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 THURSDAY: DECEMBER 29 , 2022
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 7.8 7.0 111 8.6 9.8 88
Blind Bull Sum 8650 9.5 9.2 103 6.4 8.3 77
Cottonwood Creek 7670 9.1 8.2 111 9.8 10.2 96
East Rim Divide 7930 4.4 4.4 100 4.4 5.2 85
Grand Targhee 9260 19.5 19.6 99 12.1 15.7 77
Granite Creek 6770 6.8 6.2 110 6.4 8.8 73
Grassy Lake 7265 13.3 11.9 112 16.6 15.8 105
Gros Ventre Summit 8750 5.8 6.1 95 5.6 5.9 95
Gunsight Pass 9820 5.9 5.7 104 5.8 6.8 85
Lewis Lake Divide 7850 16.0 12.6 127 18.6 15.4 121
Loomis Park 8240 6.5 6.2 105 6.7 7.6 88
Phillips Bench 8200 12.2 9.6 127 12.8 12.0 107
Salt River Summit 7640 6.6 4.6 143 6.6 6.7 99
Snake River Station 6920 8.7 6.4 136 10.9 10.2 107
Somsen Ranch 6800 7.3 4.6 159 8.6 7.8 110
Spring Creek Divide 9000 9.9 9.3 106 10.1 10.0 101
Thumb Divide 7980 10.6 6.0 177 10.2 8.0 128
Togwotee Pass 9580 10.1 10.2 99 10.0 10.8 93
Triple Peak 8500 10.4 8.7 120 10.6 10.5 101
Two Ocean Plateau 9240 16.0 12.6 127 12.7 11.6 109
Willow Creek 8080 13.4 10.5 128 14.0 14.7 95
Younts Peak 8350 7.8 6.0 130 6.9 6.9 100
----- -----
Basin Index (%) 117 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 19.4 15.8 123 20.0 16.9 118
Canyon 7870 7.3 -M * 8.9 -M *
Madison Plateau 7750 13.9 9.5 146 14.9 11.2 133
West Yellowstone 6700 7.8 4.4 177 10.3 7.0 147
Whiskey Creek 6800 9.6 5.8 166 13.3 8.9 149
----- -----
Basin Index (%) 143 133
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 9.0 9.4 96 7.9 9.2 86
Canyon 7870 7.3 -M * 8.9 -M *
Evening Star 9200 12.3 11.4 108 14.5 14.0 104
Fisher Creek 9100 17.2 14.0 123 18.1 14.2 127
Monument Peak 8850 10.4 9.0 116 12.6 10.2 124
Northeast Entrance 7350 4.6 3.9 118 6.8 6.2 110
Parker Peak 9400 11.3 9.8 115 11.5 9.6 120
Sylvan Lake 8420 8.9 8.4 106 11.6 11.2 104
Thumb Divide 7980 10.6 6.0 177 10.2 8.0 128
Two Ocean Plateau 9240 16.0 12.6 127 12.7 11.6 109
White Mill 8700 12.0 10.1 119 12.0 10.0 120
Wolverine 7650 6.1 5.0 122 6.5 5.9 110
----- -----
Basin Index (%) 119 113
WIND RIVER
Burroughs Creek 8750 4.6 -M * 5.5 -M *
Castle Creek 8400 2.8 3.2 88 3.5 4.4 80
Cold Springs 9630 3.8 3.5 109 4.9 4.6 107
Deer Park 9700 10.9 6.2 176 11.1 8.0 139
Hobbs Park 10100 7.5 6.0 125 6.9 6.0 115
Kirwin 9550 4.4 5.4 81 6.0 6.0 100
Little Warm 9370 4.8 4.2 114 5.7 6.0 95
South Pass 9040 8.2 6.0 137 7.2 7.0 103
St. Lawrence Alt 8620 2.8 -M * 4.5 -M *
Togwotee Pass 9580 10.1 10.2 99 10.0 10.8 93
Townsend Creek 8700 4.4 3.9 113 5.2 5.6 93
----- -----
Basin Index (%) 117 104
BIGHORN BASIN
Bald Mtn. 9380 8.2 8.4 98 6.9 7.6 91
Bear Trap Meadow 8200 3.7 2.8 132 4.5 4.2 107
Bone Springs Div 9350 -M 7.1 * 5.4 6.9 78
Grave Springs 8550 4.5 3.1 145 5.0 4.4 114
Kirwin 9550 4.4 5.4 81 6.0 6.0 100
Marquette 8760 2.9 3.4 85 3.7 4.6 80
Middle Powder 7760 5.8 4.1 141 5.1 4.9 104
