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: JANUARY 4 , 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 7.8 108 9.3 10.4 89
Blind Bull Sum 8650 11.1 9.8 113 7.8 8.6 91
Cottonwood Creek 7670 10.5 8.8 119 11.3 11.1 102
East Rim Divide 7930 5.4 4.6 117 5.4 5.4 100
Grand Targhee 9260 21.1 20.2 104 13.3 16.3 82
Granite Creek 6770 7.8 6.8 115 7.3 9.2 79
Grassy Lake 7265 14.6 12.9 113 17.9 16.6 108
Gros Ventre Summit 8750 6.5 6.4 102 6.2 6.4 97
Gunsight Pass 9820 6.5 6.2 105 6.3 7.0 90
Lewis Lake Divide 7850 17.6 13.2 133 19.9 16.4 121
Loomis Park 8240 7.6 6.8 112 7.7 7.8 99
Phillips Bench 8200 13.4 11.0 122 13.9 12.7 109
Salt River Summit 7640 7.8 5.0 156 7.8 7.2 108
Snake River Station 6920 9.5 7.2 132 11.6 11.1 105
Somsen Ranch 6800 8.3 4.9 169 9.7 8.3 117
Spring Creek Divide 9000 11.7 10.3 114 12.1 10.9 111
Thumb Divide 7980 10.9 6.5 168 10.5 8.7 121
Togwotee Pass 9580 11.3 11.5 98 11.2 11.8 95
Triple Peak 8500 12.2 9.0 136 12.2 11.0 111
Two Ocean Plateau 9240 16.5 13.8 120 13.1 13.2 99
Willow Creek 8080 15.3 11.4 134 15.7 15.4 102
Younts Peak 8350 8.3 7.0 119 7.4 7.4 100
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Basin Index (%) 120 102
MADISON HEADWATERS IN WYOMING
Black Bear 8170 21.1 17.0 124 21.4 18.6 115
Canyon 7870 7.6 -M * 9.3 -M *
Madison Plateau 7750 14.6 10.2 143 15.7 12.2 129
West Yellowstone 6700 8.1 4.8 169 10.7 7.4 145
Whiskey Creek 6800 10.2 6.4 159 13.6 9.7 140
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Basin Index (%) 141 128
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 -M 10.8 * -M 9.9 *
Canyon 7870 7.6 -M * 9.3 -M *
Evening Star 9200 13.2 13.2 100 15.2 14.9 102
Fisher Creek 9100 17.8 16.0 111 18.7 16.4 114
Monument Peak 8850 10.6 9.3 114 12.8 11.1 115
Northeast Entrance 7350 4.9 4.4 111 7.2 6.6 109
Parker Peak 9400 11.8 10.8 109 12.2 10.4 117
Sylvan Lake 8420 9.5 9.4 101 12.3 12.2 101
Thumb Divide 7980 10.9 6.5 168 10.5 8.7 121
Two Ocean Plateau 9240 16.5 13.8 120 13.1 13.2 99
White Mill 8700 12.5 11.2 112 12.4 11.8 105
Wolverine 7650 6.1 5.6 109 6.7 6.4 105
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Basin Index (%) 114 108
WIND RIVER
Burroughs Creek 8750 5.5 -M * 6.3 -M *
Castle Creek 8400 3.2 3.4 94 3.7 4.6 80
Cold Springs 9630 4.6 4.0 115 5.8 5.0 116
Deer Park 9700 12.9 6.0 215 13.0 8.4 155
Hobbs Park 10100 8.8 6.8 129 8.2 6.4 128
Kirwin 9550 4.8 5.8 83 6.5 6.3 103
Little Warm 9370 5.3 4.6 115 6.1 6.2 98
South Pass 9040 10.0 6.4 156 9.4 7.2 131
St. Lawrence Alt 8620 3.8 -M * 5.6 -M *
Togwotee Pass 9580 11.3 11.5 98 11.2 11.8 95
Townsend Creek 8700 6.1 4.2 145 6.9 5.8 119
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Basin Index (%) 127 115
BIGHORN BASIN
Bald Mtn. 9380 8.5 9.0 94 7.1 8.0 89
Bear Trap Meadow 8200 4.3 3.0 143 5.1 4.4 116
Bone Springs Div 9350 5.6 7.6 74 5.7 7.4 77
Grave Springs 8550 5.2 3.7 141 5.6 4.6 122
Kirwin 9550 4.8 5.8 83 6.5 6.3 103
Marquette 8760 3.5 3.6 97 4.3 5.0 86
Middle Powder 7760 6.2 4.5 138 5.5 5.2 106
Owl Creek 8975 3.8 2.7 141 4.4 3.4 129
Powder River Pass 9480 4.9 5.2 94 6.4 6.6 97
Shell Creek 9580 5.8 7.4 78 6.6 7.0 94
