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 8 , 2023
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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 10.8 12.4 87 12.2 14.4 85
Blind Bull Sum 8650 14.5 16.0 91 10.3 12.6 82
Cottonwood Creek 7670 15.5 14.2 109 16.5 16.4 101
East Rim Divide 7930 7.6 7.0 109 7.3 7.7 95
Grand Targhee 9260 29.8 29.1 102 18.6 22.2 84
Granite Creek 6770 10.4 11.2 93 9.4 12.9 73
Grassy Lake 7265 19.7 21.4 92 23.3 24.0 97
Gros Ventre Summit 8750 7.7 8.2 94 7.6 8.0 95
Gunsight Pass 9820 8.5 8.8 97 8.4 9.4 89
Lewis Lake Divide 7850 21.5 19.8 109 23.9 22.2 108
Loomis Park 8240 9.8 10.4 94 9.9 11.0 90
Phillips Bench 8200 18.0 16.4 110 18.7 18.1 103
Salt River Summit 7640 11.5 8.2 140 11.4 10.6 108
Snake River Station 6920 12.0 12.1 99 14.5 15.8 92
Somsen Ranch 6800 11.7 8.9 131 13.4 11.4 118
Spring Creek Divide 9000 16.2 15.7 103 16.0 15.6 103
Thumb Divide 7980 12.8 10.0 128 12.4 11.6 107
Togwotee Pass 9580 14.4 15.0 96 13.8 16.6 83
Triple Peak 8500 15.0 15.2 99 15.6 16.3 96
Two Ocean Plateau 9240 19.4 20.1 97 16.0 17.2 93
Willow Creek 8080 22.7 18.4 123 22.2 21.8 102
Younts Peak 8350 10.4 9.6 108 9.2 10.0 92
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Basin Index (%) 104 95
MADISON HEADWATERS IN WYOMING
Black Bear 8170 27.0 24.4 111 26.9 23.9 113
Canyon 7870 9.3 -M * 11.4 -M *
Madison Plateau 7750 18.4 14.2 130 19.2 15.6 123
West Yellowstone 6700 10.3 7.4 139 13.0 9.7 134
Whiskey Creek 6800 13.2 9.7 136 17.3 12.7 136
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Basin Index (%) 124 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 11.0 15.6 71 10.1 14.2 71
Canyon 7870 9.3 -M * 11.4 -M *
Evening Star 9200 16.1 18.2 88 18.6 19.8 94
Fisher Creek 9100 21.8 22.4 97 22.9 22.0 104
Monument Peak 8850 13.5 13.7 99 15.7 15.2 103
Northeast Entrance 7350 6.2 6.8 91 8.5 9.0 94
Parker Peak 9400 15.1 14.6 103 15.4 14.0 110
Sylvan Lake 8420 12.5 13.2 95 15.5 15.8 98
Thumb Divide 7980 12.8 10.0 128 12.4 11.6 107
Two Ocean Plateau 9240 19.4 20.1 97 16.0 17.2 93
White Mill 8700 15.4 16.5 93 15.1 15.5 97
Wolverine 7650 7.8 8.5 92 8.5 8.6 99
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Basin Index (%) 95 97
WIND RIVER
Burroughs Creek 8750 7.0 -M * 7.4 -M *
Castle Creek 8400 4.4 4.8 92 5.0 6.2 81
Cold Springs 9630 5.6 5.2 108 6.8 6.2 110
Deer Park 9700 15.0 8.7 172 15.2 10.7 142
Hobbs Park 10100 10.3 8.4 123 9.6 7.5 128
Kirwin 9550 6.0 7.1 85 7.8 8.0 98
Little Warm 9370 6.7 6.8 99 7.6 7.8 97
South Pass 9040 11.7 8.3 141 11.6 9.6 121
St. Lawrence Alt 8620 4.8 -M * 6.5 -M *
Togwotee Pass 9580 14.4 15.0 96 13.8 16.6 83
Townsend Creek 8700 7.4 5.7 130 8.4 7.0 120
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Basin Index (%) 116 108
BIGHORN BASIN
Bald Mtn. 9380 12.4 11.8 105 10.4 10.2 102
Bear Trap Meadow 8200 6.0 4.0 150 6.5 5.4 120
Bone Springs Div 9350 8.3 10.6 78 7.5 9.6 78
Grave Springs 8550 7.3 5.1 143 7.6 5.9 129
Kirwin 9550 6.0 7.1 85 7.8 8.0 98
Marquette 8760 4.8 4.4 109 5.3 6.2 85
Middle Powder 7760 8.0 6.2 129 7.0 6.2 113
Owl Creek 8975 5.0 3.6 139 5.6 4.0 140
Powder River Pass 9480 6.8 7.2 94 8.6 8.4 102
