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 SATURDAY: FEBRUARY 25 , 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 13.6 14.6 93 15.2 16.6 92
Blind Bull Sum 8650 17.2 18.8 91 12.0 14.6 82
Cottonwood Creek 7670 18.0 17.0 106 18.7 19.2 97
East Rim Divide 7930 8.7 8.4 104 8.2 8.8 93
Grand Targhee 9260 33.7 32.5 104 21.1 25.4 83
Granite Creek 6770 11.9 13.9 86 10.2 15.3 67
Grassy Lake 7265 25.3 25.2 100 28.9 27.7 104
Gros Ventre Summit 8750 8.6 9.2 93 8.0 8.8 91
Gunsight Pass 9820 9.6 10.0 96 9.4 10.8 87
Lewis Lake Divide 7850 25.9 23.9 108 28.6 26.2 109
Loomis Park 8240 11.1 12.3 90 11.4 13.3 86
Phillips Bench 8200 21.2 19.8 107 21.8 21.0 104
Salt River Summit 7640 13.5 10.6 127 13.1 12.4 106
Snake River Station 6920 14.6 14.0 104 17.6 17.2 102
Somsen Ranch 6800 13.9 10.6 131 15.3 13.1 117
Spring Creek Divide 9000 18.7 19.0 98 16.3 18.9 86
Thumb Divide 7980 14.6 12.2 120 14.1 13.2 107
Togwotee Pass 9580 16.9 18.0 94 15.8 19.2 82
Triple Peak 8500 17.6 17.9 98 18.2 19.8 92
Two Ocean Plateau 9240 23.3 22.2 105 19.4 19.8 98
Willow Creek 8080 26.0 22.3 117 25.6 25.5 100
Younts Peak 8350 12.9 11.4 113 10.6 11.4 93
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Basin Index (%) 104 95
MADISON HEADWATERS IN WYOMING
Black Bear 8170 30.9 29.1 106 29.9 27.6 108
Canyon 7870 10.8 -M * 12.9 -M *
Madison Plateau 7750 20.3 17.0 119 21.0 19.2 109
West Yellowstone 6700 11.5 8.6 134 14.3 10.9 131
Whiskey Creek 6800 14.5 11.8 123 18.6 14.6 127
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Basin Index (%) 116 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.3 17.4 82 13.2 15.8 84
Canyon 7870 10.8 -M * 12.9 -M *
Evening Star 9200 20.6 21.2 97 22.3 23.2 96
Fisher Creek 9100 25.9 26.0 100 26.5 25.0 106
Monument Peak 8850 16.3 15.8 103 18.8 16.8 112
Northeast Entrance 7350 7.8 8.4 93 10.0 10.5 95
Parker Peak 9400 18.2 16.7 109 18.0 15.4 117
Sylvan Lake 8420 15.1 15.1 100 17.7 18.0 98
Thumb Divide 7980 14.6 12.2 120 14.1 13.2 107
Two Ocean Plateau 9240 23.3 22.2 105 19.4 19.8 98
White Mill 8700 19.0 18.4 103 18.1 18.2 99
Wolverine 7650 11.5 9.2 125 10.6 9.8 108
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Basin Index (%) 102 102
WIND RIVER
Burroughs Creek 8750 8.4 -M * 8.6 -M *
Castle Creek 8400 5.0 6.0 83 5.5 6.8 81
Cold Springs 9630 6.4 5.6 114 7.9 6.8 116
Deer Park 9700 16.2 10.0 162 16.7 13.0 128
Hobbs Park 10100 11.4 9.6 119 10.7 8.3 129
Kirwin 9550 7.4 7.9 94 9.4 8.8 107
Little Warm 9370 7.6 7.6 100 8.5 9.1 93
South Pass 9040 13.3 11.1 120 12.6 10.8 117
St. Lawrence Alt 8620 5.4 -M * 7.5 -M *
Togwotee Pass 9580 16.9 18.0 94 15.8 19.2 82
Townsend Creek 8700 8.8 6.4 138 9.7 7.8 124
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Basin Index (%) 113 107
BIGHORN BASIN
Bald Mtn. 9380 15.2 14.4 106 12.3 12.3 100
Bear Trap Meadow 8200 7.2 4.7 153 7.3 6.0 122
Bone Springs Div 9350 10.8 12.2 89 9.1 11.7 78
Grave Springs 8550 8.3 6.1 136 8.8 6.6 133
Kirwin 9550 7.4 7.9 94 9.4 8.8 107
Marquette 8760 6.1 5.0 122 6.8 6.6 103
Middle Powder 7760 9.4 7.4 127 8.1 6.8 119
Owl Creek 8975 5.6 4.1 137 6.2 4.5 138
Powder River Pass 9480 8.7 8.4 104 10.5 9.6 109
