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 SATURDAY: DECEMBER 24 , 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 6.8 6.2 110 7.9 9.1 87
Blind Bull Sum 8650 7.7 8.4 92 5.5 7.8 71
Cottonwood Creek 7670 7.8 7.6 103 8.4 9.4 89
East Rim Divide 7930 4.0 3.8 105 4.1 4.7 87
Grand Targhee 9260 19.0 17.7 107 11.4 14.5 79
Granite Creek 6770 5.8 5.7 102 5.4 8.0 68
Grassy Lake 7265 11.7 10.6 110 15.0 13.6 110
Gros Ventre Summit 8750 5.1 5.2 98 5.5 5.6 98
Gunsight Pass 9820 5.4 5.0 108 5.5 6.4 86
Lewis Lake Divide 7850 13.8 11.0 125 16.7 14.2 118
Loomis Park 8240 5.8 5.5 105 6.0 7.0 86
Phillips Bench 8200 10.7 8.8 122 11.4 10.6 108
Salt River Summit 7640 5.5 4.3 128 5.6 6.0 93
Snake River Station 6920 7.6 5.6 136 10.0 9.6 104
Somsen Ranch 6800 6.1 4.0 152 7.6 6.9 110
Spring Creek Divide 9000 -M 8.4 * -M 9.2 *
Thumb Divide 7980 9.1 5.4 169 9.0 7.6 118
Togwotee Pass 9580 8.9 9.9 90 9.1 10.2 89
Triple Peak 8500 8.5 8.0 106 9.0 9.6 94
Two Ocean Plateau 9240 14.3 11.8 121 11.3 11.0 103
Willow Creek 8080 11.1 9.7 114 12.1 13.8 88
Younts Peak 8350 6.8 5.8 117 6.4 6.4 100
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Basin Index (%) 113 95
MADISON HEADWATERS IN WYOMING
Black Bear 8170 17.0 14.6 116 17.7 15.7 113
Canyon 7870 6.6 -M * 8.3 -M *
Madison Plateau 7750 12.2 8.4 145 13.8 10.5 131
West Yellowstone 6700 6.7 3.9 172 9.4 5.9 159
Whiskey Creek 6800 8.5 5.2 163 12.5 8.2 152
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Basin Index (%) 138 133
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 8.0 9.0 89 7.2 8.4 86
Canyon 7870 6.6 -M * 8.3 -M *
Evening Star 9200 10.6 10.6 100 12.9 13.2 98
Fisher Creek 9100 14.8 13.5 110 16.2 13.1 124
Monument Peak 8850 8.8 8.4 105 11.1 9.6 116
Northeast Entrance 7350 4.1 3.2 128 6.4 6.0 107
Parker Peak 9400 9.8 9.1 108 9.7 9.0 108
Sylvan Lake 8420 7.8 7.7 101 10.3 10.4 99
Thumb Divide 7980 9.1 5.4 169 9.0 7.6 118
Two Ocean Plateau 9240 14.3 11.8 121 11.3 11.0 103
White Mill 8700 10.8 9.6 112 10.8 9.8 110
Wolverine 7650 5.5 4.4 125 6.0 5.6 107
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Basin Index (%) 112 107
WIND RIVER
Burroughs Creek 8750 4.2 -M * 4.9 -M *
Castle Creek 8400 2.8 3.0 93 3.6 4.2 86
Cold Springs 9630 3.8 3.4 112 4.9 4.4 111
Deer Park 9700 9.6 5.2 185 9.9 7.1 139
Hobbs Park 10100 7.3 5.6 130 6.8 5.4 126
Kirwin 9550 4.2 5.0 84 5.7 5.4 106
Little Warm 9370 4.5 4.0 112 5.3 5.7 93
South Pass 9040 7.2 5.4 133 6.2 6.6 94
St. Lawrence Alt 8620 3.0 -M * 4.6 -M *
Togwotee Pass 9580 8.9 9.9 90 9.1 10.2 89
Townsend Creek 8700 4.3 3.6 119 5.1 5.2 98
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Basin Index (%) 117 104
BIGHORN BASIN
Bald Mtn. 9380 7.3 7.8 94 6.4 7.2 89
Bear Trap Meadow 8200 3.7 2.6 142 4.5 4.0 112
Bone Springs Div 9350 5.0 6.8 74 5.3 6.6 80
Grave Springs 8550 4.3 3.0 143 4.8 4.0 120
Kirwin 9550 4.2 5.0 84 5.7 5.4 106
Marquette 8760 3.1 3.4 91 3.9 4.4 89
Middle Powder 7760 5.6 3.8 147 5.0 4.8 104
Owl Creek 8975 3.4 2.3 148 3.9 3.0 130
Powder River Pass 9480 4.4 4.4 100 5.8 5.6 104
