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 8 , 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 14.7 15.4 95 16.6 17.4 95
Blind Bull Sum 8650 19.9 20.4 98 13.5 15.8 85
Cottonwood Creek 7670 20.2 18.8 107 21.3 21.1 101
East Rim Divide 7930 9.5 9.6 99 9.0 9.8 92
Grand Targhee 9260 36.6 33.8 108 22.1 26.5 83
Granite Creek 6770 13.5 15.2 89 11.5 16.3 71
Grassy Lake 7265 28.5 27.2 105 32.0 29.4 109
Gros Ventre Summit 8750 9.1 10.5 87 8.4 10.2 82
Gunsight Pass 9820 10.4 10.9 95 10.0 11.6 86
Lewis Lake Divide 7850 29.2 25.4 115 30.5 27.9 109
Loomis Park 8240 12.4 13.4 93 12.6 14.4 88
Phillips Bench 8200 24.1 21.8 111 24.4 22.8 107
Salt River Summit 7640 15.8 11.4 139 15.0 13.0 115
Snake River Station 6920 16.7 15.1 111 19.1 18.8 102
Somsen Ranch 6800 15.8 11.2 141 17.0 14.1 121
Spring Creek Divide 9000 -M 20.5 * -M 19.9 *
Thumb Divide 7980 16.2 13.4 121 15.1 14.7 103
Togwotee Pass 9580 18.4 20.2 91 17.3 21.4 81
Triple Peak 8500 19.9 20.7 96 20.2 21.7 93
Two Ocean Plateau 9240 25.3 23.8 106 20.0 21.8 92
Willow Creek 8080 29.5 25.1 118 28.2 27.8 101
Younts Peak 8350 13.6 13.0 105 10.8 12.4 87
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Basin Index (%) 106 96
MADISON HEADWATERS IN WYOMING
Black Bear 8170 35.0 32.0 109 32.6 31.6 103
Canyon 7870 12.0 -M * 14.0 -M *
Madison Plateau 7750 23.2 19.1 121 23.6 20.8 113
West Yellowstone 6700 13.1 9.4 139 15.8 12.3 128
Whiskey Creek 6800 16.5 13.4 123 20.4 16.6 123
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Basin Index (%) 119 114
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 15.4 18.6 83 14.3 17.3 83
Canyon 7870 12.0 -M * 14.0 -M *
Evening Star 9200 22.2 22.6 98 23.9 24.6 97
Fisher Creek 9100 28.4 27.6 103 28.8 26.9 107
Monument Peak 8850 17.6 17.2 102 19.8 17.8 111
Northeast Entrance 7350 8.5 9.4 90 10.7 11.2 96
Parker Peak 9400 19.3 18.4 105 18.6 17.0 109
Sylvan Lake 8420 16.2 16.6 98 19.2 19.0 101
Thumb Divide 7980 16.2 13.4 121 15.1 14.7 103
Two Ocean Plateau 9240 25.3 23.8 106 20.0 21.8 92
White Mill 8700 20.7 20.4 101 19.6 19.2 102
Wolverine 7650 11.8 10.5 112 10.9 10.6 103
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Basin Index (%) 102 100
WIND RIVER
Burroughs Creek 8750 8.7 -M * 9.0 -M *
Castle Creek 8400 5.1 6.8 75 5.6 7.4 76
Cold Springs 9630 6.7 6.3 106 8.2 7.2 114
Deer Park 9700 18.9 11.0 172 19.2 14.0 137
Hobbs Park 10100 12.2 11.2 109 11.4 9.8 116
Kirwin 9550 8.0 9.1 88 10.0 9.6 104
Little Warm 9370 8.2 8.4 98 9.2 10.0 92
South Pass 9040 15.3 12.2 125 14.6 12.6 116
St. Lawrence Alt 8620 5.4 -M * 7.2 -M *
Togwotee Pass 9580 18.4 20.2 91 17.3 21.4 81
Townsend Creek 8700 9.3 7.4 126 10.2 8.4 121
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Basin Index (%) 110 105
BIGHORN BASIN
Bald Mtn. 9380 15.7 15.8 99 12.8 13.2 97
Bear Trap Meadow 8200 7.6 5.4 141 7.6 6.6 115
Bone Springs Div 9350 11.9 13.6 88 9.8 12.6 78
Grave Springs 8550 8.5 7.0 121 9.0 7.4 122
Kirwin 9550 8.0 9.1 88 10.0 9.6 104
Marquette 8760 6.1 5.6 109 6.7 7.2 93
Middle Powder 7760 9.5 8.4 113 8.2 8.0 102
Owl Creek 8975 5.7 4.5 127 6.2 4.9 127
Powder River Pass 9480 9.6 9.2 104 11.5 10.2 113
Shell Creek 9580 11.5 12.4 93 11.8 11.0 107
