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 27 , 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 14.0 14.8 95 15.6 16.8 93
Blind Bull Sum 8650 17.9 19.0 94 12.3 14.8 83
Cottonwood Creek 7670 18.3 17.2 106 19.2 19.2 100
East Rim Divide 7930 8.9 8.8 101 8.5 9.0 94
Grand Targhee 9260 33.9 33.0 103 21.4 25.6 84
Granite Creek 6770 12.1 14.2 85 10.5 15.8 66
Grassy Lake 7265 26.1 26.0 100 29.6 27.9 106
Gros Ventre Summit 8750 8.8 9.4 94 8.2 9.4 87
Gunsight Pass 9820 9.8 10.2 96 9.6 10.8 89
Lewis Lake Divide 7850 26.8 24.6 109 29.7 26.4 112
Loomis Park 8240 11.4 12.4 92 11.6 13.8 84
Phillips Bench 8200 21.7 20.4 106 22.2 21.4 104
Salt River Summit 7640 13.9 10.6 131 13.5 12.5 108
Snake River Station 6920 15.2 14.2 107 18.0 17.3 104
Somsen Ranch 6800 14.2 10.8 131 15.7 13.2 119
Spring Creek Divide 9000 19.4 19.2 101 16.4 19.1 86
Thumb Divide 7980 15.1 12.4 122 14.5 13.4 108
Togwotee Pass 9580 17.1 18.4 93 16.0 19.6 82
Triple Peak 8500 18.1 18.4 98 18.8 20.1 94
Two Ocean Plateau 9240 23.9 22.6 106 19.8 20.2 98
Willow Creek 8080 26.5 22.8 116 26.1 25.6 102
Younts Peak 8350 13.2 11.6 114 10.9 11.4 96
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Basin Index (%) 104 96
MADISON HEADWATERS IN WYOMING
Black Bear 8170 31.8 29.4 108 30.6 28.2 109
Canyon 7870 11.0 -M * 13.1 -M *
Madison Plateau 7750 20.9 17.0 123 21.6 19.7 110
West Yellowstone 6700 11.9 9.0 132 14.6 11.0 133
Whiskey Creek 6800 15.0 11.9 126 18.9 15.3 124
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Basin Index (%) 118 115
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.5 17.8 81 13.4 16.3 82
Canyon 7870 11.0 -M * 13.1 -M *
Evening Star 9200 21.0 21.4 98 22.7 23.6 96
Fisher Creek 9100 26.6 26.1 102 27.3 25.4 107
Monument Peak 8850 16.7 16.4 102 19.1 16.8 114
Northeast Entrance 7350 7.9 8.5 93 10.0 10.7 93
Parker Peak 9400 18.6 16.8 111 18.3 15.6 117
Sylvan Lake 8420 15.3 15.4 99 18.2 18.2 100
Thumb Divide 7980 15.1 12.4 122 14.5 13.4 108
Two Ocean Plateau 9240 23.9 22.6 106 19.8 20.2 98
White Mill 8700 19.2 18.9 102 18.4 18.3 101
Wolverine 7650 11.5 9.8 117 10.6 9.9 107
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Basin Index (%) 102 102
WIND RIVER
Burroughs Creek 8750 8.5 -M * 8.6 -M *
Castle Creek 8400 5.0 6.2 81 5.7 6.9 83
Cold Springs 9630 6.6 5.7 116 7.9 6.8 116
Deer Park 9700 16.4 10.0 164 17.0 13.1 130
Hobbs Park 10100 11.5 9.8 117 10.9 8.5 128
Kirwin 9550 7.6 8.4 90 9.6 8.9 108
Little Warm 9370 7.7 7.7 100 8.8 9.2 96
South Pass 9040 13.4 11.3 119 13.0 11.0 118
St. Lawrence Alt 8620 5.5 -M * 7.6 -M *
Togwotee Pass 9580 17.1 18.4 93 16.0 19.6 82
Townsend Creek 8700 8.8 6.5 135 9.8 7.9 124
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Basin Index (%) 112 107
BIGHORN BASIN
Bald Mtn. 9380 15.3 14.4 106 12.5 12.4 101
Bear Trap Meadow 8200 7.4 4.8 154 7.5 6.2 121
Bone Springs Div 9350 11.4 12.6 90 9.5 12.0 79
Grave Springs 8550 8.4 6.4 131 8.9 6.7 133
Kirwin 9550 7.6 8.4 90 9.6 8.9 108
Marquette 8760 6.1 5.1 120 6.8 6.6 103
Middle Powder 7760 9.4 7.7 122 8.2 6.8 121
Owl Creek 8975 5.7 4.2 136 6.3 4.6 137
Powder River Pass 9480 8.7 8.4 104 10.8 9.6 112
Shell Creek 9580 10.9 11.6 94 11.3 10.7 106
