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 THURSDAY: DECEMBER 22 , 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 6.6 6.0 110 7.7 9.0 86
Blind Bull Sum 8650 7.4 8.2 90 5.3 7.6 70
Cottonwood Creek 7670 7.6 7.4 103 8.1 9.2 88
East Rim Divide 7930 3.7 3.6 103 3.7 4.6 80
Grand Targhee 9260 18.2 17.4 105 10.8 13.9 78
Granite Creek 6770 5.7 5.2 110 5.3 7.8 68
Grassy Lake 7265 11.2 10.2 110 14.6 13.4 109
Gros Ventre Summit 8750 4.9 5.0 98 4.9 5.6 88
Gunsight Pass 9820 5.1 4.8 106 4.9 6.2 79
Lewis Lake Divide 7850 13.6 10.4 131 16.4 13.4 122
Loomis Park 8240 5.6 5.2 108 5.9 6.7 88
Phillips Bench 8200 10.2 8.4 121 10.9 10.0 109
Salt River Summit 7640 5.3 4.0 132 5.3 5.8 91
Snake River Station 6920 7.4 5.4 137 9.4 9.4 100
Somsen Ranch 6800 5.9 3.6 164 7.1 6.8 104
Spring Creek Divide 9000 -M 7.8 * -M 8.7 *
Thumb Divide 7980 8.9 5.4 165 8.6 7.4 116
Togwotee Pass 9580 8.8 9.8 90 8.9 9.8 91
Triple Peak 8500 8.3 7.7 108 8.5 9.4 90
Two Ocean Plateau 9240 14.1 11.8 119 11.0 10.8 102
Willow Creek 8080 10.8 9.4 115 11.7 13.1 89
Younts Peak 8350 5.7 5.7 100 5.3 6.4 83
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Basin Index (%) 113 94
MADISON HEADWATERS IN WYOMING
Black Bear 8170 16.6 14.0 119 17.0 15.2 112
Canyon 7870 -M -M * 7.6 -M *
Madison Plateau 7750 11.7 8.0 146 13.3 10.4 128
West Yellowstone 6700 6.6 3.8 174 9.1 5.9 154
Whiskey Creek 6800 8.0 5.0 160 10.5 8.2 128
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Basin Index (%) 139 126
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 7.7 8.8 88 6.8 8.2 83
Canyon 7870 -M -M * 7.6 -M *
Evening Star 9200 10.4 10.4 100 12.3 12.6 98
Fisher Creek 9100 14.5 13.2 110 15.3 13.0 118
Monument Peak 8850 8.2 8.0 102 10.4 9.2 113
Northeast Entrance 7350 3.8 3.0 127 6.2 5.8 107
Parker Peak 9400 9.2 8.8 105 9.2 9.0 102
Sylvan Lake 8420 7.6 7.6 100 9.2 10.2 90
Thumb Divide 7980 8.9 5.4 165 8.6 7.4 116
Two Ocean Plateau 9240 14.1 11.8 119 11.0 10.8 102
White Mill 8700 10.6 9.4 113 10.5 9.4 112
Wolverine 7650 5.0 4.2 119 5.4 5.4 100
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Basin Index (%) 110 104
WIND RIVER
Burroughs Creek 8750 3.6 -M * 4.8 -M *
Castle Creek 8400 2.5 3.0 83 2.9 4.2 69
Cold Springs 9630 3.6 3.3 109 4.6 4.3 107
Deer Park 9700 9.5 5.2 183 9.6 6.9 139
Hobbs Park 10100 7.0 5.6 125 6.4 5.2 123
Kirwin 9550 4.0 4.8 83 5.3 5.2 102
Little Warm 9370 4.3 3.9 110 4.8 5.6 86
South Pass 9040 7.2 5.4 133 5.5 6.6 83
St. Lawrence Alt 8620 2.7 -M * 4.1 -M *
Togwotee Pass 9580 8.8 9.8 90 8.9 9.8 91
Townsend Creek 8700 4.1 3.2 128 4.9 5.1 96
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Basin Index (%) 115 100
BIGHORN BASIN
Bald Mtn. 9380 6.8 7.4 92 4.8 7.0 69
Bear Trap Meadow 8200 3.4 2.5 136 3.4 4.0 85
Bone Springs Div 9350 -M 6.4 * 4.4 6.4 69
Grave Springs 8550 4.0 2.8 143 4.7 4.0 118
Kirwin 9550 4.0 4.8 83 5.3 5.2 102
Marquette 8760 -M 3.3 * 3.3 4.4 75
Middle Powder 7760 4.9 3.8 129 4.3 4.6 93
Owl Creek 8975 2.9 2.3 126 3.1 3.0 103
Powder River Pass 9480 4.2 4.4 95 5.3 5.6 95
