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 15 , 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 16.1 16.0 101 17.6 18.0 98
Blind Bull Sum 8650 22.0 21.2 104 14.9 16.1 93
Cottonwood Creek 7670 21.5 19.2 112 22.6 22.0 103
East Rim Divide 7930 10.6 9.8 108 10.2 10.1 101
Grand Targhee 9260 38.3 35.7 107 22.4 27.0 83
Granite Creek 6770 15.6 15.4 101 13.3 16.6 80
Grassy Lake 7265 30.7 28.4 108 33.9 31.5 108
Gros Ventre Summit 8750 10.6 10.8 98 9.6 10.5 91
Gunsight Pass 9820 11.4 11.7 97 11.0 12.2 90
Lewis Lake Divide 7850 32.2 26.9 120 30.8 28.6 108
Loomis Park 8240 14.1 13.6 104 14.1 14.8 95
Phillips Bench 8200 26.6 22.6 118 25.5 23.4 109
Salt River Summit 7640 17.1 11.6 147 16.4 13.4 122
Snake River Station 6920 17.9 15.6 115 20.2 19.2 105
Somsen Ranch 6800 17.2 11.7 147 18.2 14.5 126
Spring Creek Divide 9000 23.6 21.4 110 -M 21.0 *
Thumb Divide 7980 18.5 14.1 131 17.2 15.0 115
Togwotee Pass 9580 19.6 21.0 93 18.0 22.2 81
Triple Peak 8500 21.5 21.3 101 22.1 22.7 97
Two Ocean Plateau 9240 27.7 25.4 109 21.1 23.1 91
Willow Creek 8080 31.2 26.4 118 29.9 28.8 104
Younts Peak 8350 15.0 13.2 114 12.2 13.0 94
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Basin Index (%) 111 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 39.4 33.0 119 36.7 32.4 113
Canyon 7870 13.0 -M * 15.2 -M *
Madison Plateau 7750 26.4 20.2 131 25.8 21.7 119
West Yellowstone 6700 15.0 10.0 150 17.4 12.8 136
Whiskey Creek 6800 19.0 14.2 134 23.3 17.2 135
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Basin Index (%) 129 123
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 16.6 19.4 86 15.3 17.7 86
Canyon 7870 13.0 -M * 15.2 -M *
Evening Star 9200 23.6 23.0 103 25.4 25.4 100
Fisher Creek 9100 31.0 28.2 110 31.5 28.1 112
Monument Peak 8850 19.2 18.2 105 21.3 18.6 115
Northeast Entrance 7350 9.4 9.4 100 11.4 11.6 98
Parker Peak 9400 20.8 18.6 112 20.5 17.8 115
Sylvan Lake 8420 17.6 17.4 101 20.1 20.1 100
Thumb Divide 7980 18.5 14.1 131 17.2 15.0 115
Two Ocean Plateau 9240 27.7 25.4 109 21.1 23.1 91
White Mill 8700 22.4 21.2 106 21.1 20.6 102
Wolverine 7650 12.5 10.8 116 11.5 11.0 105
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Basin Index (%) 107 104
WIND RIVER
Burroughs Creek 8750 9.7 -M * 9.4 -M *
Castle Creek 8400 5.4 6.8 79 6.0 7.6 79
Cold Springs 9630 7.2 6.4 112 8.5 7.5 113
Deer Park 9700 20.8 11.7 178 21.2 14.8 143
Hobbs Park 10100 13.3 11.4 117 12.5 10.4 120
Kirwin 9550 8.9 9.3 96 11.0 10.0 110
Little Warm 9370 9.0 8.9 101 10.3 10.6 97
South Pass 9040 16.8 12.6 133 16.2 12.6 129
St. Lawrence Alt 8620 6.2 -M * 8.4 -M *
Togwotee Pass 9580 19.6 21.0 93 18.0 22.2 81
Townsend Creek 8700 10.1 7.8 129 11.1 8.9 125
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Basin Index (%) 116 110
BIGHORN BASIN
Bald Mtn. 9380 16.2 16.0 101 13.2 13.7 96
Bear Trap Meadow 8200 8.0 5.7 140 8.1 6.8 119
Bone Springs Div 9350 13.1 13.8 95 10.5 12.9 81
Grave Springs 8550 8.9 7.4 120 9.2 8.0 115
Kirwin 9550 8.9 9.3 96 11.0 10.0 110
Marquette 8760 6.4 6.0 107 7.0 7.2 97
Middle Powder 7760 9.7 8.9 109 8.6 8.6 100
Owl Creek 8975 6.0 4.6 130 6.7 5.0 134
Powder River Pass 9480 9.6 9.5 101 12.0 10.6 113
Shell Creek 9580 11.9 12.7 94 12.2 11.6 105
