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: MARCH 6 , 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 14.6 15.2 96 16.5 17.4 95
Blind Bull Sum 8650 19.8 19.8 100 13.4 15.6 86
Cottonwood Creek 7670 20.0 18.4 109 21.1 20.5 103
East Rim Divide 7930 9.5 9.4 101 9.0 9.6 94
Grand Targhee 9260 36.4 33.7 108 22.2 26.4 84
Granite Creek 6770 13.4 15.1 89 11.6 16.1 72
Grassy Lake 7265 28.3 26.9 105 31.8 29.1 109
Gros Ventre Summit 8750 9.2 10.1 91 8.4 10.1 83
Gunsight Pass 9820 10.4 10.7 97 10.0 11.4 88
Lewis Lake Divide 7850 29.1 25.0 116 30.6 27.4 112
Loomis Park 8240 12.4 13.4 93 12.5 14.2 88
Phillips Bench 8200 24.0 21.8 110 24.2 22.8 106
Salt River Summit 7640 15.6 11.0 142 14.9 13.0 115
Snake River Station 6920 16.7 14.9 112 19.0 18.5 103
Somsen Ranch 6800 15.9 10.9 146 16.9 14.0 121
Spring Creek Divide 9000 21.2 20.0 106 -M 19.7 *
Thumb Divide 7980 16.1 13.2 122 15.1 14.2 106
Togwotee Pass 9580 18.3 19.8 92 17.0 21.2 80
Triple Peak 8500 19.9 19.7 101 20.5 20.7 99
Two Ocean Plateau 9240 25.1 23.6 106 20.1 21.6 93
Willow Creek 8080 29.1 24.4 119 27.8 27.1 103
Younts Peak 8350 13.6 12.5 109 11.0 11.8 93
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Basin Index (%) 107 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 34.5 31.4 110 32.6 31.1 105
Canyon 7870 11.9 -M * 13.9 -M *
Madison Plateau 7750 22.9 18.2 126 23.3 20.4 114
West Yellowstone 6700 13.0 9.1 143 15.6 11.4 137
Whiskey Creek 6800 16.3 12.6 129 20.7 16.1 129
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Basin Index (%) 122 117
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 15.2 18.3 83 14.1 17.1 82
Canyon 7870 11.9 -M * 13.9 -M *
Evening Star 9200 22.1 22.4 99 23.8 24.4 98
Fisher Creek 9100 28.2 26.9 105 28.8 26.6 108
Monument Peak 8850 17.3 16.9 102 19.7 17.8 111
Northeast Entrance 7350 8.4 9.2 91 10.6 11.0 96
Parker Peak 9400 19.2 18.2 105 18.6 16.6 112
Sylvan Lake 8420 16.1 16.2 99 19.2 18.8 102
Thumb Divide 7980 16.1 13.2 122 15.1 14.2 106
Two Ocean Plateau 9240 25.1 23.6 106 20.1 21.6 93
White Mill 8700 20.5 20.2 101 19.4 18.8 103
Wolverine 7650 11.8 10.6 111 11.0 10.4 106
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Basin Index (%) 102 102
WIND RIVER
Burroughs Creek 8750 8.8 -M * 9.0 -M *
Castle Creek 8400 5.1 6.4 80 5.6 7.2 78
Cold Springs 9630 6.7 6.2 108 8.2 7.2 114
Deer Park 9700 18.5 10.7 173 18.9 13.4 141
Hobbs Park 10100 12.1 11.0 110 11.3 9.6 118
Kirwin 9550 8.0 8.7 92 10.0 9.4 106
Little Warm 9370 8.2 8.2 100 9.2 9.8 94
South Pass 9040 15.1 12.0 126 14.4 12.2 118
St. Lawrence Alt 8620 5.4 -M * 7.5 -M *
Togwotee Pass 9580 18.3 19.8 92 17.0 21.2 80
Townsend Creek 8700 9.1 7.2 126 10.0 8.4 119
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Basin Index (%) 112 106
BIGHORN BASIN
Bald Mtn. 9380 15.7 15.6 101 12.7 13.0 98
Bear Trap Meadow 8200 7.6 5.4 141 7.6 6.5 117
Bone Springs Div 9350 11.8 13.2 89 9.8 12.6 78
Grave Springs 8550 8.5 7.0 121 8.9 7.2 124
Kirwin 9550 8.0 8.7 92 10.0 9.4 106
Marquette 8760 6.1 5.6 109 6.7 7.0 96
Middle Powder 7760 9.5 8.4 113 8.2 7.7 106
Owl Creek 8975 5.7 4.5 127 6.3 4.9 129
Powder River Pass 9480 9.5 8.8 108 11.4 9.8 116
Shell Creek 9580 11.4 12.2 93 11.8 10.9 108
