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 MONDAY: FEBRUARY 13 , 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 12.8 86 12.5 14.9 84
Blind Bull Sum 8650 14.8 16.2 91 10.4 13.1 79
Cottonwood Creek 7670 15.6 14.8 105 16.6 17.0 98
East Rim Divide 7930 7.7 7.6 101 7.3 7.8 94
Grand Targhee 9260 29.9 30.4 98 18.6 23.2 80
Granite Creek 6770 10.5 11.8 89 9.4 13.8 68
Grassy Lake 7265 19.9 22.0 90 23.5 25.1 94
Gros Ventre Summit 8750 7.9 8.4 94 7.5 8.2 91
Gunsight Pass 9820 8.7 8.9 98 8.5 9.8 87
Lewis Lake Divide 7850 21.7 20.6 105 24.2 23.6 103
Loomis Park 8240 9.9 10.8 92 10.0 11.4 88
Phillips Bench 8200 18.2 17.4 105 18.9 19.0 99
Salt River Summit 7640 11.6 8.8 132 11.6 10.8 107
Snake River Station 6920 12.3 12.8 96 14.5 16.1 90
Somsen Ranch 6800 11.7 9.4 124 13.6 11.9 114
Spring Creek Divide 9000 16.6 16.2 102 16.1 16.3 99
Thumb Divide 7980 12.8 10.7 120 12.5 12.2 102
Togwotee Pass 9580 14.7 15.4 95 14.3 16.8 85
Triple Peak 8500 15.2 15.6 97 15.7 16.8 93
Two Ocean Plateau 9240 19.7 20.8 95 16.2 18.1 90
Willow Creek 8080 23.1 19.5 118 22.5 22.7 99
Younts Peak 8350 10.6 9.8 108 9.3 10.3 90
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Basin Index (%) 101 93
MADISON HEADWATERS IN WYOMING
Black Bear 8170 27.3 25.1 109 27.1 25.0 108
Canyon 7870 9.5 -M * 11.5 -M *
Madison Plateau 7750 18.5 14.9 124 19.3 16.0 121
West Yellowstone 6700 10.4 7.8 133 13.1 10.0 131
Whiskey Creek 6800 13.2 10.1 131 17.2 12.8 134
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Basin Index (%) 120 120
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 11.2 15.8 71 10.3 14.7 70
Canyon 7870 9.5 -M * 11.5 -M *
Evening Star 9200 16.5 18.9 87 19.1 20.4 94
Fisher Creek 9100 22.1 23.3 95 23.2 22.9 101
Monument Peak 8850 14.0 14.4 97 16.2 15.3 106
Northeast Entrance 7350 6.3 7.1 89 8.6 9.4 91
Parker Peak 9400 15.4 14.9 103 15.7 14.2 111
Sylvan Lake 8420 12.6 13.5 93 15.6 16.4 95
Thumb Divide 7980 12.8 10.7 120 12.5 12.2 102
Two Ocean Plateau 9240 19.7 20.8 95 16.2 18.1 90
White Mill 8700 15.6 17.2 91 15.2 16.0 95
Wolverine 7650 8.0 8.8 91 8.6 8.8 98
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Basin Index (%) 93 96
WIND RIVER
Burroughs Creek 8750 6.9 -M * 7.4 -M *
Castle Creek 8400 4.4 5.0 88 5.0 6.3 79
Cold Springs 9630 5.7 5.4 106 6.9 6.5 106
Deer Park 9700 15.1 9.1 166 15.3 11.0 139
Hobbs Park 10100 10.4 8.8 118 9.7 7.8 124
Kirwin 9550 6.1 7.4 82 7.9 8.2 96
Little Warm 9370 6.8 6.8 100 7.8 8.1 96
South Pass 9040 11.8 9.0 131 11.8 10.0 118
St. Lawrence Alt 8620 4.8 -M * 6.5 -M *
Togwotee Pass 9580 14.7 15.4 95 14.3 16.8 85
Townsend Creek 8700 7.4 5.8 128 8.4 7.2 117
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Basin Index (%) 113 106
BIGHORN BASIN
Bald Mtn. 9380 12.9 12.8 101 10.7 10.8 99
Bear Trap Meadow 8200 6.2 4.4 141 6.6 5.5 120
Bone Springs Div 9350 8.7 11.0 79 7.7 10.2 75
Grave Springs 8550 7.5 5.2 144 7.8 6.3 124
Kirwin 9550 6.1 7.4 82 7.9 8.2 96
Marquette 8760 4.8 4.6 104 5.3 6.3 84
Middle Powder 7760 8.2 6.4 128 7.1 6.2 115
Owl Creek 8975 5.1 3.8 134 5.7 4.2 136
Powder River Pass 9480 7.0 7.4 95 8.8 8.7 101
Shell Creek 9580 8.4 10.0 84 8.9 9.2 97
