 11.9 10.0 119
Thumb Divide 7980 7.8 6.0 130 10.7 8.0 134
Togwotee Pass 9580 10.0 10.2 98 11.3 10.8 105
Triple Peak 8500 9.3 8.7 107 12.8 10.5 122
Two Ocean Plateau 9240 14.6 12.6 116 12.7 11.6 109
Willow Creek 8080 10.3 10.5 98 16.5 14.7 112
Younts Peak 8350 4.9 6.0 82 4.3 6.9 62
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Basin Index (%) 96 110
MADISON HEADWATERS IN WYOMING
Black Bear 8170 17.9 15.8 113 -M 16.9 *
Canyon 7870 3.9 -M * 6.5 -M *
Madison Plateau 7750 10.3 9.5 108 13.0 11.2 116
West Yellowstone 6700 4.9 4.4 111 8.3 7.0 119
Whiskey Creek 6800 6.3 5.8 109 10.0 8.9 112
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Basin Index (%) 111 115
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 7.1 9.4 76 6.5 9.2 71
Canyon 7870 3.9 -M * 6.5 -M *
Evening Star 9200 11.9 11.4 104 11.7 14.0 84
Fisher Creek 9100 14.2 14.0 101 15.6 14.2 110
Monument Peak 8850 8.0 9.0 89 10.7 10.2 105
Northeast Entrance 7350 1.9 3.9 49 5.8 6.2 94
Parker Peak 9400 8.7 9.8 89 8.8 9.6 92
Sylvan Lake 8420 7.1 8.4 85 11.5 11.2 103
Thumb Divide 7980 7.8 6.0 130 10.7 8.0 134
Two Ocean Plateau 9240 14.6 12.6 116 12.7 11.6 109
White Mill 8700 9.4 10.1 93 9.7 10.0 97
Wolverine 7650 4.1 5.0 82 5.6 5.9 95
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Basin Index (%) 95 99
WIND RIVER
Burroughs Creek 8750 3.7 -M * 6.0 -M *
Castle Creek 8400 1.2 3.2 38 2.5 4.4 57
Cold Springs 9630 5.1 3.5 146 7.1 4.6 154
Deer Park 9700 5.6 6.2 90 8.1 8.0 101
Hobbs Park 10100 7.4 6.0 123 9.0 6.0 150
Kirwin 9550 5.8 5.4 107 6.4 6.0 107
Little Warm 9370 5.7 4.2 136 7.7 6.0 128
South Pass 9040 5.0 6.0 83 6.8 7.0 97
St. Lawrence Alt 8620 1.2 -M * 5.5 -M *
Togwotee Pass 9580 10.0 10.2 98 11.3 10.8 105
Townsend Creek 8700 3.7 3.9 95 6.8 5.6 121
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Basin Index (%) 102 112
BIGHORN BASIN
Bald Mtn. 9380 7.1 8.4 85 7.1 7.6 93
Bear Trap Meadow 8200 2.6 2.8 93 4.6 4.2 110
Bone Springs Div 9350 6.7 7.1 94 6.4 6.9 93
Grave Springs 8550 2.1 3.1 68 4.4 4.4 100
Kirwin 9550 5.8 5.4 107 6.4 6.0 107
Marquette 8760 1.1 3.4 32 3.8 4.6 83
Middle Powder 7760 2.8 4.1 68 5.0 4.9 102
Owl Creek 8975 3.0 2.6 115 4.5 3.2 141
Powder River Pass 9480 4.7 4.8 98 3.9 6.1 64
Shell Creek 9580 6.3 7.1 89 6.9 6.4 108
Timber Creek 7950 .9 2.2 41 2.5 4.0 62
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Basin Index (%) 85 95
SHOSHONE RIVER
Blackwater 9780 10.0 10.8 93 10.8 10.3 105
Evening Star 9200 11.9 11.4 104 11.7 14.0 84
Marquette 8760 1.1 3.4 32 3.8 4.6 83
Sylvan Lake 8420 7.1 8.4 85 11.5 11.2 103
Sylvan Road 7120 3.3 5.3 62 8.1 8.5 95
Younts Peak 8350 4.9 6.0 82 4.3 6.9 62
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Basin Index (%) 85 90
POWDER RIVER
Bear Trap Meadow 8200 2.6 2.8 93 4.6 4.2 110