Timber Creek 7950 4.4 4.0 110 4.9 5.8 84
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Basin Index (%) 105 104
SHOSHONE RIVER
Blackwater 9780 16.7 18.2 92 16.9 17.9 94
Evening Star 9200 22.1 22.4 99 23.8 24.4 98
Marquette 8760 6.1 5.6 109 6.7 7.0 96
Sylvan Lake 8420 16.1 16.2 99 19.2 18.8 102
Sylvan Road 7120 9.5 10.4 91 12.8 14.3 90
Younts Peak 8350 13.6 12.5 109 11.0 11.8 93
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Basin Index (%) 99 96
POWDER RIVER
Bear Trap Meadow 8200 7.6 5.4 141 7.6 6.5 117
Cloud Peak Reservoir 9860 11.9 12.0 99 11.5 10.6 108
Grave Springs 8550 8.5 7.0 121 8.9 7.2 124
Hansen Sawmill 8360 6.8 5.6 121 7.1 6.4 111
Middle Powder 7760 9.5 8.4 113 8.2 7.7 106
Powder River Pass 9480 9.5 8.8 108 11.4 9.8 116
Soldier Park 8720 6.3 5.6 112 6.3 7.4 85
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Basin Index (%) 114 110
TONGUE RIVER
Big Goose 7990 8.4 6.2 135 9.1 8.0 114
Bone Springs Div 9350 11.8 13.2 89 9.8 12.6 78
Burgess Junction 7880 10.5 8.6 122 11.8 9.5 124
Dome Lake 8880 9.2 9.2 100 9.8 9.6 102
Little Goose 8870 9.1 7.6 120 10.0 9.5 105
Sucker Creek 8880 11.5 10.0 115 13.7 11.0 125
Tie Creek 6870 7.9 4.5 176 11.0 8.7 126
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Basin Index (%) 115 109
BELLE FOURCHE
Blind Park 6890 8.2 6.7 122 9.7 8.8 110
Cole Canyon 5910 7.7 4.8 160 8.8 7.4 119
North Rapid Creek 6130 7.2 6.0 120 7.7 7.4 104
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Basin Index (%) 132 111
CHEYENNE RIVER BASIN
Blind Park 6890 8.2 6.7 122 9.7 8.8 110
North Rapid Creek 6130 7.2 6.0 120 7.7 7.4 104
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Basin Index (%) 121 107
UPPER N. PLATTE
Arapaho Ridge 10976 20.0 17.6 114 19.4 17.7 110
Blackhall Mtn 9839 31.3 22.9 137 30.8 23.1 133
Cinnabar Park 9707 -M 17.4 * 20.1 19.8 102
Columbine 9167 23.4 20.2 116 21.6 19.7 110
Divide Peak 8730 23.6 15.8 149 22.9 17.6 130
Joe Wright 10158 19.5 17.3 113 21.8 21.4 102
Laprele Creek 8390 10.5 7.7 136 10.9 9.1 120
Med Bow 10512 33.5 -M * 29.4 -M *
Never Summer 10323 -M 16.4 * -M 14.1 *
North French Creek 10153 25.5 22.6 113 25.2 21.8 116
Old Battle 9860 33.3 25.1 133 29.3 27.6 106
Rawah 9069 12.2 9.4 130 13.5 12.8 105
Sage Creek Basin 7850 21.8 11.7 186 18.2 10.8 169
Sand Lake 10098 -M 21.8 * -M 19.0 *
South Brush Creek 8495 13.2 10.2 129 12.4 11.2 111
Tower 10620 42.1 36.9 114 38.6 32.8 118
Webber Springs 9260 24.1 17.4 139 25.8 20.8 124
Whiskey Park 9020 33.2 22.4 148 30.2 23.0 131
Willow Creek Pass 9523 13.5 10.6 127 13.6 11.0 124
Zirkel 9338 26.8 24.4 110 28.8 26.3 110
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Basin Index (%) 128 117
SWEETWATER
Deer Park 9700 18.5 10.7 173 18.9 13.4 141
Larsen Creek 9000 8.9 9.6 93 11.6 11.0 105
South Pass 9040 15.1 12.0 126 14.4 12.2 118
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Basin Index (%) 132 123
LOWER N. PLATTE
Casper Mtn. 7920 11.9 10.3 116 11.7 10.4 112
Laprele Creek 8390 10.5 7.7 136 10.9 9.1 120
Reno Hill 8430 12.9 11.0 117 14.2 11.1 128
Windy Peak 7915 9.5 6.2 153 10.2 7.7 132
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Basin Index (%) 127 123
