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 30 , 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 6.8 7.3 93 9.1 9.8 93
Blind Bull Sum 8650 9.3 9.5 98 8.3 8.4 99
Cottonwood Creek 7670 7.9 8.4 94 13.8 10.5 131
East Rim Divide 7930 -M 4.4 * -M 5.2 *
Grand Targhee 9260 17.0 19.6 87 15.6 15.7 99
Granite Creek 6770 5.3 6.3 84 8.5 8.8 97
Grassy Lake 7265 11.0 12.0 92 17.8 16.4 109
Gros Ventre Summit 8750 5.9 6.2 95 6.5 5.9 110
Gunsight Pass 9820 6.6 5.8 114 7.5 6.8 110
Lewis Lake Divide 7850 13.6 12.6 108 19.7 15.7 125
Loomis Park 8240 5.3 6.4 83 8.0 7.6 105
Phillips Bench 8200 8.8 10.0 88 12.5 12.3 102
Salt River Summit 7640 5.3 4.6 115 9.5 6.8 140
Snake River Station 6920 5.9 6.6 89 10.9 10.4 105
Somsen Ranch 6800 5.3 4.7 113 10.8 8.0 135
Spring Creek Divide 9000 10.1 9.7 104 12.5 10.2 123
Thumb Divide 7980 8.1 6.1 133 11.0 8.1 136
Togwotee Pass 9580 10.2 10.4 98 11.5 11.0 105
Triple Peak 8500 9.7 8.7 111 13.4 10.6 126
Two Ocean Plateau 9240 15.0 13.1 115 13.0 12.2 107
Willow Creek 8080 10.8 10.6 102 17.0 15.0 113
Younts Peak 8350 5.5 6.2 89 4.7 7.1 66
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Basin Index (%) 99 111
MADISON HEADWATERS IN WYOMING
Black Bear 8170 18.5 15.8 117 -M 17.8 *
Canyon 7870 4.2 -M * 6.8 -M *
Madison Plateau 7750 10.7 9.7 110 13.4 11.6 116
West Yellowstone 6700 5.1 4.4 116 8.5 7.2 118
Whiskey Creek 6800 6.5 5.9 110 9.8 9.1 108
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Basin Index (%) 114 114
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 7.3 9.6 76 6.8 9.2 74
Canyon 7870 4.2 -M * 6.8 -M *
Evening Star 9200 12.3 11.6 106 12.0 14.0 86
Fisher Creek 9100 14.5 14.6 99 15.9 14.7 108
Monument Peak 8850 8.1 9.0 90 10.8 10.5 103
Northeast Entrance 7350 2.0 4.0 50 5.9 6.3 94
Parker Peak 9400 9.0 10.0 90 9.2 9.8 94
Sylvan Lake 8420 7.4 8.5 87 11.9 11.5 103
Thumb Divide 7980 8.1 6.1 133 11.0 8.1 136
Two Ocean Plateau 9240 15.0 13.1 115 13.0 12.2 107
White Mill 8700 9.6 10.2 94 10.0 10.7 93
Wolverine 7650 4.3 5.0 86 5.8 6.0 97
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Basin Index (%) 96 99
WIND RIVER
Burroughs Creek 8750 3.9 -M * 6.2 -M *
Castle Creek 8400 1.4 3.2 44 2.7 4.4 61
Cold Springs 9630 5.4 3.6 150 7.3 4.7 155
Deer Park 9700 6.0 6.1 98 8.6 8.4 102
Hobbs Park 10100 7.8 6.2 126 9.2 6.1 151
Kirwin 9550 6.0 5.6 107 6.8 6.2 110
Little Warm 9370 5.9 4.2 140 7.9 6.0 132
South Pass 9040 5.4 6.0 90 7.1 7.0 101
St. Lawrence Alt 8620 1.2 -M * 5.7 -M *
Togwotee Pass 9580 10.2 10.4 98 11.5 11.0 105
Townsend Creek 8700 4.0 4.0 100 6.9 5.6 123
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Basin Index (%) 106 114
BIGHORN BASIN
Bald Mtn. 9380 7.2 8.6 84 7.3 7.6 96
Bear Trap Meadow 8200 2.8 2.9 97 4.8 4.2 114
Bone Springs Div 9350 7.0 7.3 96 6.6 7.0 94
Grave Springs 8550 2.2 3.1 71 -M 4.6 *
Kirwin 9550 6.0 5.6 107 6.8 6.2 110
Marquette 8760 1.2 3.4 35 3.7 4.6 80
Middle Powder 7760 2.9 4.2 69 5.1 4.9 104
Owl Creek 8975 3.1 2.6 119 4.3 3.2 134
Powder River Pass 9480 4.8 4.9 98 4.1 6.2 66
Shell Creek 9580 6.4 7.2 89 7.0 6.5 108