Shell Creek 9580 8.2 9.4 87 8.8 8.9 99
Timber Creek 7950 3.6 3.2 112 4.2 5.0 84
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Basin Index (%) 105 102
SHOSHONE RIVER
Blackwater 9780 12.9 15.2 85 12.9 15.0 86
Evening Star 9200 16.1 18.2 88 18.6 19.8 94
Marquette 8760 4.8 4.4 109 5.3 6.2 85
Sylvan Lake 8420 12.5 13.2 95 15.5 15.8 98
Sylvan Road 7120 6.7 8.6 78 9.8 12.2 80
Younts Peak 8350 10.4 9.6 108 9.2 10.0 92
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Basin Index (%) 92 90
POWDER RIVER
Bear Trap Meadow 8200 6.0 4.0 150 6.5 5.4 120
Cloud Peak Reservoir 9860 9.0 9.0 100 9.0 8.6 105
Grave Springs 8550 7.3 5.1 143 7.6 5.9 129
Hansen Sawmill 8360 4.8 4.4 109 5.1 5.4 94
Middle Powder 7760 8.0 6.2 129 7.0 6.2 113
Powder River Pass 9480 6.8 7.2 94 8.6 8.4 102
Soldier Park 8720 3.3 4.4 75 4.8 6.2 77
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Basin Index (%) 112 105
TONGUE RIVER
Big Goose 7990 6.4 5.2 123 7.0 6.6 106
Bone Springs Div 9350 8.3 10.6 78 7.5 9.6 78
Burgess Junction 7880 8.3 7.0 119 10.2 7.8 131
Dome Lake 8880 5.9 7.0 84 7.8 8.1 96
Little Goose 8870 7.0 6.5 108 7.9 7.7 103
Sucker Creek 8880 9.0 7.8 115 11.2 8.6 130
Tie Creek 6870 6.3 3.5 180 9.2 7.3 126
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Basin Index (%) 108 109
BELLE FOURCHE
Blind Park 6890 5.6 5.2 108 7.0 6.6 106
Cole Canyon 5910 5.1 3.6 142 6.3 5.6 112
North Rapid Creek 6130 5.1 4.9 104 5.7 5.4 106
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Basin Index (%) 115 108
CHEYENNE RIVER BASIN
Blind Park 6890 5.6 5.2 108 7.0 6.6 106
North Rapid Creek 6130 5.1 4.9 104 5.7 5.4 106
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Basin Index (%) 106 106
UPPER N. PLATTE
Arapaho Ridge 10976 17.0 15.0 113 16.8 15.2 111
Blackhall Mtn 9839 24.6 19.5 126 24.7 20.0 124
Cinnabar Park 9707 -M 13.7 * 15.9 16.2 98
Columbine 9167 19.6 15.3 128 18.4 16.2 114
Divide Peak 8730 17.7 13.1 135 19.2 14.6 132
Joe Wright 10158 17.0 12.6 135 19.1 16.7 114
Laprele Creek 8390 8.0 5.6 143 8.2 7.4 111
Med Bow 10512 25.8 -M * 23.6 -M *
Never Summer 10323 17.7 12.8 138 12.6 11.2 112
North French Creek 10153 20.7 18.0 115 20.5 17.4 118
Old Battle 9860 25.8 20.3 127 26.6 23.2 115
Rawah 9069 10.8 7.7 140 12.1 10.8 112
Sage Creek Basin 7850 15.1 9.6 157 14.6 8.9 164
Sand Lake 10098 18.3 17.2 106 18.3 15.8 116
South Brush Creek 8495 11.1 7.7 144 10.4 9.0 116
Tower 10620 37.1 26.6 139 32.4 26.1 124
Webber Springs 9260 18.1 13.8 131 19.9 17.2 116
Whiskey Park 9020 27.2 17.4 156 25.1 18.2 138
Willow Creek Pass 9523 11.7 8.6 136 11.9 8.7 137
Zirkel 9338 20.5 19.6 105 22.7 21.4 106
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Basin Index (%) 130 119
SWEETWATER
Deer Park 9700 15.0 8.7 172 15.2 10.7 142
Larsen Creek 9000 7.1 6.2 115 9.2 8.0 115
South Pass 9040 11.7 8.3 141 11.6 9.6 121
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Basin Index (%) 146 127
LOWER N. PLATTE
Casper Mtn. 7920 9.4 8.1 116 9.4 8.8 107
Laprele Creek 8390 8.0 5.6 143 8.2 7.4 111
Reno Hill 8430 10.3 8.3 124 11.6 8.8 132
Windy Peak 7915 6.9 4.8 144 7.8 6.6 118
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Basin Index (%) 129 117
