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 MONDAY: FEBRUARY 20 , 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 11.5 14.0 82 13.1 15.7 83
Blind Bull Sum 8650 15.4 17.8 87 10.6 13.7 77
Cottonwood Creek 7670 16.5 16.2 102 17.5 18.6 94
East Rim Divide 7930 8.0 8.0 100 7.5 8.4 89
Grand Targhee 9260 31.4 31.8 99 19.2 24.8 77
Granite Creek 6770 10.5 13.4 78 9.7 15.2 64
Grassy Lake 7265 21.3 24.4 87 25.0 26.6 94
Gros Ventre Summit 8750 8.0 9.2 87 7.8 8.7 90
Gunsight Pass 9820 8.9 9.4 95 8.8 10.4 85
Lewis Lake Divide 7850 22.4 22.2 101 25.2 25.4 99
Loomis Park 8240 10.2 11.4 89 10.4 12.6 83
Phillips Bench 8200 19.1 19.5 98 19.6 20.2 97
Salt River Summit 7640 12.1 10.1 120 12.0 11.6 103
Snake River Station 6920 12.6 13.7 92 15.4 16.8 92
Somsen Ranch 6800 12.5 9.8 128 14.3 12.6 113
Spring Creek Divide 9000 17.1 18.0 95 16.2 18.0 90
Thumb Divide 7980 13.0 11.5 113 12.8 12.7 101
Togwotee Pass 9580 15.2 17.2 88 14.4 18.4 78
Triple Peak 8500 15.8 16.8 94 16.5 18.8 88
Two Ocean Plateau 9240 20.2 21.6 94 16.8 18.9 89
Willow Creek 8080 24.0 21.2 113 23.5 23.7 99
Younts Peak 8350 11.4 11.0 104 9.6 11.0 87
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Basin Index (%) 97 90
MADISON HEADWATERS IN WYOMING
Black Bear 8170 28.4 27.6 103 28.0 26.2 107
Canyon 7870 9.9 -M * 11.9 -M *
Madison Plateau 7750 19.1 16.2 118 20.0 17.5 114
West Yellowstone 6700 10.9 8.4 130 13.6 10.6 128
Whiskey Creek 6800 13.6 11.3 120 17.9 13.6 132
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Basin Index (%) 113 117
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 11.9 16.8 71 10.7 15.6 69
Canyon 7870 9.9 -M * 11.9 -M *
Evening Star 9200 17.6 20.3 87 20.0 21.9 91
Fisher Creek 9100 23.2 25.0 93 24.1 24.2 100
Monument Peak 8850 14.9 15.4 97 17.2 16.4 105
Northeast Entrance 7350 6.7 7.8 86 9.0 10.2 88
Parker Peak 9400 16.3 15.9 103 16.4 15.0 109
Sylvan Lake 8420 13.4 14.4 93 16.0 17.4 92
Thumb Divide 7980 13.0 11.5 113 12.8 12.7 101
Two Ocean Plateau 9240 20.2 21.6 94 16.8 18.9 89
White Mill 8700 16.4 17.8 92 16.0 17.0 94
Wolverine 7650 8.8 9.1 97 9.3 9.4 99
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Basin Index (%) 92 94
WIND RIVER
Burroughs Creek 8750 7.3 -M * 7.7 -M *
Castle Creek 8400 4.5 5.2 87 5.1 6.4 80
Cold Springs 9630 6.0 5.6 107 7.4 6.7 110
Deer Park 9700 15.1 9.6 157 15.4 12.2 126
Hobbs Park 10100 10.6 9.2 115 10.0 8.1 123
Kirwin 9550 6.4 7.6 84 8.3 8.4 99
Little Warm 9370 7.0 7.4 95 8.0 8.6 93
South Pass 9040 12.0 10.2 118 11.9 10.2 117
St. Lawrence Alt 8620 5.1 -M * 7.0 -M *
Togwotee Pass 9580 15.2 17.2 88 14.4 18.4 78
Townsend Creek 8700 7.7 6.1 126 8.7 7.6 114
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Basin Index (%) 108 103
BIGHORN BASIN
Bald Mtn. 9380 13.9 13.7 101 11.3 11.4 99
Bear Trap Meadow 8200 6.3 4.6 137 6.6 5.8 114
Bone Springs Div 9350 9.6 11.4 84 8.4 10.9 77
Grave Springs 8550 7.7 5.8 133 8.1 6.6 123
Kirwin 9550 6.4 7.6 84 8.3 8.4 99
Marquette 8760 5.7 4.8 119 6.2 6.4 97
Middle Powder 7760 8.6 7.0 123 7.4 6.7 110
Owl Creek 8975 5.2 3.9 133 5.8 4.4 132
Powder River Pass 9480 7.4 7.9 94 9.2 9.2 100
Shell Creek 9580 9.1 10.8 84 9.6 9.8 98
