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 15 , 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 11.0 13.8 80 12.6 15.2 83
Blind Bull Sum 8650 14.8 16.4 90 10.4 13.2 79
Cottonwood Creek 7670 16.0 15.3 105 16.8 17.3 97
East Rim Divide 7930 7.7 7.8 99 7.3 8.1 90
Grand Targhee 9260 30.3 30.6 99 18.6 23.8 78
Granite Creek 6770 10.5 12.7 83 9.4 14.0 67
Grassy Lake 7265 20.1 23.0 87 23.7 25.6 93
Gros Ventre Summit 8750 7.8 8.6 91 7.4 8.4 88
Gunsight Pass 9820 8.6 9.3 92 8.4 9.8 86
Lewis Lake Divide 7850 21.5 21.0 102 24.3 24.2 100
Loomis Park 8240 10.0 11.0 91 10.1 12.2 83
Phillips Bench 8200 18.5 18.1 102 19.2 19.1 101
Salt River Summit 7640 11.7 9.5 123 11.6 11.2 104
Snake River Station 6920 12.2 13.4 91 14.6 16.4 89
Somsen Ranch 6800 12.1 9.4 129 13.9 12.0 116
Spring Creek Divide 9000 16.7 16.8 99 16.0 17.4 92
Thumb Divide 7980 12.8 10.9 117 12.5 12.4 101
Togwotee Pass 9580 14.7 16.4 90 14.3 17.5 82
Triple Peak 8500 15.3 16.0 96 15.8 17.6 90
Two Ocean Plateau 9240 19.8 20.9 95 16.2 18.3 89
Willow Creek 8080 23.3 20.6 113 22.8 23.2 98
Younts Peak 8350 10.4 10.6 98 9.0 10.7 84
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Basin Index (%) 98 91
MADISON HEADWATERS IN WYOMING
Black Bear 8170 27.7 27.0 103 27.4 25.4 108
Canyon 7870 9.6 -M * 11.6 -M *
Madison Plateau 7750 18.6 15.6 119 19.5 16.9 115
West Yellowstone 6700 10.4 8.0 130 13.3 10.2 130
Whiskey Creek 6800 13.4 10.8 124 17.4 13.0 134
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Basin Index (%) 114 118
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 11.4 16.3 70 10.4 15.0 69
Canyon 7870 9.6 -M * 11.6 -M *
Evening Star 9200 16.7 20.0 84 19.1 21.1 91
Fisher Creek 9100 22.3 23.8 94 23.2 23.4 99
Monument Peak 8850 14.2 14.8 96 16.5 15.6 106
Northeast Entrance 7350 6.3 7.5 84 8.7 9.8 89
Parker Peak 9400 15.5 15.6 99 15.8 14.6 108
Sylvan Lake 8420 12.8 13.8 93 15.7 16.6 95
Thumb Divide 7980 12.8 10.9 117 12.5 12.4 101
Two Ocean Plateau 9240 19.8 20.9 95 16.2 18.3 89
White Mill 8700 15.8 17.3 91 15.4 16.4 94
Wolverine 7650 7.9 9.0 88 8.6 9.0 96
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Basin Index (%) 92 94
WIND RIVER
Burroughs Creek 8750 -M -M * 7.5 -M *
Castle Creek 8400 4.4 5.1 86 5.0 6.3 79
Cold Springs 9630 5.9 5.4 109 7.0 6.6 106
Deer Park 9700 15.1 9.2 164 15.2 11.7 130
Hobbs Park 10100 10.5 8.8 119 9.8 8.0 122
Kirwin 9550 6.3 7.4 85 8.1 8.3 98
Little Warm 9370 6.8 7.2 94 7.7 8.4 92
South Pass 9040 11.9 10.0 119 11.7 10.0 117
St. Lawrence Alt 8620 5.0 -M * 6.7 -M *
Togwotee Pass 9580 14.7 16.4 90 14.3 17.5 82
Townsend Creek 8700 7.6 5.9 129 8.6 7.4 116
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Basin Index (%) 110 104
BIGHORN BASIN
Bald Mtn. 9380 13.2 13.1 101 10.6 10.9 97
Bear Trap Meadow 8200 5.9 4.4 134 6.2 5.6 111
Bone Springs Div 9350 -M 11.0 * 7.5 10.4 72
Grave Springs 8550 7.5 5.4 139 8.0 6.4 125
Kirwin 9550 6.3 7.4 85 8.1 8.3 98
Marquette 8760 5.8 4.7 123 6.0 6.3 95
Middle Powder 7760 8.4 6.8 124 7.2 6.4 112
Owl Creek 8975 5.0 3.8 132 5.6 4.3 130
Powder River Pass 9480 7.0 7.5 93 8.7 8.8 99
Shell Creek 9580 8.3 10.4 80 8.9 9.4 95
