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 18 , 2021
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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 -M 5.5 * -M 8.6 *
Blind Bull Sum 8650 -M 7.7 * -M 7.2 *
Cottonwood Creek 7670 -M 6.9 * -M 8.8 *
East Rim Divide 7930 -M 3.3 * -M 4.3 *
Grand Targhee 9260 14.0 16.3 86 13.5 13.4 101
Granite Creek 6770 -M 4.7 * -M 7.2 *
Grassy Lake 7265 6.9 9.7 71 13.6 12.2 111
Gros Ventre Summit 8750 2.8 4.8 58 3.9 5.2 75
Gunsight Pass 9820 4.0 4.7 85 5.4 5.8 93
Lewis Lake Divide 7850 8.1 9.7 84 14.2 12.2 116
Loomis Park 8240 2.5 5.0 50 5.3 6.2 85
Phillips Bench 8200 4.8 8.2 59 8.6 9.6 90
Salt River Summit 7640 -M 3.7 * -M 5.6 *
Snake River Station 6920 3.2 5.2 62 8.1 9.0 90
Somsen Ranch 6800 2.3 3.4 68 8.1 6.2 131
Spring Creek Divide 9000 -M 7.6 * -M 8.2 *
Thumb Divide 7980 4.3 4.8 90 7.6 7.2 106
Togwotee Pass 9580 7.2 9.1 79 8.6 9.4 91
Triple Peak 8500 5.8 7.0 83 9.5 8.6 110
Two Ocean Plateau 9240 9.7 11.0 88 8.4 10.4 81
Willow Creek 8080 6.0 8.7 69 12.4 12.4 100
Younts Peak 8350 2.1 -M * 2.2 -M *
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Basin Index (%) 76 100
MADISON HEADWATERS IN WYOMING
Black Bear 8170 12.4 13.0 95 11.8 13.8 86
Canyon 7870 2.2 -M * 5.0 -M *
Madison Plateau 7750 6.4 7.4 86 9.8 9.7 101
West Yellowstone 6700 2.8 3.4 82 6.2 5.8 107
Whiskey Creek 6800 3.7 4.4 84 8.0 7.6 105
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Basin Index (%) 90 97
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 4.2 8.2 51 3.9 7.8 50
Canyon 7870 2.2 -M * 5.0 -M *
Evening Star 9200 7.6 9.4 81 7.9 11.8 67
Fisher Creek 9100 8.9 12.0 74 10.7 12.2 88
Monument Peak 8850 5.8 7.3 79 8.4 8.6 98
Northeast Entrance 7350 .8 2.8 29 4.7 5.4 87
Parker Peak 9400 6.0 8.2 73 6.0 8.2 73
Sylvan Lake 8420 4.5 7.2 62 8.5 9.8 87
Thumb Divide 7980 4.3 4.8 90 7.6 7.2 106
Two Ocean Plateau 9240 9.7 11.0 88 8.4 10.4 81
White Mill 8700 6.5 8.8 74 7.0 8.8 80
Wolverine 7650 1.0 4.1 24 3.8 5.3 72
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Basin Index (%) 71 81
WIND RIVER
Burroughs Creek 8750 2.2 -M * 3.8 -M *
Castle Creek 8400 .4 2.6 15 1.8 4.0 45
Cold Springs 9630 4.1 3.1 132 6.0 4.0 150
Deer Park 9700 3.8 5.1 75 6.1 6.6 92
Hobbs Park 10100 4.9 5.3 92 6.9 5.0 138
Kirwin 9550 3.3 4.7 70 3.9 5.2 75
Little Warm 9370 3.7 3.6 103 5.4 5.2 104
South Pass 9040 3.4 5.2 65 5.3 6.4 83
St. Lawrence Alt 8620 .3 -M * 4.3 -M *
Togwotee Pass 9580 7.2 9.1 79 8.6 9.4 91
Townsend Creek 8700 2.5 3.2 78 5.6 5.0 112
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Basin Index (%) 79 98
BIGHORN BASIN
Bald Mtn. 9380 6.6 7.2 92 6.7 6.4 105
Bear Trap Meadow 8200 2.2 2.3 96 4.3 3.8 113
Bone Springs Div 9350 -M 6.3 * 5.4 6.0 90
Grave Springs 8550 1.7 2.6 65 4.2 3.8 111
Kirwin 9550 3.3 4.7 70 3.9 5.2 75
Marquette 8760 1.0 3.2 31 3.4 4.2 81
Middle Powder 7760 2.6 3.4 76 4.8 4.4 109
Owl Creek 8975 2.7 2.2 123 3.6 2.9 124
Powder River Pass 9480 3.8 4.3 88 3.3 5.3 62
