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: MARCH 1 , 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 14.2 14.8 96 15.9 16.8 95
Blind Bull Sum 8650 19.0 19.4 98 12.8 15.2 84
Cottonwood Creek 7670 19.6 17.6 111 20.5 19.5 105
East Rim Divide 7930 9.2 9.0 102 8.6 9.2 93
Grand Targhee 9260 34.8 33.1 105 21.6 25.8 84
Granite Creek 6770 12.6 14.3 88 10.8 15.8 68
Grassy Lake 7265 26.9 26.0 103 30.4 28.4 107
Gros Ventre Summit 8750 9.1 9.4 97 8.2 9.4 87
Gunsight Pass 9820 10.1 10.4 97 9.7 10.9 89
Lewis Lake Divide 7850 27.8 24.6 113 30.0 26.6 113
Loomis Park 8240 11.9 12.7 94 12.1 13.9 87
Phillips Bench 8200 22.7 20.8 109 23.2 21.8 106
Salt River Summit 7640 15.1 10.8 140 14.4 12.6 114
Snake River Station 6920 15.8 14.6 108 18.4 17.4 106
Somsen Ranch 6800 15.0 10.8 139 16.2 13.4 121
Spring Creek Divide 9000 -M 19.4 * -M 19.2 *
Thumb Divide 7980 15.5 12.9 120 14.7 13.8 107
Togwotee Pass 9580 17.6 18.8 94 16.5 19.8 83
Triple Peak 8500 19.3 19.4 99 19.8 20.6 96
Two Ocean Plateau 9240 24.6 22.6 109 20.1 20.5 98
Willow Creek 8080 28.1 23.6 119 27.4 25.8 106
Younts Peak 8350 13.5 11.8 114 10.9 11.4 96
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Basin Index (%) 107 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 32.8 29.9 110 31.4 29.1 108
Canyon 7870 11.2 -M * 13.3 -M *
Madison Plateau 7750 21.7 17.4 125 22.2 20.0 111
West Yellowstone 6700 12.3 9.3 132 14.9 11.3 132
Whiskey Creek 6800 15.4 12.2 126 19.3 15.6 124
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Basin Index (%) 119 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 14.7 17.9 82 13.5 16.5 82
Canyon 7870 11.2 -M * 13.3 -M *
Evening Star 9200 21.4 21.8 98 22.8 23.7 96
Fisher Creek 9100 27.2 26.6 102 27.8 25.6 109
Monument Peak 8850 16.8 16.5 102 19.2 17.1 112
Northeast Entrance 7350 8.0 8.6 93 10.2 10.8 94
Parker Peak 9400 18.8 17.2 109 18.4 15.7 117
Sylvan Lake 8420 15.5 15.7 99 18.5 18.4 101
Thumb Divide 7980 15.5 12.9 120 14.7 13.8 107
Two Ocean Plateau 9240 24.6 22.6 109 20.1 20.5 98
White Mill 8700 19.6 19.0 103 18.6 18.4 101
Wolverine 7650 11.5 9.8 117 10.6 10.2 104
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Basin Index (%) 103 102
WIND RIVER
Burroughs Creek 8750 8.6 -M * 8.8 -M *
Castle Creek 8400 5.0 6.2 81 5.6 6.9 81
Cold Springs 9630 6.7 5.7 118 8.0 6.9 116
Deer Park 9700 18.0 10.4 173 18.5 13.1 141
Hobbs Park 10100 12.0 10.1 119 11.2 8.8 127
Kirwin 9550 7.8 8.6 91 9.8 9.1 108
Little Warm 9370 8.0 7.8 103 9.0 9.4 96
South Pass 9040 14.7 11.3 130 13.5 11.4 118
St. Lawrence Alt 8620 5.5 -M * 7.5 -M *
Togwotee Pass 9580 17.6 18.8 94 16.5 19.8 83
Townsend Creek 8700 9.1 6.5 140 10.0 8.1 123
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Basin Index (%) 116 109
BIGHORN BASIN
Bald Mtn. 9380 15.2 14.8 103 12.3 12.8 96
Bear Trap Meadow 8200 7.3 5.0 146 7.3 6.2 118
Bone Springs Div 9350 11.4 12.8 89 9.4 12.4 76
Grave Springs 8550 8.3 6.6 126 8.8 6.8 129
Kirwin 9550 7.8 8.6 91 9.8 9.1 108
Marquette 8760 6.0 5.2 115 6.6 6.7 99
Middle Powder 7760 9.4 7.8 121 8.1 7.0 116
Owl Creek 8975 5.7 4.3 133 6.2 4.8 129
Powder River Pass 9480 8.9 8.6 103 10.8 9.6 112
