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: FEBRUARY 1 , 2023
------------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
------------------------------------------------------------------------------
WYOMING
SNAKE RIVER
Base Camp 7060 10.5 11.8 89 11.9 13.6 88
Blind Bull Sum 8650 13.8 15.0 92 10.0 11.8 85
Cottonwood Creek 7670 14.7 13.5 109 15.9 15.4 103
East Rim Divide 7930 7.5 6.9 109 7.1 7.4 96
Grand Targhee 9260 28.7 27.2 106 17.6 20.6 85
Granite Creek 6770 10.2 10.4 98 9.1 12.6 72
Grassy Lake 7265 18.3 20.4 90 22.1 23.2 95
Gros Ventre Summit 8750 7.5 8.0 94 7.5 7.8 96
Gunsight Pass 9820 8.4 8.4 100 8.2 8.8 93
Lewis Lake Divide 7850 21.1 19.4 109 23.1 21.6 107
Loomis Park 8240 9.5 9.9 96 9.7 10.6 92
Phillips Bench 8200 17.1 16.0 107 17.9 17.2 104
Salt River Summit 7640 11.0 7.6 145 10.8 9.7 111
Snake River Station 6920 11.6 11.4 102 13.7 15.2 90
Somsen Ranch 6800 11.5 8.2 140 12.9 11.0 117
Spring Creek Divide 9000 15.1 15.1 100 15.8 14.9 106
Thumb Divide 7980 12.7 9.8 130 12.1 11.5 105
Togwotee Pass 9580 14.0 14.6 96 13.5 15.8 85
Triple Peak 8500 14.6 14.4 101 14.8 15.8 94
Two Ocean Plateau 9240 18.9 18.6 102 15.4 16.4 94
Willow Creek 8080 21.5 17.0 126 21.1 20.8 101
Younts Peak 8350 9.9 9.2 108 9.0 9.4 96
----- -----
Basin Index (%) 105 96
MADISON HEADWATERS IN WYOMING
Black Bear 8170 26.2 22.8 115 26.0 23.4 111
Canyon 7870 9.0 -M * 11.0 -M *
Madison Plateau 7750 18.1 13.9 130 18.7 15.4 121
West Yellowstone 6700 10.1 7.0 144 12.9 9.2 140
Whiskey Creek 6800 12.8 9.2 139 16.4 12.3 133
----- -----
Basin Index (%) 127 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 10.7 14.7 73 9.8 13.0 75
Canyon 7870 9.0 -M * 11.0 -M *
Evening Star 9200 15.5 17.5 89 17.8 18.8 95
Fisher Creek 9100 21.1 21.2 100 22.0 20.4 108
Monument Peak 8850 12.8 13.4 96 15.1 14.4 105
Northeast Entrance 7350 6.0 6.6 91 8.4 8.4 100
Parker Peak 9400 14.5 13.8 105 14.8 13.2 112
Sylvan Lake 8420 12.2 12.5 98 14.1 15.2 93
Thumb Divide 7980 12.7 9.8 130 12.1 11.5 105
Two Ocean Plateau 9240 18.9 18.6 102 15.4 16.4 94
White Mill 8700 15.0 15.9 94 14.6 15.4 95
Wolverine 7650 7.5 8.2 91 8.2 8.4 98
----- -----
Basin Index (%) 97 98
WIND RIVER
Burroughs Creek 8750 7.0 -M * 7.4 -M *
Castle Creek 8400 4.4 4.6 96 4.9 6.0 82
Cold Springs 9630 5.6 4.8 117 6.9 6.0 115
Deer Park 9700 14.9 8.0 186 15.0 10.2 147
Hobbs Park 10100 10.2 7.9 129 9.5 7.2 132
Kirwin 9550 5.9 6.8 87 7.6 7.8 97
Little Warm 9370 6.6 6.3 105 7.5 7.8 96
South Pass 9040 11.7 8.2 143 11.2 9.2 122
St. Lawrence Alt 8620 4.9 -M * 6.5 -M *
Togwotee Pass 9580 14.0 14.6 96 13.5 15.8 85
Townsend Creek 8700 7.4 5.2 142 8.4 6.6 127
----- -----
Basin Index (%) 122 110
BIGHORN BASIN
Bald Mtn. 9380 11.7 11.0 106 9.8 9.8 100
Bear Trap Meadow 8200 5.7 3.8 150 6.2 5.2 119
Bone Springs Div 9350 7.9 10.2 77 7.3 9.2 79
Grave Springs 8550 6.8 4.7 145 7.2 5.6 129
Kirwin 9550 5.9 6.8 87 7.6 7.8 97
Marquette 8760 4.9 4.2 117 5.3 5.8 91
