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 FRIDAY: FEBRUARY 17 , 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 10.9 14.0 78 12.5 15.4 81
Blind Bull Sum 8650 14.8 17.2 86 10.5 13.3 79
Cottonwood Creek 7670 16.0 15.8 101 17.0 17.7 96
East Rim Divide 7930 7.6 7.9 96 7.3 8.2 89
Grand Targhee 9260 30.3 31.7 96 18.7 24.4 77
Granite Creek 6770 10.5 13.1 80 9.3 14.2 65
Grassy Lake 7265 19.8 23.4 85 23.7 26.2 90
Gros Ventre Summit 8750 7.7 8.8 88 7.5 8.6 87
Gunsight Pass 9820 8.7 9.4 93 8.5 10.2 83
Lewis Lake Divide 7850 21.5 21.3 101 24.2 24.6 98
Loomis Park 8240 9.9 11.4 87 10.1 12.3 82
Phillips Bench 8200 18.5 18.4 101 19.2 19.3 99
Salt River Summit 7640 11.7 9.7 121 11.5 11.4 101
Snake River Station 6920 12.1 13.6 89 14.4 16.4 88
Somsen Ranch 6800 12.2 9.6 127 13.9 12.3 113
Spring Creek Divide 9000 16.5 17.4 95 16.0 17.6 91
Thumb Divide 7980 12.8 11.2 114 12.5 12.4 101
Togwotee Pass 9580 14.8 17.0 87 14.3 18.2 79
Triple Peak 8500 15.3 16.6 92 15.8 18.4 86
Two Ocean Plateau 9240 19.7 21.2 93 16.1 18.6 87
Willow Creek 8080 23.3 21.0 111 22.8 23.5 97
Younts Peak 8350 10.5 10.9 96 9.2 11.0 84
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Basin Index (%) 95 89
MADISON HEADWATERS IN WYOMING
Black Bear 8170 27.7 27.5 101 27.4 26.0 105
Canyon 7870 9.5 -M * 11.6 -M *
Madison Plateau 7750 18.6 15.8 118 19.6 17.2 114
West Yellowstone 6700 10.5 8.0 131 13.3 10.4 128
Whiskey Creek 6800 13.3 11.1 120 17.3 13.2 131
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Basin Index (%) 112 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 11.4 16.6 69 10.4 15.2 68
Canyon 7870 9.5 -M * 11.6 -M *
Evening Star 9200 16.7 20.0 84 19.2 21.3 90
Fisher Creek 9100 22.4 24.3 92 23.3 23.7 98
Monument Peak 8850 14.3 15.0 95 16.6 16.0 104
Northeast Entrance 7350 6.4 7.6 84 8.7 10.0 87
Parker Peak 9400 15.5 15.8 98 15.8 14.8 107
Sylvan Lake 8420 12.8 13.9 92 15.6 17.0 92
Thumb Divide 7980 12.8 11.2 114 12.5 12.4 101
Two Ocean Plateau 9240 19.7 21.2 93 16.1 18.6 87
White Mill 8700 15.8 17.6 90 15.4 16.6 93
Wolverine 7650 8.0 9.0 89 8.7 9.2 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 5.5 109 7.4 6.6 112
Deer Park 9700 15.2 9.4 162 15.3 12.1 126
Hobbs Park 10100 10.6 8.8 120 9.9 8.0 124
Kirwin 9550 6.4 7.5 85 8.2 8.4 98
Little Warm 9370 6.9 7.4 93 7.8 8.6 91
South Pass 9040 12.0 10.1 119 11.8 10.2 116
St. Lawrence Alt 8620 5.0 -M * 6.7 -M *
Togwotee Pass 9580 14.8 17.0 87 14.3 18.2 79
Townsend Creek 8700 7.7 6.0 128 8.6 7.4 116
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Basin Index (%) 109 103
BIGHORN BASIN
Bald Mtn. 9380 13.3 13.4 99 10.9 11.0 99
Bear Trap Meadow 8200 6.2 4.6 135 6.6 5.7 116
Bone Springs Div 9350 8.7 11.2 78 7.8 10.7 73
Grave Springs 8550 7.6 5.7 133 8.0 6.4 125
Kirwin 9550 6.4 7.5 85 8.2 8.4 98
Marquette 8760 5.9 4.7 126 6.3 6.3 100
Middle Powder 7760 8.5 7.0 121 7.3 6.6 111
Owl Creek 8975 5.2 3.8 137 5.7 4.3 133
Powder River Pass 9480 7.0 7.8 90 8.8 9.0 98
Shell Creek 9580 8.4 10.6 79 9.0 9.7 93
Timber Creek 7950 4.0 3.2 125 4.4 5.2 85
