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 SUNDAY: FEBRUARY 19 , 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 11.2 14.0 80 12.8 15.6 82
Blind Bull Sum 8650 15.1 17.7 85 10.6 13.7 77
Cottonwood Creek 7670 16.3 16.2 101 17.0 18.5 92
East Rim Divide 7930 7.9 8.0 99 7.4 8.4 88
Grand Targhee 9260 31.0 31.8 97 18.8 24.8 76
Granite Creek 6770 10.5 13.4 78 9.5 14.9 64
Grassy Lake 7265 20.4 24.4 84 24.2 26.6 91
Gros Ventre Summit 8750 8.0 9.0 89 7.8 8.6 91
Gunsight Pass 9820 8.8 9.5 93 8.7 10.4 84
Lewis Lake Divide 7850 21.7 22.2 98 24.6 24.9 99
Loomis Park 8240 10.0 11.4 88 10.3 12.6 82
Phillips Bench 8200 18.8 19.2 98 19.5 20.1 97
Salt River Summit 7640 12.0 9.8 122 11.9 11.6 103
Snake River Station 6920 12.2 13.7 89 14.9 16.8 89
Somsen Ranch 6800 12.4 9.6 129 14.0 12.6 111
Spring Creek Divide 9000 16.8 18.0 93 16.1 18.0 89
Thumb Divide 7980 12.9 11.4 113 12.6 12.7 99
Togwotee Pass 9580 14.9 17.2 87 14.2 18.3 78
Triple Peak 8500 15.4 16.8 92 16.2 18.6 87
Two Ocean Plateau 9240 20.0 21.6 93 16.5 18.8 88
Willow Creek 8080 23.7 21.2 112 23.2 23.7 98
Younts Peak 8350 10.8 11.0 98 9.4 11.0 85
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Basin Index (%) 95 89
MADISON HEADWATERS IN WYOMING
Black Bear 8170 28.0 27.6 101 27.6 26.2 105
Canyon 7870 9.6 -M * 11.7 -M *
Madison Plateau 7750 18.7 16.0 117 19.6 17.2 114
West Yellowstone 6700 10.6 8.4 126 13.4 10.6 126
Whiskey Creek 6800 13.4 11.2 120 17.5 13.4 131
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Basin Index (%) 112 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 11.5 16.8 68 10.5 15.6 67
Canyon 7870 9.6 -M * 11.7 -M *
Evening Star 9200 17.0 20.2 84 19.6 21.6 91
Fisher Creek 9100 22.5 25.0 90 23.6 24.2 98
Monument Peak 8850 14.6 15.3 95 16.8 16.3 103
Northeast Entrance 7350 6.5 7.8 83 8.8 10.2 86
Parker Peak 9400 15.8 15.9 99 16.1 15.0 107
Sylvan Lake 8420 13.1 14.2 92 16.0 17.4 92
Thumb Divide 7980 12.9 11.4 113 12.6 12.7 99
Two Ocean Plateau 9240 20.0 21.6 93 16.5 18.8 88
White Mill 8700 16.0 17.8 90 15.6 16.7 93
Wolverine 7650 8.2 9.0 91 8.9 9.4 95
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Basin Index (%) 90 93
WIND RIVER
Burroughs Creek 8750 7.1 -M * 7.6 -M *
Castle Creek 8400 4.4 5.2 85 4.9 6.4 77
Cold Springs 9630 6.0 5.6 107 7.3 6.6 111
Deer Park 9700 15.1 9.6 157 15.3 12.1 126
Hobbs Park 10100 10.5 9.2 114 9.9 8.1 122
Kirwin 9550 6.4 7.6 84 8.1 8.4 96
Little Warm 9370 7.0 7.4 95 7.9 8.6 92
South Pass 9040 12.0 10.2 118 11.9 10.2 117
St. Lawrence Alt 8620 5.0 -M * 6.8 -M *
Togwotee Pass 9580 14.9 17.2 87 14.2 18.3 78
Townsend Creek 8700 7.7 6.0 128 8.7 7.6 114
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Basin Index (%) 108 102
BIGHORN BASIN
Bald Mtn. 9380 13.5 13.6 99 11.0 11.4 96
Bear Trap Meadow 8200 6.2 4.6 135 6.6 5.8 114
Bone Springs Div 9350 8.8 11.4 77 7.9 10.9 72
Grave Springs 8550 7.7 5.8 133 8.1 6.4 127
Kirwin 9550 6.4 7.6 84 8.1 8.4 96
Marquette 8760 5.7 4.8 119 6.2 6.4 97
Middle Powder 7760 8.5 7.0 121 7.4 6.7 110
Owl Creek 8975 5.1 3.9 131 5.6 4.4 127
