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 TUESDAY: DECEMBER 27 , 2022
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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 7.1 6.7 106 8.1 9.2 88
Blind Bull Sum 8650 8.1 8.7 93 5.7 8.0 71
Cottonwood Creek 7670 8.2 8.0 102 8.8 9.9 89
East Rim Divide 7930 4.1 4.0 102 4.2 5.1 82
Grand Targhee 9260 19.3 18.6 104 11.9 15.6 76
Granite Creek 6770 5.8 5.9 98 5.6 8.8 64
Grassy Lake 7265 12.2 11.2 109 15.5 14.4 108
Gros Ventre Summit 8750 5.3 5.6 95 5.5 5.8 95
Gunsight Pass 9820 5.5 5.4 102 5.6 6.6 85
Lewis Lake Divide 7850 14.2 11.6 122 17.1 14.8 116
Loomis Park 8240 5.9 5.8 102 6.0 7.3 82
Phillips Bench 8200 11.0 9.4 117 11.6 11.2 104
Salt River Summit 7640 5.8 4.4 132 5.9 6.2 95
Snake River Station 6920 7.9 6.0 132 10.3 9.7 106
Somsen Ranch 6800 6.3 4.4 143 7.7 7.4 104
Spring Creek Divide 9000 9.0 8.8 102 9.1 9.6 95
Thumb Divide 7980 9.4 5.9 159 9.3 7.8 119
Togwotee Pass 9580 9.4 10.0 94 9.5 10.5 90
Triple Peak 8500 8.9 8.4 106 9.4 10.2 92
Two Ocean Plateau 9240 14.6 12.4 118 11.8 11.4 104
Willow Creek 8080 11.7 9.9 118 12.6 14.2 89
Younts Peak 8350 7.2 6.0 120 6.6 6.6 100
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Basin Index (%) 111 94
MADISON HEADWATERS IN WYOMING
Black Bear 8170 17.4 15.2 114 18.4 16.3 113
Canyon 7870 6.9 -M * 8.4 -M *
Madison Plateau 7750 12.5 9.0 139 14.0 10.8 130
West Yellowstone 6700 7.0 4.2 167 9.4 6.6 142
Whiskey Creek 6800 8.8 5.5 160 12.5 8.6 145
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Basin Index (%) 135 128
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 8.6 9.0 96 7.6 8.8 86
Canyon 7870 6.9 -M * 8.4 -M *
Evening Star 9200 11.3 10.8 105 13.8 13.4 103
Fisher Creek 9100 15.8 13.9 114 17.3 13.5 128
Monument Peak 8850 9.7 8.8 110 11.9 10.1 118
Northeast Entrance 7350 4.5 3.6 125 6.6 6.2 106
Parker Peak 9400 10.5 9.4 112 -M 9.4 *
Sylvan Lake 8420 8.2 8.0 102 10.7 10.7 100
Thumb Divide 7980 9.4 5.9 159 9.3 7.8 119
Two Ocean Plateau 9240 14.6 12.4 118 11.8 11.4 104
White Mill 8700 11.4 9.8 116 11.5 9.8 117
Wolverine 7650 6.0 4.6 130 6.4 5.8 110
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Basin Index (%) 114 110
WIND RIVER
Burroughs Creek 8750 4.3 -M * 4.9 -M *
Castle Creek 8400 2.9 3.2 91 3.6 4.4 82
Cold Springs 9630 3.8 3.4 112 4.8 4.6 104
Deer Park 9700 9.6 6.0 160 9.9 7.7 129
Hobbs Park 10100 7.4 5.9 125 6.8 5.8 117
Kirwin 9550 4.3 5.2 83 5.8 5.8 100
Little Warm 9370 4.6 4.0 115 5.5 5.9 93
South Pass 9040 7.2 5.8 124 6.8 6.9 99
St. Lawrence Alt 8620 3.0 -M * 4.7 -M *
Togwotee Pass 9580 9.4 10.0 94 9.5 10.5 90
Townsend Creek 8700 4.4 3.9 113 5.2 5.4 96
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Basin Index (%) 113 102
BIGHORN BASIN
Bald Mtn. 9380 8.4 8.0 105 7.2 7.2 100
Bear Trap Meadow 8200 4.0 2.6 154 4.8 4.2 114
Bone Springs Div 9350 5.7 7.0 81 5.7 6.8 84
Grave Springs 8550 4.7 3.0 157 5.0 4.2 119
Kirwin 9550 4.3 5.2 83 5.8 5.8 100
Marquette 8760 3.1 3.4 91 3.9 4.5 87
Middle Powder 7760 5.9 4.1 144 5.3 4.9 108
Owl Creek 8975 3.4 2.5 136 4.0 3.1 129
