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 22 , 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 13.5 14.2 95 15.0 16.0 94
Blind Bull Sum 8650 17.3 17.9 97 11.6 14.1 82
Cottonwood Creek 7670 17.7 16.4 108 18.6 18.7 99
East Rim Divide 7930 8.4 8.1 104 7.9 8.4 94
Grand Targhee 9260 33.5 32.1 104 20.8 25.2 83
Granite Creek 6770 11.4 13.5 84 10.2 15.2 67
Grassy Lake 7265 24.8 24.8 100 28.2 27.1 104
Gros Ventre Summit 8750 8.6 9.2 93 8.0 8.8 91
Gunsight Pass 9820 9.5 9.6 99 9.3 10.4 89
Lewis Lake Divide 7850 25.4 22.7 112 28.2 25.6 110
Loomis Park 8240 10.8 11.7 92 11.0 12.7 87
Phillips Bench 8200 20.9 19.6 107 21.3 20.5 104
Salt River Summit 7640 13.2 10.2 129 12.8 11.8 108
Snake River Station 6920 14.5 13.8 105 17.2 16.8 102
Somsen Ranch 6800 13.4 10.2 131 15.0 12.7 118
Spring Creek Divide 9000 18.5 18.3 101 16.3 18.2 90
Thumb Divide 7980 14.4 11.6 124 13.8 12.9 107
Togwotee Pass 9580 16.4 17.4 94 15.5 18.4 84
Triple Peak 8500 17.3 17.0 102 18.0 19.3 93
Two Ocean Plateau 9240 23.1 21.8 106 19.1 19.5 98
Willow Creek 8080 26.0 21.5 121 25.0 24.4 102
Younts Peak 8350 12.5 11.0 114 10.3 11.1 93
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Basin Index (%) 105 96
MADISON HEADWATERS IN WYOMING
Black Bear 8170 30.1 28.3 106 29.5 27.0 109
Canyon 7870 10.6 -M * 12.6 -M *
Madison Plateau 7750 19.9 16.3 122 20.6 18.0 114
West Yellowstone 6700 11.3 8.6 131 13.9 10.8 129
Whiskey Creek 6800 14.1 11.6 122 18.3 14.2 129
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Basin Index (%) 116 118
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.0 16.8 83 -M 15.7 *
Canyon 7870 10.6 -M * 12.6 -M *
Evening Star 9200 20.2 20.6 98 22.1 22.8 97
Fisher Creek 9100 25.3 25.3 100 26.0 24.5 106
Monument Peak 8850 16.0 15.5 103 18.4 16.6 111
Northeast Entrance 7350 7.6 7.8 97 9.9 10.2 97
Parker Peak 9400 -M 16.0 * 17.9 15.2 118
Sylvan Lake 8420 14.8 14.6 101 17.2 17.8 97
Thumb Divide 7980 14.4 11.6 124 13.8 12.9 107
Two Ocean Plateau 9240 23.1 21.8 106 19.1 19.5 98
White Mill 8700 18.6 18.0 103 17.7 17.5 101
Wolverine 7650 10.8 9.2 117 10.3 9.6 107
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Basin Index (%) 102 103
WIND RIVER
Burroughs Creek 8750 8.2 -M * 8.4 -M *
Castle Creek 8400 4.8 5.4 89 5.4 6.6 82
Cold Springs 9630 6.2 5.6 111 7.5 6.7 112
Deer Park 9700 15.5 9.7 160 16.1 12.2 132
Hobbs Park 10100 10.9 9.4 116 10.2 8.2 124
Kirwin 9550 7.1 7.8 91 9.0 8.6 105
Little Warm 9370 7.4 7.6 97 8.4 8.8 95
South Pass 9040 12.7 10.2 125 12.0 10.4 115
St. Lawrence Alt 8620 5.1 -M * 7.1 -M *
Togwotee Pass 9580 16.4 17.4 94 15.5 18.4 84
Townsend Creek 8700 8.1 6.2 131 9.0 7.7 117
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Basin Index (%) 112 106
BIGHORN BASIN
Bald Mtn. 9380 14.9 14.0 106 12.0 11.5 104
Bear Trap Meadow 8200 6.8 4.6 148 6.9 5.9 117
Bone Springs Div 9350 10.6 11.7 91 8.8 11.2 79
Grave Springs 8550 8.0 5.9 136 8.4 6.6 127
Kirwin 9550 7.1 7.8 91 9.0 8.6 105
Marquette 8760 5.8 4.9 118 6.5 6.5 100
Middle Powder 7760 9.0 7.2 125 7.8 6.7 116
Owl Creek 8975 5.4 4.0 135 5.9 4.4 134
Powder River Pass 9480 8.5 8.2 104 10.4 9.4 111
Shell Creek 9580 10.7 10.8 99 11.0 10.0 110
