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 SUNDAY: MARCH 12 , 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 15.5 15.7 99 17.3 17.6 98
Blind Bull Sum 8650 21.1 20.8 101 14.5 15.8 92
Cottonwood Creek 7670 21.3 19.0 112 22.2 21.4 104
East Rim Divide 7930 10.4 9.7 107 9.9 10.0 99
Grand Targhee 9260 37.2 34.8 107 22.2 26.8 83
Granite Creek 6770 14.9 15.2 98 12.8 16.3 79
Grassy Lake 7265 29.6 27.8 106 33.0 30.5 108
Gros Ventre Summit 8750 9.8 10.6 92 9.0 10.2 88
Gunsight Pass 9820 11.1 11.1 100 10.5 11.9 88
Lewis Lake Divide 7850 30.4 26.0 117 31.2 28.0 111
Loomis Park 8240 13.6 13.5 101 13.7 14.6 94
Phillips Bench 8200 25.5 22.2 115 25.1 23.2 108
Salt River Summit 7640 16.6 11.6 143 15.9 13.4 119
Snake River Station 6920 17.2 15.4 112 19.7 19.1 103
Somsen Ranch 6800 16.9 11.5 147 17.8 14.4 124
Spring Creek Divide 9000 22.9 21.0 109 16.4 20.6 80
Thumb Divide 7980 17.4 13.6 128 16.2 14.9 109
Togwotee Pass 9580 19.3 20.8 93 17.9 21.9 82
Triple Peak 8500 21.1 21.0 100 21.5 22.2 97
Two Ocean Plateau 9240 26.5 24.4 109 20.3 23.0 88
Willow Creek 8080 30.7 26.2 117 29.6 28.2 105
Younts Peak 8350 14.5 13.1 111 11.7 12.4 94
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Basin Index (%) 110 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 37.3 32.6 114 33.3 32.1 104
Canyon 7870 12.6 -M * 14.7 -M *
Madison Plateau 7750 24.8 19.4 128 24.8 21.6 115
West Yellowstone 6700 14.2 9.8 145 16.8 12.6 133
Whiskey Creek 6800 17.8 13.9 128 21.9 17.1 128
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Basin Index (%) 124 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.1 19.2 84 15.0 17.6 85
Canyon 7870 12.6 -M * 14.7 -M *
Evening Star 9200 23.0 22.6 102 24.6 24.7 100
Fisher Creek 9100 29.8 27.8 107 30.1 27.6 109
Monument Peak 8850 18.4 18.0 102 20.4 18.1 113
Northeast Entrance 7350 9.1 9.3 98 11.1 11.4 97
Parker Peak 9400 20.2 18.4 110 19.9 17.4 114
Sylvan Lake 8420 17.0 17.0 100 20.1 19.4 104
Thumb Divide 7980 17.4 13.6 128 16.2 14.9 109
Two Ocean Plateau 9240 26.5 24.4 109 20.3 23.0 88
White Mill 8700 21.6 20.9 103 20.5 20.2 101
Wolverine 7650 12.2 10.8 113 11.3 11.0 103
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Basin Index (%) 105 102
WIND RIVER
Burroughs Creek 8750 9.2 -M * 9.4 -M *
Castle Creek 8400 5.2 6.9 75 5.7 7.5 76
Cold Springs 9630 7.0 6.3 111 8.4 7.4 114
Deer Park 9700 20.5 11.4 180 20.8 14.4 144
Hobbs Park 10100 13.0 11.3 115 12.0 10.1 119
Kirwin 9550 8.6 9.2 93 10.5 10.0 105
Little Warm 9370 8.8 8.7 101 9.8 10.2 96
South Pass 9040 16.7 12.4 135 15.4 12.6 122
St. Lawrence Alt 8620 5.8 -M * 7.9 -M *
Togwotee Pass 9580 19.3 20.8 93 17.9 21.9 82
Townsend Creek 8700 9.9 7.6 130 10.8 8.6 126
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Basin Index (%) 115 108
BIGHORN BASIN
Bald Mtn. 9380 15.9 16.0 99 12.8 13.4 96
Bear Trap Meadow 8200 7.8 5.7 137 7.8 6.6 118
Bone Springs Div 9350 12.7 13.8 92 10.2 12.8 80
Grave Springs 8550 8.7 7.3 119 9.1 7.6 120
Kirwin 9550 8.6 9.2 93 10.5 10.0 105
Marquette 8760 6.2 5.8 107 6.8 7.2 94
Middle Powder 7760 9.6 8.8 109 8.3 8.4 99
Owl Creek 8975 5.9 4.6 128 6.4 5.0 128
Powder River Pass 9480 9.7 9.2 105 11.7 10.2 115
Shell Creek 9580 11.7 12.6 93 12.0 11.3 106