Timber Creek 7950 3.9 3.2 122 4.3 5.2 83
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Basin Index (%) 107 99
SHOSHONE RIVER
Blackwater 9780 13.1 16.0 82 13.0 15.6 83
Evening Star 9200 16.7 20.0 84 19.1 21.1 91
Marquette 8760 5.8 4.7 123 6.0 6.3 95
Sylvan Lake 8420 12.8 13.8 93 15.7 16.6 95
Sylvan Road 7120 7.1 8.8 81 10.1 12.9 78
Younts Peak 8350 10.4 10.6 98 9.0 10.7 84
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Basin Index (%) 89 88
POWDER RIVER
Bear Trap Meadow 8200 5.9 4.4 134 6.2 5.6 111
Cloud Peak Reservoir 9860 9.4 9.6 98 9.4 9.0 104
Grave Springs 8550 7.5 5.4 139 8.0 6.4 125
Hansen Sawmill 8360 5.0 4.6 109 5.2 5.6 93
Middle Powder 7760 8.4 6.8 124 7.2 6.4 112
Powder River Pass 9480 7.0 7.5 93 8.7 8.8 99
Soldier Park 8720 3.3 4.4 75 4.7 6.4 73
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Basin Index (%) 109 102
TONGUE RIVER
Big Goose 7990 6.9 5.4 128 7.6 7.0 109
Bone Springs Div 9350 -M 11.0 * 7.5 10.4 72
Burgess Junction 7880 9.0 7.4 122 10.2 8.2 124
Dome Lake 8880 6.2 7.7 81 8.0 8.4 95
Little Goose 8870 7.5 6.6 114 8.4 8.1 104
Sucker Creek 8880 9.9 8.3 119 12.1 9.2 132
Tie Creek 6870 7.0 3.7 189 9.8 7.5 131
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Basin Index (%) 119 108
BELLE FOURCHE
Blind Park 6890 5.8 5.5 105 7.2 7.3 99
Cole Canyon 5910 5.3 4.0 132 6.3 5.7 111
North Rapid Creek 6130 5.3 5.1 104 5.9 6.1 97
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Basin Index (%) 112 102
CHEYENNE RIVER BASIN
Blind Park 6890 5.8 5.5 105 7.2 7.3 99
North Rapid Creek 6130 5.3 5.1 104 5.9 6.1 97
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Basin Index (%) 105 98
UPPER N. PLATTE
Arapaho Ridge 10976 17.6 15.9 111 17.4 15.9 109
Blackhall Mtn 9839 25.6 20.0 128 25.5 20.3 126
Cinnabar Park 9707 -M 15.0 * 16.1 17.0 95
Columbine 9167 20.5 16.2 127 19.1 17.1 112
Divide Peak 8730 17.9 13.8 130 19.2 15.0 128
Joe Wright 10158 17.4 14.0 124 19.6 17.7 111
Laprele Creek 8390 8.3 6.2 134 8.6 7.7 112
Med Bow 10512 26.2 -M * 23.8 -M *
Never Summer 10323 18.2 14.0 130 13.1 11.5 114
North French Creek 10153 20.8 19.2 108 20.7 18.5 112
Old Battle 9860 26.2 21.8 120 26.9 24.2 111
Rawah 9069 11.2 8.2 137 12.5 11.5 109
Sage Creek Basin 7850 15.2 9.9 154 14.7 9.6 153
Sand Lake 10098 18.6 18.0 103 18.5 16.6 111
South Brush Creek 8495 11.4 8.2 139 10.5 9.3 113
Tower 10620 37.8 30.6 124 35.8 28.2 127
Webber Springs 9260 18.5 15.0 123 20.4 17.9 114
Whiskey Park 9020 27.9 19.1 146 25.7 20.0 128
Willow Creek Pass 9523 12.0 9.5 126 12.3 9.4 131
Zirkel 9338 21.0 20.8 101 -M 22.5 *
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Basin Index (%) 123 117
SWEETWATER
Deer Park 9700 15.1 9.2 164 15.2 11.7 130
Larsen Creek 9000 6.8 7.4 92 9.1 9.6 95
South Pass 9040 11.9 10.0 119 11.7 10.0 117
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Basin Index (%) 127 115
LOWER N. PLATTE
Casper Mtn. 7920 10.1 8.6 117 10.0 9.0 111
Laprele Creek 8390 8.3 6.2 134 8.6 7.7 112
Reno Hill 8430 10.9 8.8 124 12.3 9.4 131
Windy Peak 7915 6.8 5.3 128 7.8 6.8 115
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Basin Index (%) 125 118
LARAMIE RIVER