Timber Creek 7950 4.0 3.2 125 4.6 5.3 87
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Basin Index (%) 104 101
SHOSHONE RIVER
Blackwater 9780 13.5 16.4 82 13.8 16.0 86
Evening Star 9200 17.6 20.3 87 20.0 21.9 91
Marquette 8760 5.7 4.8 119 6.2 6.4 97
Sylvan Lake 8420 13.4 14.4 93 16.0 17.4 92
Sylvan Road 7120 7.5 9.0 83 10.6 13.3 80
Younts Peak 8350 11.4 11.0 104 9.6 11.0 87
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Basin Index (%) 91 89
POWDER RIVER
Bear Trap Meadow 8200 6.3 4.6 137 6.6 5.8 114
Cloud Peak Reservoir 9860 9.6 10.2 94 9.6 9.5 101
Grave Springs 8550 7.7 5.8 133 8.1 6.6 123
Hansen Sawmill 8360 5.1 4.8 106 5.4 5.8 93
Middle Powder 7760 8.6 7.0 123 7.4 6.7 110
Powder River Pass 9480 7.4 7.9 94 9.2 9.2 100
Soldier Park 8720 3.5 4.7 74 5.0 6.6 76
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Basin Index (%) 107 102
TONGUE RIVER
Big Goose 7990 7.1 5.8 122 7.8 7.2 108
Bone Springs Div 9350 9.6 11.4 84 8.4 10.9 77
Burgess Junction 7880 9.1 7.6 120 10.9 8.6 127
Dome Lake 8880 6.8 8.0 85 8.4 8.6 98
Little Goose 8870 7.6 6.9 110 8.6 8.6 100
Sucker Creek 8880 10.1 8.8 115 12.3 9.6 128
Tie Creek 6870 7.2 4.1 176 10.0 7.8 128
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Basin Index (%) 109 108
BELLE FOURCHE
Blind Park 6890 6.0 5.8 103 7.5 7.9 95
Cole Canyon 5910 5.5 4.2 131 6.9 6.4 108
North Rapid Creek 6130 5.5 5.4 102 6.1 6.5 94
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Basin Index (%) 110 99
CHEYENNE RIVER BASIN
Blind Park 6890 6.0 5.8 103 7.5 7.9 95
North Rapid Creek 6130 5.5 5.4 102 6.1 6.5 94
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Basin Index (%) 103 94
UPPER N. PLATTE
Arapaho Ridge 10976 17.8 16.7 107 17.6 16.6 106
Blackhall Mtn 9839 26.3 21.5 122 26.1 21.5 121
Cinnabar Park 9707 -M 16.0 * 16.6 17.8 93
Columbine 9167 21.3 17.4 122 19.8 17.8 111
Divide Peak 8730 18.6 14.2 131 20.1 16.0 126
Joe Wright 10158 17.7 14.6 121 19.9 18.6 107
Laprele Creek 8390 8.5 6.6 129 8.8 8.0 110
Med Bow 10512 27.0 -M * 24.5 -M *
Never Summer 10323 18.3 14.6 125 13.2 12.0 110
North French Creek 10153 21.0 19.8 106 20.9 18.9 111
Old Battle 9860 26.9 23.0 117 27.3 25.0 109
Rawah 9069 11.5 8.5 135 12.7 11.9 107
Sage Creek Basin 7850 17.1 11.3 151 15.1 10.1 150
Sand Lake 10098 19.7 19.0 104 19.4 17.0 114
South Brush Creek 8495 11.4 8.8 130 10.6 9.8 108
Tower 10620 38.5 31.9 121 36.3 29.4 123
Webber Springs 9260 19.2 16.0 120 21.0 18.8 112
Whiskey Park 9020 28.4 20.0 142 26.1 21.2 123
Willow Creek Pass 9523 12.1 10.0 121 12.5 10.2 123
Zirkel 9338 21.8 21.4 102 23.9 23.6 101
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Basin Index (%) 121 113
SWEETWATER
Deer Park 9700 15.1 9.6 157 15.4 12.2 126
Larsen Creek 9000 6.8 7.8 87 9.3 9.7 96
South Pass 9040 12.0 10.2 118 11.9 10.2 117
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Basin Index (%) 123 114
LOWER N. PLATTE
Casper Mtn. 7920 10.3 9.0 114 10.3 9.4 110
Laprele Creek 8390 8.5 6.6 129 8.8 8.0 110
Reno Hill 8430 11.3 9.4 120 12.6 10.2 124
Windy Peak 7915 7.2 5.6 129 8.0 7.2 111
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Basin Index (%) 122 114