Timber Creek 7950 1.0 2.2 45 3.1 4.0 78
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Basin Index (%) 86 97
SHOSHONE RIVER
Blackwater 9780 10.4 10.8 96 11.2 10.4 108
Evening Star 9200 12.3 11.6 106 12.0 14.0 86
Marquette 8760 1.2 3.4 35 3.7 4.6 80
Sylvan Lake 8420 7.4 8.5 87 11.9 11.5 103
Sylvan Road 7120 3.4 5.4 63 8.9 8.6 103
Younts Peak 8350 5.5 6.2 89 4.7 7.1 66
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Basin Index (%) 88 93
POWDER RIVER
Bear Trap Meadow 8200 2.8 2.9 97 4.8 4.2 114
Cloud Peak Reservoir 9860 6.4 6.2 103 7.8 6.4 122
Grave Springs 8550 2.2 3.1 71 -M 4.6 *
Hansen Sawmill 8360 3.4 3.0 113 5.6 4.1 137
Middle Powder 7760 2.9 4.2 69 5.1 4.9 104
Powder River Pass 9480 4.8 4.9 98 4.1 6.2 66
Soldier Park 8720 .3 2.3 13 5.3 4.4 120
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Basin Index (%) 86 108
TONGUE RIVER
Big Goose 7990 2.6 3.2 81 6.6 4.8 138
Bone Springs Div 9350 7.0 7.3 96 6.6 7.0 94
Burgess Junction 7880 3.6 4.5 80 6.2 5.6 111
Dome Lake 8880 3.9 4.7 83 6.9 5.6 123
Little Goose 8870 3.5 4.2 83 7.3 5.6 130
Sucker Creek 8880 5.1 5.1 100 7.2 6.2 116
Tie Creek 6870 .8 2.0 40 5.9 5.0 118
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Basin Index (%) 85 117
BELLE FOURCHE
Blind Park 6890 1.8 3.0 60 4.1 4.8 85
Cole Canyon 5910 .9 2.3 39 4.8 4.0 120
North Rapid Creek 6130 1.7 3.2 53 3.4 3.8 89
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Basin Index (%) 52 98
CHEYENNE RIVER BASIN
Blind Park 6890 1.8 3.0 60 4.1 4.8 85
North Rapid Creek 6130 1.7 3.2 53 3.4 3.8 89
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Basin Index (%) 56 87
UPPER N. PLATTE
Arapaho Ridge 10960 9.3 9.4 99 9.1 10.2 89
Blackhall Mtn 9820 14.2 12.1 117 16.2 13.5 120
Cinnabar Park 9574 9.1 8.5 107 11.7 10.6 110
Columbine 9160 8.4 8.5 99 12.1 10.3 117
Divide Peak 8880 7.4 7.3 101 12.0 9.8 122
Joe Wright 10120 9.0 8.2 110 15.1 11.2 135
Laprele Creek 8375 1.4 3.6 39 4.6 5.4 85
Med Bow 10500 17.2 -M * 16.8 -M *
Never Summer 10280 10.3 8.4 123 7.9 8.2 96
North French Creek 10130 13.6 11.3 120 14.8 11.9 124
Old Battle 10000 14.8 11.8 125 16.6 14.0 119
Rawah 9020 3.9 4.8 81 7.0 7.6 92
Sage Creek Basin 7850 3.7 5.1 73 6.1 6.3 97
Sand Lake 10050 13.2 11.3 117 13.9 10.5 132
South Brush Creek 8440 4.2 4.4 95 7.0 5.8 121
Tower 10500 18.6 16.6 112 20.5 16.5 124
Webber Springs 9250 10.3 8.9 116 13.5 11.0 123
Whiskey Park 8950 13.5 9.4 144 16.5 12.0 138
Willow Creek Pass 9540 6.5 5.6 116 7.2 6.6 109
Zirkel 9340 10.6 10.4 102 16.5 13.0 127
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Basin Index (%) 110 117
SWEETWATER
Deer Park 9700 6.0 6.1 98 8.6 8.4 102
Larsen Creek 9000 -M 2.9 * 6.8 5.8 117
South Pass 9040 5.4 6.0 90 7.1 7.0 101
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Basin Index (%) 94 106
LOWER N. PLATTE
Casper Mtn. 7900 2.5 5.4 46 7.6 6.6 115
Laprele Creek 8375 1.4 3.6 39 4.6 5.4 85
Reno Hill 8400 3.9 5.8 67 7.7 6.5 118
Windy Peak 7900 1.8 3.0 60 5.2 4.7 111
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Basin Index (%) 54 108
