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 17 , 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 6.0 5.5 109 7.1 8.5 84
Blind Bull Sum 8650 6.2 7.7 81 4.8 6.9 70
Cottonwood Creek 7670 6.8 6.6 103 7.4 8.8 84
East Rim Divide 7930 3.1 3.2 97 3.3 4.3 77
Grand Targhee 9260 17.2 16.2 106 10.7 13.2 81
Granite Creek 6770 5.0 4.6 109 4.6 7.0 66
Grassy Lake 7265 10.0 9.3 108 13.4 11.9 113
Gros Ventre Summit 8750 4.4 4.8 92 4.5 5.2 87
Gunsight Pass 9820 4.7 4.6 102 4.9 5.8 84
Lewis Lake Divide 7850 11.9 9.4 127 14.6 12.0 122
Loomis Park 8240 4.7 4.8 98 5.1 6.1 84
Phillips Bench 8200 9.1 8.2 111 9.9 9.4 105
Salt River Summit 7640 4.6 3.6 128 4.6 5.5 84
Snake River Station 6920 6.6 5.0 132 8.8 8.9 99
Somsen Ranch 6800 5.5 3.4 162 6.8 6.2 110
Spring Creek Divide 9000 6.4 7.6 84 7.4 8.2 90
Thumb Divide 7980 8.1 4.7 172 8.2 7.0 117
Togwotee Pass 9580 8.1 9.0 90 8.1 9.4 86
Triple Peak 8500 7.0 7.0 100 7.3 8.4 87
Two Ocean Plateau 9240 12.8 11.0 116 10.0 10.3 97
Willow Creek 8080 9.7 8.6 113 10.8 12.2 89
Younts Peak 8350 5.1 5.2 98 5.3 5.8 91
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Basin Index (%) 109 93
MADISON HEADWATERS IN WYOMING
Black Bear 8170 15.5 12.8 121 16.3 13.8 118
Canyon 7870 5.8 -M * 7.5 -M *
Madison Plateau 7750 11.1 7.3 152 12.8 9.6 133
West Yellowstone 6700 6.1 3.4 179 8.7 5.8 150
Whiskey Creek 6800 7.7 4.4 175 11.2 7.5 149
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Basin Index (%) 145 134
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 7.1 8.0 89 6.2 7.7 81
Canyon 7870 5.8 -M * 7.5 -M *
Evening Star 9200 9.1 9.4 97 11.4 11.8 97
Fisher Creek 9100 12.8 11.8 108 14.0 12.0 117
Monument Peak 8850 7.9 7.2 110 10.1 8.6 117
Northeast Entrance 7350 3.6 2.8 129 6.0 5.4 111
Parker Peak 9400 7.8 8.2 95 9.0 8.2 110
Sylvan Lake 8420 7.1 7.0 101 9.4 9.6 98
Thumb Divide 7980 8.1 4.7 172 8.2 7.0 117
Two Ocean Plateau 9240 12.8 11.0 116 10.0 10.3 97
White Mill 8700 9.7 8.4 115 9.9 8.8 112
Wolverine 7650 4.0 4.0 100 5.3 5.2 102
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Basin Index (%) 109 105
WIND RIVER
Burroughs Creek 8750 3.3 -M * 4.3 -M *
Castle Creek 8400 2.1 2.6 81 2.8 4.0 70
Cold Springs 9630 3.2 3.1 103 4.4 4.0 110
Deer Park 9700 8.4 5.1 165 8.6 6.6 130
Hobbs Park 10100 6.5 5.2 125 5.9 5.0 118
Kirwin 9550 3.3 4.5 73 4.7 5.1 92
Little Warm 9370 3.9 3.6 108 4.6 5.2 88
South Pass 9040 6.3 5.0 126 5.3 6.3 84
St. Lawrence Alt 8620 2.3 -M * 3.8 -M *
Togwotee Pass 9580 8.1 9.0 90 8.1 9.4 86
Townsend Creek 8700 3.6 3.2 112 4.4 4.9 90
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Basin Index (%) 110 97
BIGHORN BASIN
Bald Mtn. 9380 6.8 7.0 97 5.8 6.4 91
Bear Trap Meadow 8200 3.3 2.3 143 4.1 3.8 108
Bone Springs Div 9350 4.3 6.2 69 4.8 6.0 80
Grave Springs 8550 4.0 2.5 160 4.6 3.8 121
Kirwin 9550 3.3 4.5 73 4.7 5.1 92
Marquette 8760 2.4 3.2 75 3.1 4.2 74
Middle Powder 7760 5.3 3.3 161 4.8 4.4 109
Owl Creek 8975 2.8 2.2 127 3.2 2.9 110
Powder River Pass 9480 4.0 4.2 95 5.2 5.3 98