Shell Creek 9580 11.0 11.8 93 11.4 10.8 106
Timber Creek 7950 4.4 4.0 110 4.9 5.6 88
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Basin Index (%) 107 104
SHOSHONE RIVER
Blackwater 9780 16.1 17.2 94 16.3 17.0 96
Evening Star 9200 21.4 21.8 98 22.8 23.7 96
Marquette 8760 6.0 5.2 115 6.6 6.7 99
Sylvan Lake 8420 15.5 15.7 99 18.5 18.4 101
Sylvan Road 7120 9.1 10.2 89 12.4 14.0 89
Younts Peak 8350 13.5 11.8 114 10.9 11.4 96
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Basin Index (%) 100 96
POWDER RIVER
Bear Trap Meadow 8200 7.3 5.0 146 7.3 6.2 118
Cloud Peak Reservoir 9860 11.4 11.6 98 11.1 10.2 109
Grave Springs 8550 8.3 6.6 126 8.8 6.8 129
Hansen Sawmill 8360 6.4 5.4 119 6.6 6.2 106
Middle Powder 7760 9.4 7.8 121 8.1 7.0 116
Powder River Pass 9480 8.9 8.6 103 10.8 9.6 112
Soldier Park 8720 5.9 5.2 113 6.0 7.0 86
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Basin Index (%) 115 111
TONGUE RIVER
Big Goose 7990 8.0 6.0 133 8.7 7.8 112
Bone Springs Div 9350 11.4 12.8 89 9.4 12.4 76
Burgess Junction 7880 10.2 8.2 124 11.4 9.2 124
Dome Lake 8880 8.8 8.8 100 9.6 9.4 102
Little Goose 8870 8.8 7.4 119 9.6 9.3 103
Sucker Creek 8880 11.1 9.5 117 13.3 10.6 125
Tie Creek 6870 7.8 4.4 177 10.8 8.4 129
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Basin Index (%) 116 108
BELLE FOURCHE
Blind Park 6890 7.5 6.6 114 8.9 8.8 101
Cole Canyon 5910 7.4 4.7 157 8.5 7.2 118
North Rapid Creek 6130 6.5 5.8 112 7.1 7.2 99
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Basin Index (%) 125 106
CHEYENNE RIVER BASIN
Blind Park 6890 7.5 6.6 114 8.9 8.8 101
North Rapid Creek 6130 6.5 5.8 112 7.1 7.2 99
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Basin Index (%) 113 100
UPPER N. PLATTE
Arapaho Ridge 10976 19.6 17.2 114 19.1 17.0 112
Blackhall Mtn 9839 29.6 22.1 134 29.2 22.2 132
Cinnabar Park 9707 17.5 16.8 104 19.2 19.5 98
Columbine 9167 22.6 18.9 120 -M 19.0 *
Divide Peak 8730 22.2 15.2 146 22.4 16.9 133
Joe Wright 10158 18.7 16.3 115 21.0 20.4 103
Laprele Creek 8390 10.2 7.2 142 10.6 8.4 126
Med Bow 10512 31.3 -M * 27.8 -M *
Never Summer 10323 -M 16.0 * -M 13.4 *
North French Creek 10153 23.9 22.1 108 23.7 21.3 111
Old Battle 9860 31.7 24.2 131 32.1 27.2 118
Rawah 9069 11.6 9.0 129 13.1 12.4 106
Sage Creek Basin 7850 21.2 11.4 186 17.7 10.7 165
Sand Lake 10098 22.3 21.2 105 21.6 18.2 119
South Brush Creek 8495 12.2 9.4 130 11.6 10.8 107
Tower 10620 41.1 35.2 117 37.8 32.8 115
Webber Springs 9260 23.0 16.7 138 24.8 20.2 123
Whiskey Park 9020 31.5 21.4 147 28.8 22.0 131
Willow Creek Pass 9523 13.2 10.6 125 13.3 10.6 125
Zirkel 9338 25.2 23.1 109 27.3 24.8 110
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Basin Index (%) 125 118
SWEETWATER
Deer Park 9700 18.0 10.4 173 18.5 13.1 141
Larsen Creek 9000 8.5 9.5 89 11.2 10.8 104
South Pass 9040 14.7 11.3 130 13.5 11.4 118
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Basin Index (%) 132 122
LOWER N. PLATTE
Casper Mtn. 7920 11.6 9.6 121 11.4 10.2 112
Laprele Creek 8390 10.2 7.2 142 10.6 8.4 126
Reno Hill 8430 12.8 10.2 125 14.1 10.7 132
Windy Peak 7915 9.2 6.0 153 9.9 7.4 134