Powder River Pass 9480 7.1 7.8 91 8.9 9.0 99
Shell Creek 9580 8.6 10.8 80 9.1 9.8 93
Timber Creek 7950 4.0 3.2 125 4.5 5.3 85
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Basin Index (%) 101 99
SHOSHONE RIVER
Blackwater 9780 13.4 16.5 81 13.4 15.9 84
Evening Star 9200 17.0 20.2 84 19.6 21.6 91
Marquette 8760 5.7 4.8 119 6.2 6.4 97
Sylvan Lake 8420 13.1 14.2 92 16.0 17.4 92
Sylvan Road 7120 7.2 9.0 80 10.3 13.3 77
Younts Peak 8350 10.8 11.0 98 9.4 11.0 85
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Basin Index (%) 89 88
POWDER RIVER
Bear Trap Meadow 8200 6.2 4.6 135 6.6 5.8 114
Cloud Peak Reservoir 9860 9.4 10.2 92 9.5 9.4 101
Grave Springs 8550 7.7 5.8 133 8.1 6.4 127
Hansen Sawmill 8360 5.1 4.6 111 5.3 5.6 95
Middle Powder 7760 8.5 7.0 121 7.4 6.7 110
Powder River Pass 9480 7.1 7.8 91 8.9 9.0 99
Soldier Park 8720 3.4 4.7 72 4.9 6.5 75
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Basin Index (%) 106 103
TONGUE RIVER
Big Goose 7990 7.1 5.8 122 7.7 7.2 107
Bone Springs Div 9350 8.8 11.4 77 7.9 10.9 72
Burgess Junction 7880 9.0 7.6 118 10.4 8.4 124
Dome Lake 8880 6.6 8.0 82 8.3 8.6 97
Little Goose 8870 7.6 6.8 112 8.5 8.6 99
Sucker Creek 8880 10.0 8.6 116 12.3 9.6 128
Tie Creek 6870 7.1 4.1 173 10.0 7.8 128
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Basin Index (%) 107 107
BELLE FOURCHE
Blind Park 6890 5.8 5.8 100 7.4 7.8 95
Cole Canyon 5910 5.4 4.2 129 6.7 6.4 105
North Rapid Creek 6130 5.4 5.4 100 6.0 6.4 94
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Basin Index (%) 108 98
CHEYENNE RIVER BASIN
Blind Park 6890 5.8 5.8 100 7.4 7.8 95
North Rapid Creek 6130 5.4 5.4 100 6.0 6.4 94
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Basin Index (%) 100 94
UPPER N. PLATTE
Arapaho Ridge 10976 17.6 16.6 106 17.4 16.5 105
Blackhall Mtn 9839 26.0 21.3 122 25.7 21.4 120
Cinnabar Park 9707 -M 15.9 * 16.4 17.7 93
Columbine 9167 20.7 17.4 119 19.3 17.8 108
Divide Peak 8730 18.4 14.0 131 19.8 15.6 127
Joe Wright 10158 17.7 14.6 121 19.8 18.6 106
Laprele Creek 8390 8.4 6.6 127 8.7 8.0 109
Med Bow 10512 26.4 -M * 24.0 -M *
Never Summer 10323 18.2 14.4 126 13.1 11.8 111
North French Creek 10153 20.9 19.6 107 20.8 18.8 111
Old Battle 9860 26.5 22.7 117 27.1 24.9 109
Rawah 9069 11.4 8.5 134 12.6 11.8 107
Sage Creek Basin 7850 16.9 11.3 150 14.8 9.9 149
Sand Lake 10098 19.1 18.8 102 18.9 17.0 111
South Brush Creek 8495 11.5 8.6 134 10.6 9.8 108
Tower 10620 37.9 31.4 121 35.9 29.0 124
Webber Springs 9260 18.8 15.8 119 20.7 18.7 111
Whiskey Park 9020 28.0 19.8 141 25.8 21.0 123
Willow Creek Pass 9523 12.1 10.0 121 12.4 10.0 124
Zirkel 9338 21.3 21.2 100 23.4 23.4 100
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Basin Index (%) 120 113
SWEETWATER
Deer Park 9700 15.1 9.6 157 15.3 12.1 126
Larsen Creek 9000 6.9 7.8 88 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 8.9 116 10.3 9.3 111
Laprele Creek 8390 8.4 6.6 127 8.7 8.0 109
Reno Hill 8430 11.2 9.4 119 12.6 10.0 126
Windy Peak 7915 7.0 5.6 125 8.0 7.2 111
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Basin Index (%) 121 115