Timber Creek 7950 3.7 3.2 116 4.2 5.1 82
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Basin Index (%) 103 100
SHOSHONE RIVER
Blackwater 9780 13.0 15.9 82 13.1 15.4 85
Evening Star 9200 16.5 18.9 87 19.1 20.4 94
Marquette 8760 4.8 4.6 104 5.3 6.3 84
Sylvan Lake 8420 12.6 13.5 93 15.6 16.4 95
Sylvan Road 7120 7.2 8.6 84 10.0 12.6 79
Younts Peak 8350 10.6 9.8 108 9.3 10.3 90
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Basin Index (%) 91 89
POWDER RIVER
Bear Trap Meadow 8200 6.2 4.4 141 6.6 5.5 120
Cloud Peak Reservoir 9860 9.3 9.4 99 9.3 8.8 106
Grave Springs 8550 7.5 5.2 144 7.8 6.3 124
Hansen Sawmill 8360 5.1 4.6 111 5.3 5.6 95
Middle Powder 7760 8.2 6.4 128 7.1 6.2 115
Powder River Pass 9480 7.0 7.4 95 8.8 8.7 101
Soldier Park 8720 3.6 4.4 82 5.0 6.3 79
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Basin Index (%) 112 105
TONGUE RIVER
Big Goose 7990 6.5 5.4 120 7.0 6.9 101
Bone Springs Div 9350 8.7 11.0 79 7.7 10.2 75
Burgess Junction 7880 8.8 7.1 124 10.2 8.0 128
Dome Lake 8880 6.1 7.6 80 7.9 8.3 95
Little Goose 8870 7.1 6.6 108 8.0 8.0 100
Sucker Creek 8880 9.4 8.1 116 11.6 9.1 127
Tie Creek 6870 6.6 3.6 183 9.5 7.5 127
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Basin Index (%) 108 107
BELLE FOURCHE
Blind Park 6890 5.8 5.4 107 7.3 7.2 101
Cole Canyon 5910 5.4 4.0 135 6.6 5.6 118
North Rapid Creek 6130 5.4 5.2 104 5.9 5.8 102
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Basin Index (%) 114 106
CHEYENNE RIVER BASIN
Blind Park 6890 5.8 5.4 107 7.3 7.2 101
North Rapid Creek 6130 5.4 5.2 104 5.9 5.8 102
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Basin Index (%) 106 102
UPPER N. PLATTE
Arapaho Ridge 10976 17.4 15.5 112 17.2 15.6 110
Blackhall Mtn 9839 25.5 19.8 129 25.4 20.1 126
Cinnabar Park 9707 -M 14.9 * 16.0 16.7 96
Columbine 9167 20.3 15.8 128 19.1 16.7 114
Divide Peak 8730 18.0 13.6 132 19.5 14.9 131
Joe Wright 10158 17.3 13.6 127 19.5 17.6 111
Laprele Creek 8390 8.3 6.1 136 8.6 7.5 115
Med Bow 10512 26.2 -M * 23.9 -M *
Never Summer 10323 18.1 13.4 135 13.0 11.4 114
North French Creek 10153 20.9 18.5 113 20.7 18.1 114
Old Battle 9860 26.2 21.4 122 27.0 23.9 113
Rawah 9069 11.2 8.0 140 12.4 11.2 111
Sage Creek Basin 7850 15.3 9.9 155 14.7 9.5 155
Sand Lake 10098 18.8 17.8 106 18.7 16.4 114
South Brush Creek 8495 11.5 8.0 144 10.5 9.2 114
Tower 10620 37.5 30.0 125 32.9 28.0 118
Webber Springs 9260 18.4 14.6 126 20.4 17.8 115
Whiskey Park 9020 27.7 18.3 151 25.5 19.6 130
Willow Creek Pass 9523 12.0 9.2 130 12.2 9.2 133
Zirkel 9338 20.9 19.8 106 -M 22.0 *
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Basin Index (%) 126 118
SWEETWATER
Deer Park 9700 15.1 9.1 166 15.3 11.0 139
Larsen Creek 9000 7.1 7.2 99 9.2 9.2 100
South Pass 9040 11.8 9.0 131 11.8 10.0 118
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Basin Index (%) 134 120
LOWER N. PLATTE
Casper Mtn. 7920 9.7 8.2 118 9.7 9.0 108
Laprele Creek 8390 8.3 6.1 136 8.6 7.5 115
Reno Hill 8430 11.0 8.7 126 12.3 9.2 134
Windy Peak 7915 7.1 5.0 142 8.0 6.7 119
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Basin Index (%) 129 119
