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 13 , 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 6.1 4.8 127 7.0 8.0 88
Blind Bull Sum 8650 6.3 7.0 90 4.7 6.6 71
Cottonwood Creek 7670 6.7 6.2 108 7.3 8.2 89
East Rim Divide 7930 3.2 2.9 110 3.5 4.0 88
Grand Targhee 9260 17.0 15.2 112 10.6 12.8 83
Granite Creek 6770 5.0 4.1 122 4.8 6.6 73
Grassy Lake 7265 10.1 8.2 123 13.3 11.6 115
Gros Ventre Summit 8750 4.5 4.4 102 4.6 5.0 92
Gunsight Pass 9820 4.7 4.0 118 4.9 5.4 91
Lewis Lake Divide 7850 12.0 8.7 138 14.6 11.7 125
Loomis Park 8240 4.8 4.4 109 5.1 5.9 86
Phillips Bench 8200 9.3 7.4 126 9.9 9.0 110
Salt River Summit 7640 4.6 3.2 144 4.7 5.3 89
Snake River Station 6920 6.6 4.6 143 8.8 8.1 109
Somsen Ranch 6800 5.4 3.0 180 6.8 6.0 113
Spring Creek Divide 9000 -M 6.8 * -M 7.7 *
Thumb Divide 7980 8.1 4.2 193 8.3 6.6 126
Togwotee Pass 9580 7.8 8.4 93 7.7 8.8 88
Triple Peak 8500 7.1 6.4 111 7.5 8.2 91
Two Ocean Plateau 9240 12.7 10.6 120 10.0 9.8 102
Willow Creek 8080 9.7 7.7 126 10.7 11.2 96
Younts Peak 8350 5.0 4.8 104 5.1 5.6 91
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Basin Index (%) 120 97
MADISON HEADWATERS IN WYOMING
Black Bear 8170 15.4 11.4 135 16.4 13.3 123
Canyon 7870 5.9 -M * 7.5 -M *
Madison Plateau 7750 11.0 7.0 157 12.7 9.0 141
West Yellowstone 6700 6.0 3.0 200 8.6 5.2 165
Whiskey Creek 6800 7.7 4.0 192 11.0 6.9 159
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Basin Index (%) 158 142
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 7.1 7.6 93 6.3 7.0 90
Canyon 7870 5.9 -M * 7.5 -M *
Evening Star 9200 9.0 8.8 102 11.3 11.0 103
Fisher Creek 9100 12.6 10.6 119 13.8 11.7 118
Monument Peak 8850 7.6 6.6 115 9.8 8.4 117
Northeast Entrance 7350 3.5 2.4 146 5.8 5.0 116
Parker Peak 9400 7.8 7.6 103 9.0 7.8 115
Sylvan Lake 8420 7.1 6.3 113 9.5 9.0 106
Thumb Divide 7980 8.1 4.2 193 8.3 6.6 126
Two Ocean Plateau 9240 12.7 10.6 120 10.0 9.8 102
White Mill 8700 9.6 7.6 126 9.9 8.4 118
Wolverine 7650 4.0 3.6 111 5.4 4.6 117
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Basin Index (%) 117 111
WIND RIVER
Burroughs Creek 8750 3.3 -M * 4.3 -M *
Castle Creek 8400 2.2 2.4 92 3.1 3.6 86
Cold Springs 9630 3.0 2.7 111 4.0 4.0 100
Deer Park 9700 8.0 4.8 167 8.4 6.2 135
Hobbs Park 10100 6.1 5.0 122 5.6 4.9 114
Kirwin 9550 3.1 4.0 78 4.5 5.0 90
Little Warm 9370 3.9 3.4 115 4.6 4.8 96
South Pass 9040 5.9 4.8 123 4.8 5.6 86
St. Lawrence Alt 8620 2.0 -M * 3.6 -M *
Togwotee Pass 9580 7.8 8.4 93 7.7 8.8 88
Townsend Creek 8700 3.3 3.0 110 4.0 4.7 85
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Basin Index (%) 112 98
BIGHORN BASIN
Bald Mtn. 9380 6.0 6.6 91 5.6 6.0 93
Bear Trap Meadow 8200 3.1 2.1 148 4.0 3.6 111
Bone Springs Div 9350 4.0 5.8 69 4.5 5.6 80
Grave Springs 8550 3.6 2.3 157 4.1 3.7 111
Kirwin 9550 3.1 4.0 78 4.5 5.0 90
Marquette 8760 2.2 3.0 73 2.9 4.2 69
Middle Powder 7760 4.7 3.0 157 4.5 4.2 107
Owl Creek 8975 2.7 2.1 129 3.2 2.8 114
Powder River Pass 9480 3.7 3.9 95 5.0 5.1 98