Timber Creek 7950 4.3 3.4 126 5.0 5.6 89
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Basin Index (%) 109 107
SHOSHONE RIVER
Blackwater 9780 15.8 17.0 93 16.1 16.8 96
Evening Star 9200 21.0 21.4 98 22.7 23.6 96
Marquette 8760 6.1 5.1 120 6.8 6.6 103
Sylvan Lake 8420 15.3 15.4 99 18.2 18.2 100
Sylvan Road 7120 9.1 10.0 91 12.2 13.8 88
Younts Peak 8350 13.2 11.6 114 10.9 11.4 96
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Basin Index (%) 100 96
POWDER RIVER
Bear Trap Meadow 8200 7.4 4.8 154 7.5 6.2 121
Cloud Peak Reservoir 9860 11.3 11.3 100 11.0 10.0 110
Grave Springs 8550 8.4 6.4 131 8.9 6.7 133
Hansen Sawmill 8360 6.5 5.0 130 6.7 6.0 112
Middle Powder 7760 9.4 7.7 122 8.2 6.8 121
Powder River Pass 9480 8.7 8.4 104 10.8 9.6 112
Soldier Park 8720 6.1 5.2 117 6.1 7.0 87
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Basin Index (%) 118 113
TONGUE RIVER
Big Goose 7990 8.2 6.0 137 8.6 7.8 110
Bone Springs Div 9350 11.4 12.6 90 9.5 12.0 79
Burgess Junction 7880 10.2 8.0 128 11.6 9.2 126
Dome Lake 8880 8.8 8.6 102 9.7 9.4 103
Little Goose 8870 8.7 7.4 118 9.6 9.3 103
Sucker Creek 8880 11.2 9.3 120 13.5 10.4 130
Tie Creek 6870 8.0 4.4 182 10.9 8.3 131
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Basin Index (%) 118 111
BELLE FOURCHE
Blind Park 6890 7.1 6.6 108 8.6 8.6 100
Cole Canyon 5910 -M 4.7 * 8.4 7.1 118
North Rapid Creek 6130 6.4 5.8 110 6.9 7.0 99
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Basin Index (%) 109 105
CHEYENNE RIVER BASIN
Blind Park 6890 7.1 6.6 108 8.6 8.6 100
North Rapid Creek 6130 6.4 5.8 110 6.9 7.0 99
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Basin Index (%) 109 99
UPPER N. PLATTE
Arapaho Ridge 10976 19.2 17.2 112 18.8 16.9 111
Blackhall Mtn 9839 28.4 22.1 129 28.0 22.0 127
Cinnabar Park 9707 -M 16.6 * 18.8 19.0 99
Columbine 9167 22.1 18.8 118 20.8 18.9 110
Divide Peak 8730 21.3 14.9 143 22.2 16.6 134
Joe Wright 10158 18.7 16.0 117 20.8 20.2 103
Laprele Creek 8390 10.1 7.1 142 10.6 8.4 126
Med Bow 10512 30.4 -M * 27.0 -M *
Never Summer 10323 -M 15.8 * -M 13.1 *
North French Creek 10153 23.4 21.7 108 23.3 20.9 111
Old Battle 9860 30.2 23.8 127 29.5 26.0 113
Rawah 9069 11.7 9.0 130 13.1 12.2 107
Sage Creek Basin 7850 20.2 11.3 179 16.8 10.5 160
Sand Lake 10098 21.7 20.9 104 21.0 18.0 117
South Brush Creek 8495 12.1 9.2 132 11.5 10.8 106
Tower 10620 40.4 34.8 116 37.4 32.2 116
Webber Springs 9260 21.6 16.6 130 23.6 19.7 120
Whiskey Park 9020 30.1 21.0 143 27.8 21.8 128
Willow Creek Pass 9523 13.0 10.5 124 13.2 10.6 125
Zirkel 9338 24.0 22.4 107 26.2 24.7 106
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Basin Index (%) 124 116
SWEETWATER
Deer Park 9700 16.4 10.0 164 17.0 13.1 130
Larsen Creek 9000 7.7 9.2 84 10.4 10.6 98
South Pass 9040 13.4 11.3 119 13.0 11.0 118
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Basin Index (%) 123 116
LOWER N. PLATTE
Casper Mtn. 7920 11.5 9.5 121 11.3 10.1 112
Laprele Creek 8390 10.1 7.1 142 10.6 8.4 126
Reno Hill 8430 12.7 9.8 130 14.1 10.6 133
Windy Peak 7915 9.2 6.0 153 9.8 7.4 132
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Basin Index (%) 134 125