Shell Creek 9580 5.4 6.2 87 6.0 5.6 107
Timber Creek 7950 .7 1.9 37 2.8 3.8 74
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Basin Index (%) 79 94
SHOSHONE RIVER
Blackwater 9780 6.9 9.2 75 7.7 8.8 88
Evening Star 9200 7.6 9.4 81 7.9 11.8 67
Marquette 8760 1.0 3.2 31 3.4 4.2 81
Sylvan Lake 8420 4.5 7.2 62 8.5 9.8 87
Sylvan Road 7120 1.4 4.5 31 7.0 7.6 92
Younts Peak 8350 2.1 -M * 2.2 -M *
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Basin Index (%) 64 82
POWDER RIVER
Bear Trap Meadow 8200 2.2 2.3 96 4.3 3.8 113
Cloud Peak Reservoir 9860 5.2 5.2 100 6.8 5.6 121
Grave Springs 8550 1.7 2.6 65 4.2 3.8 111
Hansen Sawmill 8360 2.7 2.5 108 4.8 3.8 126
Middle Powder 7760 2.6 3.4 76 4.8 4.4 109
Powder River Pass 9480 3.8 4.3 88 3.3 5.3 62
Soldier Park 8720 .0 2.0 0 4.5 3.9 115
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Basin Index (%) 82 107
TONGUE RIVER
Big Goose 7990 2.0 2.8 71 5.2 4.3 121
Bone Springs Div 9350 -M 6.3 * 5.4 6.0 90
Burgess Junction 7880 3.2 3.5 91 5.6 4.9 114
Dome Lake 8880 3.1 3.8 82 6.1 5.2 117
Little Goose 8870 2.9 3.3 88 6.6 5.2 127
Sucker Creek 8880 4.1 4.4 93 6.1 5.4 113
Tie Creek 6870 .6 1.4 43 5.5 4.6 120
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Basin Index (%) 83 114
BELLE FOURCHE
Blind Park 6890 1.7 2.4 71 3.8 4.4 86
Cole Canyon 5910 .3 1.6 19 4.7 3.5 134
North Rapid Creek 6130 1.2 2.4 50 2.4 3.3 73
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Basin Index (%) 50 97
CHEYENNE RIVER BASIN
Blind Park 6890 1.7 2.4 71 3.8 4.4 86
North Rapid Creek 6130 1.2 2.4 50 2.4 3.3 73
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Basin Index (%) 60 81
UPPER N. PLATTE
Arapaho Ridge 10960 6.1 8.2 74 6.2 8.7 71
Blackhall Mtn 9820 8.7 9.8 89 10.8 11.6 93
Cinnabar Park 9574 5.6 6.9 81 8.0 8.7 92
Columbine 9160 5.1 6.3 81 8.9 8.8 101
Divide Peak 8880 4.3 6.0 72 9.0 8.0 112
Joe Wright 10120 5.5 7.0 79 11.3 9.8 115
Laprele Creek 8375 .8 2.8 29 4.1 4.6 89
Med Bow 10500 -M -M * -M -M *
Never Summer 10280 6.8 6.9 99 5.7 6.8 84
North French Creek 10130 -M 9.2 * -M 9.4 *
Old Battle 10000 10.2 10.0 102 12.5 12.4 101
Rawah 9020 1.9 3.9 49 5.1 6.8 75
Sage Creek Basin 7850 -M 4.1 * -M 5.4 *
Sand Lake 10050 9.1 9.2 99 10.1 9.2 110
South Brush Creek 8440 2.1 3.6 58 5.4 5.4 100
Tower 10500 14.8 13.8 107 16.8 15.0 112
Webber Springs 9250 -M 7.4 * -M 9.8 *
Whiskey Park 8950 -M 7.8 * -M 10.2 *
Willow Creek Pass 9540 3.7 5.0 74 4.6 5.5 84
Zirkel 9340 5.8 7.7 75 11.8 11.0 107
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Basin Index (%) 85 98
SWEETWATER
Deer Park 9700 3.8 5.1 75 6.1 6.6 92
Larsen Creek 9000 -M 2.4 * 5.4 4.6 117
South Pass 9040 3.4 5.2 65 5.3 6.4 83
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Basin Index (%) 70 95
LOWER N. PLATTE
Casper Mtn. 7900 2.4 4.3 56 7.2 5.8 124
Laprele Creek 8375 .8 2.8 29 4.1 4.6 89
Reno Hill 8400 3.3 4.9 67 7.2 5.4 133
Windy Peak 7900 .9 2.5 36 4.3 4.1 105