LARAMIE RIVER
Brooklyn Lake 10240 10.1 8.2 123 12.6 8.8 143
Cinnabar Park 9574 9.1 8.5 107 11.7 10.6 110
Crow Creek 8330 1.1 3.7 30 4.2 5.2 81
Deadman Hill 10220 9.0 7.6 118 8.4 7.8 108
Rawah 9020 3.9 4.8 81 7.0 7.6 92
Roach 9700 7.0 6.6 106 9.3 8.7 107
Windy Peak 7900 1.8 3.0 60 5.2 4.7 111
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Basin Index (%) 99 109
S. PLATTE
Crow Creek 8330 1.1 3.7 30 4.2 5.2 81
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Basin Index (%) 30 81
LITTLE SNAKE RIVER
Battle Mountain 7440 4.0 4.2 95 8.9 6.5 137
Divide Peak 8880 7.4 7.3 101 12.0 9.8 122
Elk River 8700 8.3 6.4 130 12.8 8.4 152
Elkhead Divide 8780 8.3 -M * 12.5 -M *
Little Snake River 8915 10.4 9.8 106 18.0 14.9 121
Old Battle 10000 14.8 11.8 125 16.6 14.0 119
Sage Creek Basin 7850 3.7 5.1 73 6.1 6.3 97
Sandstone RS 8150 5.4 4.7 115 9.1 7.7 118
Whiskey Park 8950 13.5 9.4 144 16.5 12.0 138
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Basin Index (%) 115 126
UPPER GREEN RIVER
Big Sandy Opening 9080 4.6 5.8 79 6.8 5.9 115
Blind Bull Sum 8650 9.3 9.5 98 8.3 8.4 99
East Rim Divide 7930 -M 4.4 * -M 5.2 *
Elkhart Park G.S. 9400 3.5 5.7 61 4.8 6.2 77
Gros Ventre Summit 8750 5.9 6.2 95 6.5 5.9 110
Gunsight Pass 9820 6.6 5.8 114 7.5 6.8 110
Indian Creek 9425 11.0 9.8 112 11.4 9.2 124
Kendall R.S. 7740 3.8 5.0 76 7.2 6.6 109
Larsen Creek 9000 -M 2.9 * 6.8 5.8 117
Loomis Park 8240 5.3 6.4 83 8.0 7.6 105
New Fork Lake 8340 3.5 4.6 76 5.4 5.1 106
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 4.2 5.0 84 9.2 6.4 144
Spring Creek Divide 9000 10.1 9.7 104 12.5 10.2 123
Triple Peak 8500 9.7 8.7 111 13.4 10.6 126
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Basin Index (%) 94 114
LOWER GREEN RIVER
Blacks Fork Jct 8869 4.1 3.3 124 6.7 5.8 116
Buck Pasture 9632 6.5 -M * 9.7 -M *
EF Blacks Fork GS 9360 4.6 4.0 115 8.2 5.2 158
Hams Fork 7840 3.8 4.5 84 7.1 5.1 139
Henrys Fork 10182 -M -M * 7.5 -M *
Hewinta 9500 4.0 3.6 111 8.5 6.4 133
Hickerson Park 9122 3.0 2.9 103 5.2 4.9 106
Hole-in-Rock 9168 2.8 2.9 97 5.8 4.9 118
Indian Creek 9425 11.0 9.8 112 11.4 9.2 124
Kelley R.S. 8180 4.9 6.0 82 10.1 7.8 129
Spirit Lk 10235 7.0 5.2 135 9.8 7.8 126
Steel Creek Park 10158 7.6 6.0 127 10.0 7.2 139
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Basin Index (%) 110 129
UPPER BEAR RIVER
Bear River RS 8777 4.2 3.6 117 7.8 5.3 147
Bug Lake 7987 6.8 6.4 106 11.0 8.0 138
Burts Miller Ranch 8000 2.8 2.3 122 4.3 3.7 116
Chalk Creek #1 9171 9.8 8.8 111 12.5 10.1 124
Giveout 6930 3.7 3.1 119 7.7 5.7 135
Hayden Fork 9130 7.5 5.6 134 12.5 8.8 142
Kelley R.S. 8180 4.9 6.0 82 10.1 7.8 129
Lily Lake 9133 4.5 4.8 94 9.3 7.1 131
Monte Cristo 8932 10.6 9.8 108 13.9 10.8 129
Salt River Summit 7640 5.3 4.6 115 9.5 6.8 140
Spring Creek Divide 9000 10.1 9.7 104 12.5 10.2 123
Trial Lake 9992 10.9 8.4 130 13.0 9.5 137
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Basin Index (%) 111 132
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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.