LARAMIE RIVER
Brooklyn Lake 10250 19.4 16.2 120 19.8 16.9 117
Cinnabar Park 9707 -M 16.6 * 18.8 19.0 99
Crow Creek 8335 4.6 5.9 78 7.3 7.8 94
Deadman Hill 10239 14.6 13.1 111 13.6 13.0 105
Rawah 9069 11.7 9.0 130 13.1 12.2 107
Roach 9740 14.7 12.0 122 16.5 14.7 112
Windy Peak 7915 9.2 6.0 153 9.8 7.4 132
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Basin Index (%) 119 109
S. PLATTE
Crow Creek 8335 4.6 5.9 78 7.3 7.8 94
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Basin Index (%) 78 94
LITTLE SNAKE RIVER
Battle Mountain 7498 14.1 10.0 141 17.9 12.0 149
Divide Peak 8730 21.3 14.9 143 22.2 16.6 134
Elk River 8739 21.6 14.5 149 21.1 15.0 141
Elkhead Divide 8800 24.0 -M * 23.8 -M *
Little Snake River 8928 28.2 21.4 132 31.5 27.0 117
Old Battle 9860 30.2 23.8 127 29.5 26.0 113
Sage Creek Basin 7850 20.2 11.3 179 16.8 10.5 160
Sandstone RS 8152 18.3 10.0 183 20.0 14.2 141
Whiskey Park 9020 30.1 21.0 143 27.8 21.8 128
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Basin Index (%) 145 131
UPPER GREEN RIVER
Big Sandy Opening 9080 11.0 10.0 110 11.2 10.0 112
Blind Bull Sum 8650 17.9 19.0 94 12.3 14.8 83
East Rim Divide 7930 8.9 8.8 101 8.5 9.0 94
Elkhart Park G.S. 9400 9.0 9.6 94 8.2 10.0 82
Gros Ventre Summit 8750 8.8 9.4 94 8.2 9.4 87
Gunsight Pass 9820 9.8 10.2 96 9.6 10.8 89
Indian Creek 9425 19.8 18.6 106 17.2 15.6 110
Kendall R.S. 7740 9.0 9.6 94 9.3 10.6 88
Larsen Creek 9000 7.7 9.2 84 10.4 10.6 98
Loomis Park 8240 11.4 12.4 92 11.6 13.8 84
New Fork Lake 8340 8.4 8.5 99 -M 8.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 10.6 10.6 100 11.7 11.1 105
Spring Creek Divide 9000 19.4 19.2 101 16.4 19.1 86
Triple Peak 8500 18.1 18.4 98 18.8 20.1 94
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Basin Index (%) 98 93
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.6 6.4 150 10.0 9.5 105
Buck Pasture 9632 13.4 -M * 15.4 -M *
EF Blacks Fork GS 9360 10.3 8.1 127 7.8 8.4 93
Hams Fork 7840 11.3 9.0 126 10.5 8.7 121
Henrys Fork 10182 -M -M * 10.6 -M *
Hewinta 9500 9.0 7.6 118 11.2 10.2 110
Hickerson Park 9122 7.6 5.8 131 8.5 7.8 109
Hole-in-Rock 9168 6.3 5.4 117 8.0 7.4 108
Indian Creek 9425 19.8 18.6 106 17.2 15.6 110
Kelley R.S. 8180 15.1 12.0 126 15.8 13.1 121
Spirit Lk 10235 14.2 8.8 161 14.1 12.5 113
Steel Creek Park 10158 14.0 11.2 125 13.8 12.0 115
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Basin Index (%) 126 111
UPPER BEAR RIVER
Bear River RS 8777 9.4 7.2 131 11.1 9.0 123
Bug Lake 7987 20.4 14.8 138 16.3 14.2 115
Burts Miller Ranch 8000 7.0 5.0 140 10.6 5.7 186
Chalk Creek #1 9171 21.6 16.5 131 21.0 17.3 121
Giveout 6930 10.4 7.6 137 11.3 9.6 118
Hayden Fork 9130 13.7 11.6 118 18.3 15.8 116
Kelley R.S. 8180 15.1 12.0 126 15.8 13.1 121
Lily Lake 9133 11.1 9.8 113 12.1 11.9 102
Monte Cristo 8932 26.2 20.0 131 25.0 19.6 128
Salt River Summit 7640 13.9 10.6 131 13.5 12.5 108
Spring Creek Divide 9000 19.4 19.2 101 16.4 19.1 86
Trial Lake 9992 23.8 17.4 137 23.8 17.8 134
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Basin Index (%) 127 118
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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.
