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 SUNDAY: DECEMBER 29 , 2019
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
Base Camp 7060 5.1 6.9 74 5.5 9.6 57
Black Bear 8170 11.0 16.8 65 11.1 17.0 65
Blind Bull Sum 8650 7.9 8.8 90 5.3 8.9 60
Cottonwood Creek 7670 8.7 8.0 109 8.8 10.7 82
East Rim Divide 7930 3.7 4.2 88 3.2 5.3 60
Grand Targhee 9260 16.1 17.2 94 10.0 14.6 68
Granite Creek 6770 4.7 6.0 78 5.1 9.0 57
Grassy Lake 7265 8.6 11.9 72 15.2 16.2 94
Gros Ventre Summit 8750 4.2 5.9 71 4.2 5.9 71
Gunsight Pass 9820 4.9 5.8 84 5.1 6.1 84
Lewis Lake Divide 7850 7.4 12.6 59 10.2 16.1 63
Phillips Bench 8200 9.2 10.4 88 9.3 12.2 76
Salt River Summit 7640 4.4 4.6 96 5.1 7.2 71
Snake River Station 6920 5.6 5.8 97 7.2 10.5 69
Spring Creek Divide 9000 7.6 9.4 81 7.6 10.4 73
Thumb Divide 7980 4.7 5.9 80 5.7 8.3 69
Togwotee Pass 9580 10.1 10.6 95 9.4 11.0 85
Two Ocean Plateau 9240 10.8 12.0 90 8.5 12.1 70
Willow Creek 8080 9.4 10.2 92 11.3 15.0 75
Younts Peak 8350 6.2 6.8 91 3.3 7.4 45
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Basin Index (%) 84 71
MADISON-GALLATIN
Black Bear 8170 11.0 16.8 65 11.1 17.0 65
Canyon 7870 4.7 5.1 92 4.8 7.5 64
Madison Plateau 7750 7.2 9.9 73 6.9 11.8 58
West Yellowstone 6700 3.8 4.4 86 3.2 6.7 48
Whiskey Creek 6800 5.2 6.2 84 5.2 9.3 56
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Basin Index (%) 75 60
YELLOWSTONE
Beartooth Lake 9360 9.0 9.6 94 8.1 8.8 92
Burnt Mtn 5880 1.7 1.9 89 5.5 6.6 83
Canyon 7870 4.7 5.1 92 4.8 7.5 64
Cole Creek 7850 6.9 6.2 111 5.7 6.3 90
Evening Star 9200 10.7 10.7 100 11.9 12.6 94
Fisher Creek 9100 11.7 14.1 83 12.3 14.4 85
Northeast Entrance 7350 4.1 3.7 111 5.2 5.9 88
Parker Peak 9400 10.2 9.4 109 9.4 8.2 115
Sylvan Lake 8420 8.2 8.9 92 9.2 10.8 85
Thumb Divide 7980 4.7 5.9 80 5.7 8.3 69
Two Ocean Plateau 9240 10.8 12.0 90 8.5 12.1 70
White Mill 8700 10.2 9.4 109 7.7 10.8 71
Wolverine 7650 5.4 4.5 120 6.0 6.0 100
Younts Peak 8350 6.2 6.8 91 3.3 7.4 45
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Basin Index (%) 97 82
WIND RIVER
Burroughs Creek 8750 4.5 -M * 5.8 -M *
Castle Creek 8400 2.6 -M * 3.5 -M *
Cold Springs 9630 3.3 3.0 110 3.1 4.8 65
Deer Park 9700 5.5 6.6 83 4.6 8.4 55
Hobbs Park 10100 5.5 6.3 87 4.8 6.0 80
Kirwin 9550 6.2 4.2 148 4.6 5.4 85
Little Warm 9370 -M 4.3 * 2.7 6.0 45
Owl Creek 8975 2.7 2.4 112 3.2 2.8 114
South Pass 9040 4.4 6.3 70 3.7 8.1 46
St. Lawrence Alt 8620 2.5 2.9 86 3.5 4.2 83
Togwotee Pass 9580 10.1 10.6 95 9.4 11.0 85
Townsend Creek 8700 4.4 3.9 113 4.4 5.7 77
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Basin Index (%) 97 71
BIGHORN BASIN
Bald Mtn. 9380 10.2 8.0 128 7.0 7.6 92
Bear Trap Meadow 8200 4.6 2.5 184 5.5 4.2 131
Bone Springs Div 9350 7.9 7.1 111 5.9 6.9 86
Grave Springs 8550 5.2 3.2 162 5.9 4.9 120
Kirwin 9550 6.2 4.2 148 4.6 5.4 85
Marquette 8760 3.7 -M * 4.6 -M *
Middle Powder 7760 5.8 4.8 121 6.7 6.0 112
Owl Creek 8975 2.7 2.4 112 3.2 2.8 114
Powder River Pass 9480 6.5 4.5 144 6.3 5.7 111