Shell Creek 9580 4.7 6.6 71 5.5 5.8 95
Timber Creek 7950 2.5 1.9 132 1.8 3.8 47
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Basin Index (%) 102 85
SHOSHONE RIVER
Blackwater 9780 9.3 9.9 94 8.7 9.4 93
Evening Star 9200 10.4 10.4 100 12.3 12.6 98
Marquette 8760 -M 3.3 * 3.3 4.4 75
Sylvan Lake 8420 7.6 7.6 100 9.2 10.2 90
Sylvan Road 7120 4.2 4.8 88 6.7 7.9 85
Younts Peak 8350 5.7 5.7 100 5.3 6.4 83
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Basin Index (%) 97 89
POWDER RIVER
Bear Trap Meadow 8200 3.4 2.5 136 3.4 4.0 85
Cloud Peak Reservoir 9860 6.4 5.5 116 6.1 5.8 105
Grave Springs 8550 4.0 2.8 143 4.7 4.0 118
Hansen Sawmill 8360 3.0 2.6 115 3.5 3.8 92
Middle Powder 7760 4.9 3.8 129 4.3 4.6 93
Powder River Pass 9480 4.2 4.4 95 5.3 5.6 95
Soldier Park 8720 .8 2.0 40 2.0 3.9 51
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Basin Index (%) 113 92
TONGUE RIVER
Big Goose 7990 -M 2.9 * 4.4 4.4 100
Bone Springs Div 9350 -M 6.4 * 4.4 6.4 69
Burgess Junction 7880 4.6 3.7 124 5.7 5.0 114
Dome Lake 8880 3.0 4.2 71 5.0 5.4 93
Little Goose 8870 4.0 3.4 118 5.0 5.2 96
Sucker Creek 8880 4.8 4.6 104 6.4 5.6 114
Tie Creek 6870 2.8 1.6 175 5.3 4.8 110
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Basin Index (%) 110 98
BELLE FOURCHE
Blind Park 6890 3.5 2.6 135 4.1 4.5 91
Cole Canyon 5910 2.2 1.6 138 2.0 3.6 56
North Rapid Creek 6130 -M 2.6 * 3.3 3.4 97
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Basin Index (%) 136 82
CHEYENNE RIVER BASIN
Blind Park 6890 3.5 2.6 135 4.1 4.5 91
North Rapid Creek 6130 -M 2.6 * 3.3 3.4 97
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Basin Index (%) 135 94
UPPER N. PLATTE
Arapaho Ridge 10976 8.3 8.8 94 8.6 9.0 96
Blackhall Mtn 9839 10.7 11.0 97 11.8 12.1 98
Cinnabar Park 9707 -M 7.2 * 7.1 9.2 77
Columbine 9167 8.0 7.5 107 8.8 9.4 94
Divide Peak 8730 7.3 6.5 112 9.2 8.9 103
Joe Wright 10158 7.9 7.4 107 10.6 10.4 102
Laprele Creek 8390 2.8 3.2 88 3.1 4.8 65
Med Bow 10512 10.3 -M * 10.6 -M *
Never Summer 10323 9.6 7.5 128 6.5 7.6 86
North French Creek 10153 8.6 9.8 88 8.8 10.2 86
Old Battle 9860 10.0 10.7 93 11.7 13.0 90
Rawah 9069 5.9 4.2 140 7.1 7.0 101
Sage Creek Basin 7850 5.6 4.3 130 6.9 5.6 123
Sand Lake 10098 8.3 9.8 85 8.7 9.8 89
South Brush Creek 8495 5.7 4.1 139 5.2 5.5 95
Tower 10620 14.6 14.4 101 15.0 15.8 95
Webber Springs 9260 7.6 8.0 95 8.2 10.3 80
Whiskey Park 9020 10.7 8.4 127 11.3 10.8 105
Willow Creek Pass 9523 5.9 5.2 113 6.7 5.9 114
Zirkel 9338 8.3 8.4 99 10.4 12.0 87
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Basin Index (%) 105 93
SWEETWATER
Deer Park 9700 9.5 5.2 183 9.6 6.9 139
Larsen Creek 9000 2.9 2.7 107 5.4 5.4 100
South Pass 9040 7.2 5.4 133 5.5 6.6 83
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Basin Index (%) 147 108
LOWER N. PLATTE
Casper Mtn. 7920 3.9 4.8 81 3.6 5.8 62
Laprele Creek 8390 2.8 3.2 88 3.1 4.8 65
Reno Hill 8430 4.3 5.3 81 6.1 5.8 105
Windy Peak 7915 -M 2.8 * -M 4.4 *
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Basin Index (%) 83 78