LARAMIE RIVER
Brooklyn Lake 10250 15.9 13.9 114 16.6 14.0 119
Cinnabar Park 9707 -M 13.7 * 15.9 16.2 98
Crow Creek 8335 4.1 5.5 75 6.5 6.9 94
Deadman Hill 10239 12.4 11.3 110 11.5 11.6 99
Rawah 9069 10.8 7.7 140 12.1 10.8 112
Roach 9740 12.8 10.4 123 14.3 12.4 115
Windy Peak 7915 6.9 4.8 144 7.8 6.6 118
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Basin Index (%) 117 108
S. PLATTE
Crow Creek 8335 4.1 5.5 75 6.5 6.9 94
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Basin Index (%) 75 94
LITTLE SNAKE RIVER
Battle Mountain 7498 12.8 7.8 164 16.6 10.6 157
Divide Peak 8730 17.7 13.1 135 19.2 14.6 132
Elk River 8739 19.1 11.8 162 17.9 12.8 140
Elkhead Divide 8800 21.4 -M * -M -M *
Little Snake River 8928 25.6 16.9 151 29.3 22.8 129
Old Battle 9860 25.8 20.3 127 26.6 23.2 115
Sage Creek Basin 7850 15.1 9.6 157 14.6 8.9 164
Sandstone RS 8152 16.5 8.6 192 18.0 12.0 150
Whiskey Park 9020 27.2 17.4 156 25.1 18.2 138
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Basin Index (%) 151 136
UPPER GREEN RIVER
Big Sandy Opening 9080 9.6 8.6 112 9.5 8.2 116
Blind Bull Sum 8650 14.5 16.0 91 10.3 12.6 82
East Rim Divide 7930 7.6 7.0 109 7.3 7.7 95
Elkhart Park G.S. 9400 8.1 8.2 99 7.4 8.6 86
Gros Ventre Summit 8750 7.7 8.2 94 7.6 8.0 95
Gunsight Pass 9820 8.5 8.8 97 8.4 9.4 89
Indian Creek 9425 17.6 14.8 119 15.1 13.3 114
Kendall R.S. 7740 7.5 7.9 95 7.8 9.0 87
Larsen Creek 9000 7.1 6.2 115 9.2 8.0 115
Loomis Park 8240 9.8 10.4 94 9.9 11.0 90
New Fork Lake 8340 7.2 7.0 103 -M 7.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 8.7 8.8 99 9.8 9.2 107
Spring Creek Divide 9000 16.2 15.7 103 16.0 15.6 103
Triple Peak 8500 15.0 15.2 99 15.6 16.3 96
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Basin Index (%) 102 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.9 5.4 165 9.1 8.2 111
Buck Pasture 9632 12.3 -M * 14.2 -M *
EF Blacks Fork GS 9360 9.6 7.0 137 7.4 7.0 106
Hams Fork 7840 9.9 7.6 130 9.3 7.5 124
Henrys Fork 10182 -M -M * 9.6 -M *
Hewinta 9500 8.2 5.8 141 10.2 9.0 113
Hickerson Park 9122 6.3 4.4 143 7.1 6.7 106
Hole-in-Rock 9168 5.9 4.5 131 6.9 6.7 103
Indian Creek 9425 17.6 14.8 119 15.1 13.3 114
Kelley R.S. 8180 13.0 9.6 135 13.7 11.4 120
Spirit Lk 10235 12.3 7.0 176 12.0 10.8 111
Steel Creek Park 10158 12.7 9.2 138 12.6 9.8 129
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Basin Index (%) 139 114
UPPER BEAR RIVER
Bear River RS 8777 8.2 6.2 132 9.9 7.7 129
Bug Lake 7987 17.0 12.4 137 14.0 12.2 115
Burts Miller Ranch 8000 6.7 4.2 160 9.7 5.2 187
Chalk Creek #1 9171 18.8 13.2 142 19.2 15.2 126
Giveout 6930 8.3 6.2 134 9.7 8.4 115
Hayden Fork 9130 12.5 9.0 139 16.8 12.9 130
Kelley R.S. 8180 13.0 9.6 135 13.7 11.4 120
Lily Lake 9133 11.2 7.9 142 11.1 10.0 111
Monte Cristo 8932 23.3 16.6 140 22.0 17.2 128
Salt River Summit 7640 11.5 8.2 140 11.4 10.6 108
Spring Creek Divide 9000 16.2 15.7 103 16.0 15.6 103
Trial Lake 9992 22.0 12.8 172 22.0 14.5 152
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Basin Index (%) 138 125
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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.
