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 THURSDAY: FEBRUARY 23 , 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 13.4 14.2 94 15.0 16.1 93
Blind Bull Sum 8650 16.9 18.6 91 11.7 14.4 81
Cottonwood Creek 7670 17.9 16.5 108 18.7 19.0 98
East Rim Divide 7930 8.5 8.1 105 8.0 8.4 95
Grand Targhee 9260 33.6 32.1 105 21.0 25.3 83
Granite Creek 6770 11.5 13.7 84 10.0 15.2 66
Grassy Lake 7265 24.8 24.8 100 28.2 27.2 104
Gros Ventre Summit 8750 8.3 9.2 90 7.6 8.8 86
Gunsight Pass 9820 9.5 9.8 97 9.0 10.6 85
Lewis Lake Divide 7850 25.2 23.0 110 28.2 25.6 110
Loomis Park 8240 10.9 12.0 91 11.3 12.7 89
Phillips Bench 8200 20.9 19.6 107 21.4 20.8 103
Salt River Summit 7640 13.2 10.2 129 12.7 11.9 107
Snake River Station 6920 14.3 13.8 104 17.2 17.0 101
Somsen Ranch 6800 13.8 10.3 134 14.9 12.8 116
Spring Creek Divide 9000 18.5 18.8 98 16.1 18.4 88
Thumb Divide 7980 14.3 11.8 121 13.7 13.0 105
Togwotee Pass 9580 16.7 17.7 94 15.6 18.7 83
Triple Peak 8500 17.4 17.6 99 17.7 19.5 91
Two Ocean Plateau 9240 23.1 22.0 105 19.1 19.6 97
Willow Creek 8080 25.7 21.8 118 25.3 24.9 102
Younts Peak 8350 12.3 11.1 111 10.0 11.1 90
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Basin Index (%) 104 95
MADISON HEADWATERS IN WYOMING
Black Bear 8170 30.2 28.5 106 29.4 27.4 107
Canyon 7870 10.4 -M * 12.4 -M *
Madison Plateau 7750 19.7 16.6 119 20.5 18.4 111
West Yellowstone 6700 11.2 8.6 130 14.0 10.8 130
Whiskey Creek 6800 14.0 11.5 122 17.7 14.4 123
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Basin Index (%) 115 115
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.0 17.0 82 12.8 15.8 81
Canyon 7870 10.4 -M * 12.4 -M *
Evening Star 9200 20.3 20.8 98 21.8 23.0 95
Fisher Creek 9100 25.3 25.8 98 25.7 24.6 104
Monument Peak 8850 15.8 15.7 101 18.3 16.8 109
Northeast Entrance 7350 7.5 8.2 91 9.9 10.3 96
Parker Peak 9400 17.8 16.2 110 17.6 15.4 114
Sylvan Lake 8420 14.9 14.8 101 17.0 17.8 96
Thumb Divide 7980 14.3 11.8 121 13.7 13.0 105
Two Ocean Plateau 9240 23.1 22.0 105 19.1 19.6 97
White Mill 8700 18.7 18.3 102 17.6 17.8 99
Wolverine 7650 11.0 9.2 120 10.0 9.7 103
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Basin Index (%) 102 100
WIND RIVER
Burroughs Creek 8750 8.1 -M * 8.6 -M *
Castle Creek 8400 4.8 5.9 81 5.1 6.8 75
Cold Springs 9630 6.2 5.6 111 7.6 6.7 113
Deer Park 9700 16.0 9.8 163 16.4 12.3 133
Hobbs Park 10100 11.0 9.4 117 10.3 8.2 126
Kirwin 9550 7.2 8.0 90 9.1 8.7 105
Little Warm 9370 7.4 7.6 97 8.0 9.0 89
South Pass 9040 13.2 10.2 129 12.0 10.4 115
St. Lawrence Alt 8620 5.2 -M * 7.0 -M *
Togwotee Pass 9580 16.7 17.7 94 15.6 18.7 83
Townsend Creek 8700 8.5 6.3 135 9.5 7.8 122
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Basin Index (%) 113 106
BIGHORN BASIN
Bald Mtn. 9380 14.9 14.0 106 11.6 12.1 96
Bear Trap Meadow 8200 7.0 4.6 152 6.7 6.0 112
Bone Springs Div 9350 10.3 11.8 87 8.7 11.2 78
Grave Springs 8550 8.1 6.0 135 8.6 6.6 130
Kirwin 9550 7.2 8.0 90 9.1 8.7 105
Marquette 8760 -M 4.9 * 6.3 6.5 97
Middle Powder 7760 9.0 7.4 122 7.7 6.8 113
Owl Creek 8975 5.3 4.0 132 5.6 4.4 127
Powder River Pass 9480 8.6 8.2 105 10.2 9.5 107