Shell Creek 9580 10.7 11.5 93 11.1 10.7 104
Timber Creek 7950 4.4 3.2 138 4.8 5.6 86
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Basin Index (%) 110 106
SHOSHONE RIVER
Blackwater 9780 15.5 16.9 92 15.6 16.6 94
Evening Star 9200 20.6 21.2 97 22.3 23.2 96
Marquette 8760 6.1 5.0 122 6.8 6.6 103
Sylvan Lake 8420 15.1 15.1 100 17.7 18.0 98
Sylvan Road 7120 8.8 9.3 95 12.2 13.6 90
Younts Peak 8350 12.9 11.4 113 10.6 11.4 93
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Basin Index (%) 100 95
POWDER RIVER
Bear Trap Meadow 8200 7.2 4.7 153 7.3 6.0 122
Cloud Peak Reservoir 9860 11.1 10.8 103 11.0 9.8 112
Grave Springs 8550 8.3 6.1 136 8.8 6.6 133
Hansen Sawmill 8360 6.4 5.0 128 6.6 6.0 110
Middle Powder 7760 9.4 7.4 127 8.1 6.8 119
Powder River Pass 9480 8.7 8.4 104 10.5 9.6 109
Soldier Park 8720 5.0 5.2 96 6.0 6.8 88
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Basin Index (%) 118 113
TONGUE RIVER
Big Goose 7990 8.0 5.9 136 8.7 7.6 114
Bone Springs Div 9350 10.8 12.2 89 9.1 11.7 78
Burgess Junction 7880 10.1 7.9 128 11.5 8.8 131
Dome Lake 8880 8.2 8.4 98 9.5 9.3 102
Little Goose 8870 8.7 7.4 118 9.5 9.2 103
Sucker Creek 8880 11.0 9.1 121 13.2 10.2 129
Tie Creek 6870 7.9 4.4 180 10.8 8.2 132
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Basin Index (%) 117 111
BELLE FOURCHE
Blind Park 6890 7.2 6.2 116 8.5 8.2 104
Cole Canyon 5910 -M 4.6 * 8.2 6.8 121
North Rapid Creek 6130 6.3 5.7 111 6.9 6.6 105
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Basin Index (%) 113 109
CHEYENNE RIVER BASIN
Blind Park 6890 7.2 6.2 116 8.5 8.2 104
North Rapid Creek 6130 6.3 5.7 111 6.9 6.6 105
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Basin Index (%) 113 104
UPPER N. PLATTE
Arapaho Ridge 10976 19.1 17.0 112 18.7 16.8 111
Blackhall Mtn 9839 28.0 22.0 127 27.7 21.8 127
Cinnabar Park 9707 -M 16.4 * 18.6 18.7 99
Columbine 9167 21.8 18.0 121 20.4 18.5 110
Divide Peak 8730 21.1 14.7 144 22.1 16.6 133
Joe Wright 10158 18.6 15.5 120 20.8 19.6 106
Laprele Creek 8390 10.1 6.9 146 10.5 8.2 128
Med Bow 10512 30.1 -M * 26.9 -M *
Never Summer 10323 -M 15.4 * -M 12.8 *
North French Creek 10153 23.1 21.4 108 23.0 20.0 115
Old Battle 9860 30.0 23.6 127 29.3 25.6 114
Rawah 9069 11.5 8.7 132 13.0 12.1 107
Sage Creek Basin 7850 20.1 11.3 178 16.7 10.3 162
Sand Lake 10098 21.3 20.6 103 20.6 18.0 114
South Brush Creek 8495 11.9 9.1 131 11.2 10.6 106
Tower 10620 40.0 34.2 117 37.2 31.0 120
Webber Springs 9260 21.5 16.4 131 23.2 19.4 120
Whiskey Park 9020 30.0 20.6 146 27.7 21.4 129
Willow Creek Pass 9523 13.0 10.4 125 13.2 10.5 126
Zirkel 9338 23.6 22.2 106 25.8 24.2 107
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Basin Index (%) 125 117
SWEETWATER
Deer Park 9700 16.2 10.0 162 16.7 13.0 128
Larsen Creek 9000 7.5 8.6 87 10.2 10.3 99
South Pass 9040 13.3 11.1 120 12.6 10.8 117
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Basin Index (%) 125 116
LOWER N. PLATTE
Casper Mtn. 7920 11.6 9.5 122 11.3 9.7 116
Laprele Creek 8390 10.1 6.9 146 10.5 8.2 128
Reno Hill 8430 12.6 9.6 131 14.0 10.4 135
Windy Peak 7915 9.1 5.8 157 9.8 7.3 134