Timber Creek 7950 2.6 2.4 108 3.0 4.2 71
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Basin Index (%) 101 97
SHOSHONE RIVER
Blackwater 9780 10.9 11.6 94 10.7 11.2 96
Evening Star 9200 13.2 13.2 100 15.2 14.9 102
Marquette 8760 3.5 3.6 97 4.3 5.0 86
Sylvan Lake 8420 9.5 9.4 101 12.3 12.2 101
Sylvan Road 7120 5.4 6.0 90 7.9 9.2 86
Younts Peak 8350 8.3 7.0 119 7.4 7.4 100
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Basin Index (%) 100 96
POWDER RIVER
Bear Trap Meadow 8200 4.3 3.0 143 5.1 4.4 116
Cloud Peak Reservoir 9860 6.8 6.6 103 6.8 6.6 103
Grave Springs 8550 5.2 3.7 141 5.6 4.6 122
Hansen Sawmill 8360 3.7 3.4 109 4.1 4.2 98
Middle Powder 7760 6.2 4.5 138 5.5 5.2 106
Powder River Pass 9480 4.9 5.2 94 6.4 6.6 97
Soldier Park 8720 1.9 2.6 73 3.3 4.6 72
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Basin Index (%) 114 102
TONGUE RIVER
Big Goose 7990 4.4 3.6 122 5.2 5.2 100
Bone Springs Div 9350 5.6 7.6 74 5.7 7.4 77
Burgess Junction 7880 5.8 4.9 118 7.3 5.9 124
Dome Lake 8880 3.9 5.0 78 5.7 6.1 93
Little Goose 8870 4.7 4.6 102 5.7 6.0 95
Sucker Creek 8880 6.0 5.4 111 8.0 6.4 125
Tie Creek 6870 3.4 2.2 155 6.1 5.4 113
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Basin Index (%) 102 103
BELLE FOURCHE
Blind Park 6890 3.6 3.2 112 5.0 5.1 98
Cole Canyon 5910 3.0 2.6 115 4.2 4.2 100
North Rapid Creek 6130 3.6 3.4 106 4.3 3.9 110
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Basin Index (%) 111 102
CHEYENNE RIVER BASIN
Blind Park 6890 3.6 3.2 112 5.0 5.1 98
North Rapid Creek 6130 3.6 3.4 106 4.3 3.9 110
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Basin Index (%) 109 103
UPPER N. PLATTE
Arapaho Ridge 10976 11.8 10.4 113 12.0 10.6 113
Blackhall Mtn 9839 15.3 12.7 120 16.3 14.4 113
Cinnabar Park 9707 -M 9.4 * 10.7 11.3 95
Columbine 9167 11.9 9.2 129 12.2 11.0 111
Divide Peak 8730 10.6 7.9 134 12.7 10.2 125
Joe Wright 10158 11.4 9.0 127 14.2 11.8 120
Laprele Creek 8390 4.4 3.8 116 4.7 5.5 85
Med Bow 10512 16.0 -M * 15.6 -M *
Never Summer 10323 12.5 8.6 145 8.8 8.4 105
North French Creek 10153 12.6 12.0 105 12.7 12.4 102
Old Battle 9860 16.1 13.1 123 17.8 15.4 116
Rawah 9069 8.1 5.2 156 9.2 7.8 118
Sage Creek Basin 7850 9.7 5.9 164 10.3 6.9 149
Sand Lake 10098 11.4 12.0 95 11.6 11.3 103
South Brush Creek 8495 7.3 4.9 149 6.7 6.2 108
Tower 10620 22.0 17.0 129 21.8 17.9 122
Webber Springs 9260 11.9 9.3 128 13.0 12.0 108
Whiskey Park 9020 16.6 10.0 166 16.5 13.0 127
Willow Creek Pass 9523 8.1 6.0 135 8.8 6.6 133
Zirkel 9338 12.4 10.8 115 14.8 14.3 103
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Basin Index (%) 128 113
SWEETWATER
Deer Park 9700 12.9 6.0 215 13.0 8.4 155
Larsen Creek 9000 4.6 2.9 159 7.0 5.8 121
South Pass 9040 10.0 6.4 156 9.4 7.2 131
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Basin Index (%) 180 137
LOWER N. PLATTE
Casper Mtn. 7920 5.6 5.6 100 5.5 6.6 83
Laprele Creek 8390 4.4 3.8 116 4.7 5.5 85
Reno Hill 8430 6.4 6.1 105 7.8 6.6 118
Windy Peak 7915 3.5 3.2 109 4.5 4.9 92
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Basin Index (%) 106 95
