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 24 , 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 14.3 94 15.1 16.2 93
Blind Bull Sum 8650 17.0 18.7 91 11.9 14.6 82
Cottonwood Creek 7670 18.0 16.6 108 18.7 19.2 97
East Rim Divide 7930 8.6 8.2 105 8.1 8.5 95
Grand Targhee 9260 33.7 32.2 105 21.1 25.4 83
Granite Creek 6770 11.7 13.8 85 10.1 15.2 66
Grassy Lake 7265 24.9 24.9 100 28.4 27.4 104
Gros Ventre Summit 8750 8.5 9.2 92 7.9 8.8 90
Gunsight Pass 9820 9.6 9.8 98 9.3 10.7 87
Lewis Lake Divide 7850 25.5 23.3 109 28.3 25.8 110
Loomis Park 8240 11.1 12.2 91 11.4 13.0 88
Phillips Bench 8200 21.1 19.7 107 21.7 21.0 103
Salt River Summit 7640 13.4 10.4 129 12.9 12.2 106
Snake River Station 6920 14.3 13.8 104 17.4 17.0 102
Somsen Ranch 6800 13.9 10.4 134 15.1 12.8 118
Spring Creek Divide 9000 18.6 19.0 98 16.2 18.4 88
Thumb Divide 7980 14.5 11.8 123 13.8 13.0 106
Togwotee Pass 9580 16.8 18.0 93 15.8 18.8 84
Triple Peak 8500 17.5 17.7 99 17.9 19.6 91
Two Ocean Plateau 9240 23.2 22.1 105 19.2 19.6 98
Willow Creek 8080 25.9 22.0 118 25.5 25.0 102
Younts Peak 8350 12.6 11.2 112 10.4 11.2 93
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Basin Index (%) 104 95
MADISON HEADWATERS IN WYOMING
Black Bear 8170 30.5 29.0 105 29.7 27.6 108
Canyon 7870 10.6 -M * 12.6 -M *
Madison Plateau 7750 20.0 16.6 120 20.8 18.5 112
West Yellowstone 6700 11.3 8.6 131 14.1 10.8 131
Whiskey Creek 6800 14.3 11.6 123 18.4 14.6 126
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Basin Index (%) 116 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.0 17.1 82 13.0 15.8 82
Canyon 7870 10.6 -M * 12.6 -M *
Evening Star 9200 20.3 21.2 96 22.1 23.2 95
Fisher Creek 9100 25.5 26.0 98 26.2 24.7 106
Monument Peak 8850 16.2 15.7 103 18.6 16.8 111
Northeast Entrance 7350 7.7 8.3 93 10.0 10.4 96
Parker Peak 9400 18.0 16.4 110 17.8 15.4 116
Sylvan Lake 8420 15.0 14.8 101 17.6 18.0 98
Thumb Divide 7980 14.5 11.8 123 13.8 13.0 106
Two Ocean Plateau 9240 23.2 22.1 105 19.2 19.6 98
White Mill 8700 18.8 18.3 103 17.9 18.0 99
Wolverine 7650 11.0 9.2 120 10.3 9.7 106
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Basin Index (%) 102 101
WIND RIVER
Burroughs Creek 8750 8.3 -M * 8.6 -M *
Castle Creek 8400 4.9 5.9 83 5.4 6.8 79
Cold Springs 9630 6.4 5.6 114 7.8 6.7 116
Deer Park 9700 16.1 9.8 164 16.6 12.3 135
Hobbs Park 10100 11.2 9.4 119 10.6 8.2 129
Kirwin 9550 7.3 7.9 92 9.2 8.8 105
Little Warm 9370 7.5 7.6 99 8.3 9.0 92
South Pass 9040 13.2 10.2 129 12.4 10.7 116
St. Lawrence Alt 8620 5.4 -M * 7.4 -M *
Togwotee Pass 9580 16.8 18.0 93 15.8 18.8 84
Townsend Creek 8700 8.7 6.4 136 9.7 7.8 124
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Basin Index (%) 114 108
BIGHORN BASIN
Bald Mtn. 9380 15.0 14.2 106 12.2 12.2 100
Bear Trap Meadow 8200 7.0 4.6 152 7.1 6.0 118
Bone Springs Div 9350 10.7 12.0 89 9.0 11.5 78
Grave Springs 8550 8.2 6.1 134 8.8 6.6 133
Kirwin 9550 7.3 7.9 92 9.2 8.8 105
Marquette 8760 6.0 5.0 120 6.6 6.5 102
Middle Powder 7760 9.2 7.4 124 7.9 6.8 116
Owl Creek 8975 5.4 4.1 132 5.8 4.5 129
Powder River Pass 9480 8.7 8.3 105 10.4 9.5 109
Shell Creek 9580 10.6 11.1 95 11.0 10.6 104