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Basin Index (%) 102 100
SHOSHONE RIVER
Blackwater 9780 13.3 16.3 82 13.4 15.8 85
Evening Star 9200 16.7 20.0 84 19.2 21.3 90
Marquette 8760 5.9 4.7 126 6.3 6.3 100
Sylvan Lake 8420 12.8 13.9 92 15.6 17.0 92
Sylvan Road 7120 7.1 8.9 80 10.2 13.2 77
Younts Peak 8350 10.5 10.9 96 9.2 11.0 84
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Basin Index (%) 89 87
POWDER RIVER
Bear Trap Meadow 8200 6.2 4.6 135 6.6 5.7 116
Cloud Peak Reservoir 9860 9.4 9.8 96 9.5 9.2 103
Grave Springs 8550 7.6 5.7 133 8.0 6.4 125
Hansen Sawmill 8360 5.1 4.6 111 5.4 5.6 96
Middle Powder 7760 8.5 7.0 121 7.3 6.6 111
Powder River Pass 9480 7.0 7.8 90 8.8 9.0 98
Soldier Park 8720 3.6 4.5 80 5.0 6.5 77
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Basin Index (%) 108 103
TONGUE RIVER
Big Goose 7990 7.1 5.6 127 7.7 7.0 110
Bone Springs Div 9350 8.7 11.2 78 7.8 10.7 73
Burgess Junction 7880 9.0 7.6 118 11.1 8.3 134
Dome Lake 8880 6.4 7.9 81 8.3 8.5 98
Little Goose 8870 7.6 6.6 115 8.5 8.4 101
Sucker Creek 8880 10.0 8.5 118 12.2 9.6 127
Tie Creek 6870 7.1 4.0 178 10.0 7.7 130
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Basin Index (%) 109 109
BELLE FOURCHE
Blind Park 6890 5.9 5.6 105 7.2 7.6 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 6.2 97
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Basin Index (%) 110 99
CHEYENNE RIVER BASIN
Blind Park 6890 5.9 5.6 105 7.2 7.6 95
North Rapid Creek 6130 5.4 5.4 100 6.0 6.2 97
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Basin Index (%) 103 96
UPPER N. PLATTE
Arapaho Ridge 10976 17.5 16.2 108 17.4 16.4 106
Blackhall Mtn 9839 25.8 20.4 126 25.5 20.7 123
Cinnabar Park 9707 -M 15.8 * 16.2 17.3 94
Columbine 9167 20.3 16.7 122 18.9 17.4 109
Divide Peak 8730 18.3 13.8 133 19.2 15.3 125
Joe Wright 10158 17.5 14.4 122 19.8 18.2 109
Laprele Creek 8390 8.3 6.4 130 8.6 7.7 112
Med Bow 10512 26.3 -M * 23.9 -M *
Never Summer 10323 18.3 14.2 129 13.0 11.6 112
North French Creek 10153 20.6 19.5 106 20.6 18.6 111
Old Battle 9860 26.4 21.8 121 26.9 24.6 109
Rawah 9069 11.1 8.3 134 12.6 11.8 107
Sage Creek Basin 7850 16.8 10.2 165 14.8 9.8 151
Sand Lake 10098 18.9 18.5 102 18.7 16.7 112
South Brush Creek 8495 11.2 8.4 133 10.4 9.6 108
Tower 10620 37.7 30.8 122 35.7 28.4 126
Webber Springs 9260 18.7 15.4 121 20.5 18.4 111
Whiskey Park 9020 27.6 19.4 142 25.6 20.6 124
Willow Creek Pass 9523 12.0 9.7 124 12.2 9.8 124
Zirkel 9338 21.0 20.8 101 23.2 22.8 102
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Basin Index (%) 122 114
SWEETWATER
Deer Park 9700 15.2 9.4 162 15.3 12.1 126
Larsen Creek 9000 6.8 7.6 89 9.2 9.6 96
South Pass 9040 12.0 10.1 119 11.8 10.2 116
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Basin Index (%) 125 114
LOWER N. PLATTE
Casper Mtn. 7920 10.1 8.6 117 10.0 9.2 109
Laprele Creek 8390 8.3 6.4 130 8.6 7.7 112
Reno Hill 8430 10.9 9.0 121 12.3 9.6 128
Windy Peak 7915 -M 5.5 * -M 7.0 *
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Basin Index (%) 122 117
LARAMIE RIVER
Brooklyn Lake 10250 16.2 15.0 108 17.0 15.2 112