Shell Creek 9580 5.1 6.8 75 5.9 6.0 98
Timber Creek 7950 2.1 1.9 111 2.6 3.8 68
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Basin Index (%) 101 98
SHOSHONE RIVER
Blackwater 9780 9.8 10.2 96 9.5 9.8 97
Evening Star 9200 10.6 10.6 100 12.9 13.2 98
Marquette 8760 3.1 3.4 91 3.9 4.4 89
Sylvan Lake 8420 7.8 7.7 101 10.3 10.4 99
Sylvan Road 7120 4.4 4.8 92 6.9 8.0 86
Younts Peak 8350 6.8 5.8 117 6.4 6.4 100
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Basin Index (%) 100 96
POWDER RIVER
Bear Trap Meadow 8200 3.7 2.6 142 4.5 4.0 112
Cloud Peak Reservoir 9860 6.1 5.6 109 6.3 6.0 105
Grave Springs 8550 4.3 3.0 143 4.8 4.0 120
Hansen Sawmill 8360 3.5 2.6 135 3.8 3.8 100
Middle Powder 7760 5.6 3.8 147 5.0 4.8 104
Powder River Pass 9480 4.4 4.4 100 5.8 5.6 104
Soldier Park 8720 2.0 2.0 100 3.3 4.0 82
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Basin Index (%) 123 104
TONGUE RIVER
Big Goose 7990 4.2 3.1 135 4.8 4.4 109
Bone Springs Div 9350 5.0 6.8 74 5.3 6.6 80
Burgess Junction 7880 5.2 4.0 130 6.8 5.0 136
Dome Lake 8880 3.5 4.2 83 5.3 5.4 98
Little Goose 8870 4.5 3.6 125 5.4 5.2 104
Sucker Creek 8880 5.2 4.8 108 7.3 5.9 124
Tie Creek 6870 3.3 1.7 194 5.8 4.8 121
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Basin Index (%) 110 109
BELLE FOURCHE
Blind Park 6890 3.4 2.6 131 4.8 4.6 104
Cole Canyon 5910 2.4 1.7 141 3.8 3.9 97
North Rapid Creek 6130 3.2 2.8 114 4.0 3.4 118
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Basin Index (%) 127 106
CHEYENNE RIVER BASIN
Blind Park 6890 3.4 2.6 131 4.8 4.6 104
North Rapid Creek 6130 3.2 2.8 114 4.0 3.4 118
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Basin Index (%) 122 110
UPPER N. PLATTE
Arapaho Ridge 10976 8.4 8.8 95 8.7 9.4 93
Blackhall Mtn 9839 10.8 11.2 96 12.0 12.9 93
Cinnabar Park 9707 -M 8.0 * 7.3 9.7 75
Columbine 9167 8.2 7.9 104 9.1 9.6 95
Divide Peak 8730 7.5 6.7 112 9.7 9.0 108
Joe Wright 10158 8.4 7.6 111 10.9 10.6 103
Laprele Creek 8390 2.9 3.4 85 3.1 5.0 62
Med Bow 10512 10.6 -M * 10.9 -M *
Never Summer 10323 9.7 7.9 123 6.8 7.8 87
North French Creek 10153 8.8 10.1 87 9.0 10.6 85
Old Battle 9860 10.2 11.3 90 12.0 13.5 89
Rawah 9069 6.1 4.4 139 7.1 7.2 99
Sage Creek Basin 7850 5.8 4.4 132 7.0 5.7 123
Sand Lake 10098 8.9 10.4 86 9.4 9.9 95
South Brush Creek 8495 6.1 4.1 149 5.5 5.8 95
Tower 10620 14.7 15.4 95 15.4 15.9 97
Webber Springs 9260 7.6 8.3 92 8.4 10.7 79
Whiskey Park 9020 10.8 8.7 124 11.5 11.1 104
Willow Creek Pass 9523 6.0 5.2 115 6.9 6.0 115
Zirkel 9338 8.4 9.6 88 10.6 12.5 85
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Basin Index (%) 103 93
SWEETWATER
Deer Park 9700 9.6 5.2 185 9.9 7.1 139
Larsen Creek 9000 3.3 2.8 118 5.6 5.5 102
South Pass 9040 7.2 5.4 133 6.2 6.6 94
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Basin Index (%) 150 113
LOWER N. PLATTE
Casper Mtn. 7920 4.0 4.8 83 4.0 6.0 67
Laprele Creek 8390 2.9 3.4 85 3.1 5.0 62
Reno Hill 8430 4.8 5.3 91 6.3 6.1 103
Windy Peak 7915 2.1 3.0 70 2.8 4.6 61
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Basin Index (%) 84 75