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Basin Index (%) 133 125
LARAMIE RIVER
Brooklyn Lake 10250 20.4 16.5 124 20.5 17.0 121
Cinnabar Park 9707 17.5 16.8 104 19.2 19.5 98
Crow Creek 8335 4.6 5.9 78 7.3 7.8 94
Deadman Hill 10239 15.0 13.3 113 13.8 13.0 106
Rawah 9069 11.6 9.0 129 13.1 12.4 106
Roach 9740 14.9 12.3 121 16.6 14.8 112
Windy Peak 7915 9.2 6.0 153 9.9 7.4 134
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Basin Index (%) 117 109
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 14.2 10.2 139 18.2 12.2 149
Divide Peak 8730 22.2 15.2 146 22.4 16.9 133
Elk River 8739 22.5 15.1 149 21.7 15.0 145
Elkhead Divide 8800 25.0 -M * 24.6 -M *
Little Snake River 8928 29.7 21.8 136 32.0 27.0 119
Old Battle 9860 31.7 24.2 131 32.1 27.2 118
Sage Creek Basin 7850 21.2 11.4 186 17.7 10.7 165
Sandstone RS 8152 19.1 10.3 185 20.3 14.8 137
Whiskey Park 9020 31.5 21.4 147 28.8 22.0 131
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Basin Index (%) 148 133
UPPER GREEN RIVER
Big Sandy Opening 9080 11.7 10.2 115 11.7 10.0 117
Blind Bull Sum 8650 19.0 19.4 98 12.8 15.2 84
East Rim Divide 7930 9.2 9.0 102 8.6 9.2 93
Elkhart Park G.S. 9400 9.2 9.6 96 8.4 10.0 84
Gros Ventre Summit 8750 9.1 9.4 97 8.2 9.4 87
Gunsight Pass 9820 10.1 10.4 97 9.7 10.9 89
Indian Creek 9425 21.3 18.9 113 18.2 16.0 114
Kendall R.S. 7740 9.3 9.8 95 9.7 10.6 92
Larsen Creek 9000 8.5 9.5 89 11.2 10.8 104
Loomis Park 8240 11.9 12.7 94 12.1 13.9 87
New Fork Lake 8340 8.6 8.7 99 -M 8.3 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.1 10.8 103 12.1 11.2 108
Spring Creek Divide 9000 -M 19.4 * -M 19.2 *
Triple Peak 8500 19.3 19.4 99 19.8 20.6 96
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Basin Index (%) 100 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 10.0 6.7 149 10.5 9.6 109
Buck Pasture 9632 14.4 -M * 16.2 -M *
EF Blacks Fork GS 9360 10.7 8.9 120 8.2 8.6 95
Hams Fork 7840 11.7 9.2 127 10.8 8.7 124
Henrys Fork 10182 -M -M * 11.2 -M *
Hewinta 9500 9.6 8.0 120 11.7 10.5 111
Hickerson Park 9122 7.7 6.1 126 8.6 8.2 105
Hole-in-Rock 9168 6.4 5.7 112 8.1 7.6 107
Indian Creek 9425 21.3 18.9 113 18.2 16.0 114
Kelley R.S. 8180 15.9 12.0 132 16.4 13.4 122
Spirit Lk 10235 14.8 9.3 159 14.5 12.6 115
Steel Creek Park 10158 14.6 11.3 129 14.4 12.7 113
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Basin Index (%) 128 113
UPPER BEAR RIVER
Bear River RS 8777 10.2 7.6 134 11.6 9.3 125
Bug Lake 7987 21.8 14.8 147 17.5 14.6 120
Burts Miller Ranch 8000 7.2 5.3 136 11.0 5.7 193
Chalk Creek #1 9171 23.0 17.8 129 22.2 17.7 125
Giveout 6930 11.5 7.9 146 12.0 9.8 122
Hayden Fork 9130 15.2 11.8 129 19.2 16.2 119
Kelley R.S. 8180 15.9 12.0 132 16.4 13.4 122
Lily Lake 9133 11.7 10.1 116 12.7 12.3 103
Monte Cristo 8932 28.2 20.6 137 26.6 20.3 131
Salt River Summit 7640 15.1 10.8 140 14.4 12.6 114
Spring Creek Divide 9000 -M 19.4 * -M 19.2 *
Trial Lake 9992 25.5 17.5 146 25.2 17.8 142
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Basin Index (%) 136 126
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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.