LARAMIE RIVER
Brooklyn Lake 10250 16.3 15.4 106 17.1 15.6 110
Cinnabar Park 9707 -M 15.9 * 16.4 17.7 93
Crow Creek 8335 4.2 5.7 74 6.8 7.5 91
Deadman Hill 10239 13.3 12.3 108 12.4 12.3 101
Rawah 9069 11.4 8.5 134 12.6 11.8 107
Roach 9740 13.2 11.6 114 14.8 13.4 110
Windy Peak 7915 7.0 5.6 125 8.0 7.2 111
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Basin Index (%) 111 103
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 13.1 8.8 149 16.9 11.2 151
Divide Peak 8730 18.4 14.0 131 19.8 15.6 127
Elk River 8739 19.5 14.1 138 19.1 14.2 135
Elkhead Divide 8800 21.9 -M * 21.9 -M *
Little Snake River 8928 25.8 20.2 128 29.8 26.2 114
Old Battle 9860 26.5 22.7 117 27.1 24.9 109
Sage Creek Basin 7850 16.9 11.3 150 14.8 9.9 149
Sandstone RS 8152 16.6 9.8 169 18.3 13.4 137
Whiskey Park 9020 28.0 19.8 141 25.8 21.0 123
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Basin Index (%) 137 126
UPPER GREEN RIVER
Big Sandy Opening 9080 9.8 9.4 104 9.8 9.1 108
Blind Bull Sum 8650 15.1 17.7 85 10.6 13.7 77
East Rim Divide 7930 7.9 8.0 99 7.4 8.4 88
Elkhart Park G.S. 9400 8.3 8.8 94 7.5 9.4 80
Gros Ventre Summit 8750 8.0 9.0 89 7.8 8.6 91
Gunsight Pass 9820 8.8 9.5 93 8.7 10.4 84
Indian Creek 9425 17.9 16.8 107 15.5 14.6 106
Kendall R.S. 7740 7.8 9.0 87 8.2 10.1 81
Larsen Creek 9000 6.9 7.8 88 9.3 9.7 96
Loomis Park 8240 10.0 11.4 88 10.3 12.6 82
New Fork Lake 8340 7.4 7.8 95 -M 7.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 9.1 9.8 93 10.3 10.1 102
Spring Creek Divide 9000 16.8 18.0 93 16.1 18.0 89
Triple Peak 8500 15.4 16.8 92 16.2 18.6 87
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Basin Index (%) 93 90
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.0 6.2 145 9.4 9.4 100
Buck Pasture 9632 12.3 -M * 14.4 -M *
EF Blacks Fork GS 9360 9.4 8.0 118 7.3 7.8 94
Hams Fork 7840 10.0 8.5 118 9.6 8.0 120
Henrys Fork 10182 -M -M * 9.6 -M *
Hewinta 9500 7.9 6.6 120 10.5 9.8 107
Hickerson Park 9122 6.5 5.3 123 7.6 7.3 104
Hole-in-Rock 9168 5.4 5.1 106 7.1 7.0 101
Indian Creek 9425 17.9 16.8 107 15.5 14.6 106
Kelley R.S. 8180 13.2 10.7 123 14.0 12.4 113
Spirit Lk 10235 12.4 8.2 151 12.5 11.8 106
Steel Creek Park 10158 13.1 10.4 126 12.8 11.5 111
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Basin Index (%) 122 107
UPPER BEAR RIVER
Bear River RS 8777 8.3 6.9 120 10.1 8.6 117
Bug Lake 7987 17.7 14.0 126 14.4 13.8 104
Burts Miller Ranch 8000 6.0 5.0 120 9.8 5.5 178
Chalk Creek #1 9171 19.6 15.8 124 19.1 16.6 115
Giveout 6930 8.6 7.4 116 10.1 9.2 110
Hayden Fork 9130 12.4 10.9 114 17.0 14.8 115
Kelley R.S. 8180 13.2 10.7 123 14.0 12.4 113
Lily Lake 9133 10.8 9.4 115 11.3 11.2 101
Monte Cristo 8932 23.8 19.2 124 22.6 18.8 120
Salt River Summit 7640 12.0 9.8 122 11.9 11.6 103
Spring Creek Divide 9000 16.8 18.0 93 16.1 18.0 89
Trial Lake 9992 21.9 16.3 134 21.9 16.8 130
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Basin Index (%) 119 113
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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.
