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 SUNDAY: DECEMBER 25 , 2022
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 7.0 6.4 109 8.0 9.2 87
Blind Bull Sum 8650 7.8 8.4 93 5.6 7.9 71
Cottonwood Creek 7670 7.9 7.8 101 8.5 9.8 87
East Rim Divide 7930 4.1 3.8 108 4.2 4.8 88
Grand Targhee 9260 19.1 18.0 106 11.6 15.0 77
Granite Creek 6770 5.8 5.9 98 5.6 8.2 68
Grassy Lake 7265 11.9 11.0 108 15.2 14.0 109
Gros Ventre Summit 8750 5.1 5.3 96 5.4 5.8 93
Gunsight Pass 9820 5.4 5.0 108 5.5 6.4 86
Lewis Lake Divide 7850 14.0 11.2 125 16.9 14.6 116
Loomis Park 8240 5.8 5.6 104 6.0 7.0 86
Phillips Bench 8200 10.9 9.2 118 11.5 10.8 106
Salt River Summit 7640 5.7 4.4 130 5.7 6.2 92
Snake River Station 6920 7.7 6.0 128 10.2 9.6 106
Somsen Ranch 6800 6.2 4.0 155 7.8 7.0 111
Spring Creek Divide 9000 -M 8.7 * -M 9.4 *
Thumb Divide 7980 9.2 5.6 164 9.2 7.8 118
Togwotee Pass 9580 9.0 9.9 91 9.1 10.4 88
Triple Peak 8500 8.6 8.2 105 9.0 9.8 92
Two Ocean Plateau 9240 14.4 12.0 120 11.6 11.0 105
Willow Creek 8080 11.3 9.8 115 12.3 14.1 87
Younts Peak 8350 6.8 5.8 117 6.4 6.4 100
----- -----
Basin Index (%) 112 95
MADISON HEADWATERS IN WYOMING
Black Bear 8170 17.3 14.9 116 18.0 15.8 114
Canyon 7870 6.7 -M * 8.4 -M *
Madison Plateau 7750 12.3 8.6 143 13.9 10.5 132
West Yellowstone 6700 6.8 4.2 162 9.4 6.0 157
Whiskey Creek 6800 8.7 5.4 161 12.5 8.3 151
----- -----
Basin Index (%) 136 133
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 8.1 9.0 90 7.4 8.5 87
Canyon 7870 6.7 -M * 8.4 -M *
Evening Star 9200 10.8 10.8 100 13.2 13.4 99
Fisher Creek 9100 15.0 13.6 110 16.4 13.3 123
Monument Peak 8850 9.0 8.7 103 11.3 10.0 113
Northeast Entrance 7350 4.3 3.3 130 6.4 6.2 103
Parker Peak 9400 10.0 9.2 109 9.8 9.2 107
Sylvan Lake 8420 8.0 8.0 100 10.6 10.6 100
Thumb Divide 7980 9.2 5.6 164 9.2 7.8 118
Two Ocean Plateau 9240 14.4 12.0 120 11.6 11.0 105
White Mill 8700 10.8 9.8 110 11.0 9.8 112
Wolverine 7650 5.7 4.6 124 6.1 5.7 107
----- -----
Basin Index (%) 111 107
WIND RIVER
Burroughs Creek 8750 4.3 -M * 4.9 -M *
Castle Creek 8400 2.8 3.1 90 3.5 4.4 80
Cold Springs 9630 3.8 3.4 112 4.9 4.4 111
Deer Park 9700 9.6 5.4 178 10.0 7.3 137
Hobbs Park 10100 7.3 5.8 126 6.8 5.6 121
Kirwin 9550 4.3 5.2 83 5.7 5.5 104
Little Warm 9370 4.5 4.0 112 5.4 5.8 93
South Pass 9040 7.2 5.6 129 6.5 6.6 98
St. Lawrence Alt 8620 2.9 -M * 4.5 -M *
Togwotee Pass 9580 9.0 9.9 91 9.1 10.4 88
Townsend Creek 8700 4.4 3.8 116 5.1 5.3 96
----- -----
Basin Index (%) 115 103
BIGHORN BASIN
Bald Mtn. 9380 7.4 7.8 95 6.4 7.2 89
Bear Trap Meadow 8200 3.8 2.6 146 4.6 4.1 112
Bone Springs Div 9350 5.1 6.8 75 5.3 6.6 80
Grave Springs 8550 4.4 3.0 147 4.9 4.0 122
Kirwin 9550 4.3 5.2 83 5.7 5.5 104
Marquette 8760 3.1 3.4 91 3.9 4.4 89
Middle Powder 7760 5.7 3.8 150 5.1 4.8 106