Shell Creek 9580 4.2 5.9 71 5.3 5.1 104
Timber Creek 7950 1.6 1.8 89 2.0 3.4 59
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Basin Index (%) 96 94
SHOSHONE RIVER
Blackwater 9780 8.5 9.0 94 8.2 8.3 99
Evening Star 9200 9.0 8.8 102 11.3 11.0 103
Marquette 8760 2.2 3.0 73 2.9 4.2 69
Sylvan Lake 8420 7.1 6.3 113 9.5 9.0 106
Sylvan Road 7120 4.0 3.9 103 6.3 7.0 90
Younts Peak 8350 5.0 4.8 104 5.1 5.6 91
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Basin Index (%) 100 96
POWDER RIVER
Bear Trap Meadow 8200 3.1 2.1 148 4.0 3.6 111
Cloud Peak Reservoir 9860 4.7 4.8 98 5.0 5.3 94
Grave Springs 8550 3.6 2.3 157 4.1 3.7 111
Hansen Sawmill 8360 2.7 2.3 117 3.1 3.3 94
Middle Powder 7760 4.7 3.0 157 4.5 4.2 107
Powder River Pass 9480 3.7 3.9 95 5.0 5.1 98
Soldier Park 8720 1.0 1.7 59 2.6 3.8 68
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Basin Index (%) 117 98
TONGUE RIVER
Big Goose 7990 3.1 2.6 119 3.9 4.1 95
Bone Springs Div 9350 4.0 5.8 69 4.5 5.6 80
Burgess Junction 7880 4.4 3.4 129 5.8 4.5 129
Dome Lake 8880 2.5 3.6 69 4.2 5.0 84
Little Goose 8870 3.4 2.7 126 4.3 4.6 93
Sucker Creek 8880 4.2 4.0 105 5.9 5.3 111
Tie Creek 6870 2.5 1.5 167 4.9 4.4 111
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Basin Index (%) 102 100
BELLE FOURCHE
Blind Park 6890 2.1 2.0 105 3.2 4.0 80
Cole Canyon 5910 1.1 1.4 79 1.8 3.4 53
North Rapid Creek 6130 1.6 2.2 73 2.5 3.2 78
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Basin Index (%) 86 71
CHEYENNE RIVER BASIN
Blind Park 6890 2.1 2.0 105 3.2 4.0 80
North Rapid Creek 6130 1.6 2.2 73 2.5 3.2 78
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Basin Index (%) 88 79
UPPER N. PLATTE
Arapaho Ridge 10976 6.8 7.0 97 7.4 8.0 92
Blackhall Mtn 9839 8.7 8.9 98 9.8 10.5 93
Cinnabar Park 9707 -M 6.7 * 6.1 8.0 76
Columbine 9167 6.4 5.8 110 7.2 8.1 89
Divide Peak 8730 6.4 5.6 114 8.3 7.6 109
Joe Wright 10158 6.1 6.6 92 8.6 9.3 92
Laprele Creek 8390 2.0 2.4 83 2.3 4.4 52
Med Bow 10512 8.1 -M * 8.7 -M *
Never Summer 10323 8.1 6.1 133 5.6 6.4 88
North French Creek 10153 7.2 8.4 86 7.5 9.0 83
Old Battle 9860 8.7 9.2 95 10.5 11.5 91
Rawah 9069 4.7 3.5 134 5.8 6.1 95
Sage Creek Basin 7850 4.8 3.9 123 6.0 5.0 120
Sand Lake 10098 6.7 8.6 78 7.4 8.2 90
South Brush Creek 8495 4.1 3.4 121 4.2 5.1 82
Tower 10620 12.6 13.0 97 13.0 13.4 97
Webber Springs 9260 6.5 6.7 97 7.4 9.2 80
Whiskey Park 9020 9.9 7.2 138 10.2 9.6 106
Willow Creek Pass 9523 4.9 4.6 107 5.6 5.2 108
Zirkel 9338 7.4 6.8 109 9.3 10.2 91
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Basin Index (%) 104 92
SWEETWATER
Deer Park 9700 8.0 4.8 167 8.4 6.2 135
Larsen Creek 9000 2.3 2.2 105 4.7 4.5 104
South Pass 9040 5.9 4.8 123 4.8 5.6 86
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Basin Index (%) 137 110
LOWER N. PLATTE
Casper Mtn. 7920 2.8 4.0 70 3.2 5.4 59
Laprele Creek 8390 2.0 2.4 83 2.3 4.4 52
Reno Hill 8430 3.5 4.4 80 5.0 5.2 96
Windy Peak 7915 1.2 2.1 57 2.2 3.9 56
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Basin Index (%) 74 67