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Basin Index (%) 51 115
LARAMIE RIVER
Brooklyn Lake 10240 -M 6.7 * -M 7.1 *
Cinnabar Park 9574 5.6 6.9 81 8.0 8.7 92
Crow Creek 8330 .0 3.2 0 3.0 4.3 70
Deadman Hill 10220 5.6 6.2 90 5.5 6.6 83
Rawah 9020 1.9 3.9 49 5.1 6.8 75
Roach 9700 -M 5.3 * -M 7.2 *
Windy Peak 7900 .9 2.5 36 4.3 4.1 105
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Basin Index (%) 62 85
S. PLATTE
Crow Creek 8330 .0 3.2 0 3.0 4.3 70
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Basin Index (%) 0 70
LITTLE SNAKE RIVER
Battle Mountain 7440 -M 3.2 * -M 5.7 *
Divide Peak 8880 4.3 6.0 72 9.0 8.0 112
Elk River 8700 4.4 4.9 90 9.3 6.8 137
Elkhead Divide 8780 4.3 -M * -M -M *
Little Snake River 8915 -M 7.4 * -M 12.2 *
Old Battle 10000 10.2 10.0 102 12.5 12.4 101
Sage Creek Basin 7850 -M 4.1 * -M 5.4 *
Sandstone RS 8150 3.0 3.8 79 7.1 6.7 106
Whiskey Park 8950 -M 7.8 * -M 10.2 *
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Basin Index (%) 89 112
UPPER GREEN RIVER
Big Sandy Opening 9080 2.8 4.5 62 5.2 4.6 113
Blind Bull Sum 8650 -M 7.7 * -M 7.2 *
East Rim Divide 7930 -M 3.3 * -M 4.3 *
Elkhart Park G.S. 9400 2.5 4.3 58 3.9 5.4 72
Gros Ventre Summit 8750 2.8 4.8 58 3.9 5.2 75
Gunsight Pass 9820 4.0 4.7 85 5.4 5.8 93
Indian Creek 9425 6.6 7.6 87 8.1 7.4 109
Kendall R.S. 7740 1.3 3.9 33 5.0 5.4 93
Larsen Creek 9000 -M 2.4 * 5.4 4.6 117
Loomis Park 8240 2.5 5.0 50 5.3 6.2 85
New Fork Lake 8340 2.1 3.6 58 3.1 4.3 72
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 1.4 4.0 35 6.2 5.1 122
Spring Creek Divide 9000 -M 7.6 * -M 8.2 *
Triple Peak 8500 5.8 7.0 83 9.5 8.6 110
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Basin Index (%) 64 97
LOWER GREEN RIVER
Blacks Fork Jct 8869 1.8 2.6 69 4.4 5.0 88
Buck Pasture 9632 3.4 -M * 7.4 -M *
EF Blacks Fork GS 9360 1.4 3.1 45 6.0 4.7 128
Hams Fork 7840 1.4 3.5 40 5.7 4.4 130
Henrys Fork 10182 -M -M * 6.1 -M *
Hewinta 9500 1.7 2.9 59 6.1 5.6 109
Hickerson Park 9122 1.9 2.2 86 4.3 4.5 96
Hole-in-Rock 9168 1.5 2.2 68 4.6 4.2 110
Indian Creek 9425 6.6 7.6 87 8.1 7.4 109
Kelley R.S. 8180 -M 4.6 * -M 6.0 *
Spirit Lk 10235 4.0 4.2 95 7.6 6.8 112
Steel Creek Park 10158 5.4 5.0 108 7.7 6.4 120
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Basin Index (%) 77 111
UPPER BEAR RIVER
Bear River RS 8777 1.7 2.6 65 5.4 4.8 112
Bug Lake 7987 2.8 5.2 54 7.7 6.7 115
Burts Miller Ranch 8000 2.4 2.2 109 3.2 3.3 97
Chalk Creek #1 9171 5.4 7.6 71 8.9 8.8 101
Giveout 6930 -M 2.6 * -M 4.8 *
Hayden Fork 9130 -M 4.1 * -M 7.5 *
Kelley R.S. 8180 -M 4.6 * -M 6.0 *
Lily Lake 9133 1.4 4.3 33 6.9 6.4 108
Monte Cristo 8932 6.2 7.4 84 10.4 8.8 118
Salt River Summit 7640 -M 3.7 * -M 5.6 *
Spring Creek Divide 9000 -M 7.6 * -M 8.2 *
Trial Lake 9992 5.1 6.0 85 8.7 7.7 113
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Basin Index (%) 71 110
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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.