Middle Powder 7760 7.5 6.0 125 6.6 6.0 110
Owl Creek 8975 5.0 3.2 156 5.4 3.8 142
Powder River Pass 9480 6.6 7.0 94 8.2 8.2 100
Shell Creek 9580 7.8 9.2 85 8.5 8.6 99
Timber Creek 7950 3.7 2.8 132 4.2 4.8 88
----- -----
Basin Index (%) 107 102
SHOSHONE RIVER
Blackwater 9780 12.6 14.7 86 12.5 14.1 89
Evening Star 9200 15.5 17.5 89 17.8 18.8 95
Marquette 8760 4.9 4.2 117 5.3 5.8 91
Sylvan Lake 8420 12.2 12.5 98 14.1 15.2 93
Sylvan Road 7120 6.8 8.0 85 9.7 11.8 82
Younts Peak 8350 9.9 9.2 108 9.0 9.4 96
----- -----
Basin Index (%) 94 91
POWDER RIVER
Bear Trap Meadow 8200 5.7 3.8 150 6.2 5.2 119
Cloud Peak Reservoir 9860 8.8 8.8 100 8.9 8.2 109
Grave Springs 8550 6.8 4.7 145 7.2 5.6 129
Hansen Sawmill 8360 4.8 4.2 114 5.1 5.3 96
Middle Powder 7760 7.5 6.0 125 6.6 6.0 110
Powder River Pass 9480 6.6 7.0 94 8.2 8.2 100
Soldier Park 8720 3.1 3.7 84 4.6 5.6 82
----- -----
Basin Index (%) 113 106
TONGUE RIVER
Big Goose 7990 6.3 4.8 131 7.0 6.0 117
Bone Springs Div 9350 7.9 10.2 77 7.3 9.2 79
Burgess Junction 7880 8.1 6.6 123 9.8 7.6 129
Dome Lake 8880 5.6 6.7 84 7.6 7.7 99
Little Goose 8870 6.9 5.8 119 7.8 7.2 108
Sucker Creek 8880 8.6 7.6 113 10.8 8.3 130
Tie Creek 6870 6.1 3.4 179 9.0 6.6 136
----- -----
Basin Index (%) 110 113
BELLE FOURCHE
Blind Park 6890 5.3 4.7 113 6.6 6.6 100
Cole Canyon 5910 4.5 3.2 141 -M 5.4 *
North Rapid Creek 6130 4.6 4.7 98 5.5 5.1 108
----- -----
Basin Index (%) 114 103
CHEYENNE RIVER BASIN
Blind Park 6890 5.3 4.7 113 6.6 6.6 100
North Rapid Creek 6130 4.6 4.7 98 5.5 5.1 108
----- -----
Basin Index (%) 105 103
UPPER N. PLATTE
Arapaho Ridge 10976 16.8 14.0 120 16.6 13.9 119
Blackhall Mtn 9839 23.7 18.0 132 23.8 18.9 126
Cinnabar Park 9707 -M 12.9 * 15.6 15.4 101
Columbine 9167 18.9 14.2 133 17.7 15.2 116
Divide Peak 8730 16.9 12.2 139 18.5 13.8 134
Joe Wright 10158 16.3 11.7 139 18.6 15.2 122
Laprele Creek 8390 7.7 5.4 143 8.0 6.9 116
Med Bow 10512 24.9 -M * 22.7 -M *
Never Summer 10323 17.3 11.5 150 12.0 10.6 113
North French Creek 10153 19.6 16.6 118 19.4 16.5 118
Old Battle 9860 25.1 19.0 132 25.5 22.0 116
Rawah 9069 10.4 6.8 153 11.7 9.8 119
Sage Creek Basin 7850 14.8 9.1 163 14.2 8.7 163
Sand Lake 10098 17.5 16.4 107 17.5 15.0 117
South Brush Creek 8495 10.5 7.2 146 9.9 8.6 115
Tower 10620 35.8 26.0 138 31.6 25.4 124
Webber Springs 9260 17.9 13.2 136 19.3 16.2 119
Whiskey Park 9020 26.2 16.2 162 24.3 18.0 135
Willow Creek Pass 9523 11.4 7.9 144 11.6 8.4 138
Zirkel 9338 20.0 16.8 119 22.3 19.2 116
----- -----
Basin Index (%) 135 122
SWEETWATER
Deer Park 9700 14.9 8.0 186 15.0 10.2 147
Larsen Creek 9000 6.9 5.0 138 9.1 7.8 117
South Pass 9040 11.7 8.2 143 11.2 9.2 122
----- -----
Basin Index (%) 158 130
LOWER N. PLATTE
Casper Mtn. 7920 9.1 7.6 120 9.0 8.4 107
Laprele Creek 8390 7.7 5.4 143 8.0 6.9 116
Reno Hill 8430 9.7 8.2 118 11.1 8.5 131
Windy Peak 7915 -M 4.4 * -M 6.3 *
----- -----
Basin Index (%) 125 118
