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: JANUARY 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 8.4 7.4 114 9.3 9.9 94
Blind Bull Sum 8650 10.6 9.6 110 7.4 8.4 88
Cottonwood Creek 7670 10.2 8.7 117 10.8 10.9 99
East Rim Divide 7930 5.0 4.4 114 5.1 5.4 94
Grand Targhee 9260 20.9 19.8 106 13.1 16.0 82
Granite Creek 6770 7.7 6.5 118 7.2 8.9 81
Grassy Lake 7265 14.5 12.3 118 17.8 16.4 109
Gros Ventre Summit 8750 6.2 6.3 98 5.8 6.0 97
Gunsight Pass 9820 6.3 6.0 105 6.3 6.8 93
Lewis Lake Divide 7850 17.5 12.8 137 19.9 16.0 124
Loomis Park 8240 7.2 6.6 109 7.4 7.7 96
Phillips Bench 8200 13.3 10.6 125 13.8 12.6 110
Salt River Summit 7640 7.3 5.0 146 7.4 7.2 103
Snake River Station 6920 9.4 6.9 136 11.6 10.7 108
Somsen Ranch 6800 8.1 4.8 169 9.5 8.2 116
Spring Creek Divide 9000 11.1 10.2 109 11.3 10.4 109
Thumb Divide 7980 10.9 6.4 170 10.5 8.4 125
Togwotee Pass 9580 10.9 10.8 101 10.9 11.4 96
Triple Peak 8500 11.5 8.8 131 11.7 10.8 108
Two Ocean Plateau 9240 16.5 13.4 123 13.1 12.4 106
Willow Creek 8080 14.7 11.1 132 15.2 15.0 101
Younts Peak 8350 8.1 6.8 119 7.2 7.2 100
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Basin Index (%) 121 102
MADISON HEADWATERS IN WYOMING
Black Bear 8170 21.0 16.4 128 21.3 17.9 119
Canyon 7870 7.6 -M * 9.3 -M *
Madison Plateau 7750 14.6 10.0 146 15.6 11.8 132
West Yellowstone 6700 8.1 4.6 176 10.7 7.4 145
Whiskey Creek 6800 10.2 6.2 165 13.5 9.4 144
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Basin Index (%) 145 131
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 -M 10.0 * -M 9.3 *
Canyon 7870 7.6 -M * 9.3 -M *
Evening Star 9200 13.0 12.4 105 15.2 14.5 105
Fisher Creek 9100 17.7 15.7 113 18.7 15.8 118
Monument Peak 8850 10.6 9.0 118 12.8 10.8 119
Northeast Entrance 7350 4.8 4.0 120 7.1 6.4 111
Parker Peak 9400 11.8 10.6 111 11.5 10.0 115
Sylvan Lake 8420 9.5 9.0 106 11.9 11.9 100
Thumb Divide 7980 10.9 6.4 170 10.5 8.4 125
Two Ocean Plateau 9240 16.5 13.4 123 13.1 12.4 106
White Mill 8700 12.5 10.5 119 12.4 11.2 111
Wolverine 7650 6.2 5.4 115 6.7 6.2 108
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Basin Index (%) 118 111
WIND RIVER
Burroughs Creek 8750 5.1 -M * 5.9 -M *
Castle Creek 8400 3.1 3.3 94 3.8 4.4 86
Cold Springs 9630 4.0 3.6 111 5.1 5.0 102
Deer Park 9700 11.4 6.2 184 11.7 8.4 139
Hobbs Park 10100 7.9 6.2 127 7.2 6.2 116
Kirwin 9550 4.6 5.6 82 6.2 6.2 100
Little Warm 9370 5.0 4.4 114 5.9 6.1 97
South Pass 9040 8.6 6.0 143 7.9 7.0 113
St. Lawrence Alt 8620 3.0 -M * 4.8 -M *
Togwotee Pass 9580 10.9 10.8 101 10.9 11.4 96
Townsend Creek 8700 4.6 4.2 110 5.4 5.6 96
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Basin Index (%) 119 106
BIGHORN BASIN
Bald Mtn. 9380 8.4 8.8 95 7.1 7.8 91
Bear Trap Meadow 8200 3.8 2.9 131 4.6 4.2 110
Bone Springs Div 9350 5.6 7.5 75 5.6 7.3 77
Grave Springs 8550 4.6 3.2 144 5.0 4.6 109
Kirwin 9550 4.6 5.6 82 6.2 6.2 100
Marquette 8760 3.1 3.5 89 3.9 4.8 81
Middle Powder 7760 5.8 4.4 132 5.1 5.0 102
Owl Creek 8975 3.4 2.6 131 4.0 3.4 118
Powder River Pass 9480 4.8 5.2 92 6.2 6.2 100