Owl Creek 8975 3.3 2.6 127 3.9 3.2 122
Powder River Pass 9480 4.6 4.8 96 6.0 6.1 98
Shell Creek 9580 5.4 7.1 76 6.2 6.4 97
Timber Creek 7950 2.0 2.2 91 2.4 4.0 60
----- -----
Basin Index (%) 102 95
SHOSHONE RIVER
Blackwater 9780 10.6 10.8 98 10.3 10.3 100
Evening Star 9200 12.3 11.4 108 14.5 14.0 104
Marquette 8760 2.9 3.4 85 3.7 4.6 80
Sylvan Lake 8420 8.9 8.4 106 11.6 11.2 104
Sylvan Road 7120 5.2 5.3 98 7.6 8.5 89
Younts Peak 8350 7.8 6.0 130 6.9 6.9 100
----- -----
Basin Index (%) 105 98
POWDER RIVER
Bear Trap Meadow 8200 3.7 2.8 132 4.5 4.2 107
Cloud Peak Reservoir 9860 6.4 6.2 103 6.5 6.4 102
Grave Springs 8550 4.5 3.1 145 5.0 4.4 114
Hansen Sawmill 8360 3.4 3.0 113 3.8 4.0 95
Middle Powder 7760 5.8 4.1 141 5.1 4.9 104
Powder River Pass 9480 4.6 4.8 96 6.0 6.1 98
Soldier Park 8720 1.7 2.2 77 3.2 4.4 73
----- -----
Basin Index (%) 115 99
TONGUE RIVER
Big Goose 7990 4.3 3.2 134 5.0 4.8 104
Bone Springs Div 9350 -M 7.1 * 5.4 6.9 78
Burgess Junction 7880 5.8 4.5 129 7.1 5.6 127
Dome Lake 8880 3.6 4.6 78 5.5 5.6 98
Little Goose 8870 4.6 4.2 110 5.6 5.6 100
Sucker Creek 8880 5.8 5.0 116 7.8 6.2 126
Tie Creek 6870 3.4 2.0 170 6.0 5.0 120
----- -----
Basin Index (%) 117 107
BELLE FOURCHE
Blind Park 6890 3.4 2.8 121 4.9 4.8 102
Cole Canyon 5910 2.7 2.2 123 3.8 4.0 95
North Rapid Creek 6130 3.6 3.2 112 4.0 3.6 111
----- -----
Basin Index (%) 118 102
CHEYENNE RIVER BASIN
Blind Park 6890 3.4 2.8 121 4.9 4.8 102
North Rapid Creek 6130 3.6 3.2 112 4.0 3.6 111
----- -----
Basin Index (%) 117 106
UPPER N. PLATTE
Arapaho Ridge 10976 10.0 9.2 109 10.2 10.0 102
Blackhall Mtn 9839 12.9 12.1 107 14.0 13.5 104
Cinnabar Park 9707 -M 8.4 * 8.5 10.6 80
Columbine 9167 9.8 8.4 117 10.4 10.2 102
Divide Peak 8730 8.7 7.2 121 10.8 9.8 110
Joe Wright 10158 9.6 8.1 119 12.2 11.2 109
Laprele Creek 8390 3.0 3.6 83 3.3 5.2 63
Med Bow 10512 12.5 -M * 12.6 -M *
Never Summer 10323 10.8 8.2 132 7.6 8.2 93
North French Creek 10153 10.4 11.2 93 10.5 11.8 89
Old Battle 9860 12.4 11.8 105 14.4 14.0 103
Rawah 9069 7.0 4.8 146 8.0 7.6 105
Sage Creek Basin 7850 7.4 5.0 148 8.6 6.3 137
Sand Lake 10098 9.7 11.2 87 10.0 10.4 96
South Brush Creek 8495 6.7 4.4 152 6.1 5.8 105
Tower 10620 18.0 16.4 110 18.1 16.5 110
Webber Springs 9260 9.2 8.8 105 10.2 11.0 93
Whiskey Park 9020 13.6 9.3 146 13.9 11.8 118
Willow Creek Pass 9523 6.9 5.5 125 7.8 6.4 122
Zirkel 9338 10.1 10.4 97 12.2 13.0 94
----- -----
Basin Index (%) 113 102
SWEETWATER
Deer Park 9700 10.9 6.2 176 11.1 8.0 139
Larsen Creek 9000 3.9 3.0 130 6.3 5.8 109
South Pass 9040 8.2 6.0 137 7.2 7.0 103
----- -----
Basin Index (%) 151 118
LOWER N. PLATTE
Casper Mtn. 7920 4.1 5.2 79 4.1 6.6 62
Laprele Creek 8390 3.0 3.6 83 3.3 5.2 63
Reno Hill 8430 4.9 5.8 84 6.4 6.5 98
Windy Peak 7915 2.1 3.0 70 2.8 4.6 61
----- -----
Basin Index (%) 80 72