LARAMIE RIVER
Brooklyn Lake 10250 15.5 12.5 124 16.2 13.2 123
Cinnabar Park 9707 -M 12.9 * 15.6 15.4 101
Crow Creek 8335 3.9 5.2 75 6.1 6.5 94
Deadman Hill 10239 11.9 10.8 110 11.1 10.6 105
Rawah 9069 10.4 6.8 153 11.7 9.8 119
Roach 9740 12.6 9.6 131 14.0 11.6 121
Windy Peak 7915 -M 4.4 * -M 6.3 *
----- -----
Basin Index (%) 121 111
S. PLATTE
Crow Creek 8335 3.9 5.2 75 6.1 6.5 94
----- -----
Basin Index (%) 75 94
LITTLE SNAKE RIVER
Battle Mountain 7498 12.3 7.4 166 16.0 10.0 160
Divide Peak 8730 16.9 12.2 139 18.5 13.8 134
Elk River 8739 18.6 11.2 166 17.4 12.0 145
Elkhead Divide 8800 20.9 -M * 21.4 -M *
Little Snake River 8928 24.6 16.2 152 28.5 22.4 127
Old Battle 9860 25.1 19.0 132 25.5 22.0 116
Sage Creek Basin 7850 14.8 9.1 163 14.2 8.7 163
Sandstone RS 8152 16.1 8.0 201 17.4 11.3 154
Whiskey Park 9020 26.2 16.2 162 24.3 18.0 135
----- -----
Basin Index (%) 156 137
UPPER GREEN RIVER
Big Sandy Opening 9080 9.4 8.1 116 9.3 8.0 116
Blind Bull Sum 8650 13.8 15.0 92 10.0 11.8 85
East Rim Divide 7930 7.5 6.9 109 7.1 7.4 96
Elkhart Park G.S. 9400 7.9 7.6 104 7.1 8.0 89
Gros Ventre Summit 8750 7.5 8.0 94 7.5 7.8 96
Gunsight Pass 9820 8.4 8.4 100 8.2 8.8 93
Indian Creek 9425 17.1 13.8 124 14.6 12.8 114
Kendall R.S. 7740 7.3 7.6 96 7.7 8.8 88
Larsen Creek 9000 6.9 5.0 138 9.1 7.8 117
Loomis Park 8240 9.5 9.9 96 9.7 10.6 92
New Fork Lake 8340 7.0 6.8 103 -M 6.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 8.3 8.1 102 9.5 8.8 108
Spring Creek Divide 9000 15.1 15.1 100 15.8 14.9 106
Triple Peak 8500 14.6 14.4 101 14.8 15.8 94
----- -----
Basin Index (%) 104 99
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.6 5.0 172 8.8 7.6 116
Buck Pasture 9632 12.0 -M * 13.8 -M *
EF Blacks Fork GS 9360 9.4 6.3 149 7.3 6.8 107
Hams Fork 7840 9.5 7.0 136 9.1 7.0 130
Henrys Fork 10182 -M -M * 9.3 -M *
Hewinta 9500 7.9 5.4 146 9.9 8.6 115
Hickerson Park 9122 6.3 4.2 150 7.1 6.4 111
Hole-in-Rock 9168 5.8 4.2 138 6.8 6.4 106
Indian Creek 9425 17.1 13.8 124 14.6 12.8 114
Kelley R.S. 8180 12.4 9.0 138 13.0 11.0 118
Spirit Lk 10235 12.0 6.5 185 11.8 10.1 117
Steel Creek Park 10158 12.3 8.7 141 12.2 9.6 127
----- -----
Basin Index (%) 145 117
UPPER BEAR RIVER
Bear River RS 8777 8.1 5.4 150 9.7 7.4 131
Bug Lake 7987 16.6 10.4 160 13.7 11.7 117
Burts Miller Ranch 8000 6.1 3.8 161 9.6 5.1 188
Chalk Creek #1 9171 18.4 12.3 150 17.8 14.9 119
Giveout 6930 7.8 6.0 130 9.2 7.6 121
Hayden Fork 9130 12.1 8.4 144 16.4 12.6 130
Kelley R.S. 8180 12.4 9.0 138 13.0 11.0 118
Lily Lake 9133 10.9 7.4 147 10.8 9.7 111
Monte Cristo 8932 23.0 14.5 159 21.5 15.8 136
Salt River Summit 7640 11.0 7.6 145 10.8 9.7 111
Spring Creek Divide 9000 15.1 15.1 100 15.8 14.9 106
Trial Lake 9992 21.2 12.7 167 21.4 14.0 153
----- -----
Basin Index (%) 144 126
-----------------------------------------------------------------------------
-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.