LARAMIE RIVER
Brooklyn Lake 10250 16.1 14.6 110 16.9 14.4 117
Cinnabar Park 9707 -M 14.9 * 16.0 16.7 96
Crow Creek 8335 4.2 5.6 75 6.6 7.2 92
Deadman Hill 10239 13.0 11.6 112 12.2 11.8 103
Rawah 9069 11.2 8.0 140 12.4 11.2 111
Roach 9740 13.1 10.9 120 14.7 12.8 115
Windy Peak 7915 7.1 5.0 142 8.0 6.7 119
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Basin Index (%) 116 107
S. PLATTE
Crow Creek 8335 4.2 5.6 75 6.6 7.2 92
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Basin Index (%) 75 92
LITTLE SNAKE RIVER
Battle Mountain 7498 13.0 8.2 159 16.8 10.9 154
Divide Peak 8730 18.0 13.6 132 19.5 14.9 131
Elk River 8739 19.5 12.8 152 18.3 13.4 137
Elkhead Divide 8800 21.7 -M * 21.6 -M *
Little Snake River 8928 25.8 17.5 147 29.8 23.8 125
Old Battle 9860 26.2 21.4 122 27.0 23.9 113
Sage Creek Basin 7850 15.3 9.9 155 14.7 9.5 155
Sandstone RS 8152 16.7 9.2 182 18.2 12.6 144
Whiskey Park 9020 27.7 18.3 151 25.5 19.6 130
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Basin Index (%) 146 132
UPPER GREEN RIVER
Big Sandy Opening 9080 9.7 8.9 109 9.5 8.5 112
Blind Bull Sum 8650 14.8 16.2 91 10.4 13.1 79
East Rim Divide 7930 7.7 7.6 101 7.3 7.8 94
Elkhart Park G.S. 9400 8.3 8.4 99 7.5 8.9 84
Gros Ventre Summit 8750 7.9 8.4 94 7.5 8.2 91
Gunsight Pass 9820 8.7 8.9 98 8.5 9.8 87
Indian Creek 9425 17.9 15.7 114 15.3 14.1 109
Kendall R.S. 7740 7.7 8.2 94 8.1 9.4 86
Larsen Creek 9000 7.1 7.2 99 9.2 9.2 100
Loomis Park 8240 9.9 10.8 92 10.0 11.4 88
New Fork Lake 8340 7.3 7.4 99 -M 7.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 8.7 8.9 98 9.9 9.4 105
Spring Creek Divide 9000 16.6 16.2 102 16.1 16.3 99
Triple Peak 8500 15.2 15.6 97 15.7 16.8 93
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Basin Index (%) 99 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 8.8 5.6 157 9.2 8.8 105
Buck Pasture 9632 12.3 -M * 14.3 -M *
EF Blacks Fork GS 9360 9.6 7.2 133 7.4 7.2 103
Hams Fork 7840 9.9 8.0 124 9.4 7.7 122
Henrys Fork 10182 -M -M * 9.8 -M *
Hewinta 9500 7.9 6.2 127 10.2 9.4 109
Hickerson Park 9122 6.0 4.8 125 7.1 6.9 103
Hole-in-Rock 9168 5.6 4.8 117 6.9 6.8 101
Indian Creek 9425 17.9 15.7 114 15.3 14.1 109
Kelley R.S. 8180 13.0 10.0 130 13.8 11.6 119
Spirit Lk 10235 12.0 7.6 158 12.0 10.9 110
Steel Creek Park 10158 12.8 10.0 128 12.7 10.9 117
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Basin Index (%) 130 110
UPPER BEAR RIVER
Bear River RS 8777 8.3 6.4 130 10.0 8.2 122
Bug Lake 7987 17.2 13.0 132 14.3 12.8 112
Burts Miller Ranch 8000 6.1 4.8 127 9.8 5.4 181
Chalk Creek #1 9171 18.8 14.8 127 19.4 15.8 123
Giveout 6930 8.1 6.7 121 9.6 9.1 105
Hayden Fork 9130 12.5 9.7 129 16.8 14.0 120
Kelley R.S. 8180 13.0 10.0 130 13.8 11.6 119
Lily Lake 9133 11.3 8.8 128 11.2 10.8 104
Monte Cristo 8932 23.5 17.5 134 22.5 17.8 126
Salt River Summit 7640 11.6 8.8 132 11.6 10.8 107
Spring Creek Divide 9000 16.6 16.2 102 16.1 16.3 99
Trial Lake 9992 21.9 14.8 148 22.0 15.8 139
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Basin Index (%) 128 119
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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.
