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 28 , 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 6.3 7.0 90 8.8 9.5 93
Blind Bull Sum 8650 8.8 8.8 100 7.9 8.2 96
Cottonwood Creek 7670 7.7 8.0 96 13.6 10.0 136
East Rim Divide 7930 -M 4.3 * -M 5.1 *
Grand Targhee 9260 16.9 19.2 88 15.4 15.6 99
Granite Creek 6770 5.0 6.0 83 7.4 8.8 84
Grassy Lake 7265 10.1 11.6 87 16.7 15.0 111
Gros Ventre Summit 8750 5.8 5.8 100 6.3 5.8 109
Gunsight Pass 9820 6.5 5.6 116 7.3 6.7 109
Lewis Lake Divide 7850 12.7 12.4 102 18.7 15.1 124
Loomis Park 8240 4.9 6.1 80 7.6 7.5 101
Phillips Bench 8200 8.1 9.6 84 11.8 11.3 104
Salt River Summit 7640 4.9 4.4 111 9.1 6.3 144
Snake River Station 6920 5.4 6.4 84 10.3 9.9 104
Somsen Ranch 6800 4.9 4.4 111 10.5 7.4 142
Spring Creek Divide 9000 9.7 9.0 108 11.7 9.8 119
Thumb Divide 7980 7.7 5.9 131 10.7 8.0 134
Togwotee Pass 9580 10.0 10.0 100 11.2 10.8 104
Triple Peak 8500 9.3 8.5 109 12.8 10.3 124
Two Ocean Plateau 9240 14.5 12.4 117 12.5 11.5 109
Willow Creek 8080 10.2 10.0 102 16.5 14.4 115
Younts Peak 8350 4.8 6.0 80 4.1 6.6 62
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Basin Index (%) 98 111
MADISON HEADWATERS IN WYOMING
Black Bear 8170 17.6 15.6 113 -M 16.6 *
Canyon 7870 3.8 -M * 6.4 -M *
Madison Plateau 7750 10.1 9.3 109 12.8 11.1 115
West Yellowstone 6700 4.8 4.2 114 8.2 6.8 121
Whiskey Creek 6800 6.2 5.8 107 9.9 8.8 112
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Basin Index (%) 111 116
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 7.0 9.3 75 6.4 8.9 72
Canyon 7870 3.8 -M * 6.4 -M *
Evening Star 9200 11.6 11.0 105 11.6 13.6 85
Fisher Creek 9100 14.0 14.0 100 15.3 13.9 110
Monument Peak 8850 8.0 9.0 89 10.6 10.1 105
Northeast Entrance 7350 1.9 3.8 50 5.8 6.2 94
Parker Peak 9400 8.6 9.6 90 8.6 9.4 91
Sylvan Lake 8420 6.9 8.1 85 11.3 10.9 104
Thumb Divide 7980 7.7 5.9 131 10.7 8.0 134
Two Ocean Plateau 9240 14.5 12.4 117 12.5 11.5 109
White Mill 8700 9.3 9.8 95 9.7 9.8 99
Wolverine 7650 4.0 4.8 83 5.5 5.8 95
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Basin Index (%) 96 100
WIND RIVER
Burroughs Creek 8750 3.7 -M * 5.9 -M *
Castle Creek 8400 1.2 3.2 38 2.6 4.4 59
Cold Springs 9630 5.2 3.4 153 7.1 4.6 154
Deer Park 9700 5.6 6.0 93 8.2 7.7 106
Hobbs Park 10100 7.5 6.0 125 9.0 6.0 150
Kirwin 9550 5.9 5.2 113 6.5 5.9 110
Little Warm 9370 5.7 4.1 139 7.7 6.0 128
South Pass 9040 5.0 5.8 86 6.8 6.9 99
St. Lawrence Alt 8620 1.2 -M * 5.6 -M *
Togwotee Pass 9580 10.0 10.0 100 11.2 10.8 104
Townsend Creek 8700 3.8 3.9 97 6.8 5.6 121
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Basin Index (%) 105 114
BIGHORN BASIN
Bald Mtn. 9380 7.1 8.2 87 7.1 7.4 96
Bear Trap Meadow 8200 2.7 2.6 104 4.8 4.2 114
Bone Springs Div 9350 6.8 7.1 96 6.4 6.8 94
Grave Springs 8550 2.2 3.0 73 3.9 4.3 91
Kirwin 9550 5.9 5.2 113 6.5 5.9 110
Marquette 8760 1.0 3.4 29 3.7 4.6 80
Middle Powder 7760 2.8 4.1 68 5.1 4.9 104
Owl Creek 8975 3.0 2.5 120 4.1 3.2 128
Powder River Pass 9480 4.7 4.7 100 4.0 6.0 67
Shell Creek 9580 6.4 7.0 91 6.9 6.3 110
