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: DECEMBER 28 , 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 7.7 7.0 110 8.5 9.5 89
Blind Bull Sum 8650 9.3 8.8 106 6.3 8.2 77
Cottonwood Creek 7670 8.9 8.0 111 9.5 10.0 95
East Rim Divide 7930 4.4 4.3 102 4.5 5.1 88
Grand Targhee 9260 19.1 19.2 99 12.0 15.6 77
Granite Creek 6770 6.7 6.0 112 6.3 8.8 72
Grassy Lake 7265 12.9 11.6 111 16.2 15.0 108
Gros Ventre Summit 8750 5.8 5.8 100 5.7 5.8 98
Gunsight Pass 9820 5.9 5.6 105 5.9 6.7 88
Lewis Lake Divide 7850 15.4 12.4 124 18.1 15.1 120
Loomis Park 8240 6.5 6.1 107 6.7 7.5 89
Phillips Bench 8200 12.1 9.6 126 12.7 11.3 112
Salt River Summit 7640 6.6 4.4 150 6.7 6.3 106
Snake River Station 6920 8.5 6.4 133 10.9 9.9 110
Somsen Ranch 6800 7.2 4.4 164 8.7 7.4 118
Spring Creek Divide 9000 10.0 9.0 111 10.0 9.8 102
Thumb Divide 7980 10.5 5.9 178 10.2 8.0 128
Togwotee Pass 9580 10.0 10.0 100 9.9 10.8 92
Triple Peak 8500 10.1 8.5 119 10.5 10.3 102
Two Ocean Plateau 9240 15.6 12.4 126 12.5 11.5 109
Willow Creek 8080 13.1 10.0 131 13.8 14.4 96
Younts Peak 8350 7.8 6.0 130 7.0 6.6 106
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Basin Index (%) 118 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 19.1 15.6 122 19.7 16.6 119
Canyon 7870 7.2 -M * 8.8 -M *
Madison Plateau 7750 13.7 9.3 147 14.8 11.1 133
West Yellowstone 6700 7.6 4.2 181 10.1 6.8 149
Whiskey Creek 6800 9.5 5.8 164 13.1 8.8 149
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Basin Index (%) 143 133
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 8.8 9.3 95 7.7 8.9 87
Canyon 7870 7.2 -M * 8.8 -M *
Evening Star 9200 12.0 11.0 109 14.3 13.6 105
Fisher Creek 9100 17.0 14.0 121 18.0 13.9 129
Monument Peak 8850 10.3 9.0 114 12.5 10.1 124
Northeast Entrance 7350 4.6 3.8 121 6.8 6.2 110
Parker Peak 9400 11.2 9.6 117 11.5 9.4 122
Sylvan Lake 8420 8.9 8.1 110 11.5 10.9 106
Thumb Divide 7980 10.5 5.9 178 10.2 8.0 128
Two Ocean Plateau 9240 15.6 12.4 126 12.5 11.5 109
White Mill 8700 11.8 9.8 120 11.8 9.8 120
Wolverine 7650 6.1 4.8 127 6.4 5.8 110
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Basin Index (%) 120 114
WIND RIVER
Burroughs Creek 8750 4.8 -M * 5.4 -M *
Castle Creek 8400 3.0 3.2 94 3.7 4.4 84
Cold Springs 9630 3.9 3.4 115 4.9 4.6 107
Deer Park 9700 11.0 6.0 183 11.3 7.7 147
Hobbs Park 10100 7.7 6.0 128 7.1 6.0 118
Kirwin 9550 4.6 5.2 88 6.1 5.9 103
Little Warm 9370 4.9 4.1 120 5.8 6.0 97
South Pass 9040 8.2 5.8 141 7.0 6.9 101
St. Lawrence Alt 8620 3.0 -M * 4.8 -M *
Togwotee Pass 9580 10.0 10.0 100 9.9 10.8 92
Townsend Creek 8700 4.6 3.9 118 5.4 5.6 96
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Basin Index (%) 122 106
BIGHORN BASIN
Bald Mtn. 9380 8.4 8.2 102 7.1 7.4 96
Bear Trap Meadow 8200 3.9 2.6 150 4.7 4.2 112
Bone Springs Div 9350 5.7 7.1 80 5.7 6.8 84
Grave Springs 8550 4.6 3.0 153 5.0 4.3 116
Kirwin 9550 4.6 5.2 88 6.1 5.9 103
Marquette 8760 2.9 3.4 85 3.9 4.6 85
Middle Powder 7760 5.9 4.1 144 5.2 4.9 106
Owl Creek 8975 3.4 2.5 136 4.1 3.2 128
Powder River Pass 9480 4.6 4.7 98 6.2 6.0 103