LARAMIE RIVER
Brooklyn Lake 10250 16.8 15.4 109 17.6 15.7 112
Cinnabar Park 9707 -M 16.0 * 16.6 17.8 93
Crow Creek 8335 4.2 5.7 74 6.8 7.5 91
Deadman Hill 10239 13.6 12.4 110 12.6 12.4 102
Rawah 9069 11.5 8.5 135 12.7 11.9 107
Roach 9740 13.3 11.6 115 14.9 13.8 108
Windy Peak 7915 7.2 5.6 129 8.0 7.2 111
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Basin Index (%) 112 103
S. PLATTE
Crow Creek 8335 4.2 5.7 74 6.8 7.5 91
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Basin Index (%) 74 91
LITTLE SNAKE RIVER
Battle Mountain 7498 13.2 8.9 148 17.0 11.4 149
Divide Peak 8730 18.6 14.2 131 20.1 16.0 126
Elk River 8739 19.6 14.1 139 18.9 14.4 131
Elkhead Divide 8800 22.2 -M * 21.8 -M *
Little Snake River 8928 26.3 20.4 129 29.9 26.3 114
Old Battle 9860 26.9 23.0 117 27.3 25.0 109
Sage Creek Basin 7850 17.1 11.3 151 15.1 10.1 150
Sandstone RS 8152 16.8 9.9 170 18.5 13.4 138
Whiskey Park 9020 28.4 20.0 142 26.1 21.2 123
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Basin Index (%) 137 125
UPPER GREEN RIVER
Big Sandy Opening 9080 9.9 9.4 105 9.8 9.1 108
Blind Bull Sum 8650 15.4 17.8 87 10.6 13.7 77
East Rim Divide 7930 8.0 8.0 100 7.5 8.4 89
Elkhart Park G.S. 9400 8.4 9.0 93 7.5 9.4 80
Gros Ventre Summit 8750 8.0 9.2 87 7.8 8.7 90
Gunsight Pass 9820 8.9 9.4 95 8.8 10.4 85
Indian Creek 9425 18.1 16.8 108 15.6 14.6 107
Kendall R.S. 7740 7.9 9.4 84 8.3 10.3 81
Larsen Creek 9000 6.8 7.8 87 9.3 9.7 96
Loomis Park 8240 10.2 11.4 89 10.4 12.6 83
New Fork Lake 8340 7.5 8.0 94 -M 8.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 9.2 9.8 94 10.5 10.2 103
Spring Creek Divide 9000 17.1 18.0 95 16.2 18.0 90
Triple Peak 8500 15.8 16.8 94 16.5 18.8 88
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Basin Index (%) 94 90
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.0 6.2 145 9.4 9.4 100
Buck Pasture 9632 12.3 -M * 14.5 -M *
EF Blacks Fork GS 9360 9.5 8.0 119 7.4 8.0 92
Hams Fork 7840 10.2 8.5 120 9.7 8.1 120
Henrys Fork 10182 -M -M * 9.8 -M *
Hewinta 9500 7.9 6.9 114 10.6 9.9 107
Hickerson Park 9122 6.6 5.4 122 7.6 7.4 103
Hole-in-Rock 9168 5.4 5.1 106 7.2 7.1 101
Indian Creek 9425 18.1 16.8 108 15.6 14.6 107
Kelley R.S. 8180 13.4 10.8 124 14.2 12.4 115
Spirit Lk 10235 12.5 8.4 149 12.6 11.8 107
Steel Creek Park 10158 13.1 10.4 126 12.9 11.8 109
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Basin Index (%) 122 107
UPPER BEAR RIVER
Bear River RS 8777 8.3 7.0 119 10.2 8.8 116
Bug Lake 7987 17.8 14.1 126 14.7 13.8 107
Burts Miller Ranch 8000 6.1 5.0 122 9.9 5.5 180
Chalk Creek #1 9171 19.7 16.0 123 19.4 16.8 115
Giveout 6930 8.8 7.7 114 10.3 9.2 112
Hayden Fork 9130 12.5 11.2 112 17.1 15.0 114
Kelley R.S. 8180 13.4 10.8 124 14.2 12.4 115
Lily Lake 9133 10.8 9.5 114 11.3 11.5 98
Monte Cristo 8932 23.9 19.2 124 22.7 18.8 121
Salt River Summit 7640 12.1 10.1 120 12.0 11.6 103
Spring Creek Divide 9000 17.1 18.0 95 16.2 18.0 90
Trial Lake 9992 21.9 16.4 134 21.9 16.8 130
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Basin Index (%) 119 114
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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.