Shell Creek 9580 5.7 7.3 78 6.5 6.7 97
Timber Creek 7950 2.1 2.3 91 2.5 4.2 60
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Basin Index (%) 97 94
SHOSHONE RIVER
Blackwater 9780 10.8 11.0 98 10.7 10.6 101
Evening Star 9200 13.0 12.4 105 15.2 14.5 105
Marquette 8760 3.1 3.5 89 3.9 4.8 81
Sylvan Lake 8420 9.5 9.0 106 11.9 11.9 100
Sylvan Road 7120 5.4 5.8 93 7.9 9.0 88
Younts Peak 8350 8.1 6.8 119 7.2 7.2 100
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Basin Index (%) 103 98
POWDER RIVER
Bear Trap Meadow 8200 3.8 2.9 131 4.6 4.2 110
Cloud Peak Reservoir 9860 6.5 6.4 102 6.6 6.4 103
Grave Springs 8550 4.6 3.2 144 5.0 4.6 109
Hansen Sawmill 8360 3.4 3.1 110 3.8 4.2 90
Middle Powder 7760 5.8 4.4 132 5.1 5.0 102
Powder River Pass 9480 4.8 5.2 92 6.2 6.2 100
Soldier Park 8720 1.8 2.4 75 3.3 4.5 73
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Basin Index (%) 111 99
TONGUE RIVER
Big Goose 7990 4.3 3.6 119 5.1 5.0 102
Bone Springs Div 9350 5.6 7.5 75 5.6 7.3 77
Burgess Junction 7880 5.8 4.8 121 7.2 5.8 124
Dome Lake 8880 3.7 4.8 77 5.6 5.8 97
Little Goose 8870 4.7 4.5 104 5.6 5.7 98
Sucker Creek 8880 5.9 5.3 111 8.0 6.2 129
Tie Creek 6870 3.4 2.0 170 6.1 5.2 117
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Basin Index (%) 103 105
BELLE FOURCHE
Blind Park 6890 3.4 3.2 106 4.9 4.9 100
Cole Canyon 5910 2.7 2.5 108 3.9 4.1 95
North Rapid Creek 6130 3.5 3.2 109 4.1 3.8 108
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Basin Index (%) 108 101
CHEYENNE RIVER BASIN
Blind Park 6890 3.4 3.2 106 4.9 4.9 100
North Rapid Creek 6130 3.5 3.2 109 4.1 3.8 108
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Basin Index (%) 108 103
UPPER N. PLATTE
Arapaho Ridge 10976 11.2 10.0 112 11.3 10.2 111
Blackhall Mtn 9839 14.3 12.3 116 15.3 13.7 112
Cinnabar Park 9707 -M 9.2 * 10.0 11.0 91
Columbine 9167 11.4 8.8 130 11.8 10.6 111
Divide Peak 8730 9.5 7.6 125 11.5 9.9 116
Joe Wright 10158 11.0 8.5 129 13.6 11.4 119
Laprele Creek 8390 3.8 3.7 103 4.0 5.4 74
Med Bow 10512 14.9 -M * 14.7 -M *
Never Summer 10323 11.6 8.4 138 8.3 8.2 101
North French Creek 10153 11.8 11.6 102 11.9 12.0 99
Old Battle 9860 14.2 12.4 115 16.2 14.8 109
Rawah 9069 8.0 4.8 167 8.9 7.6 117
Sage Creek Basin 7850 8.2 5.7 144 9.4 6.7 140
Sand Lake 10098 11.0 11.4 96 11.2 10.8 104
South Brush Creek 8495 7.0 4.7 149 6.4 6.0 107
Tower 10620 20.6 16.8 123 20.5 17.0 121
Webber Springs 9260 10.5 9.2 114 11.5 11.4 101
Whiskey Park 9020 15.4 9.8 157 15.5 12.5 124
Willow Creek Pass 9523 7.6 5.8 131 8.5 6.6 129
Zirkel 9338 11.9 10.6 112 14.1 13.2 107
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Basin Index (%) 123 111
SWEETWATER
Deer Park 9700 11.4 6.2 184 11.7 8.4 139
Larsen Creek 9000 4.6 2.9 159 6.8 5.8 117
South Pass 9040 8.6 6.0 143 7.9 7.0 113
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Basin Index (%) 163 125
LOWER N. PLATTE
Casper Mtn. 7920 4.4 5.4 81 4.5 6.6 68
Laprele Creek 8390 3.8 3.7 103 4.0 5.4 74
Reno Hill 8430 5.7 5.8 98 7.1 6.6 108
Windy Peak 7915 2.7 3.0 90 3.4 4.7 72
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Basin Index (%) 93 82