LARAMIE RIVER
Brooklyn Lake 10250 21.6 17.3 125 21.7 17.6 123
Cinnabar Park 9707 -M 17.4 * 20.1 19.8 102
Crow Creek 8335 4.7 6.0 78 7.4 8.1 91
Deadman Hill 10239 16.1 13.6 118 14.9 13.8 108
Rawah 9069 12.2 9.4 130 13.5 12.8 105
Roach 9740 15.6 12.5 125 17.5 15.2 115
Windy Peak 7915 9.5 6.2 153 10.2 7.7 132
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Basin Index (%) 123 111
S. PLATTE
Crow Creek 8335 4.7 6.0 78 7.4 8.1 91
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Basin Index (%) 78 91
LITTLE SNAKE RIVER
Battle Mountain 7498 15.3 10.6 144 19.3 12.5 154
Divide Peak 8730 23.6 15.8 149 22.9 17.6 130
Elk River 8739 23.8 16.0 149 22.7 15.8 144
Elkhead Divide 8800 26.3 -M * 25.4 -M *
Little Snake River 8928 31.2 22.7 137 33.8 27.2 124
Old Battle 9860 33.3 25.1 133 29.3 27.6 106
Sage Creek Basin 7850 21.8 11.7 186 18.2 10.8 169
Sandstone RS 8152 20.2 11.2 180 21.3 15.3 139
Whiskey Park 9020 33.2 22.4 148 30.2 23.0 131
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Basin Index (%) 149 132
UPPER GREEN RIVER
Big Sandy Opening 9080 12.0 10.8 111 12.1 10.5 115
Blind Bull Sum 8650 19.8 19.8 100 13.4 15.6 86
East Rim Divide 7930 9.5 9.4 101 9.0 9.6 94
Elkhart Park G.S. 9400 9.6 10.1 95 8.8 10.4 85
Gros Ventre Summit 8750 9.2 10.1 91 8.4 10.1 83
Gunsight Pass 9820 10.4 10.7 97 10.0 11.4 88
Indian Creek 9425 22.2 19.2 116 19.1 16.4 116
Kendall R.S. 7740 9.6 10.2 94 10.0 11.4 88
Larsen Creek 9000 8.9 9.6 93 11.6 11.0 105
Loomis Park 8240 12.4 13.4 93 12.5 14.2 88
New Fork Lake 8340 8.9 9.2 97 -M 8.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.6 11.1 105 12.7 11.6 109
Spring Creek Divide 9000 21.2 20.0 106 -M 19.7 *
Triple Peak 8500 19.9 19.7 101 20.5 20.7 99
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Basin Index (%) 101 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 10.8 6.9 157 11.4 9.8 116
Buck Pasture 9632 15.6 -M * 17.3 -M *
EF Blacks Fork GS 9360 11.6 9.6 121 8.9 9.0 99
Hams Fork 7840 12.4 9.7 128 11.4 9.0 127
Henrys Fork 10182 -M -M * 11.8 -M *
Hewinta 9500 10.5 8.4 125 12.6 10.8 117
Hickerson Park 9122 8.0 6.4 125 8.9 8.4 106
Hole-in-Rock 9168 6.9 5.9 117 8.5 8.0 106
Indian Creek 9425 22.2 19.2 116 19.1 16.4 116
Kelley R.S. 8180 16.7 12.2 137 17.2 13.8 125
Spirit Lk 10235 15.6 9.3 168 15.1 13.0 116
Steel Creek Park 10158 15.7 12.2 129 15.5 13.0 119
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Basin Index (%) 131 116
UPPER BEAR RIVER
Bear River RS 8777 11.4 7.8 146 12.8 9.4 136
Bug Lake 7987 23.2 15.5 150 18.7 14.7 127
Burts Miller Ranch 8000 7.6 5.5 138 11.4 6.0 190
Chalk Creek #1 9171 24.7 18.8 131 23.7 18.6 127
Giveout 6930 12.1 8.4 144 12.5 10.0 125
Hayden Fork 9130 16.8 12.4 135 20.6 16.6 124
Kelley R.S. 8180 16.7 12.2 137 17.2 13.8 125
Lily Lake 9133 12.8 10.4 123 13.9 12.7 109
Monte Cristo 8932 30.2 22.2 136 28.2 20.7 136
Salt River Summit 7640 15.6 11.0 142 14.9 13.0 115
Spring Creek Divide 9000 21.2 20.0 106 -M 19.7 *
Trial Lake 9992 26.9 18.4 146 26.5 18.0 147
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Basin Index (%) 135 131
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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.