Timber Creek 7950 4.4 4.1 107 4.9 6.0 82
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Basin Index (%) 104 102
SHOSHONE RIVER
Blackwater 9780 17.6 19.4 91 17.8 18.4 97
Evening Star 9200 23.0 22.6 102 24.6 24.7 100
Marquette 8760 6.2 5.8 107 6.8 7.2 94
Sylvan Lake 8420 17.0 17.0 100 20.1 19.4 104
Sylvan Road 7120 9.8 10.4 94 13.2 14.6 90
Younts Peak 8350 14.5 13.1 111 11.7 12.4 94
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Basin Index (%) 100 97
POWDER RIVER
Bear Trap Meadow 8200 7.8 5.7 137 7.8 6.6 118
Cloud Peak Reservoir 9860 12.2 12.3 99 11.9 11.0 108
Grave Springs 8550 8.7 7.3 119 9.1 7.6 120
Hansen Sawmill 8360 7.1 5.8 122 7.4 6.6 112
Middle Powder 7760 9.6 8.8 109 8.3 8.4 99
Powder River Pass 9480 9.7 9.2 105 11.7 10.2 115
Soldier Park 8720 7.1 5.8 122 6.7 7.7 87
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Basin Index (%) 113 108
TONGUE RIVER
Big Goose 7990 8.6 6.7 128 9.2 8.2 112
Bone Springs Div 9350 12.7 13.8 92 10.2 12.8 80
Burgess Junction 7880 10.6 9.1 116 11.9 9.9 120
Dome Lake 8880 9.6 9.6 100 10.0 10.0 100
Little Goose 8870 9.2 7.8 118 10.1 9.7 104
Sucker Creek 8880 11.6 10.2 114 13.9 11.6 120
Tie Creek 6870 8.0 4.8 167 11.2 8.8 127
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Basin Index (%) 113 108
BELLE FOURCHE
Blind Park 6890 8.3 6.8 122 9.7 9.2 105
Cole Canyon 5910 7.8 5.1 153 9.0 7.4 122
North Rapid Creek 6130 7.2 6.2 116 7.8 7.4 105
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Basin Index (%) 129 110
CHEYENNE RIVER BASIN
Blind Park 6890 8.3 6.8 122 9.7 9.2 105
North Rapid Creek 6130 7.2 6.2 116 7.8 7.4 105
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Basin Index (%) 119 105
UPPER N. PLATTE
Arapaho Ridge 10976 21.0 18.3 115 20.2 18.4 110
Blackhall Mtn 9839 33.0 24.0 138 32.4 23.6 137
Cinnabar Park 9707 -M 18.2 * 20.7 20.6 100
Columbine 9167 24.6 20.7 119 22.6 20.7 109
Divide Peak 8730 24.7 16.9 146 23.1 18.2 127
Joe Wright 10158 20.4 18.0 113 22.4 22.0 102
Laprele Creek 8390 10.7 8.2 130 11.1 9.6 116
Med Bow 10512 35.0 -M * 30.2 -M *
Never Summer 10323 -M 17.1 * -M 14.4 *
North French Creek 10153 26.7 23.9 112 26.2 22.1 119
Old Battle 9860 35.2 25.8 136 30.4 28.4 107
Rawah 9069 12.3 9.6 128 13.9 13.1 106
Sage Creek Basin 7850 22.5 12.4 181 18.7 11.1 168
Sand Lake 10098 -M 22.4 * -M 20.5 *
South Brush Creek 8495 13.8 10.3 134 12.8 11.4 112
Tower 10620 43.6 37.8 115 38.7 34.3 113
Webber Springs 9260 25.7 18.8 137 27.4 21.2 129
Whiskey Park 9020 34.7 23.4 148 31.3 23.6 133
Willow Creek Pass 9523 14.2 11.0 129 14.2 11.5 123
Zirkel 9338 28.3 24.9 114 30.1 26.5 114
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Basin Index (%) 129 118
SWEETWATER
Deer Park 9700 20.5 11.4 180 20.8 14.4 144
Larsen Creek 9000 9.8 10.1 97 12.6 11.1 114
South Pass 9040 16.7 12.4 135 15.4 12.6 122
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Basin Index (%) 139 128
LOWER N. PLATTE
Casper Mtn. 7920 11.9 10.8 110 11.8 11.0 107
Laprele Creek 8390 10.7 8.2 130 11.1 9.6 116
Reno Hill 8430 13.1 11.4 115 14.4 11.9 121
Windy Peak 7915 9.9 6.7 148 10.5 8.0 131
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Basin Index (%) 123 118
LARAMIE RIVER