Powder River Pass 9480 4.6 4.7 98 6.2 6.0 103
Shell Creek 9580 5.6 7.0 80 6.3 6.2 102
Timber Creek 7950 2.0 2.1 95 2.6 4.0 65
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Basin Index (%) 104 100
SHOSHONE RIVER
Blackwater 9780 9.9 10.4 95 9.9 10.2 97
Evening Star 9200 11.3 10.8 105 13.8 13.4 103
Marquette 8760 3.1 3.4 91 3.9 4.5 87
Sylvan Lake 8420 8.2 8.0 102 10.7 10.7 100
Sylvan Road 7120 4.7 5.1 92 7.1 8.4 85
Younts Peak 8350 7.2 6.0 120 6.6 6.6 100
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Basin Index (%) 102 97
POWDER RIVER
Bear Trap Meadow 8200 4.0 2.6 154 4.8 4.2 114
Cloud Peak Reservoir 9860 6.5 5.8 112 6.7 6.2 108
Grave Springs 8550 4.7 3.0 157 5.0 4.2 119
Hansen Sawmill 8360 3.7 2.9 128 4.0 3.9 103
Middle Powder 7760 5.9 4.1 144 5.3 4.9 108
Powder River Pass 9480 4.6 4.7 98 6.2 6.0 103
Soldier Park 8720 2.2 2.0 110 3.5 4.2 83
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Basin Index (%) 126 106
TONGUE RIVER
Big Goose 7990 4.5 3.2 141 4.9 4.7 104
Bone Springs Div 9350 5.7 7.0 81 5.7 6.8 84
Burgess Junction 7880 5.9 4.2 140 7.5 5.4 139
Dome Lake 8880 3.9 4.4 89 5.6 5.6 100
Little Goose 8870 4.8 4.0 120 5.6 5.4 104
Sucker Creek 8880 5.9 5.0 118 8.1 6.1 133
Tie Creek 6870 3.7 2.0 185 6.2 4.9 127
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Basin Index (%) 115 112
BELLE FOURCHE
Blind Park 6890 3.4 2.7 126 5.0 4.6 109
Cole Canyon 5910 2.8 2.0 140 4.0 4.0 100
North Rapid Creek 6130 3.6 2.9 124 4.1 3.4 121
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Basin Index (%) 129 109
CHEYENNE RIVER BASIN
Blind Park 6890 3.4 2.7 126 5.0 4.6 109
North Rapid Creek 6130 3.6 2.9 124 4.1 3.4 121
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Basin Index (%) 125 114
UPPER N. PLATTE
Arapaho Ridge 10976 8.7 9.0 97 9.0 9.8 92
Blackhall Mtn 9839 11.2 11.7 96 12.3 13.3 92
Cinnabar Park 9707 -M 8.4 * 7.8 10.2 76
Columbine 9167 8.8 8.1 109 9.6 10.1 95
Divide Peak 8730 7.6 7.2 106 9.8 9.6 102
Joe Wright 10158 8.8 7.8 113 11.6 10.8 107
Laprele Creek 8390 3.0 3.6 83 3.3 5.1 65
Med Bow 10512 11.1 -M * 11.4 -M *
Never Summer 10323 9.9 8.2 121 6.8 8.0 85
North French Creek 10153 9.3 10.7 87 9.5 11.4 83
Old Battle 9860 10.5 11.7 90 12.5 14.0 89
Rawah 9069 6.4 4.8 133 7.5 7.4 101
Sage Creek Basin 7850 5.9 4.9 120 7.0 6.2 113
Sand Lake 10098 9.2 10.8 85 9.6 10.2 94
South Brush Creek 8495 6.3 4.2 150 5.7 5.8 98
Tower 10620 15.5 15.8 98 16.1 16.4 98
Webber Springs 9260 7.7 8.6 90 8.8 10.9 81
Whiskey Park 9020 11.3 9.2 123 11.9 11.6 103
Willow Creek Pass 9523 6.0 5.4 111 6.9 6.2 111
Zirkel 9338 9.1 10.2 89 11.2 13.0 86
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Basin Index (%) 102 93
SWEETWATER
Deer Park 9700 9.6 6.0 160 9.9 7.7 129
Larsen Creek 9000 3.4 2.8 121 5.6 5.7 98
South Pass 9040 7.2 5.8 124 6.8 6.9 99
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Basin Index (%) 138 110
LOWER N. PLATTE
Casper Mtn. 7920 4.2 5.0 84 4.2 6.4 66
Laprele Creek 8390 3.0 3.6 83 3.3 5.1 65
Reno Hill 8430 5.1 5.6 91 6.5 6.5 100
Windy Peak 7915 2.3 3.0 77 3.0 4.6 65
