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 FRIDAY: DECEMBER 31 , 2021
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 7.3 7.4 99 9.1 9.9 92
Blind Bull Sum 8650 9.9 9.5 104 8.6 8.4 102
Cottonwood Creek 7670 8.3 8.5 98 14.2 10.8 131
East Rim Divide 7930 -M 4.4 * -M 5.3 *
Grand Targhee 9260 17.7 19.8 89 15.6 16.0 98
Granite Creek 6770 5.9 6.3 94 9.0 8.9 101
Grassy Lake 7265 12.1 12.2 99 18.6 16.4 113
Gros Ventre Summit 8750 6.2 6.2 100 6.7 6.0 112
Gunsight Pass 9820 6.9 5.9 117 7.6 6.8 112
Lewis Lake Divide 7850 14.5 12.7 114 20.4 15.8 129
Loomis Park 8240 5.7 6.4 89 8.5 7.6 112
Phillips Bench 8200 9.6 10.2 94 13.2 12.4 106
Salt River Summit 7640 5.7 4.8 119 10.0 7.0 143
Snake River Station 6920 6.4 6.8 94 11.5 10.6 108
Somsen Ranch 6800 5.7 4.8 119 11.2 8.1 138
Spring Creek Divide 9000 10.6 10.0 106 12.9 10.4 124
Thumb Divide 7980 8.7 6.4 136 11.5 8.4 137
Togwotee Pass 9580 10.6 10.6 100 11.8 11.2 105
Triple Peak 8500 10.2 8.6 119 13.9 10.8 129
Two Ocean Plateau 9240 15.8 13.2 120 13.6 12.3 111
Willow Creek 8080 11.4 10.8 106 17.5 15.0 117
Younts Peak 8350 6.6 6.6 100 4.8 7.2 67
----- -----
Basin Index (%) 104 114
MADISON HEADWATERS IN WYOMING
Black Bear 8170 19.6 16.0 122 -M 17.8 *
Canyon 7870 4.5 -M * 7.1 -M *
Madison Plateau 7750 11.4 9.8 116 13.8 11.8 117
West Yellowstone 6700 5.5 4.6 120 8.9 7.3 122
Whiskey Creek 6800 7.1 6.0 118 10.2 9.3 110
----- -----
Basin Index (%) 120 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 7.6 9.8 78 7.2 9.2 78
Canyon 7870 4.5 -M * 7.1 -M *
Evening Star 9200 13.2 12.2 108 12.6 14.3 88
Fisher Creek 9100 15.2 15.3 99 16.5 15.4 107
Monument Peak 8850 8.4 9.0 93 11.0 10.7 103
Northeast Entrance 7350 2.2 4.0 55 6.0 6.4 94
Parker Peak 9400 9.7 10.4 93 9.6 9.8 98
Sylvan Lake 8420 7.8 8.6 91 12.3 11.6 106
Thumb Divide 7980 8.7 6.4 136 11.5 8.4 137
Two Ocean Plateau 9240 15.8 13.2 120 13.6 12.3 111
White Mill 8700 10.0 10.2 98 10.3 11.0 94
Wolverine 7650 4.9 5.4 91 6.0 6.1 98
----- -----
Basin Index (%) 99 101
WIND RIVER
Burroughs Creek 8750 3.8 -M * 6.5 -M *
Castle Creek 8400 1.5 3.3 45 2.8 4.4 64
Cold Springs 9630 5.4 3.6 150 7.3 4.8 152
Deer Park 9700 6.1 6.2 98 9.0 8.4 107
Hobbs Park 10100 8.4 6.2 135 9.4 6.1 154
Kirwin 9550 6.1 5.6 109 6.9 6.2 111
Little Warm 9370 6.1 4.4 139 8.2 6.0 137
South Pass 9040 5.8 6.0 97 7.5 7.0 107
St. Lawrence Alt 8620 .9 -M * 5.7 -M *
Togwotee Pass 9580 10.6 10.6 100 11.8 11.2 105
Townsend Creek 8700 4.1 4.0 102 7.0 5.6 125
----- -----
Basin Index (%) 108 117
BIGHORN BASIN
Bald Mtn. 9380 7.3 8.7 84 7.4 7.8 95
Bear Trap Meadow 8200 2.8 2.9 97 4.8 4.2 114
Bone Springs Div 9350 7.1 7.4 96 6.7 7.1 94
Grave Springs 8550 2.3 3.2 72 4.6 4.6 100
Kirwin 9550 6.1 5.6 109 6.9 6.2 111
Marquette 8760 1.1 3.5 31 3.9 4.8 81
Middle Powder 7760 2.9 4.3 67 5.2 5.0 104