Shell Creek 9580 10.6 11.0 96 10.9 10.4 105
Timber Creek 7950 4.3 3.2 134 4.4 5.3 83
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Basin Index (%) 109 103
SHOSHONE RIVER
Blackwater 9780 15.0 16.7 90 15.0 16.3 92
Evening Star 9200 20.3 20.8 98 21.8 23.0 95
Marquette 8760 -M 4.9 * 6.3 6.5 97
Sylvan Lake 8420 14.9 14.8 101 17.0 17.8 96
Sylvan Road 7120 8.4 9.1 92 12.0 13.5 89
Younts Peak 8350 12.3 11.1 111 10.0 11.1 90
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Basin Index (%) 98 93
POWDER RIVER
Bear Trap Meadow 8200 7.0 4.6 152 6.7 6.0 112
Cloud Peak Reservoir 9860 -M 10.4 * 10.7 9.6 111
Grave Springs 8550 8.1 6.0 135 8.6 6.6 130
Hansen Sawmill 8360 6.1 5.0 122 6.4 5.8 110
Middle Powder 7760 9.0 7.4 122 7.7 6.8 113
Powder River Pass 9480 8.6 8.2 105 10.2 9.5 107
Soldier Park 8720 4.1 5.0 82 5.4 6.8 79
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Basin Index (%) 119 109
TONGUE RIVER
Big Goose 7990 7.5 5.8 129 8.4 7.4 114
Bone Springs Div 9350 10.3 11.8 87 8.7 11.2 78
Burgess Junction 7880 9.9 7.8 127 11.2 8.6 130
Dome Lake 8880 7.8 8.1 96 9.3 9.0 103
Little Goose 8870 8.5 7.2 118 9.2 9.0 102
Sucker Creek 8880 10.9 8.8 124 13.0 10.0 130
Tie Creek 6870 7.6 4.2 181 10.3 7.9 130
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Basin Index (%) 116 111
BELLE FOURCHE
Blind Park 6890 7.2 6.1 118 8.2 8.0 102
Cole Canyon 5910 -M 4.6 * -M 6.6 *
North Rapid Creek 6130 6.0 5.8 103 6.8 6.6 103
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Basin Index (%) 111 103
CHEYENNE RIVER BASIN
Blind Park 6890 7.2 6.1 118 8.2 8.0 102
North Rapid Creek 6130 6.0 5.8 103 6.8 6.6 103
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Basin Index (%) 111 103
UPPER N. PLATTE
Arapaho Ridge 10976 18.7 16.8 111 18.4 16.8 110
Blackhall Mtn 9839 27.4 21.7 126 27.1 21.7 125
Cinnabar Park 9707 -M 16.2 * 17.9 18.2 98
Columbine 9167 21.4 17.7 121 20.1 18.2 110
Divide Peak 8730 20.3 14.5 140 21.5 16.4 131
Joe Wright 10158 18.1 14.8 122 20.5 19.2 107
Laprele Creek 8390 9.8 6.8 144 10.2 8.2 124
Med Bow 10512 29.4 -M * 26.4 -M *
Never Summer 10323 19.2 15.0 128 13.8 12.4 111
North French Creek 10153 22.7 20.6 110 22.7 19.4 117
Old Battle 9860 29.4 23.2 127 29.1 25.4 115
Rawah 9069 11.5 8.6 134 13.0 12.1 107
Sage Creek Basin 7850 19.5 11.3 173 15.9 10.2 156
Sand Lake 10098 20.7 20.2 102 20.3 17.5 116
South Brush Creek 8495 -M 9.0 * -M 10.4 *
Tower 10620 39.4 32.5 121 36.7 30.0 122
Webber Springs 9260 21.1 16.3 129 22.8 19.1 119
Whiskey Park 9020 29.4 20.3 145 27.3 21.4 128
Willow Creek Pass 9523 12.7 10.2 125 13.0 10.2 127
Zirkel 9338 22.8 22.2 103 25.1 23.9 105
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Basin Index (%) 124 117
SWEETWATER
Deer Park 9700 16.0 9.8 163 16.4 12.3 133
Larsen Creek 9000 7.0 8.4 83 9.9 10.2 97
South Pass 9040 13.2 10.2 129 12.0 10.4 115
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Basin Index (%) 127 116
LOWER N. PLATTE
Casper Mtn. 7920 11.5 9.4 122 11.1 9.4 118
Laprele Creek 8390 9.8 6.8 144 10.2 8.2 124
Reno Hill 8430 12.2 9.5 128 13.6 10.4 131
Windy Peak 7915 -M 5.7 * -M 7.2 *
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Basin Index (%) 130 125