Shell Creek 9580 4.8 6.2 77 5.6 5.6 100
Timber Creek 7950 1.8 1.9 95 2.0 3.8 53
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Basin Index (%) 98 93
SHOSHONE RIVER
Blackwater 9780 8.4 9.2 91 8.1 8.8 92
Evening Star 9200 9.1 9.4 97 11.4 11.8 97
Marquette 8760 2.4 3.2 75 3.1 4.2 74
Sylvan Lake 8420 7.1 7.0 101 9.4 9.6 98
Sylvan Road 7120 4.0 4.4 91 6.4 7.4 86
Younts Peak 8350 5.1 5.2 98 5.3 5.8 91
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Basin Index (%) 94 92
POWDER RIVER
Bear Trap Meadow 8200 3.3 2.3 143 4.1 3.8 108
Cloud Peak Reservoir 9860 5.7 5.2 110 5.8 5.6 104
Grave Springs 8550 4.0 2.5 160 4.6 3.8 121
Hansen Sawmill 8360 3.1 2.4 129 3.5 3.7 95
Middle Powder 7760 5.3 3.3 161 4.8 4.4 109
Powder River Pass 9480 4.0 4.2 95 5.2 5.3 98
Soldier Park 8720 1.4 2.0 70 2.9 3.8 76
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Basin Index (%) 122 102
TONGUE RIVER
Big Goose 7990 3.9 2.8 139 4.6 4.3 107
Bone Springs Div 9350 4.3 6.2 69 4.8 6.0 80
Burgess Junction 7880 4.9 3.5 140 6.5 4.8 135
Dome Lake 8880 3.2 3.8 84 4.9 5.1 96
Little Goose 8870 4.2 3.2 131 5.1 5.1 100
Sucker Creek 8880 4.9 4.4 111 6.8 5.4 126
Tie Creek 6870 3.0 1.4 214 5.5 4.6 120
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Basin Index (%) 112 108
BELLE FOURCHE
Blind Park 6890 3.2 2.4 133 4.6 4.4 105
Cole Canyon 5910 2.4 1.6 150 3.7 3.4 109
North Rapid Creek 6130 3.4 2.4 142 3.9 3.3 118
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Basin Index (%) 141 110
CHEYENNE RIVER BASIN
Blind Park 6890 3.2 2.4 133 4.6 4.4 105
North Rapid Creek 6130 3.4 2.4 142 3.9 3.3 118
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Basin Index (%) 138 110
UPPER N. PLATTE
Arapaho Ridge 10976 7.1 7.9 90 7.8 8.6 91
Blackhall Mtn 9839 10.1 9.8 103 11.2 11.6 97
Cinnabar Park 9707 -M 6.9 * 6.7 8.7 77
Columbine 9167 7.3 6.0 122 7.7 8.6 90
Divide Peak 8730 7.1 5.8 122 9.0 8.0 112
Joe Wright 10158 7.4 7.0 106 10.2 9.7 105
Laprele Creek 8390 2.6 2.7 96 2.9 4.6 63
Med Bow 10512 9.3 -M * 9.9 -M *
Never Summer 10323 9.2 6.8 135 6.2 6.8 91
North French Creek 10153 8.0 9.1 88 8.3 9.4 88
Old Battle 9860 9.4 9.8 96 11.0 12.2 90
Rawah 9069 5.6 3.7 151 7.0 6.6 106
Sage Creek Basin 7850 5.3 4.0 132 6.7 5.4 124
Sand Lake 10098 7.7 9.2 84 8.5 9.2 92
South Brush Creek 8495 5.4 3.6 150 5.0 5.4 93
Tower 10620 14.3 13.5 106 14.3 14.2 101
Webber Springs 9260 7.1 7.4 96 7.7 9.7 79
Whiskey Park 9020 10.6 7.6 139 10.9 10.0 109
Willow Creek Pass 9523 5.5 4.8 115 6.0 5.4 111
Zirkel 9338 7.7 7.6 101 9.8 11.0 89
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Basin Index (%) 109 95
SWEETWATER
Deer Park 9700 8.4 5.1 165 8.6 6.6 130
Larsen Creek 9000 2.3 2.6 88 4.7 4.6 102
South Pass 9040 6.3 5.0 126 5.3 6.3 84
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Basin Index (%) 134 106
LOWER N. PLATTE
Casper Mtn. 7920 3.6 4.3 84 3.6 5.8 62
Laprele Creek 8390 2.6 2.7 96 2.9 4.6 63
Reno Hill 8430 4.4 4.8 92 6.0 5.4 111
Windy Peak 7915 -M 2.4 * -M 4.1 *
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Basin Index (%) 90 79