LARAMIE RIVER
Brooklyn Lake 10250 7.9 8.0 99 9.1 8.8 103
Cinnabar Park 9707 -M 8.4 * 8.5 10.6 80
Crow Creek 8335 1.6 3.8 42 3.5 5.2 67
Deadman Hill 10239 7.5 7.4 101 7.0 7.8 90
Rawah 9069 7.0 4.8 146 8.0 7.6 105
Roach 9740 6.8 6.5 105 7.9 8.6 92
Windy Peak 7915 2.1 3.0 70 2.8 4.6 61
----- -----
Basin Index (%) 98 88
S. PLATTE
Crow Creek 8335 1.6 3.8 42 3.5 5.2 67
----- -----
Basin Index (%) 42 67
LITTLE SNAKE RIVER
Battle Mountain 7498 7.3 4.1 178 10.2 6.4 159
Divide Peak 8730 8.7 7.2 121 10.8 9.8 110
Elk River 8739 10.0 6.3 159 10.2 8.4 121
Elkhead Divide 8800 11.0 -M * -M -M *
Little Snake River 8928 11.7 9.6 122 16.0 14.8 108
Old Battle 9860 12.4 11.8 105 14.4 14.0 103
Sage Creek Basin 7850 7.4 5.0 148 8.6 6.3 137
Sandstone RS 8152 8.3 4.6 180 9.9 7.6 130
Whiskey Park 9020 13.6 9.3 146 13.9 11.8 118
----- -----
Basin Index (%) 137 119
UPPER GREEN RIVER
Big Sandy Opening 9080 6.3 5.8 109 6.3 5.8 109
Blind Bull Sum 8650 9.5 9.2 103 6.4 8.3 77
East Rim Divide 7930 4.4 4.4 100 4.4 5.2 85
Elkhart Park G.S. 9400 5.2 5.6 93 4.7 6.2 76
Gros Ventre Summit 8750 5.8 6.1 95 5.6 5.9 95
Gunsight Pass 9820 5.9 5.7 104 5.8 6.8 85
Indian Creek 9425 10.1 9.6 105 8.5 9.0 94
Kendall R.S. 7740 5.0 4.9 102 5.3 6.4 83
Larsen Creek 9000 3.9 3.0 130 6.3 5.8 109
Loomis Park 8240 6.5 6.2 105 6.7 7.6 88
New Fork Lake 8340 4.8 4.4 109 -M 5.1 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.7 5.0 94 5.9 6.2 95
Spring Creek Divide 9000 9.9 9.3 106 10.1 10.0 101
Triple Peak 8500 10.4 8.7 120 10.6 10.5 101
----- -----
Basin Index (%) 105 92
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.4 3.2 200 6.5 5.7 114
Buck Pasture 9632 8.0 -M * 9.2 -M *
EF Blacks Fork GS 9360 7.5 3.9 192 5.3 5.1 104
Hams Fork 7840 5.1 4.5 113 4.7 5.1 92
Henrys Fork 10182 -M -M * 6.4 -M *
Hewinta 9500 5.0 3.3 152 7.0 6.3 111
Hickerson Park 9122 4.2 2.8 150 5.2 4.8 108
Hole-in-Rock 9168 3.1 2.9 107 4.8 4.8 100
Indian Creek 9425 10.1 9.6 105 8.5 9.0 94
Kelley R.S. 8180 7.5 6.0 125 7.7 7.8 99
Spirit Lk 10235 7.9 5.2 152 8.0 7.8 103
Steel Creek Park 10158 8.7 5.8 150 8.6 7.2 119
----- -----
Basin Index (%) 139 104
UPPER BEAR RIVER
Bear River RS 8777 5.7 3.6 158 6.7 5.2 129
Bug Lake 7987 9.4 6.4 147 8.1 8.0 101
Burts Miller Ranch 8000 4.4 2.3 191 7.1 3.5 203
Chalk Creek #1 9171 11.2 8.8 127 12.1 10.0 121
Giveout 6930 4.3 3.0 143 5.5 5.6 98
Hayden Fork 9130 7.0 5.4 130 10.1 8.8 115
Kelley R.S. 8180 7.5 6.0 125 7.7 7.8 99
Lily Lake 9133 7.1 4.8 148 7.2 7.1 101
Monte Cristo 8932 13.6 9.8 139 14.0 10.8 130
Salt River Summit 7640 6.6 4.6 143 6.6 6.7 99
Spring Creek Divide 9000 9.9 9.3 106 10.1 10.0 101
Trial Lake 9992 11.5 8.4 137 12.2 9.5 128
----- -----
Basin Index (%) 136 115
-----------------------------------------------------------------------------
-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.