Owl Creek 8975 3.4 2.4 142 4.0 3.0 133
Powder River Pass 9480 4.4 4.4 100 5.8 5.8 100
Shell Creek 9580 5.2 6.9 75 6.0 6.2 97
Timber Creek 7950 2.0 1.9 105 2.7 3.8 71
----- -----
Basin Index (%) 101 98
SHOSHONE RIVER
Blackwater 9780 9.8 10.4 94 9.8 9.8 100
Evening Star 9200 10.8 10.8 100 13.2 13.4 99
Marquette 8760 3.1 3.4 91 3.9 4.4 89
Sylvan Lake 8420 8.0 8.0 100 10.6 10.6 100
Sylvan Road 7120 4.5 4.9 92 6.9 8.2 84
Younts Peak 8350 6.8 5.8 117 6.4 6.4 100
----- -----
Basin Index (%) 99 96
POWDER RIVER
Bear Trap Meadow 8200 3.8 2.6 146 4.6 4.1 112
Cloud Peak Reservoir 9860 6.1 5.8 105 6.3 6.2 102
Grave Springs 8550 4.4 3.0 147 4.9 4.0 122
Hansen Sawmill 8360 3.6 2.7 133 3.9 3.8 103
Middle Powder 7760 5.7 3.8 150 5.1 4.8 106
Powder River Pass 9480 4.4 4.4 100 5.8 5.8 100
Soldier Park 8720 2.0 2.0 100 3.3 4.0 82
----- -----
Basin Index (%) 123 104
TONGUE RIVER
Big Goose 7990 4.2 3.2 131 4.8 4.5 107
Bone Springs Div 9350 5.1 6.8 75 5.3 6.6 80
Burgess Junction 7880 5.2 4.2 124 6.8 5.1 133
Dome Lake 8880 3.6 4.4 82 5.3 5.4 98
Little Goose 8870 4.5 3.7 122 5.4 5.2 104
Sucker Creek 8880 5.3 4.8 110 7.3 6.0 122
Tie Creek 6870 3.4 1.8 189 5.8 4.8 121
----- -----
Basin Index (%) 108 108
BELLE FOURCHE
Blind Park 6890 3.4 2.6 131 4.9 4.6 107
Cole Canyon 5910 2.7 1.8 150 3.9 4.0 98
North Rapid Creek 6130 3.6 2.8 129 4.0 3.4 118
----- -----
Basin Index (%) 135 107
CHEYENNE RIVER BASIN
Blind Park 6890 3.4 2.6 131 4.9 4.6 107
North Rapid Creek 6130 3.6 2.8 129 4.0 3.4 118
----- -----
Basin Index (%) 130 111
UPPER N. PLATTE
Arapaho Ridge 10976 8.4 8.9 94 8.7 9.4 93
Blackhall Mtn 9839 11.0 11.3 97 12.1 12.9 94
Cinnabar Park 9707 -M 8.0 * 7.5 9.7 77
Columbine 9167 8.5 8.0 106 9.4 9.7 97
Divide Peak 8730 7.6 6.8 112 9.7 9.1 107
Joe Wright 10158 8.5 7.7 110 11.1 10.6 105
Laprele Creek 8390 2.9 3.4 85 3.2 5.0 64
Med Bow 10512 10.7 -M * 11.0 -M *
Never Summer 10323 9.8 8.0 122 6.8 8.0 85
North French Creek 10153 9.0 10.2 88 9.2 10.9 84
Old Battle 9860 10.2 11.4 89 12.2 13.7 89
Rawah 9069 6.2 4.4 141 7.2 7.2 100
Sage Creek Basin 7850 5.9 4.6 128 7.1 5.8 122
Sand Lake 10098 9.0 10.6 85 9.4 10.0 94
South Brush Creek 8495 6.2 4.1 151 5.6 5.8 97
Tower 10620 15.1 15.6 97 15.7 16.2 97
Webber Springs 9260 7.6 8.6 88 8.6 10.7 80
Whiskey Park 9020 10.9 8.8 124 11.6 11.2 104
Willow Creek Pass 9523 6.0 5.3 113 6.9 6.1 113
Zirkel 9338 8.6 9.8 88 10.8 12.8 84
----- -----
Basin Index (%) 103 94
SWEETWATER
Deer Park 9700 9.6 5.4 178 10.0 7.3 137
Larsen Creek 9000 3.3 2.8 118 5.5 5.6 98
South Pass 9040 7.2 5.6 129 6.5 6.6 98
----- -----
Basin Index (%) 146 113
LOWER N. PLATTE
Casper Mtn. 7920 4.0 4.8 83 4.1 6.2 66
Laprele Creek 8390 2.9 3.4 85 3.2 5.0 64
Reno Hill 8430 4.9 5.6 88 6.3 6.4 98
Windy Peak 7915 2.2 3.0 73 2.9 4.6 63
----- -----
Basin Index (%) 83 74