Timber Creek 7950 4.3 3.2 134 4.6 5.4 85
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Basin Index (%) 110 105
SHOSHONE RIVER
Blackwater 9780 15.3 16.8 91 15.3 16.4 93
Evening Star 9200 20.3 21.2 96 22.1 23.2 95
Marquette 8760 6.0 5.0 120 6.6 6.5 102
Sylvan Lake 8420 15.0 14.8 101 17.6 18.0 98
Sylvan Road 7120 8.5 9.2 92 12.1 13.6 89
Younts Peak 8350 12.6 11.2 112 10.4 11.2 93
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Basin Index (%) 99 95
POWDER RIVER
Bear Trap Meadow 8200 7.0 4.6 152 7.1 6.0 118
Cloud Peak Reservoir 9860 11.0 10.6 104 10.9 9.6 114
Grave Springs 8550 8.2 6.1 134 8.8 6.6 133
Hansen Sawmill 8360 6.3 5.0 126 6.6 5.9 112
Middle Powder 7760 9.2 7.4 124 7.9 6.8 116
Powder River Pass 9480 8.7 8.3 105 10.4 9.5 109
Soldier Park 8720 4.6 5.0 92 5.9 6.8 87
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Basin Index (%) 117 112
TONGUE RIVER
Big Goose 7990 7.8 5.8 134 8.6 7.6 113
Bone Springs Div 9350 10.7 12.0 89 9.0 11.5 78
Burgess Junction 7880 10.0 7.8 128 11.5 8.7 132
Dome Lake 8880 8.0 8.2 98 9.4 9.1 103
Little Goose 8870 8.6 7.3 118 9.4 9.1 103
Sucker Creek 8880 10.9 9.0 121 13.2 10.0 132
Tie Creek 6870 7.6 4.4 173 10.6 8.1 131
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Basin Index (%) 117 112
BELLE FOURCHE
Blind Park 6890 7.2 6.2 116 8.3 8.0 104
Cole Canyon 5910 -M 4.6 * 7.9 6.8 116
North Rapid Creek 6130 6.0 5.8 103 6.6 6.6 100
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Basin Index (%) 110 107
CHEYENNE RIVER BASIN
Blind Park 6890 7.2 6.2 116 8.3 8.0 104
North Rapid Creek 6130 6.0 5.8 103 6.6 6.6 100
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Basin Index (%) 110 102
UPPER N. PLATTE
Arapaho Ridge 10976 18.9 17.0 111 18.6 16.8 111
Blackhall Mtn 9839 27.7 21.8 127 27.3 21.7 126
Cinnabar Park 9707 -M 16.2 * 18.0 18.7 96
Columbine 9167 21.7 17.8 122 20.3 18.2 112
Divide Peak 8730 20.7 14.6 142 21.8 16.4 133
Joe Wright 10158 18.4 15.1 122 20.6 19.3 107
Laprele Creek 8390 10.0 6.8 147 10.4 8.2 127
Med Bow 10512 29.7 -M * 26.6 -M *
Never Summer 10323 -M 15.2 * -M 12.5 *
North French Creek 10153 22.9 21.0 109 22.9 19.6 117
Old Battle 9860 29.6 23.2 128 29.2 25.4 115
Rawah 9069 11.4 8.6 133 13.0 12.1 107
Sage Creek Basin 7850 19.8 11.3 175 16.3 10.2 160
Sand Lake 10098 -M 20.5 * -M 17.7 *
South Brush Creek 8495 -M 9.1 * -M 10.4 *
Tower 10620 39.6 33.6 118 36.8 30.6 120
Webber Springs 9260 21.2 16.3 130 23.0 19.2 120
Whiskey Park 9020 29.7 20.4 146 27.5 21.4 129
Willow Creek Pass 9523 12.9 10.4 124 13.1 10.3 127
Zirkel 9338 23.2 22.1 105 25.5 24.2 105
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Basin Index (%) 126 118
SWEETWATER
Deer Park 9700 16.1 9.8 164 16.6 12.3 135
Larsen Creek 9000 7.4 8.4 88 10.1 10.3 98
South Pass 9040 13.2 10.2 129 12.4 10.7 116
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Basin Index (%) 129 117
LOWER N. PLATTE
Casper Mtn. 7920 11.5 9.4 122 11.2 9.4 119
Laprele Creek 8390 10.0 6.8 147 10.4 8.2 127
Reno Hill 8430 12.5 9.5 132 13.8 10.4 133
Windy Peak 7915 9.0 5.8 155 9.6 7.2 133
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Basin Index (%) 137 128
LARAMIE RIVER
