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 TUESDAY: FEBRUARY 28 , 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 14.1 14.8 95 15.8 16.8 94
Blind Bull Sum 8650 18.9 19.2 98 12.7 15.0 85
Cottonwood Creek 7670 19.2 17.4 110 19.9 19.4 103
East Rim Divide 7930 9.3 8.8 106 8.7 9.2 95
Grand Targhee 9260 34.3 33.0 104 21.5 25.8 83
Granite Creek 6770 12.4 14.2 87 10.6 15.8 67
Grassy Lake 7265 26.3 26.0 101 29.8 28.3 105
Gros Ventre Summit 8750 9.1 9.4 97 8.2 9.4 87
Gunsight Pass 9820 10.0 10.4 96 9.7 10.9 89
Lewis Lake Divide 7850 27.3 24.6 111 29.8 26.6 112
Loomis Park 8240 11.8 12.5 94 12.0 13.8 87
Phillips Bench 8200 22.2 20.4 109 22.6 21.6 105
Salt River Summit 7640 14.9 10.7 139 14.3 12.6 113
Snake River Station 6920 15.5 14.3 108 18.0 17.3 104
Somsen Ranch 6800 14.7 10.8 136 15.9 13.2 120
Spring Creek Divide 9000 20.2 19.4 104 16.4 19.1 86
Thumb Divide 7980 15.3 12.6 121 14.5 13.4 108
Togwotee Pass 9580 17.4 18.5 94 16.2 19.8 82
Triple Peak 8500 18.9 18.8 101 19.5 20.5 95
Two Ocean Plateau 9240 24.3 22.6 108 19.9 20.4 98
Willow Creek 8080 27.8 23.0 121 27.0 25.7 105
Younts Peak 8350 13.3 11.7 114 10.8 11.4 95
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Basin Index (%) 106 97
MADISON HEADWATERS IN WYOMING
Black Bear 8170 32.0 29.6 108 30.9 28.2 110
Canyon 7870 11.0 -M * 13.0 -M *
Madison Plateau 7750 21.3 17.2 124 21.7 19.8 110
West Yellowstone 6700 12.1 9.0 134 14.7 11.0 134
Whiskey Creek 6800 15.0 12.0 125 19.3 15.4 125
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Basin Index (%) 119 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.5 17.8 81 13.4 16.4 82
Canyon 7870 11.0 -M * 13.0 -M *
Evening Star 9200 21.3 21.7 98 22.7 23.7 96
Fisher Creek 9100 26.9 26.2 103 27.5 25.6 107
Monument Peak 8850 16.8 16.4 102 19.1 16.9 113
Northeast Entrance 7350 7.9 8.6 92 10.1 10.8 94
Parker Peak 9400 18.5 17.0 109 18.2 15.6 117
Sylvan Lake 8420 15.4 15.6 99 18.4 18.2 101
Thumb Divide 7980 15.3 12.6 121 14.5 13.4 108
Two Ocean Plateau 9240 24.3 22.6 108 19.9 20.4 98
White Mill 8700 19.4 19.0 102 18.5 18.4 101
Wolverine 7650 11.4 9.8 116 10.6 10.1 105
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Basin Index (%) 102 102
WIND RIVER
Burroughs Creek 8750 8.6 -M * 8.8 -M *
Castle Creek 8400 5.1 6.1 84 5.6 6.9 81
Cold Springs 9630 6.6 5.7 116 8.0 6.8 118
Deer Park 9700 17.4 10.1 172 18.0 13.1 137
Hobbs Park 10100 11.8 9.8 120 11.2 8.6 130
Kirwin 9550 7.7 8.5 91 9.7 9.0 108
Little Warm 9370 8.0 7.8 103 9.0 9.2 98
South Pass 9040 14.2 11.3 126 13.2 11.2 118
St. Lawrence Alt 8620 5.6 -M * 7.6 -M *
Togwotee Pass 9580 17.4 18.5 94 16.2 19.8 82
Townsend Creek 8700 9.0 6.5 138 10.0 8.1 123
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Basin Index (%) 115 109
BIGHORN BASIN
Bald Mtn. 9380 15.4 14.4 107 12.5 12.4 101
Bear Trap Meadow 8200 7.3 4.8 152 7.5 6.2 121
Bone Springs Div 9350 11.3 12.6 90 9.4 12.4 76
Grave Springs 8550 8.4 6.5 129 8.9 6.8 131
Kirwin 9550 7.7 8.5 91 9.7 9.0 108
Marquette 8760 6.0 5.0 120 6.6 6.6 100
Middle Powder 7760 9.4 7.8 121 8.2 6.8 121
Owl Creek 8975 5.8 4.2 138 6.3 4.7 134
Powder River Pass 9480 8.8 8.5 104 10.8 9.6 112