Timber Creek 7950 4.4 4.4 100 5.2 6.3 83
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Basin Index (%) 105 103
SHOSHONE RIVER
Blackwater 9780 18.3 19.9 92 18.7 18.8 99
Evening Star 9200 23.6 23.0 103 25.4 25.4 100
Marquette 8760 6.4 6.0 107 7.0 7.2 97
Sylvan Lake 8420 17.6 17.4 101 20.1 20.1 100
Sylvan Road 7120 9.9 10.7 93 13.4 14.8 91
Younts Peak 8350 15.0 13.2 114 12.2 13.0 94
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Basin Index (%) 101 97
POWDER RIVER
Bear Trap Meadow 8200 8.0 5.7 140 8.1 6.8 119
Cloud Peak Reservoir 9860 12.4 12.4 100 12.1 11.0 110
Grave Springs 8550 8.9 7.4 120 9.2 8.0 115
Hansen Sawmill 8360 7.3 5.8 126 7.5 7.2 104
Middle Powder 7760 9.7 8.9 109 8.6 8.6 100
Powder River Pass 9480 9.6 9.5 101 12.0 10.6 113
Soldier Park 8720 7.3 6.0 122 6.9 7.8 88
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Basin Index (%) 113 107
TONGUE RIVER
Big Goose 7990 8.6 7.0 123 9.1 8.4 108
Bone Springs Div 9350 13.1 13.8 95 10.5 12.9 81
Burgess Junction 7880 10.8 9.2 117 12.1 10.0 121
Dome Lake 8880 9.9 9.7 102 10.2 10.4 98
Little Goose 8870 9.3 8.2 113 10.2 9.8 104
Sucker Creek 8880 11.9 10.4 114 14.2 11.8 120
Tie Creek 6870 8.2 4.8 171 11.3 9.0 126
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Basin Index (%) 114 107
BELLE FOURCHE
Blind Park 6890 7.9 7.1 111 9.9 9.4 105
Cole Canyon 5910 8.0 5.2 154 9.4 7.5 125
North Rapid Creek 6130 7.2 6.5 111 7.8 7.8 100
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Basin Index (%) 123 110
CHEYENNE RIVER BASIN
Blind Park 6890 7.9 7.1 111 9.9 9.4 105
North Rapid Creek 6130 7.2 6.5 111 7.8 7.8 100
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Basin Index (%) 111 103
UPPER N. PLATTE
Arapaho Ridge 10976 21.2 18.6 114 20.2 18.8 107
Blackhall Mtn 9839 33.3 24.5 136 32.6 24.2 135
Cinnabar Park 9707 -M 18.4 * 21.0 20.9 100
Columbine 9167 25.2 20.6 122 23.1 20.9 111
Divide Peak 8730 24.9 17.0 146 25.6 18.2 141
Joe Wright 10158 20.6 18.0 114 22.5 22.3 101
Laprele Creek 8390 10.8 8.4 129 11.2 9.8 114
Med Bow 10512 35.3 -M * 30.4 -M *
Never Summer 10323 -M 17.2 * -M 14.5 *
North French Creek 10153 27.0 24.0 112 26.4 22.2 119
Old Battle 9860 35.5 26.0 137 30.7 28.5 108
Rawah 9069 12.5 9.6 130 13.9 13.2 105
Sage Creek Basin 7850 22.8 12.5 182 18.8 11.2 168
Sand Lake 10098 25.6 22.4 114 24.5 20.5 120
South Brush Creek 8495 13.9 10.4 134 12.9 11.6 111
Tower 10620 44.1 37.8 117 38.9 34.8 112
Webber Springs 9260 26.1 19.0 137 28.0 21.5 130
Whiskey Park 9020 35.8 24.2 148 31.5 24.0 131
Willow Creek Pass 9523 14.4 11.0 131 14.4 11.6 124
Zirkel 9338 28.8 25.1 115 30.4 26.6 114
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Basin Index (%) 128 118
SWEETWATER
Deer Park 9700 20.8 11.7 178 21.2 14.8 143
Larsen Creek 9000 10.3 10.2 101 13.0 11.2 116
South Pass 9040 16.8 12.6 133 16.2 12.6 129
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Basin Index (%) 139 131
LOWER N. PLATTE
Casper Mtn. 7920 11.8 11.0 107 11.8 11.1 106
Laprele Creek 8390 10.8 8.4 129 11.2 9.8 114
Reno Hill 8430 13.4 11.6 116 14.6 11.9 123
Windy Peak 7915 10.2 6.7 152 10.8 8.1 133
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Basin Index (%) 123 118