Timber Creek 7950 .9 2.2 41 2.5 4.0 62
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Basin Index (%) 87 95
SHOSHONE RIVER
Blackwater 9780 10.1 10.6 95 10.7 10.2 105
Evening Star 9200 11.6 11.0 105 11.6 13.6 85
Marquette 8760 1.0 3.4 29 3.7 4.6 80
Sylvan Lake 8420 6.9 8.1 85 11.3 10.9 104
Sylvan Road 7120 3.2 5.2 62 7.8 8.4 93
Younts Peak 8350 4.8 6.0 80 4.1 6.6 62
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Basin Index (%) 85 91
POWDER RIVER
Bear Trap Meadow 8200 2.7 2.6 104 4.8 4.2 114
Cloud Peak Reservoir 9860 6.3 6.0 105 7.8 6.2 126
Grave Springs 8550 2.2 3.0 73 3.9 4.3 91
Hansen Sawmill 8360 3.2 3.0 107 5.4 4.0 135
Middle Powder 7760 2.8 4.1 68 5.1 4.9 104
Powder River Pass 9480 4.7 4.7 100 4.0 6.0 67
Soldier Park 8720 .0 2.0 0 5.2 4.3 121
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Basin Index (%) 86 107
TONGUE RIVER
Big Goose 7990 2.5 3.2 78 6.2 4.8 129
Bone Springs Div 9350 6.8 7.1 96 6.4 6.8 94
Burgess Junction 7880 3.7 4.4 84 6.0 5.4 111
Dome Lake 8880 3.8 4.6 83 6.8 5.6 121
Little Goose 8870 3.4 4.0 85 7.2 5.5 131
Sucker Creek 8880 5.0 5.0 100 7.2 6.1 118
Tie Creek 6870 .8 2.0 40 5.8 5.0 116
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Basin Index (%) 86 116
BELLE FOURCHE
Blind Park 6890 1.8 2.8 64 4.2 4.6 91
Cole Canyon 5910 .9 2.2 41 4.8 4.0 120
North Rapid Creek 6130 1.8 3.2 56 3.3 3.6 92
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Basin Index (%) 55 101
CHEYENNE RIVER BASIN
Blind Park 6890 1.8 2.8 64 4.2 4.6 91
North Rapid Creek 6130 1.8 3.2 56 3.3 3.6 92
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Basin Index (%) 60 91
UPPER N. PLATTE
Arapaho Ridge 10960 8.9 9.2 97 8.8 9.9 89
Blackhall Mtn 9820 13.3 11.8 113 15.3 13.4 114
Cinnabar Park 9574 8.8 8.4 105 11.3 10.2 111
Columbine 9160 7.7 8.4 92 11.5 10.2 113
Divide Peak 8880 6.9 7.2 96 11.5 9.8 117
Joe Wright 10120 8.5 8.0 106 14.5 11.0 132
Laprele Creek 8375 1.4 3.6 39 4.6 5.2 88
Med Bow 10500 16.6 -M * 16.4 -M *
Never Summer 10280 10.0 8.2 122 7.7 8.0 96
North French Creek 10130 13.2 10.8 122 14.4 11.4 126
Old Battle 10000 14.1 11.8 119 16.1 14.0 115
Rawah 9020 3.8 4.8 79 6.8 7.5 91
Sage Creek Basin 7850 3.5 5.0 70 5.8 6.3 92
Sand Lake 10050 12.8 11.0 116 13.6 10.2 133
South Brush Creek 8440 4.0 4.3 93 6.8 5.8 117
Tower 10500 17.1 16.0 107 20.4 16.5 124
Webber Springs 9250 9.7 8.8 110 12.8 11.0 116
Whiskey Park 8950 12.9 9.2 140 16.0 11.6 138
Willow Creek Pass 9540 6.2 5.4 115 7.0 6.4 109
Zirkel 9340 9.7 10.3 94 15.8 13.0 122
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Basin Index (%) 106 115
SWEETWATER
Deer Park 9700 5.6 6.0 93 8.2 7.7 106
Larsen Creek 9000 -M 2.9 * 6.4 5.8 110
South Pass 9040 5.0 5.8 86 6.8 6.9 99
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Basin Index (%) 90 105
LOWER N. PLATTE
Casper Mtn. 7900 2.5 5.2 48 7.6 6.5 117
Laprele Creek 8375 1.4 3.6 39 4.6 5.2 88
Reno Hill 8400 3.9 5.6 70 7.7 6.5 118
Windy Peak 7900 1.9 3.0 63 5.2 4.6 113
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Basin Index (%) 56 110