Cloud Peak Reservoir 9860 6.3 6.2 102 7.8 6.4 122
Grave Springs 8550 2.1 3.1 68 4.4 4.4 100
Hansen Sawmill 8360 3.2 3.0 107 5.3 4.0 132
Middle Powder 7760 2.8 4.1 68 5.0 4.9 102
Powder River Pass 9480 4.7 4.8 98 3.9 6.1 64
Soldier Park 8720 .0 2.2 0 5.1 4.4 116
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Basin Index (%) 83 105
TONGUE RIVER
Big Goose 7990 2.5 3.2 78 6.0 4.8 125
Bone Springs Div 9350 6.7 7.1 94 6.4 6.9 93
Burgess Junction 7880 3.5 4.5 78 6.1 5.6 109
Dome Lake 8880 3.8 4.6 83 6.8 5.6 121
Little Goose 8870 3.4 4.2 81 7.2 5.6 129
Sucker Creek 8880 4.9 5.0 98 7.1 6.2 115
Tie Creek 6870 .8 2.0 40 5.9 5.0 118
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Basin Index (%) 84 115
BELLE FOURCHE
Blind Park 6890 1.8 2.8 64 4.1 4.8 85
Cole Canyon 5910 .9 2.2 41 5.2 4.0 130
North Rapid Creek 6130 1.6 3.2 50 3.1 3.6 86
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Basin Index (%) 52 100
CHEYENNE RIVER BASIN
Blind Park 6890 1.8 2.8 64 4.1 4.8 85
North Rapid Creek 6130 1.6 3.2 50 3.1 3.6 86
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Basin Index (%) 57 86
UPPER N. PLATTE
Arapaho Ridge 10960 9.0 9.2 98 8.9 10.0 89
Blackhall Mtn 9820 13.7 12.1 113 15.7 13.5 116
Cinnabar Park 9574 9.0 8.4 107 11.6 10.6 109
Columbine 9160 8.1 8.4 96 11.9 10.2 117
Divide Peak 8880 7.1 7.2 99 11.8 9.8 120
Joe Wright 10120 8.7 8.1 107 14.8 11.2 132
Laprele Creek 8375 1.4 3.6 39 4.6 5.2 88
Med Bow 10500 16.9 -M * 16.6 -M *
Never Summer 10280 10.2 8.2 124 7.8 8.2 95
North French Creek 10130 13.4 11.2 120 14.6 11.8 124
Old Battle 10000 14.5 11.8 123 16.4 14.0 117
Rawah 9020 3.9 4.8 81 7.0 7.6 92
Sage Creek Basin 7850 3.6 5.0 72 6.0 6.3 95
Sand Lake 10050 12.9 11.2 115 13.7 10.4 132
South Brush Creek 8440 4.2 4.4 95 6.9 5.8 119
Tower 10500 17.9 16.4 109 20.6 16.5 125
Webber Springs 9250 9.9 8.8 112 13.1 11.0 119
Whiskey Park 8950 13.3 9.3 143 16.3 11.8 138
Willow Creek Pass 9540 6.4 5.5 116 7.1 6.4 111
Zirkel 9340 10.1 10.4 97 16.2 13.0 125
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Basin Index (%) 108 116
SWEETWATER
Deer Park 9700 5.6 6.2 90 8.1 8.0 101
Larsen Creek 9000 -M 3.0 * 6.4 5.8 110
South Pass 9040 5.0 6.0 83 6.8 7.0 97
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Basin Index (%) 87 102
LOWER N. PLATTE
Casper Mtn. 7900 2.5 5.2 48 7.5 6.6 114
Laprele Creek 8375 1.4 3.6 39 4.6 5.2 88
Reno Hill 8400 3.7 5.8 64 7.6 6.5 117
Windy Peak 7900 1.8 3.0 60 5.1 4.6 111
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Basin Index (%) 53 108
LARAMIE RIVER
Brooklyn Lake 10240 9.9 8.0 124 12.4 8.8 141
Cinnabar Park 9574 9.0 8.4 107 11.6 10.6 109
Crow Creek 8330 1.0 3.8 26 4.2 5.2 81
Deadman Hill 10220 8.9 7.4 120 8.3 7.8 106
Rawah 9020 3.9 4.8 81 7.0 7.6 92
Roach 9700 6.9 6.5 106 9.2 8.6 107