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Basin Index (%) 136 128
LARAMIE RIVER
Brooklyn Lake 10250 19.1 16.0 119 19.6 16.4 120
Cinnabar Park 9707 -M 16.4 * 18.6 18.7 99
Crow Creek 8335 4.6 5.9 78 7.3 7.7 95
Deadman Hill 10239 14.6 13.0 112 13.5 13.0 104
Rawah 9069 11.5 8.7 132 13.0 12.1 107
Roach 9740 14.6 12.0 122 16.3 14.5 112
Windy Peak 7915 9.1 5.8 157 9.8 7.3 134
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Basin Index (%) 120 109
S. PLATTE
Crow Creek 8335 4.6 5.9 78 7.3 7.7 95
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Basin Index (%) 78 95
LITTLE SNAKE RIVER
Battle Mountain 7498 14.0 9.8 143 17.8 11.9 150
Divide Peak 8730 21.1 14.7 144 22.1 16.6 133
Elk River 8739 21.4 14.3 150 20.9 14.6 143
Elkhead Divide 8800 23.7 -M * 23.9 -M *
Little Snake River 8928 28.1 21.4 131 30.9 26.7 116
Old Battle 9860 30.0 23.6 127 29.3 25.6 114
Sage Creek Basin 7850 20.1 11.3 178 16.7 10.3 162
Sandstone RS 8152 18.2 10.0 182 19.7 14.0 141
Whiskey Park 9020 30.0 20.6 146 27.7 21.4 129
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Basin Index (%) 146 131
UPPER GREEN RIVER
Big Sandy Opening 9080 11.1 9.7 114 11.0 9.4 117
Blind Bull Sum 8650 17.2 18.8 91 12.0 14.6 82
East Rim Divide 7930 8.7 8.4 104 8.2 8.8 93
Elkhart Park G.S. 9400 8.8 9.3 95 8.0 9.8 82
Gros Ventre Summit 8750 8.6 9.2 93 8.0 8.8 91
Gunsight Pass 9820 9.6 10.0 96 9.4 10.8 87
Indian Creek 9425 19.3 17.6 110 16.7 15.4 108
Kendall R.S. 7740 8.6 9.6 90 9.1 10.6 86
Larsen Creek 9000 7.5 8.6 87 10.2 10.3 99
Loomis Park 8240 11.1 12.3 90 11.4 13.3 86
New Fork Lake 8340 8.2 8.2 100 -M 8.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 10.3 10.4 99 11.5 11.0 105
Spring Creek Divide 9000 18.7 19.0 98 16.3 18.9 86
Triple Peak 8500 17.6 17.9 98 18.2 19.8 92
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Basin Index (%) 98 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.5 6.4 148 10.0 9.5 105
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 11.0 8.8 125 10.3 8.6 120
Henrys Fork 10182 -M -M * 10.6 -M *
Hewinta 9500 9.0 7.5 120 11.2 10.2 110
Hickerson Park 9122 7.6 5.8 131 8.5 7.6 112
Hole-in-Rock 9168 6.2 5.4 115 8.0 7.4 108
Indian Creek 9425 19.3 17.6 110 16.7 15.4 108
Kelley R.S. 8180 14.6 11.6 126 15.3 13.1 117
Spirit Lk 10235 14.1 8.8 160 14.0 12.4 113
Steel Creek Park 10158 13.9 11.2 124 13.7 11.9 115
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Basin Index (%) 127 111
UPPER BEAR RIVER
Bear River RS 8777 9.2 7.2 128 11.0 9.0 122
Bug Lake 7987 19.5 14.6 134 15.7 14.2 111
Burts Miller Ranch 8000 6.8 5.0 136 10.6 5.7 186
Chalk Creek #1 9171 21.4 16.2 132 -M 17.1 *
Giveout 6930 10.1 7.6 133 11.0 9.6 115
Hayden Fork 9130 13.7 11.4 120 18.2 15.6 117
Kelley R.S. 8180 14.6 11.6 126 15.3 13.1 117
Lily Lake 9133 11.6 9.6 121 12.2 11.8 103
Monte Cristo 8932 25.8 19.8 130 23.2 19.4 120
Salt River Summit 7640 13.5 10.6 127 13.1 12.4 106
Spring Creek Divide 9000 18.7 19.0 98 16.3 18.9 86
Trial Lake 9992 23.7 17.2 138 22.3 17.4 128
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Basin Index (%) 126 115
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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.