Owl Creek 8975 3.1 2.6 119 3.8 3.2 119
Powder River Pass 9480 4.8 5.0 96 4.2 6.2 68
Shell Creek 9580 6.6 7.2 92 7.1 6.6 108
Timber Creek 7950 1.0 2.2 45 2.7 4.0 68
----- -----
Basin Index (%) 86 96
SHOSHONE RIVER
Blackwater 9780 10.6 11.0 96 11.5 10.5 110
Evening Star 9200 13.2 12.2 108 12.6 14.3 88
Marquette 8760 1.1 3.5 31 3.9 4.8 81
Sylvan Lake 8420 7.8 8.6 91 12.3 11.6 106
Sylvan Road 7120 3.6 5.7 63 9.0 8.9 101
Younts Peak 8350 6.6 6.6 100 4.8 7.2 67
----- -----
Basin Index (%) 90 94
POWDER RIVER
Bear Trap Meadow 8200 2.8 2.9 97 4.8 4.2 114
Cloud Peak Reservoir 9860 6.6 6.4 103 7.9 6.4 123
Grave Springs 8550 2.3 3.2 72 4.6 4.6 100
Hansen Sawmill 8360 3.3 3.0 110 5.6 4.2 133
Middle Powder 7760 2.9 4.3 67 5.2 5.0 104
Powder River Pass 9480 4.8 5.0 96 4.2 6.2 68
Soldier Park 8720 .3 2.4 12 5.3 4.4 120
----- -----
Basin Index (%) 85 107
TONGUE RIVER
Big Goose 7990 2.6 3.5 74 6.4 5.0 128
Bone Springs Div 9350 7.1 7.4 96 6.7 7.1 94
Burgess Junction 7880 3.7 4.5 82 6.2 5.6 111
Dome Lake 8880 4.3 4.8 90 7.0 5.8 121
Little Goose 8870 3.6 4.4 82 7.3 5.6 130
Sucker Creek 8880 5.2 5.2 100 7.4 6.2 119
Tie Creek 6870 .8 2.0 40 5.9 5.0 118
----- -----
Basin Index (%) 86 116
BELLE FOURCHE
Blind Park 6890 1.8 3.2 56 4.2 4.8 88
Cole Canyon 5910 .9 2.4 38 4.9 4.0 122
North Rapid Creek 6130 1.8 3.2 56 3.3 3.8 87
----- -----
Basin Index (%) 51 98
CHEYENNE RIVER BASIN
Blind Park 6890 1.8 3.2 56 4.2 4.8 88
North Rapid Creek 6130 1.8 3.2 56 3.3 3.8 87
----- -----
Basin Index (%) 56 87
UPPER N. PLATTE
Arapaho Ridge 10960 9.8 9.8 100 9.6 10.2 94
Blackhall Mtn 9820 14.9 12.2 122 16.8 13.6 124
Cinnabar Park 9574 9.6 8.6 112 12.1 10.8 112
Columbine 9160 8.7 8.6 101 12.6 10.4 121
Divide Peak 8880 8.0 7.6 105 12.6 9.9 127
Joe Wright 10120 9.4 8.2 115 15.5 11.3 137
Laprele Creek 8375 1.6 3.6 44 4.7 5.4 87
Med Bow 10500 17.8 -M * 17.3 -M *
Never Summer 10280 10.8 8.4 129 8.3 8.2 101
North French Creek 10130 14.0 11.5 122 15.2 11.9 128
Old Battle 10000 15.5 12.2 127 17.5 14.2 123
Rawah 9020 4.1 4.8 85 7.1 7.6 93
Sage Creek Basin 7850 4.2 5.3 79 6.5 6.3 103
Sand Lake 10050 13.6 11.4 119 14.3 10.6 135
South Brush Creek 8440 4.5 4.6 98 7.3 6.0 122
Tower 10500 19.0 16.6 114 21.6 16.8 129
Webber Springs 9250 11.0 9.0 122 14.2 11.1 128
Whiskey Park 8950 13.9 9.8 142 17.0 12.4 137
Willow Creek Pass 9540 6.9 5.8 119 7.6 6.6 115
Zirkel 9340 11.3 10.6 107 17.3 13.1 132
----- -----
Basin Index (%) 113 121
SWEETWATER
Deer Park 9700 6.1 6.2 98 9.0 8.4 107
Larsen Creek 9000 -M 2.9 * 7.0 5.8 121
South Pass 9040 5.8 6.0 97 7.5 7.0 107
----- -----
Basin Index (%) 98 111
LOWER N. PLATTE
Casper Mtn. 7900 2.6 5.4 48 7.8 6.6 118
Laprele Creek 8375 1.6 3.6 44 4.7 5.4 87
Reno Hill 8400 4.0 5.8 69 7.9 6.6 120
Windy Peak 7900 2.3 3.0 77 5.4 4.7 115
----- -----