Shell Creek 9580 7.3 7.0 104 5.2 6.4 81
Timber Creek 7950 3.6 2.1 171 4.0 3.9 103
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Basin Index (%) 131 101
SHOSHONE RIVER
Blackwater 9780 9.4 10.2 92 8.8 9.6 92
Evening Star 9200 10.7 10.7 100 11.9 12.6 94
Marquette 8760 3.7 -M * 4.6 -M *
Sylvan Lake 8420 8.2 8.9 92 9.2 10.8 85
Sylvan Road 7120 4.7 5.1 92 7.4 8.7 85
Younts Peak 8350 6.2 6.8 91 3.3 7.4 45
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Basin Index (%) 94 83
POWDER RIVER
Bear Trap Meadow 8200 4.6 2.5 184 5.5 4.2 131
Cloud Peak Reservoir 9860 5.9 6.0 98 6.2 6.1 102
Grave Springs 8550 5.2 3.2 162 5.9 4.9 120
Hansen Sawmill 8360 3.2 2.9 110 4.1 4.0 102
Middle Powder 7760 5.8 4.8 121 6.7 6.0 112
Powder River Pass 9480 6.5 4.5 144 6.3 5.7 111
Soldier Park 8720 1.9 -M * 4.3 -M *
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Basin Index (%) 131 112
TONGUE RIVER
Big Goose 7990 3.8 3.6 106 5.1 5.2 98
Bone Springs Div 9350 7.9 7.1 111 5.9 6.9 86
Burgess Junction 7880 4.9 4.6 107 -M 5.8 *
Dome Lake 8880 4.1 5.2 79 3.4 6.6 52
Little Goose 8870 4.7 -M * 4.1 -M *
Sucker Creek 8880 6.3 5.0 126 5.2 6.6 79
Tie Creek 6870 3.1 1.9 163 6.1 5.5 111
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Basin Index (%) 110 83
BELLE FOURCHE
Blind Park 6890 3.5 3.1 113 4.6 5.8 79
Cole Canyon 5910 2.4 2.0 120 -M 4.6 *
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Basin Index (%) 116 79
CHEYENNE RIVER BASIN
Blind Park 6890 3.5 3.1 113 4.6 5.8 79
North Rapid Creek 6130 3.1 3.1 100 4.5 4.9 92
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Basin Index (%) 106 85
UPPER N. PLATTE
Arapaho Ridge 10960 10.3 9.1 113 10.2 10.4 98
Blackhall Mtn 9820 12.1 -M * 12.6 -M *
Columbine 9160 10.9 8.4 130 -M 11.2 *
Divide Peak 8880 9.2 8.1 114 10.3 10.0 103
Joe Wright 10120 7.7 9.2 84 11.3 11.8 96
Laprele Creek 8375 6.4 3.8 168 6.8 5.8 117
Med Bow 10500 17.3 -M * 15.0 -M *
Never Summer 10280 8.1 8.4 96 6.0 -M *
North French Creek 10130 12.6 11.1 114 12.8 11.6 110
Old Battle 10000 13.7 12.2 112 13.1 15.7 83
Rawah 9020 5.9 4.1 144 7.2 7.1 101
Sage Creek Basin 7850 7.0 5.5 127 5.9 7.0 84
Sand Lake 10050 11.8 11.2 105 11.1 10.9 102
South Brush Creek 8440 5.1 4.5 113 5.5 7.0 79
Tower 10500 17.5 18.4 95 16.6 17.8 93
Webber Springs 9250 9.6 9.2 104 10.7 12.0 89
Whiskey Park 8950 12.7 9.1 140 13.7 11.5 119
Willow Creek Pass 9540 5.7 5.3 108 5.2 6.3 83
Zirkel 9340 11.1 9.4 118 13.1 12.8 102
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Basin Index (%) 112 97
SWEETWATER
Deer Park 9700 5.5 6.6 83 4.6 8.4 55
Larsen Creek 9000 -M 4.7 * 3.0 -M *
South Pass 9040 4.4 6.3 70 3.7 8.1 46
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Basin Index (%) 77 50
LOWER N. PLATTE
Casper Mtn. 7900 8.4 5.6 150 6.0 7.3 82
Laprele Creek 8375 6.4 3.8 168 6.8 5.8 117
Reno Hill 8400 8.3 5.6 148 8.7 6.9 126
Windy Peak 7900 5.4 3.0 180 4.4 5.1 86
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Basin Index (%) 158 103