Brooklyn Lake 10250 18.8 15.8 119 19.4 16.2 120
Cinnabar Park 9707 -M 16.2 * 18.0 18.7 96
Crow Creek 8335 4.5 5.9 76 7.1 7.7 92
Deadman Hill 10239 14.4 12.8 112 13.3 12.8 104
Rawah 9069 11.4 8.6 133 13.0 12.1 107
Roach 9740 14.2 12.0 118 15.9 14.2 112
Windy Peak 7915 9.0 5.8 155 9.6 7.2 133
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Basin Index (%) 119 108
S. PLATTE
Crow Creek 8335 4.5 5.9 76 7.1 7.7 92
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Basin Index (%) 76 92
LITTLE SNAKE RIVER
Battle Mountain 7498 13.8 9.6 144 17.6 11.8 149
Divide Peak 8730 20.7 14.6 142 21.8 16.4 133
Elk River 8739 21.0 14.2 148 20.5 14.6 140
Elkhead Divide 8800 23.4 -M * 23.4 -M *
Little Snake River 8928 27.9 21.3 131 30.8 26.7 115
Old Battle 9860 29.6 23.2 128 29.2 25.4 115
Sage Creek Basin 7850 19.8 11.3 175 16.3 10.2 160
Sandstone RS 8152 18.0 10.0 180 19.5 13.8 141
Whiskey Park 9020 29.7 20.4 146 27.5 21.4 129
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Basin Index (%) 145 131
UPPER GREEN RIVER
Big Sandy Opening 9080 11.0 9.5 116 10.9 9.2 118
Blind Bull Sum 8650 17.0 18.7 91 11.9 14.6 82
East Rim Divide 7930 8.6 8.2 105 8.1 8.5 95
Elkhart Park G.S. 9400 8.7 9.0 97 7.9 9.4 84
Gros Ventre Summit 8750 8.5 9.2 92 7.9 8.8 90
Gunsight Pass 9820 9.6 9.8 98 9.3 10.7 87
Indian Creek 9425 19.2 17.1 112 16.6 15.1 110
Kendall R.S. 7740 8.6 9.5 91 9.1 10.6 86
Larsen Creek 9000 7.4 8.4 88 10.1 10.3 98
Loomis Park 8240 11.1 12.2 91 11.4 13.0 88
New Fork Lake 8340 8.2 8.1 101 -M 8.1 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 10.1 10.1 100 11.3 10.9 104
Spring Creek Divide 9000 18.6 19.0 98 16.2 18.4 88
Triple Peak 8500 17.5 17.7 99 17.9 19.6 91
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Basin Index (%) 99 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.5 6.4 148 9.9 9.5 104
Buck Pasture 9632 13.2 -M * 15.4 -M *
EF Blacks Fork GS 9360 10.2 8.0 128 7.9 8.0 99
Hams Fork 7840 10.9 8.8 124 10.2 8.5 120
Henrys Fork 10182 -M -M * 10.7 -M *
Hewinta 9500 8.8 7.2 122 11.1 10.1 110
Hickerson Park 9122 7.5 5.7 132 8.5 7.6 112
Hole-in-Rock 9168 6.4 5.4 119 7.8 7.3 107
Indian Creek 9425 19.2 17.1 112 16.6 15.1 110
Kelley R.S. 8180 14.4 11.2 129 15.1 12.9 117
Spirit Lk 10235 13.9 8.8 158 13.9 12.3 113
Steel Creek Park 10158 13.9 11.1 125 13.7 11.9 115
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Basin Index (%) 128 111
UPPER BEAR RIVER
Bear River RS 8777 9.1 7.2 126 11.0 8.9 124
Bug Lake 7987 19.5 14.4 135 15.6 14.0 111
Burts Miller Ranch 8000 7.2 5.0 144 10.4 5.7 182
Chalk Creek #1 9171 21.3 16.2 131 20.8 17.1 122
Giveout 6930 10.0 7.6 132 10.9 9.4 116
Hayden Fork 9130 13.8 11.4 121 18.0 15.5 116
Kelley R.S. 8180 14.4 11.2 129 15.1 12.9 117
Lily Lake 9133 11.8 9.6 123 12.0 11.8 102
Monte Cristo 8932 25.8 19.7 131 23.1 19.2 120
Salt River Summit 7640 13.4 10.4 129 12.9 12.2 106
Spring Creek Divide 9000 18.6 19.0 98 16.2 18.4 88
Trial Lake 9992 23.6 16.7 141 23.0 17.0 135
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Basin Index (%) 127 117
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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.