LARAMIE RIVER
Brooklyn Lake 10250 6.5 7.2 90 7.6 7.4 103
Cinnabar Park 9707 -M 7.2 * 7.1 9.2 77
Crow Creek 8335 1.4 3.4 41 3.1 4.6 67
Deadman Hill 10239 6.8 7.0 97 6.5 7.2 90
Rawah 9069 5.9 4.2 140 7.1 7.0 101
Roach 9740 5.8 5.6 104 4.8 7.7 62
Windy Peak 7915 -M 2.8 * -M 4.4 *
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Basin Index (%) 96 84
S. PLATTE
Crow Creek 8335 1.4 3.4 41 3.1 4.6 67
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Basin Index (%) 41 67
LITTLE SNAKE RIVER
Battle Mountain 7498 5.5 3.6 153 8.5 6.0 142
Divide Peak 8730 7.3 6.5 112 9.2 8.9 103
Elk River 8739 8.2 5.8 141 8.7 7.4 118
Elkhead Divide 8800 8.3 -M * -M -M *
Little Snake River 8928 8.6 8.0 108 12.8 13.3 96
Old Battle 9860 10.0 10.7 93 11.7 13.0 90
Sage Creek Basin 7850 5.6 4.3 130 6.9 5.6 123
Sandstone RS 8152 6.0 4.1 146 7.7 7.1 108
Whiskey Park 9020 10.7 8.4 127 11.3 10.8 105
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Basin Index (%) 120 107
UPPER GREEN RIVER
Big Sandy Opening 9080 5.4 4.7 115 5.4 5.0 108
Blind Bull Sum 8650 7.4 8.2 90 5.3 7.6 70
East Rim Divide 7930 3.7 3.6 103 3.7 4.6 80
Elkhart Park G.S. 9400 4.5 4.6 98 3.9 5.7 68
Gros Ventre Summit 8750 4.9 5.0 98 4.9 5.6 88
Gunsight Pass 9820 5.1 4.8 106 4.9 6.2 79
Indian Creek 9425 8.1 8.1 100 6.8 7.8 87
Kendall R.S. 7740 4.1 4.3 95 4.6 5.5 84
Larsen Creek 9000 2.9 2.7 107 5.4 5.4 100
Loomis Park 8240 5.6 5.2 108 5.9 6.7 88
New Fork Lake 8340 4.3 3.9 110 -M 4.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.8 4.2 90 5.0 5.4 93
Spring Creek Divide 9000 -M 7.8 * -M 8.7 *
Triple Peak 8500 8.3 7.7 108 8.5 9.4 90
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Basin Index (%) 102 86
LOWER GREEN RIVER
Blacks Fork Jct 8869 5.8 2.8 207 6.0 5.2 115
Buck Pasture 9632 7.2 -M * 8.5 -M *
EF Blacks Fork GS 9360 7.1 3.4 209 5.8 4.8 121
Hams Fork 7840 3.7 3.8 97 3.7 4.6 80
Henrys Fork 10182 -M -M * 5.7 -M *
Hewinta 9500 4.7 3.0 157 6.5 5.8 112
Hickerson Park 9122 4.1 2.4 171 5.1 4.7 109
Hole-in-Rock 9168 3.1 2.6 119 4.7 4.5 104
Indian Creek 9425 8.1 8.1 100 6.8 7.8 87
Kelley R.S. 8180 5.9 5.0 118 6.2 6.7 93
Spirit Lk 10235 7.8 4.6 170 7.8 7.2 108
Steel Creek Park 10158 8.1 5.4 150 8.0 6.6 121
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Basin Index (%) 142 105
UPPER BEAR RIVER
Bear River RS 8777 4.8 3.2 150 5.8 5.1 114
Bug Lake 7987 7.6 5.6 136 6.8 7.0 97
Burts Miller Ranch 8000 3.6 2.2 164 6.3 3.4 185
Chalk Creek #1 9171 9.3 7.8 119 9.9 9.4 105
Giveout 6930 3.1 2.8 111 4.3 5.2 83
Hayden Fork 9130 6.1 4.4 139 9.1 7.8 117
Kelley R.S. 8180 5.9 5.0 118 6.2 6.7 93
Lily Lake 9133 6.1 4.5 136 6.4 6.8 94
Monte Cristo 8932 11.5 8.4 137 11.6 9.6 121
Salt River Summit 7640 5.3 4.0 132 5.3 5.8 91
Spring Creek Divide 9000 -M 7.8 * -M 8.7 *
Trial Lake 9992 9.3 7.0 133 9.9 8.2 121
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Basin Index (%) 132 109
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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.