Timber Creek 7950 4.2 3.2 131 4.6 5.3 87
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Basin Index (%) 111 106
SHOSHONE RIVER
Blackwater 9780 15.2 16.7 91 15.4 16.2 95
Evening Star 9200 20.2 20.6 98 22.1 22.8 97
Marquette 8760 5.8 4.9 118 6.5 6.5 100
Sylvan Lake 8420 14.8 14.6 101 17.2 17.8 97
Sylvan Road 7120 8.7 9.0 97 12.0 13.4 90
Younts Peak 8350 12.5 11.0 114 10.3 11.1 93
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Basin Index (%) 101 95
POWDER RIVER
Bear Trap Meadow 8200 6.8 4.6 148 6.9 5.9 117
Cloud Peak Reservoir 9860 10.8 10.4 104 10.6 9.6 110
Grave Springs 8550 8.0 5.9 136 8.4 6.6 127
Hansen Sawmill 8360 6.0 4.8 125 6.2 5.8 107
Middle Powder 7760 9.0 7.2 125 7.8 6.7 116
Powder River Pass 9480 8.5 8.2 104 10.4 9.4 111
Soldier Park 8720 4.3 4.9 88 5.4 6.8 79
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Basin Index (%) 116 110
TONGUE RIVER
Big Goose 7990 7.7 5.8 133 8.4 7.4 114
Bone Springs Div 9350 10.6 11.7 91 8.8 11.2 79
Burgess Junction 7880 10.0 7.8 128 11.1 8.6 129
Dome Lake 8880 8.0 7.9 101 9.3 8.8 106
Little Goose 8870 8.4 7.2 117 9.2 9.0 102
Sucker Creek 8880 10.9 8.7 125 13.1 9.9 132
Tie Creek 6870 7.6 4.2 181 10.3 7.9 130
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Basin Index (%) 119 112
BELLE FOURCHE
Blind Park 6890 6.7 5.9 114 8.0 8.0 100
Cole Canyon 5910 -M 4.4 * -M 6.5 *
North Rapid Creek 6130 5.7 5.7 100 6.2 6.6 94
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Basin Index (%) 107 97
CHEYENNE RIVER BASIN
Blind Park 6890 6.7 5.9 114 8.0 8.0 100
North Rapid Creek 6130 5.7 5.7 100 6.2 6.6 94
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Basin Index (%) 107 97
UPPER N. PLATTE
Arapaho Ridge 10976 18.3 16.7 110 17.9 16.8 107
Blackhall Mtn 9839 27.2 21.5 127 26.7 21.6 124
Cinnabar Park 9707 -M 16.2 * 17.4 17.9 97
Columbine 9167 21.9 17.5 125 20.2 18.1 112
Divide Peak 8730 20.1 14.4 140 21.3 16.2 131
Joe Wright 10158 18.4 14.7 125 20.3 19.0 107
Laprele Creek 8390 9.5 6.6 144 9.8 8.0 122
Med Bow 10512 29.0 -M * 26.1 -M *
Never Summer 10323 18.8 14.8 127 13.7 12.4 110
North French Creek 10153 22.5 20.0 112 22.2 19.0 117
Old Battle 9860 28.6 23.2 123 28.6 25.1 114
Rawah 9069 11.5 8.5 135 12.7 12.0 106
Sage Creek Basin 7850 18.4 11.3 163 15.9 10.1 157
Sand Lake 10098 20.8 20.0 104 20.3 17.2 118
South Brush Creek 8495 11.9 8.9 134 10.9 10.0 109
Tower 10620 39.4 32.1 123 36.7 29.7 124
Webber Springs 9260 20.6 16.2 127 22.4 19.0 118
Whiskey Park 9020 29.8 20.3 147 27.0 21.3 127
Willow Creek Pass 9523 12.4 10.1 123 12.7 10.2 125
Zirkel 9338 22.8 22.0 104 24.6 23.8 103
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Basin Index (%) 125 116
SWEETWATER
Deer Park 9700 15.5 9.7 160 16.1 12.2 132
Larsen Creek 9000 7.3 8.2 89 9.9 9.8 101
South Pass 9040 12.7 10.2 125 12.0 10.4 115
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Basin Index (%) 126 117
LOWER N. PLATTE
Casper Mtn. 7920 11.1 9.1 122 11.0 9.4 117
Laprele Creek 8390 9.5 6.6 144 9.8 8.0 122
Reno Hill 8430 12.0 9.4 128 13.5 10.2 132
Windy Peak 7915 8.4 5.6 150 9.1 7.2 126
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Basin Index (%) 134 125