Shell Creek 9580 11.1 11.7 95 11.4 10.7 107
Timber Creek 7950 4.4 3.4 129 4.9 5.6 88
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Basin Index (%) 109 106
SHOSHONE RIVER
Blackwater 9780 15.9 17.2 92 16.2 16.9 96
Evening Star 9200 21.3 21.7 98 22.7 23.7 96
Marquette 8760 6.0 5.0 120 6.6 6.6 100
Sylvan Lake 8420 15.4 15.6 99 18.4 18.2 101
Sylvan Road 7120 9.0 10.2 88 12.3 13.8 89
Younts Peak 8350 13.3 11.7 114 10.8 11.4 95
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Basin Index (%) 99 96
POWDER RIVER
Bear Trap Meadow 8200 7.3 4.8 152 7.5 6.2 121
Cloud Peak Reservoir 9860 11.4 11.4 100 11.1 10.2 109
Grave Springs 8550 8.4 6.5 129 8.9 6.8 131
Hansen Sawmill 8360 6.5 5.1 127 6.7 6.0 112
Middle Powder 7760 9.4 7.8 121 8.2 6.8 121
Powder River Pass 9480 8.8 8.5 104 10.8 9.6 112
Soldier Park 8720 5.9 5.2 113 6.1 7.0 87
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Basin Index (%) 117 113
TONGUE RIVER
Big Goose 7990 8.1 6.0 135 8.7 7.8 112
Bone Springs Div 9350 11.3 12.6 90 9.4 12.4 76
Burgess Junction 7880 10.2 8.0 128 11.5 9.2 125
Dome Lake 8880 8.8 8.6 102 9.6 9.4 102
Little Goose 8870 8.8 7.4 119 9.6 9.3 103
Sucker Creek 8880 11.2 9.3 120 13.4 10.4 129
Tie Creek 6870 7.9 4.4 180 10.8 8.4 129
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Basin Index (%) 118 109
BELLE FOURCHE
Blind Park 6890 7.2 6.6 109 8.6 8.6 100
Cole Canyon 5910 7.3 4.7 155 8.4 7.2 117
North Rapid Creek 6130 6.4 5.8 110 6.9 7.1 97
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Basin Index (%) 122 104
CHEYENNE RIVER BASIN
Blind Park 6890 7.2 6.6 109 8.6 8.6 100
North Rapid Creek 6130 6.4 5.8 110 6.9 7.1 97
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Basin Index (%) 110 99
UPPER N. PLATTE
Arapaho Ridge 10976 19.5 17.2 113 19.0 17.0 112
Blackhall Mtn 9839 29.1 22.1 132 28.6 22.2 129
Cinnabar Park 9707 -M 16.9 * 18.8 19.5 96
Columbine 9167 22.8 18.8 121 21.0 18.9 111
Divide Peak 8730 21.8 15.0 145 22.4 16.7 134
Joe Wright 10158 19.0 16.2 117 20.8 20.4 102
Laprele Creek 8390 10.2 7.2 142 10.6 8.4 126
Med Bow 10512 30.5 -M * 27.1 -M *
Never Summer 10323 -M 16.0 * -M 13.2 *
North French Creek 10153 23.6 22.0 107 23.3 21.0 111
Old Battle 9860 30.9 24.2 128 29.4 26.8 110
Rawah 9069 11.7 9.0 130 13.0 12.3 106
Sage Creek Basin 7850 21.0 11.4 184 17.4 10.7 163
Sand Lake 10098 22.0 21.0 105 21.3 18.0 118
South Brush Creek 8495 12.1 9.3 130 11.5 10.8 106
Tower 10620 41.1 35.1 117 37.6 32.3 116
Webber Springs 9260 22.2 16.7 133 24.2 20.1 120
Whiskey Park 9020 31.1 21.2 147 28.3 21.8 130
Willow Creek Pass 9523 13.1 10.5 125 13.2 10.6 125
Zirkel 9338 24.8 22.5 110 26.7 24.7 108
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Basin Index (%) 126 117
SWEETWATER
Deer Park 9700 17.4 10.1 172 18.0 13.1 137
Larsen Creek 9000 8.4 9.3 90 11.0 10.6 104
South Pass 9040 14.2 11.3 126 13.2 11.2 118
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Basin Index (%) 130 121
LOWER N. PLATTE
Casper Mtn. 7920 11.6 9.5 122 11.3 10.2 111
Laprele Creek 8390 10.2 7.2 142 10.6 8.4 126
Reno Hill 8430 12.8 9.8 131 14.1 10.6 133
Windy Peak 7915 9.3 6.0 155 9.9 7.4 134
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Basin Index (%) 135 125