Shell Creek 9580 5.6 7.0 80 6.3 6.3 100
Timber Creek 7950 2.0 2.2 91 2.6 4.0 65
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Basin Index (%) 103 99
SHOSHONE RIVER
Blackwater 9780 10.4 10.6 98 10.3 10.2 101
Evening Star 9200 12.0 11.0 109 14.3 13.6 105
Marquette 8760 2.9 3.4 85 3.9 4.6 85
Sylvan Lake 8420 8.9 8.1 110 11.5 10.9 106
Sylvan Road 7120 5.0 5.2 96 7.5 8.4 89
Younts Peak 8350 7.8 6.0 130 7.0 6.6 106
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Basin Index (%) 106 100
POWDER RIVER
Bear Trap Meadow 8200 3.9 2.6 150 4.7 4.2 112
Cloud Peak Reservoir 9860 6.6 6.0 110 6.6 6.2 106
Grave Springs 8550 4.6 3.0 153 5.0 4.3 116
Hansen Sawmill 8360 3.6 3.0 120 3.9 4.0 98
Middle Powder 7760 5.9 4.1 144 5.2 4.9 106
Powder River Pass 9480 4.6 4.7 98 6.2 6.0 103
Soldier Park 8720 2.1 2.0 105 3.4 4.3 79
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Basin Index (%) 123 103
TONGUE RIVER
Big Goose 7990 4.4 3.2 138 4.9 4.8 102
Bone Springs Div 9350 5.7 7.1 80 5.7 6.8 84
Burgess Junction 7880 5.9 4.4 134 7.3 5.4 135
Dome Lake 8880 3.9 4.6 85 5.6 5.6 100
Little Goose 8870 4.7 4.0 118 5.6 5.5 102
Sucker Creek 8880 5.9 5.0 118 8.0 6.1 131
Tie Creek 6870 3.5 2.0 175 6.1 5.0 122
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Basin Index (%) 112 110
BELLE FOURCHE
Blind Park 6890 3.4 2.8 121 5.0 4.6 109
Cole Canyon 5910 2.8 2.2 127 4.0 4.0 100
North Rapid Creek 6130 3.7 3.2 116 4.1 3.6 114
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Basin Index (%) 121 107
CHEYENNE RIVER BASIN
Blind Park 6890 3.4 2.8 121 5.0 4.6 109
North Rapid Creek 6130 3.7 3.2 116 4.1 3.6 114
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Basin Index (%) 118 111
UPPER N. PLATTE
Arapaho Ridge 10976 9.4 9.2 102 9.6 9.9 97
Blackhall Mtn 9839 12.3 11.8 104 13.4 13.4 100
Cinnabar Park 9707 -M 8.4 * 8.3 10.2 81
Columbine 9167 9.6 8.4 114 10.3 10.2 101
Divide Peak 8730 8.5 7.2 118 10.4 9.8 106
Joe Wright 10158 9.2 8.0 115 11.8 11.0 107
Laprele Creek 8390 3.0 3.6 83 3.3 5.2 63
Med Bow 10512 12.1 -M * 12.2 -M *
Never Summer 10323 10.1 8.2 123 7.0 8.0 88
North French Creek 10153 10.0 10.8 93 10.1 11.4 89
Old Battle 9860 11.7 11.8 99 13.7 14.0 98
Rawah 9069 6.8 4.8 142 7.7 7.5 103
Sage Creek Basin 7850 7.2 5.0 144 7.9 6.3 125
Sand Lake 10098 9.6 11.0 87 9.9 10.2 97
South Brush Creek 8495 6.6 4.3 153 6.0 5.8 103
Tower 10620 16.9 16.0 106 17.1 16.5 104
Webber Springs 9260 8.6 8.8 98 9.6 11.0 87
Whiskey Park 9020 13.0 9.2 141 13.3 11.6 115
Willow Creek Pass 9523 6.4 5.4 119 7.3 6.4 114
Zirkel 9338 9.9 10.3 96 11.9 13.0 92
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Basin Index (%) 110 99
SWEETWATER
Deer Park 9700 11.0 6.0 183 11.3 7.7 147
Larsen Creek 9000 4.2 2.9 145 6.3 5.8 109
South Pass 9040 8.2 5.8 141 7.0 6.9 101
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Basin Index (%) 159 121
LOWER N. PLATTE
Casper Mtn. 7920 4.2 5.2 81 4.2 6.5 65
Laprele Creek 8390 3.0 3.6 83 3.3 5.2 63
Reno Hill 8430 5.2 5.6 93 6.5 6.5 100
Windy Peak 7915 2.3 3.0 77 2.9 4.6 63
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Basin Index (%) 84 74