Basin Index (%) 59 111
LARAMIE RIVER
Brooklyn Lake 10240 10.6 8.4 126 12.9 8.9 145
Cinnabar Park 9574 9.6 8.6 112 12.1 10.8 112
Crow Creek 8330 1.3 3.8 34 4.4 5.2 85
Deadman Hill 10220 9.6 7.7 125 8.8 8.0 110
Rawah 9020 4.1 4.8 85 7.1 7.6 93
Roach 9700 7.7 6.6 117 10.1 8.9 113
Windy Peak 7900 2.3 3.0 77 5.4 4.7 115
----- -----
Basin Index (%) 105 112
S. PLATTE
Crow Creek 8330 1.3 3.8 34 4.4 5.2 85
----- -----
Basin Index (%) 34 85
LITTLE SNAKE RIVER
Battle Mountain 7440 4.3 4.2 102 9.2 6.6 139
Divide Peak 8880 8.0 7.6 105 12.6 9.9 127
Elk River 8700 9.1 6.5 140 13.5 8.6 157
Elkhead Divide 8780 9.3 -M * 13.4 -M *
Little Snake River 8915 10.8 10.0 108 18.5 15.0 123
Old Battle 10000 15.5 12.2 127 17.5 14.2 123
Sage Creek Basin 7850 4.2 5.3 79 6.5 6.3 103
Sandstone RS 8150 5.7 4.9 116 9.4 7.8 121
Whiskey Park 8950 13.9 9.8 142 17.0 12.4 137
----- -----
Basin Index (%) 118 129
UPPER GREEN RIVER
Big Sandy Opening 9080 4.9 5.9 83 7.1 5.9 120
Blind Bull Sum 8650 9.9 9.5 104 8.6 8.4 102
East Rim Divide 7930 -M 4.4 * -M 5.3 *
Elkhart Park G.S. 9400 3.8 5.8 66 5.0 6.3 79
Gros Ventre Summit 8750 6.2 6.2 100 6.7 6.0 112
Gunsight Pass 9820 6.9 5.9 117 7.6 6.8 112
Indian Creek 9425 11.6 9.9 117 11.9 9.2 129
Kendall R.S. 7740 4.3 5.2 83 7.6 6.7 113
Larsen Creek 9000 -M 2.9 * 7.0 5.8 121
Loomis Park 8240 5.7 6.4 89 8.5 7.6 112
New Fork Lake 8340 3.7 4.6 80 5.1 5.2 98
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.5 5.0 90 9.5 6.4 148
Spring Creek Divide 9000 10.6 10.0 106 12.9 10.4 124
Triple Peak 8500 10.2 8.6 119 13.9 10.8 129
----- -----
Basin Index (%) 99 117
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.5 3.3 136 7.2 5.8 124
Buck Pasture 9632 7.0 -M * 10.3 -M *
EF Blacks Fork GS 9360 5.2 4.0 130 7.2 5.2 138
Hams Fork 7840 4.1 4.6 89 7.4 5.2 142
Henrys Fork 10182 -M -M * 7.5 -M *
Hewinta 9500 4.4 3.8 116 9.0 6.6 136
Hickerson Park 9122 3.0 3.0 100 5.3 4.9 108
Hole-in-Rock 9168 2.9 2.9 100 5.9 4.9 120
Indian Creek 9425 11.6 9.9 117 11.9 9.2 129
Kelley R.S. 8180 5.4 6.0 90 10.7 7.8 137
Spirit Lk 10235 7.2 5.2 138 9.9 7.8 127
Steel Creek Park 10158 8.0 6.0 133 10.4 7.3 142
----- -----
Basin Index (%) 116 131
UPPER BEAR RIVER
Bear River RS 8777 4.8 3.6 133 8.3 5.3 157
Bug Lake 7987 8.0 6.4 125 11.9 8.0 149
Burts Miller Ranch 8000 3.2 2.3 139 4.4 3.7 119
Chalk Creek #1 9171 11.0 8.8 125 13.7 10.2 134
Giveout 6930 4.1 3.2 128 8.0 5.8 138
Hayden Fork 9130 8.3 5.6 148 13.5 8.8 153
Kelley R.S. 8180 5.4 6.0 90 10.7 7.8 137
Lily Lake 9133 5.3 4.8 110 10.1 7.2 140
Monte Cristo 8932 12.1 9.8 123 14.0 11.0 127
Salt River Summit 7640 5.7 4.8 119 10.0 7.0 143
Spring Creek Divide 9000 10.6 10.0 106 12.9 10.4 124
Trial Lake 9992 12.2 8.4 145 12.4 9.6 129
----- -----
Basin Index (%) 123 137
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.