Brooklyn Lake 10250 16.1 14.8 109 16.8 14.7 114
Cinnabar Park 9707 -M 15.0 * 16.1 17.0 95
Crow Creek 8335 4.0 5.8 69 6.5 7.2 90
Deadman Hill 10239 13.1 11.8 111 12.3 12.0 102
Rawah 9069 11.2 8.2 137 12.5 11.5 109
Roach 9740 13.0 11.2 116 14.7 13.0 113
Windy Peak 7915 6.8 5.3 128 7.8 6.8 115
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Basin Index (%) 112 105
S. PLATTE
Crow Creek 8335 4.0 5.8 69 6.5 7.2 90
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Basin Index (%) 69 90
LITTLE SNAKE RIVER
Battle Mountain 7498 13.0 8.8 148 16.8 11.1 151
Divide Peak 8730 17.9 13.8 130 19.2 15.0 128
Elk River 8739 19.6 13.7 143 18.9 13.7 138
Elkhead Divide 8800 21.8 -M * -M -M *
Little Snake River 8928 25.9 19.6 132 29.8 24.0 124
Old Battle 9860 26.2 21.8 120 26.9 24.2 111
Sage Creek Basin 7850 15.2 9.9 154 14.7 9.6 153
Sandstone RS 8152 16.7 9.6 174 18.3 13.0 141
Whiskey Park 9020 27.9 19.1 146 25.7 20.0 128
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Basin Index (%) 140 130
UPPER GREEN RIVER
Big Sandy Opening 9080 9.6 9.0 107 9.5 8.5 112
Blind Bull Sum 8650 14.8 16.4 90 10.4 13.2 79
East Rim Divide 7930 7.7 7.8 99 7.3 8.1 90
Elkhart Park G.S. 9400 8.2 8.6 95 7.4 9.0 82
Gros Ventre Summit 8750 7.8 8.6 91 7.4 8.4 88
Gunsight Pass 9820 8.6 9.3 92 8.4 9.8 86
Indian Creek 9425 17.8 16.3 109 15.3 14.2 108
Kendall R.S. 7740 7.6 8.6 88 8.1 10.0 81
Larsen Creek 9000 6.8 7.4 92 9.1 9.6 95
Loomis Park 8240 10.0 11.0 91 10.1 12.2 83
New Fork Lake 8340 7.2 7.6 95 -M 7.5 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 9.0 9.0 100 10.1 9.6 105
Spring Creek Divide 9000 16.7 16.8 99 16.0 17.4 92
Triple Peak 8500 15.3 16.0 96 15.8 17.6 90
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Basin Index (%) 97 91
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.8 5.9 149 9.3 9.0 103
Buck Pasture 9632 12.3 -M * 14.4 -M *
EF Blacks Fork GS 9360 9.6 7.4 130 7.3 7.6 96
Hams Fork 7840 9.9 8.3 119 9.4 7.8 121
Henrys Fork 10182 -M -M * 9.9 -M *
Hewinta 9500 8.0 6.4 125 10.3 9.6 107
Hickerson Park 9122 6.1 5.1 120 7.2 7.0 103
Hole-in-Rock 9168 5.5 4.9 112 6.9 6.8 101
Indian Creek 9425 17.8 16.3 109 15.3 14.2 108
Kelley R.S. 8180 12.9 10.5 123 13.7 11.7 117
Spirit Lk 10235 12.1 7.9 153 12.1 11.1 109
Steel Creek Park 10158 12.9 10.1 128 12.5 11.2 112
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Basin Index (%) 125 108
UPPER BEAR RIVER
Bear River RS 8777 8.2 6.4 128 10.1 8.3 122
Bug Lake 7987 17.4 13.4 130 14.3 13.2 108
Burts Miller Ranch 8000 6.0 4.8 125 9.7 5.4 180
Chalk Creek #1 9171 18.8 15.0 125 19.4 16.0 121
Giveout 6930 8.4 7.2 117 10.0 9.2 109
Hayden Fork 9130 12.6 10.2 124 17.0 14.3 119
Kelley R.S. 8180 12.9 10.5 123 13.7 11.7 117
Lily Lake 9133 11.3 8.8 128 11.2 11.0 102
Monte Cristo 8932 23.7 18.0 132 22.5 18.1 124
Salt River Summit 7640 11.7 9.5 123 11.6 11.2 104
Spring Creek Divide 9000 16.7 16.8 99 16.0 17.4 92
Trial Lake 9992 22.0 15.4 143 21.9 16.2 135
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Basin Index (%) 125 117
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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.