LARAMIE RIVER
Brooklyn Lake 10250 10.4 9.1 114 11.2 9.4 119
Cinnabar Park 9707 -M 9.4 * 10.7 11.3 95
Crow Creek 8335 2.0 3.9 51 4.0 5.6 71
Deadman Hill 10239 8.5 7.9 108 7.9 8.2 96
Rawah 9069 8.1 5.2 156 9.2 7.8 118
Roach 9740 8.5 6.8 125 9.8 9.2 107
Windy Peak 7915 3.5 3.2 109 4.5 4.9 92
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Basin Index (%) 114 102
S. PLATTE
Crow Creek 8335 2.0 3.9 51 4.0 5.6 71
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Basin Index (%) 51 71
LITTLE SNAKE RIVER
Battle Mountain 7498 8.7 4.6 189 11.7 7.4 158
Divide Peak 8730 10.6 7.9 134 12.7 10.2 125
Elk River 8739 12.7 7.2 176 12.2 8.7 140
Elkhead Divide 8800 13.9 -M * 14.3 -M *
Little Snake River 8928 15.4 10.8 143 19.2 15.9 121
Old Battle 9860 16.1 13.1 123 17.8 15.4 116
Sage Creek Basin 7850 9.7 5.9 164 10.3 6.9 149
Sandstone RS 8152 10.6 5.2 204 12.2 8.4 145
Whiskey Park 9020 16.6 10.0 166 16.5 13.0 127
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Basin Index (%) 155 131
UPPER GREEN RIVER
Big Sandy Opening 9080 7.1 6.4 111 7.0 6.4 109
Blind Bull Sum 8650 11.1 9.8 113 7.8 8.6 91
East Rim Divide 7930 5.4 4.6 117 5.4 5.4 100
Elkhart Park G.S. 9400 5.9 5.9 100 5.4 6.4 84
Gros Ventre Summit 8750 6.5 6.4 102 6.2 6.4 97
Gunsight Pass 9820 6.5 6.2 105 6.3 7.0 90
Indian Creek 9425 12.5 10.0 125 10.6 9.4 113
Kendall R.S. 7740 5.7 5.4 106 6.1 6.8 90
Larsen Creek 9000 4.6 2.9 159 7.0 5.8 121
Loomis Park 8240 7.6 6.8 112 7.7 7.8 99
New Fork Lake 8340 5.6 4.8 117 -M 5.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 6.1 5.4 113 7.3 6.6 111
Spring Creek Divide 9000 11.7 10.3 114 12.1 10.9 111
Triple Peak 8500 12.2 9.0 136 12.2 11.0 111
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Basin Index (%) 116 103
LOWER GREEN RIVER
Blacks Fork Jct 8869 7.2 3.5 206 7.3 5.9 124
Buck Pasture 9632 9.6 -M * 10.8 -M *
EF Blacks Fork GS 9360 8.5 4.0 212 6.5 5.2 125
Hams Fork 7840 6.4 4.7 136 6.2 5.3 117
Henrys Fork 10182 -M -M * 7.7 -M *
Hewinta 9500 5.9 4.0 148 8.0 6.7 119
Hickerson Park 9122 5.0 3.1 161 5.9 5.0 118
Hole-in-Rock 9168 4.2 3.1 135 5.8 5.2 112
Indian Creek 9425 12.5 10.0 125 10.6 9.4 113
Kelley R.S. 8180 8.9 6.3 141 9.2 8.0 115
Spirit Lk 10235 9.3 5.5 169 9.2 8.1 114
Steel Creek Park 10158 9.9 6.2 160 9.9 7.4 134
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Basin Index (%) 154 119
UPPER BEAR RIVER
Bear River RS 8777 6.7 3.8 176 7.8 5.7 137
Bug Lake 7987 11.9 6.6 180 10.1 8.2 123
Burts Miller Ranch 8000 5.7 2.6 219 8.3 4.1 202
Chalk Creek #1 9171 13.4 9.2 146 14.0 10.5 133
Giveout 6930 5.6 3.4 165 6.8 6.0 113
Hayden Fork 9130 8.9 5.6 159 12.2 9.2 133
Kelley R.S. 8180 8.9 6.3 141 9.2 8.0 115
Lily Lake 9133 8.5 5.2 163 8.5 7.6 112
Monte Cristo 8932 16.5 10.1 163 16.3 11.6 141
Salt River Summit 7640 7.8 5.0 156 7.8 7.2 108
Spring Creek Divide 9000 11.7 10.3 114 12.1 10.9 111
Trial Lake 9992 14.7 8.4 175 15.1 10.0 151
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Basin Index (%) 157 129
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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.