LARAMIE RIVER
Brooklyn Lake 10250 5.9 6.7 88 7.0 7.0 100
Cinnabar Park 9707 -M 6.9 * 6.7 8.7 77
Crow Creek 8335 1.5 3.2 47 3.1 4.3 72
Deadman Hill 10239 6.1 6.2 98 6.0 6.6 91
Rawah 9069 5.6 3.7 151 7.0 6.6 106
Roach 9740 5.5 5.3 104 6.2 7.1 87
Windy Peak 7915 -M 2.4 * -M 4.1 *
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Basin Index (%) 98 89
S. PLATTE
Crow Creek 8335 1.5 3.2 47 3.1 4.3 72
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Basin Index (%) 47 72
LITTLE SNAKE RIVER
Battle Mountain 7498 5.3 3.2 166 8.3 5.6 148
Divide Peak 8730 7.1 5.8 122 9.0 8.0 112
Elk River 8739 8.0 4.8 167 8.4 6.6 127
Elkhead Divide 8800 8.0 -M * -M -M *
Little Snake River 8928 8.2 7.2 114 12.1 12.0 101
Old Battle 9860 9.4 9.8 96 11.0 12.2 90
Sage Creek Basin 7850 5.3 4.0 132 6.7 5.4 124
Sandstone RS 8152 5.9 3.6 164 7.4 6.6 112
Whiskey Park 9020 10.6 7.6 139 10.9 10.0 109
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Basin Index (%) 130 111
UPPER GREEN RIVER
Big Sandy Opening 9080 4.6 4.5 102 4.7 4.6 102
Blind Bull Sum 8650 6.2 7.7 81 4.8 6.9 70
East Rim Divide 7930 3.1 3.2 97 3.3 4.3 77
Elkhart Park G.S. 9400 4.0 4.2 95 3.7 5.2 71
Gros Ventre Summit 8750 4.4 4.8 92 4.5 5.2 87
Gunsight Pass 9820 4.7 4.6 102 4.9 5.8 84
Indian Creek 9425 7.3 7.4 99 6.2 7.2 86
Kendall R.S. 7740 3.3 3.8 87 3.8 5.2 73
Larsen Creek 9000 2.3 2.6 88 4.7 4.6 102
Loomis Park 8240 4.7 4.8 98 5.1 6.1 84
New Fork Lake 8340 3.5 3.7 95 -M 4.2 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.1 3.6 86 4.3 4.9 88
Spring Creek Divide 9000 6.4 7.6 84 7.4 8.2 90
Triple Peak 8500 7.0 7.0 100 7.3 8.4 87
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Basin Index (%) 93 84
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.1 2.4 212 5.3 4.8 110
Buck Pasture 9632 6.1 -M * 7.8 -M *
EF Blacks Fork GS 9360 6.2 3.1 200 4.2 4.6 91
Hams Fork 7840 3.1 3.4 91 3.5 4.4 80
Henrys Fork 10182 -M -M * 5.9 -M *
Hewinta 9500 3.9 2.8 139 5.7 5.5 104
Hickerson Park 9122 3.9 2.0 195 5.0 4.5 111
Hole-in-Rock 9168 2.6 2.2 118 4.4 4.2 105
Indian Creek 9425 7.3 7.4 99 6.2 7.2 86
Kelley R.S. 8180 5.0 4.5 111 5.6 6.0 93
Spirit Lk 10235 7.2 4.2 171 7.3 6.8 107
Steel Creek Park 10158 7.3 5.0 146 7.3 6.4 114
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Basin Index (%) 139 100
UPPER BEAR RIVER
Bear River RS 8777 4.2 2.6 162 5.2 4.8 108
Bug Lake 7987 7.1 5.0 142 -M 6.6 *
Burts Miller Ranch 8000 3.3 2.1 157 5.9 3.3 179
Chalk Creek #1 9171 8.6 7.1 121 9.2 8.5 108
Giveout 6930 2.8 2.6 108 3.8 4.7 81
Hayden Fork 9130 5.4 4.0 135 8.2 7.4 111
Kelley R.S. 8180 5.0 4.5 111 5.6 6.0 93
Lily Lake 9133 4.7 4.3 109 6.0 6.4 94
Monte Cristo 8932 10.8 7.2 150 11.4 8.7 131
Salt River Summit 7640 4.6 3.6 128 4.6 5.5 84
Spring Creek Divide 9000 6.4 7.6 84 7.4 8.2 90
Trial Lake 9992 8.2 6.0 137 9.2 7.3 126
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Basin Index (%) 126 108
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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.