LARAMIE RIVER
Brooklyn Lake 10250 6.8 7.6 89 8.0 8.0 100
Cinnabar Park 9707 -M 8.0 * 7.5 9.7 77
Crow Creek 8335 1.7 3.4 50 3.5 4.6 76
Deadman Hill 10239 7.0 7.2 97 6.6 7.4 89
Rawah 9069 6.2 4.4 141 7.2 7.2 100
Roach 9740 6.1 6.2 98 6.9 8.0 86
Windy Peak 7915 2.2 3.0 73 2.9 4.6 63
----- -----
Basin Index (%) 94 86
S. PLATTE
Crow Creek 8335 1.7 3.4 50 3.5 4.6 76
----- -----
Basin Index (%) 50 76
LITTLE SNAKE RIVER
Battle Mountain 7498 5.9 3.6 164 8.8 6.2 142
Divide Peak 8730 7.6 6.8 112 9.7 9.1 107
Elk River 8739 8.6 5.8 148 9.1 7.8 117
Elkhead Divide 8800 8.6 -M * -M -M *
Little Snake River 8928 8.9 9.3 96 13.1 14.0 94
Old Battle 9860 10.2 11.4 89 12.2 13.7 89
Sage Creek Basin 7850 5.9 4.6 128 7.1 5.8 122
Sandstone RS 8152 6.2 4.2 148 8.0 7.4 108
Whiskey Park 9020 10.9 8.8 124 11.6 11.2 104
----- -----
Basin Index (%) 118 106
UPPER GREEN RIVER
Big Sandy Opening 9080 5.7 5.0 114 5.6 5.2 108
Blind Bull Sum 8650 7.8 8.4 93 5.6 7.9 71
East Rim Divide 7930 4.1 3.8 108 4.2 4.8 88
Elkhart Park G.S. 9400 4.8 4.8 100 4.2 5.9 71
Gros Ventre Summit 8750 5.1 5.3 96 5.4 5.8 93
Gunsight Pass 9820 5.4 5.0 108 5.5 6.4 86
Indian Creek 9425 8.5 8.5 100 7.2 8.1 89
Kendall R.S. 7740 4.2 4.4 95 4.7 6.0 78
Larsen Creek 9000 3.3 2.8 118 5.5 5.6 98
Loomis Park 8240 5.8 5.6 104 6.0 7.0 86
New Fork Lake 8340 4.4 4.1 107 -M 4.6 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.1 4.6 89 5.3 5.8 91
Spring Creek Divide 9000 -M 8.7 * -M 9.4 *
Triple Peak 8500 8.6 8.2 105 9.0 9.8 92
----- -----
Basin Index (%) 102 87
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.8 3.2 181 6.0 5.6 107
Buck Pasture 9632 7.3 -M * 8.6 -M *
EF Blacks Fork GS 9360 7.1 3.8 187 5.0 5.1 98
Hams Fork 7840 4.2 4.2 100 3.9 4.8 81
Henrys Fork 10182 -M -M * 6.3 -M *
Hewinta 9500 4.6 3.2 144 6.6 6.2 106
Hickerson Park 9122 4.2 2.7 156 5.1 4.7 109
Hole-in-Rock 9168 3.0 2.9 103 4.9 4.6 107
Indian Creek 9425 8.5 8.5 100 7.2 8.1 89
Kelley R.S. 8180 6.4 5.4 119 6.7 7.0 96
Spirit Lk 10235 7.8 4.9 159 7.9 7.7 103
Steel Creek Park 10158 8.2 5.6 146 8.2 7.0 117
----- -----
Basin Index (%) 135 101
UPPER BEAR RIVER
Bear River RS 8777 4.7 3.4 138 5.8 5.2 112
Bug Lake 7987 7.8 5.8 134 7.3 7.6 96
Burts Miller Ranch 8000 3.6 2.4 150 6.4 3.4 188
Chalk Creek #1 9171 9.4 8.4 112 10.1 9.6 105
Giveout 6930 3.5 2.8 125 4.7 5.4 87
Hayden Fork 9130 6.0 4.9 122 9.2 8.2 112
Kelley R.S. 8180 6.4 5.4 119 6.7 7.0 96
Lily Lake 9133 6.3 4.6 137 6.5 7.0 93
Monte Cristo 8932 11.4 9.0 127 12.2 10.0 122
Salt River Summit 7640 5.7 4.4 130 5.7 6.2 92
Spring Creek Divide 9000 -M 8.7 * -M 9.4 *
Trial Lake 9992 9.3 7.7 121 10.1 8.8 115
----- -----
Basin Index (%) 126 108
-----------------------------------------------------------------------------
-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.