LARAMIE RIVER
Brooklyn Lake 10250 6.7 7.4 91 7.9 7.8 101
Cinnabar Park 9707 -M 8.0 * 7.3 9.7 75
Crow Creek 8335 1.7 3.4 50 3.5 4.6 76
Deadman Hill 10239 7.0 7.2 97 6.6 7.3 90
Rawah 9069 6.1 4.4 139 7.1 7.2 99
Roach 9740 6.0 6.0 100 6.9 7.9 87
Windy Peak 7915 2.1 3.0 70 2.8 4.6 61
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Basin Index (%) 94 86
S. PLATTE
Crow Creek 8335 1.7 3.4 50 3.5 4.6 76
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Basin Index (%) 50 76
LITTLE SNAKE RIVER
Battle Mountain 7498 5.8 3.5 166 8.7 6.1 143
Divide Peak 8730 7.5 6.7 112 9.7 9.0 108
Elk River 8739 8.3 5.8 143 8.9 7.8 114
Elkhead Divide 8800 8.4 -M * -M -M *
Little Snake River 8928 8.7 9.0 97 13.0 13.8 94
Old Battle 9860 10.2 11.3 90 12.0 13.5 89
Sage Creek Basin 7850 5.8 4.4 132 7.0 5.7 123
Sandstone RS 8152 6.1 4.2 145 7.9 7.4 107
Whiskey Park 9020 10.8 8.7 124 11.5 11.1 104
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Basin Index (%) 118 106
UPPER GREEN RIVER
Big Sandy Opening 9080 5.7 5.0 114 5.7 5.2 110
Blind Bull Sum 8650 7.7 8.4 92 5.5 7.8 71
East Rim Divide 7930 4.0 3.8 105 4.1 4.7 87
Elkhart Park G.S. 9400 4.8 4.6 104 4.2 5.9 71
Gros Ventre Summit 8750 5.1 5.2 98 5.5 5.6 98
Gunsight Pass 9820 5.4 5.0 108 5.5 6.4 86
Indian Creek 9425 8.4 8.2 102 7.1 8.0 89
Kendall R.S. 7740 4.2 4.4 95 4.7 5.8 81
Larsen Creek 9000 3.3 2.8 118 5.6 5.5 102
Loomis Park 8240 5.8 5.5 105 6.0 7.0 86
New Fork Lake 8340 4.5 4.1 110 -M 4.5 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.1 4.6 89 5.3 5.7 93
Spring Creek Divide 9000 -M 8.4 * -M 9.2 *
Triple Peak 8500 8.5 8.0 106 9.0 9.6 94
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Basin Index (%) 103 88
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.8 3.1 187 6.0 5.4 111
Buck Pasture 9632 7.3 -M * 8.6 -M *
EF Blacks Fork GS 9360 7.2 3.8 189 5.0 5.0 100
Hams Fork 7840 4.1 4.1 100 3.9 4.8 81
Henrys Fork 10182 -M -M * 6.1 -M *
Hewinta 9500 4.7 3.2 147 6.6 6.1 108
Hickerson Park 9122 4.2 2.4 175 5.1 4.7 109
Hole-in-Rock 9168 3.1 2.8 111 4.9 4.6 107
Indian Creek 9425 8.4 8.2 102 7.1 8.0 89
Kelley R.S. 8180 6.3 5.4 117 6.5 7.0 93
Spirit Lk 10235 7.8 4.7 166 7.9 7.3 108
Steel Creek Park 10158 8.1 5.5 147 8.1 6.8 119
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Basin Index (%) 138 102
UPPER BEAR RIVER
Bear River RS 8777 4.8 3.3 145 5.9 5.2 113
Bug Lake 7987 7.7 5.7 135 7.3 7.4 99
Burts Miller Ranch 8000 3.6 2.4 150 6.4 3.4 188
Chalk Creek #1 9171 9.4 8.1 116 10.1 9.4 107
Giveout 6930 3.3 2.8 118 4.6 5.3 87
Hayden Fork 9130 6.0 4.8 125 9.2 8.2 112
Kelley R.S. 8180 6.3 5.4 117 6.5 7.0 93
Lily Lake 9133 6.2 4.5 138 6.4 6.9 93
Monte Cristo 8932 11.2 8.9 126 12.0 9.9 121
Salt River Summit 7640 5.5 4.3 128 5.6 6.0 93
Spring Creek Divide 9000 -M 8.4 * -M 9.2 *
Trial Lake 9992 9.3 7.5 124 10.1 8.6 117
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Basin Index (%) 127 109
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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.