LARAMIE RIVER
Brooklyn Lake 10250 18.6 15.6 119 19.2 16.0 120
Cinnabar Park 9707 -M 16.2 * 17.9 18.2 98
Crow Creek 8335 4.3 5.9 73 6.9 7.7 90
Deadman Hill 10239 14.0 12.6 111 13.1 12.8 102
Rawah 9069 11.5 8.6 134 13.0 12.1 107
Roach 9740 13.9 11.8 118 15.7 14.2 111
Windy Peak 7915 -M 5.7 * -M 7.2 *
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Basin Index (%) 114 106
S. PLATTE
Crow Creek 8335 4.3 5.9 73 6.9 7.7 90
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Basin Index (%) 73 90
LITTLE SNAKE RIVER
Battle Mountain 7498 13.4 9.4 143 17.3 11.6 149
Divide Peak 8730 20.3 14.5 140 21.5 16.4 131
Elk River 8739 20.5 14.2 144 20.3 14.6 139
Elkhead Divide 8800 23.1 -M * -M -M *
Little Snake River 8928 27.6 21.2 130 30.5 26.7 114
Old Battle 9860 29.4 23.2 127 29.1 25.4 115
Sage Creek Basin 7850 19.5 11.3 173 15.9 10.2 156
Sandstone RS 8152 17.8 10.1 176 19.3 13.8 140
Whiskey Park 9020 29.4 20.3 145 27.3 21.4 128
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Basin Index (%) 143 129
UPPER GREEN RIVER
Big Sandy Opening 9080 10.7 9.5 113 10.6 9.2 115
Blind Bull Sum 8650 16.9 18.6 91 11.7 14.4 81
East Rim Divide 7930 8.5 8.1 105 8.0 8.4 95
Elkhart Park G.S. 9400 8.5 9.0 94 7.6 9.4 81
Gros Ventre Summit 8750 8.3 9.2 90 7.6 8.8 86
Gunsight Pass 9820 9.5 9.8 97 9.0 10.6 85
Indian Creek 9425 19.1 17.0 112 16.4 15.0 109
Kendall R.S. 7740 8.5 9.5 89 9.0 10.4 87
Larsen Creek 9000 7.0 8.4 83 9.9 10.2 97
Loomis Park 8240 10.9 12.0 91 11.3 12.7 89
New Fork Lake 8340 8.1 8.0 101 -M 8.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 10.0 10.1 99 11.1 10.7 104
Spring Creek Divide 9000 18.5 18.8 98 16.1 18.4 88
Triple Peak 8500 17.4 17.6 99 17.7 19.5 91
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Basin Index (%) 98 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.5 6.4 148 9.9 9.5 104
Buck Pasture 9632 13.1 -M * 15.3 -M *
EF Blacks Fork GS 9360 10.1 8.0 126 7.8 8.0 98
Hams Fork 7840 10.8 8.8 123 10.1 8.4 120
Henrys Fork 10182 -M -M * 9.9 -M *
Hewinta 9500 8.7 7.2 121 11.0 10.0 110
Hickerson Park 9122 7.4 5.6 132 8.4 7.6 111
Hole-in-Rock 9168 5.9 5.4 109 7.7 7.2 107
Indian Creek 9425 19.1 17.0 112 16.4 15.0 109
Kelley R.S. 8180 14.2 11.1 128 14.9 12.7 117
Spirit Lk 10235 13.7 8.6 159 13.7 12.3 111
Steel Creek Park 10158 13.9 11.0 126 13.6 11.9 114
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Basin Index (%) 127 111
UPPER BEAR RIVER
Bear River RS 8777 9.0 7.2 125 10.9 8.9 122
Bug Lake 7987 19.4 14.4 135 15.5 13.8 112
Burts Miller Ranch 8000 6.7 5.0 134 10.4 5.7 182
Chalk Creek #1 9171 21.1 16.2 130 19.4 17.1 113
Giveout 6930 9.9 7.6 130 10.8 9.4 115
Hayden Fork 9130 13.6 11.4 119 18.0 15.3 118
Kelley R.S. 8180 14.2 11.1 128 14.9 12.7 117
Lily Lake 9133 11.6 9.6 121 12.0 11.6 103
Monte Cristo 8932 25.5 19.6 130 23.1 19.1 121
Salt River Summit 7640 13.2 10.2 129 12.7 11.9 107
Spring Creek Divide 9000 18.5 18.8 98 16.1 18.4 88
Trial Lake 9992 23.4 16.6 141 22.1 17.0 130
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Basin Index (%) 126 116
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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.