Timber Creek 7950 4.4 4.2 105 4.8 5.9 81
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Basin Index (%) 103 102
SHOSHONE RIVER
Blackwater 9780 16.8 19.0 88 16.9 18.0 94
Evening Star 9200 22.2 22.6 98 23.9 24.6 97
Marquette 8760 6.1 5.6 109 6.7 7.2 93
Sylvan Lake 8420 16.2 16.6 98 19.2 19.0 101
Sylvan Road 7120 9.5 10.4 91 12.8 14.4 89
Younts Peak 8350 13.6 13.0 105 10.8 12.4 87
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Basin Index (%) 97 94
POWDER RIVER
Bear Trap Meadow 8200 7.6 5.4 141 7.6 6.6 115
Cloud Peak Reservoir 9860 12.0 12.2 98 11.6 10.6 109
Grave Springs 8550 8.5 7.0 121 9.0 7.4 122
Hansen Sawmill 8360 7.0 5.6 125 7.2 6.6 109
Middle Powder 7760 9.5 8.4 113 8.2 8.0 102
Powder River Pass 9480 9.6 9.2 104 11.5 10.2 113
Soldier Park 8720 6.4 5.7 112 6.4 7.5 85
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Basin Index (%) 113 108
TONGUE RIVER
Big Goose 7990 8.4 6.4 131 9.1 8.0 114
Bone Springs Div 9350 11.9 13.6 88 9.8 12.6 78
Burgess Junction 7880 10.5 9.0 117 11.8 9.6 123
Dome Lake 8880 9.2 9.2 100 9.9 9.8 101
Little Goose 8870 9.1 7.8 117 10.0 9.6 104
Sucker Creek 8880 11.5 10.2 113 13.7 11.4 120
Tie Creek 6870 7.9 4.6 172 11.0 8.8 125
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Basin Index (%) 113 108
BELLE FOURCHE
Blind Park 6890 8.3 6.8 122 9.6 9.0 107
Cole Canyon 5910 7.8 4.8 162 9.0 7.4 122
North Rapid Creek 6130 7.1 6.0 118 7.7 7.4 104
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Basin Index (%) 132 111
CHEYENNE RIVER BASIN
Blind Park 6890 8.3 6.8 122 9.6 9.0 107
North Rapid Creek 6130 7.1 6.0 118 7.7 7.4 104
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Basin Index (%) 120 105
UPPER N. PLATTE
Arapaho Ridge 10976 20.0 17.8 112 19.3 18.0 107
Blackhall Mtn 9839 31.7 23.3 136 31.1 23.2 134
Cinnabar Park 9707 -M 17.7 * 20.2 20.3 100
Columbine 9167 23.5 20.4 115 21.6 20.2 107
Divide Peak 8730 23.8 16.2 147 23.0 17.8 129
Joe Wright 10158 19.6 17.9 109 21.8 21.6 101
Laprele Creek 8390 10.6 7.8 136 11.0 9.2 120
Med Bow 10512 34.0 -M * 29.7 -M *
Never Summer 10323 -M 16.6 * -M 14.2 *
North French Creek 10153 25.9 22.8 114 25.4 22.0 115
Old Battle 9860 33.5 25.4 132 30.4 27.9 109
Rawah 9069 12.0 9.6 125 13.5 12.8 105
Sage Creek Basin 7850 22.0 11.9 185 18.2 10.8 169
Sand Lake 10098 24.2 21.8 111 23.3 19.6 119
South Brush Creek 8495 13.3 10.2 130 12.5 11.2 112
Tower 10620 41.9 37.5 112 38.5 33.4 115
Webber Springs 9260 24.3 18.0 135 26.2 21.0 125
Whiskey Park 9020 33.5 22.8 147 30.4 23.4 130
Willow Creek Pass 9523 13.5 10.7 126 13.6 11.0 124
Zirkel 9338 27.0 25.1 108 28.9 26.4 109
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Basin Index (%) 125 117
SWEETWATER
Deer Park 9700 18.9 11.0 172 19.2 14.0 137
Larsen Creek 9000 9.2 10.0 92 11.8 11.0 107
South Pass 9040 15.3 12.2 125 14.6 12.6 116
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Basin Index (%) 131 121
LOWER N. PLATTE
Casper Mtn. 7920 11.9 10.6 112 11.7 10.6 110
Laprele Creek 8390 10.6 7.8 136 11.0 9.2 120
Reno Hill 8430 13.0 11.2 116 14.3 11.4 125
Windy Peak 7915 9.7 6.5 149 10.3 7.7 134
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Basin Index (%) 125 122
