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 TUESDAY: FEBRUARY 21 , 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 12.1 14.1 86 13.7 15.8 87
Blind Bull Sum 8650 16.5 17.9 92 11.1 13.8 80
Cottonwood Creek 7670 16.8 16.2 104 17.8 18.6 96
East Rim Divide 7930 8.1 8.0 101 7.7 8.4 92
Grand Targhee 9260 32.7 32.0 102 20.4 25.0 82
Granite Creek 6770 10.7 13.4 80 9.8 15.2 64
Grassy Lake 7265 22.3 24.5 91 25.9 26.9 96
Gros Ventre Summit 8750 8.2 9.2 89 7.9 8.7 91
Gunsight Pass 9820 9.0 9.6 94 8.9 10.4 86
Lewis Lake Divide 7850 23.7 22.2 107 26.5 25.6 104
Loomis Park 8240 10.3 11.5 90 10.5 12.6 83
Phillips Bench 8200 19.6 19.5 101 20.2 20.4 99
Salt River Summit 7640 12.4 10.1 123 12.3 11.6 106
Snake River Station 6920 13.4 13.8 97 16.0 16.8 95
Somsen Ranch 6800 12.8 9.8 131 14.6 12.6 116
Spring Creek Divide 9000 17.5 18.0 97 16.3 18.2 90
Thumb Divide 7980 13.5 11.6 116 13.0 12.8 102
Togwotee Pass 9580 15.6 17.4 90 14.9 18.4 81
Triple Peak 8500 16.6 17.0 98 17.3 18.8 92
Two Ocean Plateau 9240 21.1 21.7 97 17.7 19.0 93
Willow Creek 8080 25.0 21.4 117 24.1 24.0 100
Younts Peak 8350 12.1 11.0 110 10.0 11.0 91
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Basin Index (%) 100 92
MADISON HEADWATERS IN WYOMING
Black Bear 8170 28.9 28.0 103 28.4 26.4 108
Canyon 7870 10.2 -M * 12.3 -M *
Madison Plateau 7750 19.5 16.2 120 20.2 17.8 113
West Yellowstone 6700 11.2 8.6 130 13.6 10.7 127
Whiskey Creek 6800 13.8 11.4 121 17.9 13.6 132
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Basin Index (%) 114 117
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 12.9 16.8 77 11.5 15.6 74
Canyon 7870 10.2 -M * 12.3 -M *
Evening Star 9200 19.0 20.4 93 21.4 22.1 97
Fisher Creek 9100 24.3 25.2 96 25.4 24.3 105
Monument Peak 8850 15.7 15.4 102 17.9 16.5 108
Northeast Entrance 7350 7.2 7.8 92 9.4 10.2 92
Parker Peak 9400 16.9 16.0 106 17.1 15.1 113
Sylvan Lake 8420 13.9 14.4 97 16.1 17.6 91
Thumb Divide 7980 13.5 11.6 116 13.0 12.8 102
Two Ocean Plateau 9240 21.1 21.7 97 17.7 19.0 93
White Mill 8700 17.7 17.8 99 17.0 17.2 99
Wolverine 7650 9.8 9.2 107 9.9 9.4 105
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Basin Index (%) 98 98
WIND RIVER
Burroughs Creek 8750 7.5 -M * 7.8 -M *
Castle Creek 8400 4.6 5.2 88 5.2 6.4 81
Cold Springs 9630 6.1 5.6 109 7.4 6.7 110
Deer Park 9700 15.0 9.7 155 15.5 12.2 127
Hobbs Park 10100 10.6 9.4 113 10.0 8.2 122
Kirwin 9550 6.6 7.6 87 8.4 8.5 99
Little Warm 9370 7.1 7.5 95 8.1 8.8 92
South Pass 9040 11.9 10.2 117 12.0 10.3 117
St. Lawrence Alt 8620 5.1 -M * 7.1 -M *
Togwotee Pass 9580 15.6 17.4 90 14.9 18.4 81
Townsend Creek 8700 7.8 6.2 126 8.7 7.7 113
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Basin Index (%) 108 103
BIGHORN BASIN
Bald Mtn. 9380 14.6 13.8 106 11.8 11.4 104
Bear Trap Meadow 8200 6.6 4.6 143 6.9 5.8 119
Bone Springs Div 9350 10.5 11.6 91 8.8 11.1 79
Grave Springs 8550 7.8 5.8 134 8.1 6.6 123
Kirwin 9550 6.6 7.6 87 8.4 8.5 99
Marquette 8760 5.6 4.8 117 6.4 6.4 100
Middle Powder 7760 8.7 7.2 121 7.6 6.7 113
Owl Creek 8975 5.2 3.9 133 5.8 4.4 132
Powder River Pass 9480 8.2 7.9 104 10.2 9.2 111