LARAMIE RIVER
Brooklyn Lake 10240 10.7 7.6 141 10.9 8.9 122
Cinnabar Park 9574 10.6 8.5 125 11.9 10.9 109
Crow Creek 8330 4.3 4.2 102 6.1 5.4 113
Deadman Hill 10220 8.7 7.0 124 7.5 7.6 99
Rawah 9020 5.9 4.1 144 7.2 7.1 101
Roach 9700 7.1 6.8 104 7.0 8.7 80
Windy Peak 7900 5.4 3.0 180 4.4 5.1 86
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Basin Index (%) 128 102
S. PLATTE
Black Mountain 8920 5.6 -M * 6.6 -M *
Crow Creek 8330 4.3 4.2 102 6.1 5.4 113
Deadman Hill 10220 8.7 7.0 124 7.5 7.6 99
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Basin Index (%) 116 105
LITTLE SNAKE RIVER
Battle Mountain 7440 6.3 3.7 170 6.2 6.7 93
Divide Peak 8880 9.2 8.1 114 10.3 10.0 103
Elk River 8700 8.7 6.4 136 6.7 8.8 76
Little Snake River 8915 11.1 8.6 129 14.8 14.1 105
Old Battle 10000 13.7 12.2 112 13.1 15.7 83
Sage Creek Basin 7850 7.0 5.5 127 5.9 7.0 84
Sandstone RS 8150 7.5 4.2 179 7.0 8.2 85
Whiskey Park 8950 12.7 9.1 140 13.7 11.5 119
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Basin Index (%) 132 95
UPPER GREEN RIVER
Big Sandy Opening 9080 3.5 5.6 62 3.0 6.0 50
Blind Bull Sum 8650 7.9 8.8 90 5.3 8.9 60
East Rim Divide 7930 3.7 4.2 88 3.2 5.3 60
Elkhart Park G.S. 9400 3.7 5.5 67 3.9 6.2 63
Gros Ventre Summit 8750 4.2 5.9 71 4.2 5.9 71
Gunsight Pass 9820 4.9 5.8 84 5.1 6.1 84
Indian Creek 9425 7.6 9.9 77 6.3 9.4 67
Kendall R.S. 7740 3.6 4.6 78 3.5 6.2 56
Loomis Park 8240 4.7 6.2 76 7.1 7.8 91
New Fork Lake 8340 4.1 4.4 93 -M 5.0 *
Pocket Creek 9360 -M -M * 2.6 -M *
Snider Basin 8060 4.0 4.9 82 4.7 6.3 75
Spring Creek Divide 9000 7.6 9.4 81 7.6 10.4 73
Triple Peak 8500 8.6 7.9 109 8.4 10.5 80
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Basin Index (%) 82 70
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.8 -M * 5.6 -M *
Buck Pasture 9632 7.5 -M * 7.9 -M *
EF Blacks Fork GS 9360 6.6 -M * 4.8 -M *
Hams Fork 7840 3.7 4.4 84 4.5 5.0 90
Hewinta 9500 4.6 3.6 128 6.7 6.2 108
Hickerson Park 9122 5.6 2.7 207 6.5 4.8 135
Hole-in-Rock 9168 5.8 2.9 200 6.2 4.6 135
Indian Creek 9425 7.6 9.9 77 6.3 9.4 67
Kelley R.S. 8180 5.4 6.0 90 6.1 8.1 75
Spirit Lk 10235 8.9 -M * 9.7 -M *
Steel Creek Park 10158 7.6 6.1 125 8.5 7.3 116
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Basin Index (%) 113 99
UPPER BEAR RIVER
Bear River RS 8777 3.8 -M * 5.2 -M *
Bug Lake 7987 8.0 6.1 131 8.0 8.6 93
Burts Miller Ranch 8000 3.5 -M * 3.6 -M *
Chalk Creek #1 9171 8.4 9.5 88 7.8 11.1 70
Hayden Fork 9130 6.3 5.5 115 9.1 9.2 99
Kelley R.S. 8180 5.4 6.0 90 6.1 8.1 75
Lily Lake 9133 4.6 4.9 94 5.9 7.8 76
Monte Cristo 8932 11.7 9.7 121 10.8 11.3 96
Salt River Summit 7640 4.4 4.6 96 5.1 7.2 71
Spring Creek Divide 9000 7.6 9.4 81 7.6 10.4 73
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Basin Index (%) 101 82
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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.
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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.