LARAMIE RIVER
Brooklyn Lake 10250 19.8 16.2 122 20.1 17.0 118
Cinnabar Park 9707 -M 16.9 * 18.8 19.5 96
Crow Creek 8335 4.6 5.9 78 7.2 7.8 92
Deadman Hill 10239 14.9 13.2 113 13.6 13.0 105
Rawah 9069 11.7 9.0 130 13.0 12.3 106
Roach 9740 14.8 12.1 122 16.5 14.8 111
Windy Peak 7915 9.3 6.0 155 9.9 7.4 134
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Basin Index (%) 120 108
S. PLATTE
Crow Creek 8335 4.6 5.9 78 7.2 7.8 92
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Basin Index (%) 78 92
LITTLE SNAKE RIVER
Battle Mountain 7498 14.1 10.0 141 18.0 12.2 148
Divide Peak 8730 21.8 15.0 145 22.4 16.7 134
Elk River 8739 22.3 14.8 151 21.1 15.0 141
Elkhead Divide 8800 24.8 -M * 24.2 -M *
Little Snake River 8928 29.1 21.8 133 31.7 27.0 117
Old Battle 9860 30.9 24.2 128 29.4 26.8 110
Sage Creek Basin 7850 21.0 11.4 184 17.4 10.7 163
Sandstone RS 8152 18.7 10.2 183 20.2 14.6 138
Whiskey Park 9020 31.1 21.2 147 28.3 21.8 130
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Basin Index (%) 147 130
UPPER GREEN RIVER
Big Sandy Opening 9080 11.5 10.2 113 11.6 10.0 116
Blind Bull Sum 8650 18.9 19.2 98 12.7 15.0 85
East Rim Divide 7930 9.3 8.8 106 8.7 9.2 95
Elkhart Park G.S. 9400 9.3 9.6 97 8.5 10.0 85
Gros Ventre Summit 8750 9.1 9.4 97 8.2 9.4 87
Gunsight Pass 9820 10.0 10.4 96 9.7 10.9 89
Indian Creek 9425 20.9 18.8 111 17.8 15.8 113
Kendall R.S. 7740 9.3 9.6 97 9.6 10.6 91
Larsen Creek 9000 8.4 9.3 90 11.0 10.6 104
Loomis Park 8240 11.8 12.5 94 12.0 13.8 87
New Fork Lake 8340 8.6 8.6 100 -M 8.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.0 10.6 104 12.1 11.2 108
Spring Creek Divide 9000 20.2 19.4 104 16.4 19.1 86
Triple Peak 8500 18.9 18.8 101 19.5 20.5 95
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Basin Index (%) 101 95
LOWER GREEN RIVER
Blacks Fork Jct 8869 9.7 6.6 147 10.2 9.5 107
Buck Pasture 9632 13.8 -M * 15.7 -M *
EF Blacks Fork GS 9360 10.4 8.4 124 7.8 8.4 93
Hams Fork 7840 11.5 9.1 126 10.6 8.7 122
Henrys Fork 10182 -M -M * 10.8 -M *
Hewinta 9500 9.0 7.8 115 11.3 10.3 110
Hickerson Park 9122 7.7 6.0 128 8.5 7.9 108
Hole-in-Rock 9168 6.3 5.6 112 8.1 7.6 107
Indian Creek 9425 20.9 18.8 111 17.8 15.8 113
Kelley R.S. 8180 15.6 12.0 130 16.2 13.2 123
Spirit Lk 10235 14.6 9.3 157 14.5 12.5 116
Steel Creek Park 10158 14.1 11.3 125 13.9 12.4 112
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Basin Index (%) 126 112
UPPER BEAR RIVER
Bear River RS 8777 9.7 7.4 131 11.3 9.2 123
Bug Lake 7987 21.1 14.8 143 17.0 14.4 118
Burts Miller Ranch 8000 7.2 5.0 144 10.8 5.7 189
Chalk Creek #1 9171 22.5 17.4 129 21.8 17.4 125
Giveout 6930 11.3 7.8 145 11.9 9.7 123
Hayden Fork 9130 14.3 11.7 122 18.4 16.1 114
Kelley R.S. 8180 15.6 12.0 130 16.2 13.2 123
Lily Lake 9133 11.3 10.0 113 12.3 12.2 101
Monte Cristo 8932 27.2 20.4 133 25.7 20.0 128
Salt River Summit 7640 14.9 10.7 139 14.3 12.6 113
Spring Creek Divide 9000 20.2 19.4 104 16.4 19.1 86
Trial Lake 9992 24.9 17.4 143 24.4 17.8 137
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Basin Index (%) 130 120
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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.