Cinnabar Park 9707 -M 15.8 * 16.2 17.3 94
Crow Creek 8335 4.2 5.8 72 6.6 7.3 90
Deadman Hill 10239 13.1 12.0 109 12.3 12.0 102
Rawah 9069 11.1 8.3 134 12.6 11.8 107
Roach 9740 13.2 11.5 115 14.7 13.2 111
Windy Peak 7915 -M 5.5 * -M 7.0 *
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Basin Index (%) 110 103
S. PLATTE
Crow Creek 8335 4.2 5.8 72 6.6 7.3 90
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Basin Index (%) 72 90
LITTLE SNAKE RIVER
Battle Mountain 7498 12.8 8.8 145 16.6 11.1 150
Divide Peak 8730 18.3 13.8 133 19.2 15.3 125
Elk River 8739 19.2 13.8 139 18.7 14.0 134
Elkhead Divide 8800 21.4 -M * -M -M *
Little Snake River 8928 25.6 20.1 127 29.4 24.3 121
Old Battle 9860 26.4 21.8 121 26.9 24.6 109
Sage Creek Basin 7850 16.8 10.2 165 14.8 9.8 151
Sandstone RS 8152 16.5 9.6 172 18.1 13.2 137
Whiskey Park 9020 27.6 19.4 142 25.6 20.6 124
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Basin Index (%) 139 127
UPPER GREEN RIVER
Big Sandy Opening 9080 9.5 9.0 106 9.5 8.8 108
Blind Bull Sum 8650 14.8 17.2 86 10.5 13.3 79
East Rim Divide 7930 7.6 7.9 96 7.3 8.2 89
Elkhart Park G.S. 9400 8.2 8.8 93 7.4 9.2 80
Gros Ventre Summit 8750 7.7 8.8 88 7.5 8.6 87
Gunsight Pass 9820 8.7 9.4 93 8.5 10.2 83
Indian Creek 9425 17.8 16.4 109 15.4 14.5 106
Kendall R.S. 7740 7.6 8.8 86 8.1 10.1 80
Larsen Creek 9000 6.8 7.6 89 9.2 9.6 96
Loomis Park 8240 9.9 11.4 87 10.1 12.3 82
New Fork Lake 8340 7.2 7.7 94 -M 7.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 8.9 9.2 97 10.1 9.8 103
Spring Creek Divide 9000 16.5 17.4 95 16.0 17.6 91
Triple Peak 8500 15.3 16.6 92 15.8 18.4 86
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Basin Index (%) 94 90
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.0 6.2 145 9.4 9.2 102
Buck Pasture 9632 12.4 -M * 14.4 -M *
EF Blacks Fork GS 9360 9.6 7.7 125 7.4 7.7 96
Hams Fork 7840 9.7 8.5 114 9.4 8.0 118
Henrys Fork 10182 -M -M * 10.0 -M *
Hewinta 9500 8.2 6.6 124 10.2 9.7 105
Hickerson Park 9122 6.6 5.2 127 7.6 7.3 104
Hole-in-Rock 9168 5.9 5.0 118 6.9 7.0 99
Indian Creek 9425 17.8 16.4 109 15.4 14.5 106
Kelley R.S. 8180 12.9 10.6 122 13.7 12.0 114
Spirit Lk 10235 12.5 8.1 154 12.3 11.7 105
Steel Creek Park 10158 13.0 10.2 127 12.8 11.4 112
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Basin Index (%) 124 107
UPPER BEAR RIVER
Bear River RS 8777 8.3 6.8 122 10.0 8.6 116
Bug Lake 7987 17.4 13.5 129 14.4 13.5 107
Burts Miller Ranch 8000 6.7 5.0 134 9.7 5.5 176
Chalk Creek #1 9171 19.5 15.4 127 19.7 16.2 122
Giveout 6930 8.2 7.2 114 9.7 9.2 105
Hayden Fork 9130 12.7 10.4 122 17.1 14.6 117
Kelley R.S. 8180 12.9 10.6 122 13.7 12.0 114
Lily Lake 9133 11.4 9.3 123 11.2 11.2 100
Monte Cristo 8932 23.7 18.2 130 22.4 18.4 122
Salt River Summit 7640 11.7 9.7 121 11.5 11.4 101
Spring Creek Divide 9000 16.5 17.4 95 16.0 17.6 91
Trial Lake 9992 22.0 15.6 141 22.0 16.3 135
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Basin Index (%) 123 115
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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.