LARAMIE RIVER
Brooklyn Lake 10240 9.7 7.8 124 12.1 8.5 142
Cinnabar Park 9574 8.8 8.4 105 11.3 10.2 111
Crow Creek 8330 1.1 3.6 31 4.3 4.8 90
Deadman Hill 10220 8.7 7.4 118 8.1 7.7 105
Rawah 9020 3.8 4.8 79 6.8 7.5 91
Roach 9700 6.7 6.4 105 9.1 8.3 110
Windy Peak 7900 1.9 3.0 63 5.2 4.6 113
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Basin Index (%) 98 110
S. PLATTE
Crow Creek 8330 1.1 3.6 31 4.3 4.8 90
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Basin Index (%) 31 90
LITTLE SNAKE RIVER
Battle Mountain 7440 3.7 4.0 92 8.7 6.4 136
Divide Peak 8880 6.9 7.2 96 11.5 9.8 117
Elk River 8700 7.7 6.0 128 12.2 8.2 149
Elkhead Divide 8780 7.5 -M * 11.5 -M *
Little Snake River 8915 9.7 9.6 101 17.2 14.7 117
Old Battle 10000 14.1 11.8 119 16.1 14.0 115
Sage Creek Basin 7850 3.5 5.0 70 5.8 6.3 92
Sandstone RS 8150 5.1 4.6 111 8.8 7.6 116
Whiskey Park 8950 12.9 9.2 140 16.0 11.6 138
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Basin Index (%) 111 123
UPPER GREEN RIVER
Big Sandy Opening 9080 4.3 5.6 77 6.5 5.4 120
Blind Bull Sum 8650 8.8 8.8 100 7.9 8.2 96
East Rim Divide 7930 -M 4.3 * -M 5.1 *
Elkhart Park G.S. 9400 3.2 5.5 58 4.4 6.2 71
Gros Ventre Summit 8750 5.8 5.8 100 6.3 5.8 109
Gunsight Pass 9820 6.5 5.6 116 7.3 6.7 109
Indian Creek 9425 10.5 9.5 111 11.0 8.8 125
Kendall R.S. 7740 3.5 4.8 73 6.9 6.4 108
Larsen Creek 9000 -M 2.9 * 6.4 5.8 110
Loomis Park 8240 4.9 6.1 80 7.6 7.5 101
New Fork Lake 8340 3.2 4.4 73 4.2 4.8 88
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 3.9 4.8 81 8.8 6.0 147
Spring Creek Divide 9000 9.7 9.0 108 11.7 9.8 119
Triple Peak 8500 9.3 8.5 109 12.8 10.3 124
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Basin Index (%) 94 111
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.0 3.2 125 6.6 5.7 116
Buck Pasture 9632 6.4 -M * 9.6 -M *
EF Blacks Fork GS 9360 4.4 3.8 116 7.0 5.1 137
Hams Fork 7840 3.4 4.5 76 7.0 5.0 140
Henrys Fork 10182 -M -M * 7.5 -M *
Hewinta 9500 3.8 3.3 115 8.4 6.3 133
Hickerson Park 9122 2.9 2.8 104 5.2 4.8 108
Hole-in-Rock 9168 2.7 2.9 93 5.7 4.6 124
Indian Creek 9425 10.5 9.5 111 11.0 8.8 125
Kelley R.S. 8180 4.4 5.8 76 9.7 7.4 131
Spirit Lk 10235 6.9 5.2 133 9.7 7.8 124
Steel Creek Park 10158 7.6 5.8 131 9.8 7.1 138
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Basin Index (%) 108 128
UPPER BEAR RIVER
Bear River RS 8777 4.0 3.6 111 7.6 5.2 146
Bug Lake 7987 6.3 6.4 98 10.7 7.8 137
Burts Miller Ranch 8000 3.6 2.3 157 4.1 3.5 117
Chalk Creek #1 9171 9.2 8.8 105 12.2 9.8 124
Giveout 6930 3.3 2.9 114 7.4 5.6 132
Hayden Fork 9130 7.2 5.3 136 12.3 8.6 143
Kelley R.S. 8180 4.4 5.8 76 9.7 7.4 131
Lily Lake 9133 4.2 4.8 88 9.2 7.1 130
Monte Cristo 8932 10.0 9.7 103 13.8 10.6 130
Salt River Summit 7640 4.9 4.4 111 9.1 6.3 144
Spring Creek Divide 9000 9.7 9.0 108 11.7 9.8 119
Trial Lake 9992 10.3 8.4 123 12.2 9.4 130
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Basin Index (%) 108 132
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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.