Windy Peak 7900 1.8 3.0 60 5.1 4.6 111
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Basin Index (%) 99 109
S. PLATTE
Crow Creek 8330 1.0 3.8 26 4.2 5.2 81
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Basin Index (%) 26 81
LITTLE SNAKE RIVER
Battle Mountain 7440 3.9 4.1 95 8.8 6.4 138
Divide Peak 8880 7.1 7.2 99 11.8 9.8 120
Elk River 8700 8.0 6.3 127 12.6 8.4 150
Elkhead Divide 8780 7.9 -M * 12.0 -M *
Little Snake River 8915 10.0 9.6 104 17.7 14.8 120
Old Battle 10000 14.5 11.8 123 16.4 14.0 117
Sage Creek Basin 7850 3.6 5.0 72 6.0 6.3 95
Sandstone RS 8150 5.3 4.6 115 9.0 7.6 118
Whiskey Park 8950 13.3 9.3 143 16.3 11.8 138
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Basin Index (%) 113 125
UPPER GREEN RIVER
Big Sandy Opening 9080 4.2 5.8 72 6.3 5.8 109
Blind Bull Sum 8650 8.8 9.2 96 7.9 8.3 95
East Rim Divide 7930 3.3 4.4 75 5.6 5.2 108
Elkhart Park G.S. 9400 3.1 5.6 55 4.3 6.2 69
Gros Ventre Summit 8750 5.7 6.1 93 6.3 5.9 107
Gunsight Pass 9820 6.4 5.7 112 7.3 6.8 107
Indian Creek 9425 10.4 9.6 108 10.9 9.0 121
Kendall R.S. 7740 3.4 4.9 69 6.9 6.4 108
Larsen Creek 9000 -M 3.0 * 6.4 5.8 110
Loomis Park 8240 4.9 6.2 79 7.7 7.6 101
New Fork Lake 8340 3.2 4.4 73 -M 5.1 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.8 5.0 76 8.8 6.2 142
Spring Creek Divide 9000 9.6 9.3 103 11.9 10.0 119
Triple Peak 8500 9.3 8.7 107 12.8 10.5 122
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Basin Index (%) 90 110
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.0 3.2 125 6.7 5.7 118
Buck Pasture 9632 6.4 -M * 9.7 -M *
EF Blacks Fork GS 9360 4.4 3.9 113 8.1 5.1 159
Hams Fork 7840 3.3 4.5 73 7.0 5.1 137
Henrys Fork 10182 -M -M * 7.9 -M *
Hewinta 9500 3.9 3.3 118 8.4 6.3 133
Hickerson Park 9122 2.8 2.8 100 5.2 4.8 108
Hole-in-Rock 9168 2.6 2.9 90 5.6 4.8 117
Indian Creek 9425 10.4 9.6 108 10.9 9.0 121
Kelley R.S. 8180 4.3 6.0 72 9.5 7.8 122
Spirit Lk 10235 6.8 5.2 131 9.7 7.8 124
Steel Creek Park 10158 7.6 5.8 131 9.9 7.2 138
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Basin Index (%) 106 127
UPPER BEAR RIVER
Bear River RS 8777 4.0 3.6 111 7.7 5.2 148
Bug Lake 7987 6.3 6.4 98 10.7 8.0 134
Burts Miller Ranch 8000 2.7 2.3 117 4.1 3.5 117
Chalk Creek #1 9171 9.3 8.8 106 12.4 10.0 124
Giveout 6930 3.2 3.0 107 7.4 5.6 132
Hayden Fork 9130 7.4 5.4 137 12.5 8.8 142
Kelley R.S. 8180 4.3 6.0 72 9.5 7.8 122
Lily Lake 9133 4.3 4.8 90 9.3 7.1 131
Monte Cristo 8932 10.0 9.8 102 13.9 10.8 129
Salt River Summit 7640 4.9 4.6 107 9.1 6.7 136
Spring Creek Divide 9000 9.6 9.3 103 11.9 10.0 119
Trial Lake 9992 10.5 8.4 125 12.9 9.5 136
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Basin Index (%) 106 131
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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.