LARAMIE RIVER
Brooklyn Lake 10250 7.7 7.8 99 8.9 8.5 105
Cinnabar Park 9707 -M 8.4 * 8.3 10.2 81
Crow Creek 8335 1.7 3.6 47 3.5 4.8 73
Deadman Hill 10239 7.3 7.4 99 7.0 7.7 91
Rawah 9069 6.8 4.8 142 7.7 7.5 103
Roach 9740 6.7 6.4 105 7.8 8.3 94
Windy Peak 7915 2.3 3.0 77 2.9 4.6 63
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Basin Index (%) 98 89
S. PLATTE
Crow Creek 8335 1.7 3.6 47 3.5 4.8 73
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Basin Index (%) 47 73
LITTLE SNAKE RIVER
Battle Mountain 7498 7.2 4.0 180 9.7 6.4 152
Divide Peak 8730 8.5 7.2 118 10.4 9.8 106
Elk River 8739 9.6 6.0 160 9.5 8.2 116
Elkhead Divide 8800 10.4 -M * -M -M *
Little Snake River 8928 11.0 9.6 115 15.2 14.7 103
Old Battle 9860 11.7 11.8 99 13.7 14.0 98
Sage Creek Basin 7850 7.2 5.0 144 7.9 6.3 125
Sandstone RS 8152 7.8 4.6 170 9.5 7.6 125
Whiskey Park 9020 13.0 9.2 141 13.3 11.6 115
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Basin Index (%) 132 113
UPPER GREEN RIVER
Big Sandy Opening 9080 6.4 5.6 114 6.3 5.4 117
Blind Bull Sum 8650 9.3 8.8 106 6.3 8.2 77
East Rim Divide 7930 4.4 4.3 102 4.5 5.1 88
Elkhart Park G.S. 9400 5.3 5.5 96 4.8 6.2 77
Gros Ventre Summit 8750 5.8 5.8 100 5.7 5.8 98
Gunsight Pass 9820 5.9 5.6 105 5.9 6.7 88
Indian Creek 9425 10.2 9.5 107 8.5 8.8 97
Kendall R.S. 7740 5.1 4.8 106 5.3 6.4 83
Larsen Creek 9000 4.2 2.9 145 6.3 5.8 109
Loomis Park 8240 6.5 6.1 107 6.7 7.5 89
New Fork Lake 8340 4.9 4.4 111 -M 4.8 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.7 4.8 98 5.8 6.0 97
Spring Creek Divide 9000 10.0 9.0 111 10.0 9.8 102
Triple Peak 8500 10.1 8.5 119 10.5 10.3 102
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Basin Index (%) 108 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.2 3.2 194 6.3 5.7 111
Buck Pasture 9632 7.7 -M * 8.8 -M *
EF Blacks Fork GS 9360 7.3 3.8 192 5.0 5.1 98
Hams Fork 7840 5.2 4.5 116 4.6 5.0 92
Henrys Fork 10182 -M -M * 6.1 -M *
Hewinta 9500 4.8 3.3 145 6.8 6.3 108
Hickerson Park 9122 4.1 2.8 146 5.1 4.8 106
Hole-in-Rock 9168 3.2 2.9 110 4.9 4.6 107
Indian Creek 9425 10.2 9.5 107 8.5 8.8 97
Kelley R.S. 8180 7.6 5.8 131 7.8 7.4 105
Spirit Lk 10235 7.9 5.2 152 8.0 7.8 103
Steel Creek Park 10158 8.5 5.8 147 8.4 7.1 118
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Basin Index (%) 139 104
UPPER BEAR RIVER
Bear River RS 8777 5.3 3.6 147 6.2 5.2 119
Bug Lake 7987 9.4 6.4 147 8.0 7.8 103
Burts Miller Ranch 8000 3.9 2.3 170 6.6 3.5 189
Chalk Creek #1 9171 10.7 8.8 122 11.1 9.8 113
Giveout 6930 4.4 2.9 152 5.5 5.6 98
Hayden Fork 9130 6.7 5.3 126 9.8 8.6 114
Kelley R.S. 8180 7.6 5.8 131 7.8 7.4 105
Lily Lake 9133 6.7 4.8 140 6.7 7.1 94
Monte Cristo 8932 13.0 9.7 134 13.2 10.6 125
Salt River Summit 7640 6.6 4.4 150 6.7 6.3 106
Spring Creek Divide 9000 10.0 9.0 111 10.0 9.8 102
Trial Lake 9992 11.2 8.4 133 11.9 9.4 127
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Basin Index (%) 134 114
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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.