LARAMIE RIVER
Brooklyn Lake 10250 18.1 15.5 117 18.7 15.8 118
Cinnabar Park 9707 -M 16.2 * 17.4 17.9 97
Crow Creek 8335 4.3 5.7 75 6.9 7.7 90
Deadman Hill 10239 13.9 12.6 110 12.8 12.5 102
Rawah 9069 11.5 8.5 135 12.7 12.0 106
Roach 9740 13.8 11.7 118 15.4 14.0 110
Windy Peak 7915 8.4 5.6 150 9.1 7.2 126
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Basin Index (%) 117 107
S. PLATTE
Crow Creek 8335 4.3 5.7 75 6.9 7.7 90
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Basin Index (%) 75 90
LITTLE SNAKE RIVER
Battle Mountain 7498 13.8 8.9 155 17.4 11.6 150
Divide Peak 8730 20.1 14.4 140 21.3 16.2 131
Elk River 8739 20.7 14.2 146 19.5 14.6 134
Elkhead Divide 8800 23.4 -M * 22.9 -M *
Little Snake River 8928 27.6 21.2 130 30.2 26.6 114
Old Battle 9860 28.6 23.2 123 28.6 25.1 114
Sage Creek Basin 7850 18.4 11.3 163 15.9 10.1 157
Sandstone RS 8152 18.0 10.0 180 19.3 13.7 141
Whiskey Park 9020 29.8 20.3 147 27.0 21.3 127
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Basin Index (%) 143 129
UPPER GREEN RIVER
Big Sandy Opening 9080 10.7 9.4 114 10.5 9.2 114
Blind Bull Sum 8650 17.3 17.9 97 11.6 14.1 82
East Rim Divide 7930 8.4 8.1 104 7.9 8.4 94
Elkhart Park G.S. 9400 8.8 9.0 98 7.9 9.4 84
Gros Ventre Summit 8750 8.6 9.2 93 8.0 8.8 91
Gunsight Pass 9820 9.5 9.6 99 9.3 10.4 89
Indian Creek 9425 19.2 16.8 114 16.3 14.8 110
Kendall R.S. 7740 8.7 9.5 92 8.9 10.4 86
Larsen Creek 9000 7.3 8.2 89 9.9 9.8 101
Loomis Park 8240 10.8 11.7 92 11.0 12.7 87
New Fork Lake 8340 7.9 8.0 99 -M 8.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 9.8 9.8 100 11.0 10.4 106
Spring Creek Divide 9000 18.5 18.3 101 16.3 18.2 90
Triple Peak 8500 17.3 17.0 102 18.0 19.3 93
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Basin Index (%) 100 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.3 6.2 150 9.6 9.4 102
Buck Pasture 9632 12.6 -M * 14.8 -M *
EF Blacks Fork GS 9360 10.0 8.0 125 7.5 8.0 94
Hams Fork 7840 10.8 8.5 127 9.9 8.3 119
Henrys Fork 10182 -M -M * 10.0 -M *
Hewinta 9500 8.2 7.1 115 10.8 10.0 108
Hickerson Park 9122 6.8 5.5 124 7.7 7.4 104
Hole-in-Rock 9168 5.6 5.4 104 7.4 7.2 103
Indian Creek 9425 19.2 16.8 114 16.3 14.8 110
Kelley R.S. 8180 14.3 10.9 131 15.0 12.6 119
Spirit Lk 10235 12.8 8.5 151 12.9 12.3 105
Steel Creek Park 10158 13.4 10.6 126 13.2 11.8 112
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Basin Index (%) 126 108
UPPER BEAR RIVER
Bear River RS 8777 8.7 7.0 124 10.5 8.8 119
Bug Lake 7987 19.1 14.3 134 15.8 13.8 114
Burts Miller Ranch 8000 6.6 5.0 132 10.2 5.6 182
Chalk Creek #1 9171 20.7 16.2 128 19.4 17.0 114
Giveout 6930 9.6 7.6 126 10.8 9.2 117
Hayden Fork 9130 13.2 11.3 117 17.4 15.0 116
Kelley R.S. 8180 14.3 10.9 131 15.0 12.6 119
Lily Lake 9133 11.1 9.6 116 11.6 11.5 101
Monte Cristo 8932 25.0 19.6 128 23.6 19.1 124
Salt River Summit 7640 13.2 10.2 129 12.8 11.8 108
Spring Creek Divide 9000 18.5 18.3 101 16.3 18.2 90
Trial Lake 9992 23.2 16.6 140 22.0 16.8 131
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Basin Index (%) 125 116
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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.