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Basin Index (%) 85 75
LARAMIE RIVER
Brooklyn Lake 10250 7.3 7.6 96 8.5 8.4 101
Cinnabar Park 9707 -M 8.4 * 7.8 10.2 76
Crow Creek 8335 1.7 3.6 47 3.6 4.7 77
Deadman Hill 10239 7.2 7.4 97 6.9 7.6 91
Rawah 9069 6.4 4.8 133 7.5 7.4 101
Roach 9740 6.2 6.4 97 7.2 8.2 88
Windy Peak 7915 2.3 3.0 77 3.0 4.6 65
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Basin Index (%) 95 87
S. PLATTE
Crow Creek 8335 1.7 3.6 47 3.6 4.7 77
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Basin Index (%) 47 77
LITTLE SNAKE RIVER
Battle Mountain 7498 5.8 4.0 145 8.8 6.4 138
Divide Peak 8730 7.6 7.2 106 9.8 9.6 102
Elk River 8739 8.9 5.9 151 9.2 8.2 112
Elkhead Divide 8800 8.8 -M * -M -M *
Little Snake River 8928 9.1 9.6 95 13.2 14.6 90
Old Battle 9860 10.5 11.7 90 12.5 14.0 89
Sage Creek Basin 7850 5.9 4.9 120 7.0 6.2 113
Sandstone RS 8152 6.1 4.6 133 8.0 7.6 105
Whiskey Park 9020 11.3 9.2 123 11.9 11.6 103
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Basin Index (%) 114 103
UPPER GREEN RIVER
Big Sandy Opening 9080 5.7 5.4 106 5.6 5.4 104
Blind Bull Sum 8650 8.1 8.7 93 5.7 8.0 71
East Rim Divide 7930 4.1 4.0 102 4.2 5.1 82
Elkhart Park G.S. 9400 4.9 5.4 91 4.3 6.1 70
Gros Ventre Summit 8750 5.3 5.6 95 5.5 5.8 95
Gunsight Pass 9820 5.5 5.4 102 5.6 6.6 85
Indian Creek 9425 8.8 9.1 97 7.4 8.7 85
Kendall R.S. 7740 4.3 4.6 93 4.7 6.3 75
Larsen Creek 9000 3.4 2.8 121 5.6 5.7 98
Loomis Park 8240 5.9 5.8 102 6.0 7.3 82
New Fork Lake 8340 4.5 4.3 105 -M 4.7 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.1 4.7 87 5.3 6.0 88
Spring Creek Divide 9000 9.0 8.8 102 9.1 9.6 95
Triple Peak 8500 8.9 8.4 106 9.4 10.2 92
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Basin Index (%) 99 86
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.9 3.3 179 6.1 5.7 107
Buck Pasture 9632 7.4 -M * 8.6 -M *
EF Blacks Fork GS 9360 7.3 3.8 192 5.0 5.1 98
Hams Fork 7840 4.2 4.5 93 3.9 4.9 80
Henrys Fork 10182 -M -M * 6.0 -M *
Hewinta 9500 4.6 3.3 139 6.7 6.2 108
Hickerson Park 9122 4.2 2.8 150 5.1 4.8 106
Hole-in-Rock 9168 3.1 2.9 107 4.8 4.6 104
Indian Creek 9425 8.8 9.1 97 7.4 8.7 85
Kelley R.S. 8180 6.4 5.7 112 6.7 7.4 91
Spirit Lk 10235 7.9 5.1 155 8.0 7.7 104
Steel Creek Park 10158 8.2 5.8 141 8.2 7.0 117
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Basin Index (%) 131 100
UPPER BEAR RIVER
Bear River RS 8777 4.8 3.6 133 5.9 5.2 113
Bug Lake 7987 7.8 6.2 126 7.3 7.8 94
Burts Miller Ranch 8000 3.7 2.3 161 6.4 3.5 183
Chalk Creek #1 9171 9.5 8.6 110 10.2 9.8 104
Giveout 6930 3.7 2.9 128 4.8 5.4 89
Hayden Fork 9130 6.0 5.2 115 9.3 8.6 108
Kelley R.S. 8180 6.4 5.7 112 6.7 7.4 91
Lily Lake 9133 6.3 4.7 134 6.5 7.0 93
Monte Cristo 8932 11.6 9.4 123 12.3 10.3 119
Salt River Summit 7640 5.8 4.4 132 5.9 6.2 95
Spring Creek Divide 9000 9.0 8.8 102 9.1 9.6 95
Trial Lake 9992 9.3 8.4 111 10.2 9.4 109
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Basin Index (%) 120 105
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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.