LARAMIE RIVER
Brooklyn Lake 10250 9.4 8.4 112 10.5 8.9 118
Cinnabar Park 9707 -M 9.2 * 10.0 11.0 91
Crow Creek 8335 1.7 3.8 45 3.7 5.2 71
Deadman Hill 10239 8.1 7.7 105 7.6 8.0 95
Rawah 9069 8.0 4.8 167 8.9 7.6 117
Roach 9740 7.7 6.6 117 8.8 8.9 99
Windy Peak 7915 2.7 3.0 90 3.4 4.7 72
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Basin Index (%) 110 97
S. PLATTE
Crow Creek 8335 1.7 3.8 45 3.7 5.2 71
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Basin Index (%) 45 71
LITTLE SNAKE RIVER
Battle Mountain 7498 8.1 4.3 188 11.0 6.6 167
Divide Peak 8730 9.5 7.6 125 11.5 9.9 116
Elk River 8739 11.2 7.0 160 11.0 8.6 128
Elkhead Divide 8800 12.4 -M * 13.1 -M *
Little Snake River 8928 13.4 10.4 129 17.6 15.1 117
Old Battle 9860 14.2 12.4 115 16.2 14.8 109
Sage Creek Basin 7850 8.2 5.7 144 9.4 6.7 140
Sandstone RS 8152 9.3 5.0 186 11.0 8.0 138
Whiskey Park 9020 15.4 9.8 157 15.5 12.5 124
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Basin Index (%) 144 126
UPPER GREEN RIVER
Big Sandy Opening 9080 6.9 6.0 115 6.8 6.0 113
Blind Bull Sum 8650 10.6 9.6 110 7.4 8.4 88
East Rim Divide 7930 5.0 4.4 114 5.1 5.4 94
Elkhart Park G.S. 9400 5.8 5.8 100 5.2 6.4 81
Gros Ventre Summit 8750 6.2 6.3 98 5.8 6.0 97
Gunsight Pass 9820 6.3 6.0 105 6.3 6.8 93
Indian Creek 9425 11.4 10.0 114 9.6 9.3 103
Kendall R.S. 7740 5.6 5.2 108 5.9 6.8 87
Larsen Creek 9000 4.6 2.9 159 6.8 5.8 117
Loomis Park 8240 7.2 6.6 109 7.4 7.7 96
New Fork Lake 8340 5.2 4.6 113 -M 5.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 5.5 5.1 108 6.7 6.5 103
Spring Creek Divide 9000 11.1 10.2 109 11.3 10.4 109
Triple Peak 8500 11.5 8.8 131 11.7 10.8 108
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Basin Index (%) 112 100
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.8 3.2 212 7.0 5.8 121
Buck Pasture 9632 8.8 -M * 9.9 -M *
EF Blacks Fork GS 9360 8.2 4.0 205 5.8 5.2 112
Hams Fork 7840 5.9 4.6 128 5.4 5.2 104
Henrys Fork 10182 -M -M * 6.8 -M *
Hewinta 9500 5.6 3.9 144 7.6 6.6 115
Hickerson Park 9122 4.5 3.0 150 5.4 4.9 110
Hole-in-Rock 9168 3.4 3.0 113 5.2 4.9 106
Indian Creek 9425 11.4 10.0 114 9.6 9.3 103
Kelley R.S. 8180 8.4 6.0 140 8.6 7.8 110
Spirit Lk 10235 8.6 5.1 169 8.5 7.8 109
Steel Creek Park 10158 9.4 6.1 154 9.4 7.4 127
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Basin Index (%) 148 112
UPPER BEAR RIVER
Bear River RS 8777 6.1 3.7 165 7.2 5.4 133
Bug Lake 7987 10.6 6.5 163 9.1 8.0 114
Burts Miller Ranch 8000 5.0 2.3 217 7.6 3.7 205
Chalk Creek #1 9171 12.6 9.0 140 13.1 10.3 127
Giveout 6930 5.0 3.4 147 6.3 5.8 109
Hayden Fork 9130 7.8 5.6 139 11.1 8.9 125
Kelley R.S. 8180 8.4 6.0 140 8.6 7.8 110
Lily Lake 9133 7.7 4.8 160 7.8 7.2 108
Monte Cristo 8932 14.9 9.8 152 15.0 11.2 134
Salt River Summit 7640 7.3 5.0 146 7.4 7.2 103
Spring Creek Divide 9000 11.1 10.2 109 11.3 10.4 109
Trial Lake 9992 13.4 8.4 160 14.0 9.8 143
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Basin Index (%) 147 124
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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.