Shell Creek 9580 10.1 10.8 94 10.4 9.8 106
Timber Creek 7950 3.9 3.2 122 4.7 5.3 89
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Basin Index (%) 108 105
SHOSHONE RIVER
Blackwater 9780 14.1 16.6 85 14.5 16.0 91
Evening Star 9200 19.0 20.4 93 21.4 22.1 97
Marquette 8760 5.6 4.8 117 6.4 6.4 100
Sylvan Lake 8420 13.9 14.4 97 16.1 17.6 91
Sylvan Road 7120 7.9 9.0 88 11.0 13.4 82
Younts Peak 8350 12.1 11.0 110 10.0 11.0 91
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Basin Index (%) 95 92
POWDER RIVER
Bear Trap Meadow 8200 6.6 4.6 143 6.9 5.8 119
Cloud Peak Reservoir 9860 10.0 10.3 97 9.8 9.5 103
Grave Springs 8550 7.8 5.8 134 8.1 6.6 123
Hansen Sawmill 8360 5.4 4.8 112 5.6 5.8 97
Middle Powder 7760 8.7 7.2 121 7.6 6.7 113
Powder River Pass 9480 8.2 7.9 104 10.2 9.2 111
Soldier Park 8720 3.8 4.8 79 5.1 6.8 75
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Basin Index (%) 111 106
TONGUE RIVER
Big Goose 7990 7.3 5.8 126 7.9 7.4 107
Bone Springs Div 9350 10.5 11.6 91 8.8 11.1 79
Burgess Junction 7880 9.6 7.7 125 11.3 8.6 131
Dome Lake 8880 7.6 8.0 95 8.8 8.7 101
Little Goose 8870 7.9 7.0 113 8.8 8.8 100
Sucker Creek 8880 10.4 8.7 120 12.7 9.8 130
Tie Creek 6870 7.4 4.2 176 10.2 7.8 131
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Basin Index (%) 115 110
BELLE FOURCHE
Blind Park 6890 6.4 5.8 110 7.9 7.9 100
Cole Canyon 5910 -M 4.2 * 7.4 6.4 116
North Rapid Creek 6130 5.6 5.6 100 6.3 6.6 95
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Basin Index (%) 105 103
CHEYENNE RIVER BASIN
Blind Park 6890 6.4 5.8 110 7.9 7.9 100
North Rapid Creek 6130 5.6 5.6 100 6.3 6.6 95
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Basin Index (%) 105 98
UPPER N. PLATTE
Arapaho Ridge 10976 17.9 16.7 107 17.6 16.7 105
Blackhall Mtn 9839 26.7 21.5 124 26.3 21.6 122
Cinnabar Park 9707 -M 16.2 * 17.1 17.8 96
Columbine 9167 21.5 17.4 124 20.0 18.0 111
Divide Peak 8730 18.8 14.2 132 20.2 16.0 126
Joe Wright 10158 18.2 14.6 125 20.2 18.9 107
Laprele Creek 8390 8.6 6.6 130 8.9 8.0 111
Med Bow 10512 28.4 -M * 25.6 -M *
Never Summer 10323 18.5 14.6 127 13.5 12.2 111
North French Creek 10153 22.0 19.9 111 21.7 19.0 114
Old Battle 9860 27.1 23.0 118 27.6 25.1 110
Rawah 9069 11.5 8.5 135 12.7 11.9 107
Sage Creek Basin 7850 17.2 11.3 152 15.1 10.1 150
Sand Lake 10098 20.3 19.6 104 19.9 17.2 116
South Brush Creek 8495 11.5 8.8 131 10.7 10.0 107
Tower 10620 39.1 32.0 122 36.6 29.6 124
Webber Springs 9260 19.3 16.0 121 21.2 19.0 112
Whiskey Park 9020 28.9 20.2 143 26.3 21.2 124
Willow Creek Pass 9523 12.2 10.1 121 12.5 10.2 123
Zirkel 9338 22.3 21.6 103 24.2 23.8 102
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Basin Index (%) 122 114
SWEETWATER
Deer Park 9700 15.0 9.7 155 15.5 12.2 127
Larsen Creek 9000 6.8 7.9 86 9.4 9.7 97
South Pass 9040 11.9 10.2 117 12.0 10.3 117
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Basin Index (%) 121 115
LOWER N. PLATTE
Casper Mtn. 7920 10.4 9.0 116 10.3 9.4 110
Laprele Creek 8390 8.6 6.6 130 8.9 8.0 111
Reno Hill 8430 11.5 9.4 122 12.8 10.2 125
Windy Peak 7915 7.5 5.6 134 8.3 7.2 115
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Basin Index (%) 124 116