LARAMIE RIVER
Brooklyn Lake 10250 22.7 17.6 129 22.7 18.2 125
Cinnabar Park 9707 -M 18.4 * 21.0 20.9 100
Crow Creek 8335 4.9 6.3 78 7.7 8.6 90
Deadman Hill 10239 16.8 14.4 117 15.5 14.6 106
Rawah 9069 12.5 9.6 130 13.9 13.2 105
Roach 9740 16.3 13.4 122 18.3 15.6 117
Windy Peak 7915 10.2 6.7 152 10.8 8.1 133
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Basin Index (%) 123 111
S. PLATTE
Crow Creek 8335 4.9 6.3 78 7.7 8.6 90
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Basin Index (%) 78 90
LITTLE SNAKE RIVER
Battle Mountain 7498 16.0 10.7 150 19.9 13.0 153
Divide Peak 8730 24.9 17.0 146 25.6 18.2 141
Elk River 8739 25.0 16.4 152 23.6 16.2 146
Elkhead Divide 8800 27.4 -M * 26.2 -M *
Little Snake River 8928 33.5 23.6 142 36.4 27.7 131
Old Battle 9860 35.5 26.0 137 30.7 28.5 108
Sage Creek Basin 7850 22.8 12.5 182 18.8 11.2 168
Sandstone RS 8152 21.2 11.3 188 22.0 15.8 139
Whiskey Park 9020 35.8 24.2 148 31.5 24.0 131
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Basin Index (%) 152 135
UPPER GREEN RIVER
Big Sandy Opening 9080 13.6 11.4 119 13.6 10.9 125
Blind Bull Sum 8650 22.0 21.2 104 14.9 16.1 93
East Rim Divide 7930 10.6 9.8 108 10.2 10.1 101
Elkhart Park G.S. 9400 10.8 10.8 100 10.1 10.9 93
Gros Ventre Summit 8750 10.6 10.8 98 9.6 10.5 91
Gunsight Pass 9820 11.4 11.7 97 11.0 12.2 90
Indian Creek 9425 24.3 20.4 119 20.8 17.2 121
Kendall R.S. 7740 11.2 10.8 104 11.3 11.8 96
Larsen Creek 9000 10.3 10.2 101 13.0 11.2 116
Loomis Park 8240 14.1 13.6 104 14.1 14.8 95
New Fork Lake 8340 9.9 9.4 105 -M 9.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 13.0 11.8 110 13.8 12.4 111
Spring Creek Divide 9000 23.6 21.4 110 -M 21.0 *
Triple Peak 8500 21.5 21.3 101 22.1 22.7 97
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Basin Index (%) 106 102
LOWER GREEN RIVER
Blacks Fork Jct 8869 11.8 7.6 155 12.4 10.4 119
Buck Pasture 9632 17.6 -M * 18.7 -M *
EF Blacks Fork GS 9360 12.6 10.2 124 9.8 9.6 102
Hams Fork 7840 13.7 10.2 134 12.4 9.4 132
Henrys Fork 10182 -M -M * 12.8 -M *
Hewinta 9500 11.0 8.8 125 13.9 11.1 125
Hickerson Park 9122 9.3 6.8 137 9.8 8.7 113
Hole-in-Rock 9168 8.4 6.3 133 9.6 8.4 114
Indian Creek 9425 24.3 20.4 119 20.8 17.2 121
Kelley R.S. 8180 17.9 12.9 139 18.4 14.3 129
Spirit Lk 10235 17.6 10.4 169 16.6 14.3 116
Steel Creek Park 10158 17.1 12.6 136 16.8 13.0 129
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Basin Index (%) 135 121
UPPER BEAR RIVER
Bear River RS 8777 12.4 8.2 151 13.7 9.9 138
Bug Lake 7987 24.9 16.4 152 20.5 15.4 133
Burts Miller Ranch 8000 8.8 5.2 169 12.3 6.4 192
Chalk Creek #1 9171 27.0 19.8 136 26.0 20.3 128
Giveout 6930 13.3 8.2 162 13.5 10.3 131
Hayden Fork 9130 18.8 13.0 145 23.0 17.4 132
Kelley R.S. 8180 17.9 12.9 139 18.4 14.3 129
Lily Lake 9133 13.4 11.4 118 14.9 13.6 110
Monte Cristo 8932 33.5 23.2 144 -M 21.9 *
Salt River Summit 7640 17.1 11.6 147 16.4 13.4 122
Spring Creek Divide 9000 23.6 21.4 110 -M 21.0 *
Trial Lake 9992 30.7 19.3 159 29.5 19.2 154
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Basin Index (%) 142 134
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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.