Brooklyn Lake 10250 22.5 17.2 131 22.5 18.2 124
Cinnabar Park 9707 -M 18.2 * 20.7 20.6 100
Crow Creek 8335 4.8 6.4 75 7.5 8.3 90
Deadman Hill 10239 16.6 14.3 116 15.4 14.4 107
Rawah 9069 12.3 9.6 128 13.9 13.1 106
Roach 9740 16.1 13.1 123 18.1 15.6 116
Windy Peak 7915 9.9 6.7 148 10.5 8.0 131
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Basin Index (%) 122 111
S. PLATTE
Crow Creek 8335 4.8 6.4 75 7.5 8.3 90
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Basin Index (%) 75 90
LITTLE SNAKE RIVER
Battle Mountain 7498 15.8 10.6 149 19.7 13.0 152
Divide Peak 8730 24.7 16.9 146 23.1 18.2 127
Elk River 8739 24.6 16.6 148 23.5 16.2 145
Elkhead Divide 8800 27.1 -M * 26.1 -M *
Little Snake River 8928 33.1 23.2 143 35.6 27.6 129
Old Battle 9860 35.2 25.8 136 30.4 28.4 107
Sage Creek Basin 7850 22.5 12.4 181 18.7 11.1 168
Sandstone RS 8152 21.0 11.6 181 21.8 15.8 138
Whiskey Park 9020 34.7 23.4 148 31.3 23.6 133
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Basin Index (%) 151 133
UPPER GREEN RIVER
Big Sandy Opening 9080 13.0 11.0 118 13.1 10.6 124
Blind Bull Sum 8650 21.1 20.8 101 14.5 15.8 92
East Rim Divide 7930 10.4 9.7 107 9.9 10.0 99
Elkhart Park G.S. 9400 10.3 10.4 99 9.6 10.8 89
Gros Ventre Summit 8750 9.8 10.6 92 9.0 10.2 88
Gunsight Pass 9820 11.1 11.1 100 10.5 11.9 88
Indian Creek 9425 23.7 20.2 117 20.3 17.1 119
Kendall R.S. 7740 10.6 10.8 98 11.0 11.6 95
Larsen Creek 9000 9.8 10.1 97 12.6 11.1 114
Loomis Park 8240 13.6 13.5 101 13.7 14.6 94
New Fork Lake 8340 9.6 9.3 103 -M 9.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 12.5 11.5 109 13.4 12.2 110
Spring Creek Divide 9000 22.9 21.0 109 16.4 20.6 80
Triple Peak 8500 21.1 21.0 100 21.5 22.2 97
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Basin Index (%) 104 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 11.5 7.4 155 12.2 10.1 121
Buck Pasture 9632 17.3 -M * 18.2 -M *
EF Blacks Fork GS 9360 12.3 10.0 123 9.7 9.4 103
Hams Fork 7840 13.2 10.0 132 12.1 9.4 129
Henrys Fork 10182 -M -M * 12.8 -M *
Hewinta 9500 11.0 8.7 126 13.7 11.0 125
Hickerson Park 9122 9.1 6.6 138 9.8 8.6 114
Hole-in-Rock 9168 7.9 6.2 127 9.2 8.3 111
Indian Creek 9425 23.7 20.2 117 20.3 17.1 119
Kelley R.S. 8180 17.5 12.8 137 18.0 14.2 127
Spirit Lk 10235 17.1 9.9 173 16.2 13.8 117
Steel Creek Park 10158 16.9 12.5 135 16.6 13.0 128
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Basin Index (%) 134 120
UPPER BEAR RIVER
Bear River RS 8777 12.3 8.0 154 13.6 9.7 140
Bug Lake 7987 24.6 16.4 150 20.0 15.2 132
Burts Miller Ranch 8000 8.6 5.7 151 12.1 6.2 195
Chalk Creek #1 9171 26.9 19.6 137 24.4 19.5 125
Giveout 6930 12.8 8.2 156 13.1 10.2 128
Hayden Fork 9130 18.4 13.0 142 22.8 17.4 131
Kelley R.S. 8180 17.5 12.8 137 18.0 14.2 127
Lily Lake 9133 13.3 11.0 121 14.8 13.4 110
Monte Cristo 8932 32.6 22.8 143 28.8 21.7 133
Salt River Summit 7640 16.6 11.6 143 15.9 13.4 119
Spring Creek Divide 9000 22.9 21.0 109 16.4 20.6 80
Trial Lake 9992 29.9 19.2 156 29.2 18.8 155
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Basin Index (%) 140 127
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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.