LARAMIE RIVER
Brooklyn Lake 10250 21.9 17.3 127 22.0 17.8 124
Cinnabar Park 9707 -M 17.7 * 20.2 20.3 100
Crow Creek 8335 4.7 6.4 73 7.4 8.1 91
Deadman Hill 10239 16.0 13.8 116 14.8 14.0 106
Rawah 9069 12.0 9.6 125 13.5 12.8 105
Roach 9740 15.6 12.6 124 17.4 15.2 114
Windy Peak 7915 9.7 6.5 149 10.3 7.7 134
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Basin Index (%) 121 110
S. PLATTE
Crow Creek 8335 4.7 6.4 73 7.4 8.1 91
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Basin Index (%) 73 91
LITTLE SNAKE RIVER
Battle Mountain 7498 15.2 10.6 143 19.2 12.6 152
Divide Peak 8730 23.8 16.2 147 23.0 17.8 129
Elk River 8739 23.9 16.4 146 22.9 16.0 143
Elkhead Divide 8800 26.4 -M * 25.9 -M *
Little Snake River 8928 31.4 22.8 138 34.3 27.4 125
Old Battle 9860 33.5 25.4 132 30.4 27.9 109
Sage Creek Basin 7850 22.0 11.9 185 18.2 10.8 169
Sandstone RS 8152 20.3 11.4 178 21.3 15.5 137
Whiskey Park 9020 33.5 22.8 147 30.4 23.4 130
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Basin Index (%) 148 132
UPPER GREEN RIVER
Big Sandy Opening 9080 12.2 10.9 112 12.3 10.6 116
Blind Bull Sum 8650 19.9 20.4 98 13.5 15.8 85
East Rim Divide 7930 9.5 9.6 99 9.0 9.8 92
Elkhart Park G.S. 9400 9.7 10.2 95 8.8 10.6 83
Gros Ventre Summit 8750 9.1 10.5 87 8.4 10.2 82
Gunsight Pass 9820 10.4 10.9 95 10.0 11.6 86
Indian Creek 9425 22.4 19.4 115 19.1 16.8 114
Kendall R.S. 7740 9.6 10.7 90 10.1 11.4 89
Larsen Creek 9000 9.2 10.0 92 11.8 11.0 107
Loomis Park 8240 12.4 13.4 93 12.6 14.4 88
New Fork Lake 8340 8.9 9.2 97 -M 9.1 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 11.5 11.4 101 12.5 12.0 104
Spring Creek Divide 9000 -M 20.5 * -M 19.9 *
Triple Peak 8500 19.9 20.7 96 20.2 21.7 93
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Basin Index (%) 98 95
LOWER GREEN RIVER
Blacks Fork Jct 8869 10.9 7.0 156 11.6 9.8 118
Buck Pasture 9632 15.9 -M * 17.5 -M *
EF Blacks Fork GS 9360 11.7 9.8 119 9.0 9.2 98
Hams Fork 7840 12.4 9.8 127 11.5 9.2 125
Henrys Fork 10182 -M -M * 12.0 -M *
Hewinta 9500 10.7 8.6 124 12.8 10.9 117
Hickerson Park 9122 8.4 6.6 127 9.3 8.6 108
Hole-in-Rock 9168 7.1 6.0 118 8.6 8.0 108
Indian Creek 9425 22.4 19.4 115 19.1 16.8 114
Kelley R.S. 8180 16.7 12.4 135 17.3 14.0 124
Spirit Lk 10235 16.0 9.9 162 15.4 13.3 116
Steel Creek Park 10158 16.1 12.4 130 15.8 13.0 122
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Basin Index (%) 130 116
UPPER BEAR RIVER
Bear River RS 8777 11.5 7.8 147 12.9 9.4 137
Bug Lake 7987 23.2 15.6 149 18.8 15.0 125
Burts Miller Ranch 8000 7.7 5.7 135 11.6 6.1 190
Chalk Creek #1 9171 25.1 18.8 134 23.8 18.8 127
Giveout 6930 11.9 8.4 142 12.4 10.2 122
Hayden Fork 9130 17.1 12.5 137 21.5 16.8 128
Kelley R.S. 8180 16.7 12.4 135 17.3 14.0 124
Lily Lake 9133 13.2 10.6 125 14.2 12.8 111
Monte Cristo 8932 30.5 22.7 134 28.4 21.0 135
Salt River Summit 7640 15.8 11.4 139 15.0 13.0 115
Spring Creek Divide 9000 -M 20.5 * -M 19.9 *
Trial Lake 9992 27.2 18.6 146 26.7 18.4 145
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Basin Index (%) 138 130
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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.