LARAMIE RIVER
Brooklyn Lake 10250 17.5 15.4 114 18.3 15.8 116
Cinnabar Park 9707 -M 16.2 * 17.1 17.8 96
Crow Creek 8335 4.2 5.7 74 6.8 7.7 88
Deadman Hill 10239 13.7 12.5 110 12.6 12.4 102
Rawah 9069 11.5 8.5 135 12.7 11.9 107
Roach 9740 13.5 11.6 116 15.0 13.8 109
Windy Peak 7915 7.5 5.6 134 8.3 7.2 115
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Basin Index (%) 115 105
S. PLATTE
Crow Creek 8335 4.2 5.7 74 6.8 7.7 88
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Basin Index (%) 74 88
LITTLE SNAKE RIVER
Battle Mountain 7498 13.2 8.9 148 17.0 11.6 147
Divide Peak 8730 18.8 14.2 132 20.2 16.0 126
Elk River 8739 19.8 14.2 139 18.9 14.5 130
Elkhead Divide 8800 22.4 -M * 22.0 -M *
Little Snake River 8928 26.7 21.0 127 30.0 26.4 114
Old Battle 9860 27.1 23.0 118 27.6 25.1 110
Sage Creek Basin 7850 17.2 11.3 152 15.1 10.1 150
Sandstone RS 8152 16.9 10.1 167 18.6 13.6 137
Whiskey Park 9020 28.9 20.2 143 26.3 21.2 124
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Basin Index (%) 137 125
UPPER GREEN RIVER
Big Sandy Opening 9080 10.0 9.4 106 9.9 9.2 108
Blind Bull Sum 8650 16.5 17.9 92 11.1 13.8 80
East Rim Divide 7930 8.1 8.0 101 7.7 8.4 92
Elkhart Park G.S. 9400 8.6 9.0 96 7.6 9.4 81
Gros Ventre Summit 8750 8.2 9.2 89 7.9 8.7 91
Gunsight Pass 9820 9.0 9.6 94 8.9 10.4 86
Indian Creek 9425 18.3 16.8 109 15.8 14.7 107
Kendall R.S. 7740 8.1 9.4 86 8.3 10.3 81
Larsen Creek 9000 6.8 7.9 86 9.4 9.7 97
Loomis Park 8240 10.3 11.5 90 10.5 12.6 83
New Fork Lake 8340 7.6 8.0 95 -M 8.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 9.5 9.8 97 10.8 10.2 106
Spring Creek Divide 9000 17.5 18.0 97 16.3 18.2 90
Triple Peak 8500 16.6 17.0 98 17.3 18.8 92
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Basin Index (%) 96 92
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.0 6.2 145 9.5 9.4 101
Buck Pasture 9632 12.3 -M * 14.5 -M *
EF Blacks Fork GS 9360 9.6 8.0 120 7.4 8.0 92
Hams Fork 7840 10.4 8.5 122 9.8 8.1 121
Henrys Fork 10182 -M -M * 9.8 -M *
Hewinta 9500 8.0 7.0 114 10.6 10.0 106
Hickerson Park 9122 6.6 5.5 120 7.6 7.4 103
Hole-in-Rock 9168 5.4 5.3 102 7.2 7.1 101
Indian Creek 9425 18.3 16.8 109 15.8 14.7 107
Kelley R.S. 8180 13.6 10.8 126 14.4 12.4 116
Spirit Lk 10235 12.4 8.4 148 12.5 12.0 104
Steel Creek Park 10158 13.2 10.6 125 13.0 11.8 110
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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 18.0 14.2 127 14.8 13.8 107
Burts Miller Ranch 8000 6.2 5.0 124 9.9 5.5 180
Chalk Creek #1 9171 19.8 16.0 124 19.5 17.0 115
Giveout 6930 9.0 7.6 118 10.4 9.2 113
Hayden Fork 9130 12.6 11.2 112 17.1 15.0 114
Kelley R.S. 8180 13.6 10.8 126 14.4 12.4 116
Lily Lake 9133 10.8 9.5 114 11.3 11.5 98
Monte Cristo 8932 24.1 19.4 124 22.7 19.0 119
Salt River Summit 7640 12.4 10.1 123 12.3 11.6 106
Spring Creek Divide 9000 17.5 18.0 97 16.3 18.2 90
Trial Lake 9992 22.1 16.5 134 22.0 16.8 131
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Basin Index (%) 120 114
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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.