LARAMIE RIVER
Brooklyn Lake 10250 5.3 5.9 90 6.3 6.8 93
Cinnabar Park 9707 -M 6.7 * 6.1 8.0 76
Crow Creek 8335 1.1 3.0 37 2.6 4.2 62
Deadman Hill 10239 5.5 5.8 95 5.2 6.0 87
Rawah 9069 4.7 3.5 134 5.8 6.1 95
Roach 9740 5.3 5.0 106 6.2 6.8 91
Windy Peak 7915 1.2 2.1 57 2.2 3.9 56
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Basin Index (%) 91 82
S. PLATTE
Crow Creek 8335 1.1 3.0 37 2.6 4.2 62
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Basin Index (%) 37 62
LITTLE SNAKE RIVER
Battle Mountain 7498 5.0 2.6 192 7.6 5.3 143
Divide Peak 8730 6.4 5.6 114 8.3 7.6 109
Elk River 8739 7.5 4.5 167 7.7 6.2 124
Elkhead Divide 8800 7.5 -M * 8.4 -M *
Little Snake River 8928 7.6 6.3 121 11.4 11.0 104
Old Battle 9860 8.7 9.2 95 10.5 11.5 91
Sage Creek Basin 7850 4.8 3.9 123 6.0 5.0 120
Sandstone RS 8152 5.2 3.2 162 6.7 6.2 108
Whiskey Park 9020 9.9 7.2 138 10.2 9.6 106
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Basin Index (%) 130 110
UPPER GREEN RIVER
Big Sandy Opening 9080 4.7 4.2 112 4.7 4.3 109
Blind Bull Sum 8650 6.3 7.0 90 4.7 6.6 71
East Rim Divide 7930 3.2 2.9 110 3.5 4.0 88
Elkhart Park G.S. 9400 4.0 3.8 105 3.7 5.0 74
Gros Ventre Summit 8750 4.5 4.4 102 4.6 5.0 92
Gunsight Pass 9820 4.7 4.0 118 4.9 5.4 91
Indian Creek 9425 7.1 6.6 108 6.2 6.6 94
Kendall R.S. 7740 3.5 3.5 100 3.8 5.0 76
Larsen Creek 9000 2.3 2.2 105 4.7 4.5 104
Loomis Park 8240 4.8 4.4 109 5.1 5.9 86
New Fork Lake 8340 3.6 3.4 106 -M 4.0 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.3 3.4 97 4.3 4.8 90
Spring Creek Divide 9000 -M 6.8 * -M 7.7 *
Triple Peak 8500 7.1 6.4 111 7.5 8.2 91
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Basin Index (%) 105 88
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.7 2.3 204 4.9 4.5 109
Buck Pasture 9632 6.0 -M * 7.2 -M *
EF Blacks Fork GS 9360 5.8 2.6 223 -M 4.5 *
Hams Fork 7840 3.4 3.0 113 3.4 4.0 85
Henrys Fork 10182 -M -M * 5.4 -M *
Hewinta 9500 3.4 2.5 136 5.2 5.4 96
Hickerson Park 9122 3.5 2.0 175 4.5 4.2 107
Hole-in-Rock 9168 2.4 2.0 120 4.2 4.0 105
Indian Creek 9425 7.1 6.6 108 6.2 6.6 94
Kelley R.S. 8180 5.2 4.0 130 5.6 5.6 100
Spirit Lk 10235 6.7 3.8 176 6.8 6.3 108
Steel Creek Park 10158 6.7 4.6 146 6.6 6.2 106
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Basin Index (%) 146 101
UPPER BEAR RIVER
Bear River RS 8777 3.7 2.4 154 4.8 4.6 104
Bug Lake 7987 7.0 4.3 163 -M 6.0 *
Burts Miller Ranch 8000 3.0 1.7 176 5.4 3.1 174
Chalk Creek #1 9171 7.8 6.4 122 8.6 8.0 108
Giveout 6930 2.9 2.0 145 3.9 4.4 89
Hayden Fork 9130 5.0 3.6 139 7.8 7.2 108
Kelley R.S. 8180 5.2 4.0 130 5.6 5.6 100
Lily Lake 9133 4.0 3.6 111 5.3 5.8 91
Monte Cristo 8932 10.2 6.3 162 10.9 8.0 136
Salt River Summit 7640 4.6 3.2 144 4.7 5.3 89
Spring Creek Divide 9000 -M 6.8 * -M 7.7 *
Trial Lake 9992 7.9 5.6 141 8.9 7.0 127
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Basin Index (%) 142 112
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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.
