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 17 , 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 4.7 5.6 84 5.2 8.2 63
Black Bear 8170 9.8 13.5 73 10.0 14.4 69
Blind Bull Sum 8650 7.7 7.4 104 5.0 7.7 65
Cottonwood Creek 7670 8.5 6.6 129 8.5 9.1 93
East Rim Divide 7930 3.6 3.2 112 3.1 4.5 69
Grand Targhee 9260 15.2 13.7 111 9.2 12.3 75
Granite Creek 6770 4.2 4.4 95 4.8 7.5 64
Grassy Lake 7265 8.2 9.5 86 14.3 13.5 106
Gros Ventre Summit 8750 3.9 4.7 83 3.9 5.1 76
Gunsight Pass 9820 4.7 4.2 112 4.9 5.2 94
Lewis Lake Divide 7850 6.8 9.7 70 9.5 13.6 70
Phillips Bench 8200 8.1 8.3 98 8.1 10.2 79
Salt River Summit 7640 4.3 3.4 126 4.9 6.0 82
Snake River Station 6920 5.3 4.9 108 7.0 9.0 78
Spring Creek Divide 9000 7.2 7.8 92 7.3 8.8 83
Thumb Divide 7980 4.3 4.5 96 5.3 7.2 74
Togwotee Pass 9580 10.0 9.1 110 9.2 9.5 97
Two Ocean Plateau 9240 10.5 10.6 99 7.8 10.6 74
Willow Creek 8080 9.0 8.3 108 10.9 12.8 85
Younts Peak 8350 6.2 5.5 113 3.5 6.4 55
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Basin Index (%) 98 78
MADISON-GALLATIN
Black Bear 8170 9.8 13.5 73 10.0 14.4 69
Canyon 7870 4.5 4.1 110 4.7 6.4 73
Madison Plateau 7750 6.4 7.9 81 6.2 10.0 62
West Yellowstone 6700 3.3 3.3 100 2.8 5.7 49
Whiskey Creek 6800 4.6 4.7 98 5.1 8.0 64
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Basin Index (%) 85 65
YELLOWSTONE
Beartooth Lake 9360 8.7 7.9 110 7.7 7.5 103
Burnt Mtn 5880 1.7 1.6 106 5.8 6.1 95
Canyon 7870 4.5 4.1 110 4.7 6.4 73
Cole Creek 7850 -M 5.6 * 5.7 5.7 100
Evening Star 9200 10.2 9.0 113 11.3 10.9 104
Fisher Creek 9100 10.7 11.8 91 11.5 12.2 94
Northeast Entrance 7350 3.9 2.7 144 5.0 5.1 98
Parker Peak 9400 9.9 7.9 125 9.0 7.2 125
Sylvan Lake 8420 7.7 7.3 105 8.8 9.3 95
Thumb Divide 7980 4.3 4.5 96 5.3 7.2 74
Two Ocean Plateau 9240 10.5 10.6 99 7.8 10.6 74
White Mill 8700 9.6 8.0 120 7.2 9.3 77
Wolverine 7650 5.1 3.4 150 5.9 5.2 113
Younts Peak 8350 6.2 5.5 113 3.5 6.4 55
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Basin Index (%) 110 91
WIND RIVER
Burroughs Creek 8750 4.6 -M * 6.1 -M *
Castle Creek 8400 2.5 -M * 3.7 -M *
Cold Springs 9630 3.4 2.7 126 3.3 4.4 75
Deer Park 9700 5.1 5.0 102 4.3 7.3 59
Hobbs Park 10100 5.1 5.8 88 4.8 5.4 89
Kirwin 9550 6.0 4.0 150 4.6 4.8 96
Little Warm 9370 5.3 3.7 143 3.1 5.3 58
Owl Creek 8975 2.5 2.2 114 2.9 2.6 112
South Pass 9040 4.1 5.3 77 3.6 7.1 51
St. Lawrence Alt 8620 2.6 2.6 100 3.3 3.8 87
Togwotee Pass 9580 10.0 9.1 110 9.2 9.5 97
Townsend Creek 8700 4.2 3.3 127 4.3 5.2 83
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Basin Index (%) 111 78
BIGHORN BASIN
Bald Mtn. 9380 9.8 6.9 142 6.4 6.6 97
Bear Trap Meadow 8200 4.4 2.1 210 5.3 3.7 143
Bone Springs Div 9350 7.5 6.2 121 5.4 6.0 90
Grave Springs 8550 4.8 2.5 192 5.9 4.3 137
Kirwin 9550 6.0 4.0 150 4.6 4.8 96
Marquette 8760 3.7 -M * 4.6 -M *
Middle Powder 7760 5.6 3.7 151 6.2 5.3 117
Owl Creek 8975 2.5 2.2 114 2.9 2.6 112
Powder River Pass 9480 6.2 3.7 168 6.1 5.0 122
Shell Creek 9580 6.9 6.0 115 4.9 5.6 88
Timber Creek 7950 3.3 1.9 174 3.7 3.6 103
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Basin Index (%) 145 108
SHOSHONE RIVER
Blackwater 9780 9.4 8.8 107 8.5 8.5 100
Evening Star 9200 10.2 9.0 113 11.3 10.9 104
Marquette 8760 3.7 -M * 4.6 -M *
Sylvan Lake 8420 7.7 7.3 105 8.8 9.3 95
Sylvan Road 7120 4.6 4.1 112 7.0 7.6 92
Younts Peak 8350 6.2 5.5 113 3.5 6.4 55
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Basin Index (%) 110 92
POWDER RIVER
Bear Trap Meadow 8200 4.4 2.1 210 5.3 3.7 143
Cloud Peak Reservoir 9860 5.6 4.9 114 6.2 5.5 113
Grave Springs 8550 4.8 2.5 192 5.9 4.3 137
Hansen Sawmill 8360 3.1 2.2 141 4.0 3.6 111
Middle Powder 7760 5.6 3.7 151 6.2 5.3 117
Powder River Pass 9480 6.2 3.7 168 6.1 5.0 122
Soldier Park 8720 2.1 -M * 4.2 -M *
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Basin Index (%) 155 123
TONGUE RIVER
Big Goose 7990 3.4 3.0 113 4.9 4.6 107
Bone Springs Div 9350 7.5 6.2 121 5.4 6.0 90
Burgess Junction 7880 4.7 3.8 124 -M 5.0 *
Dome Lake 8880 3.6 4.4 82 3.2 5.9 54
Little Goose 8870 4.4 -M * 3.9 -M *
Sucker Creek 8880 5.8 4.1 141 4.9 5.7 86
Tie Creek 6870 3.0 1.1 273 5.9 4.8 123
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Basin Index (%) 124 90
BELLE FOURCHE
Blind Park 6890 3.6 2.1 171 4.5 5.1 88
Cole Canyon 5910 2.7 1.0 270 -M 4.1 *
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Basin Index (%) 203 88
CHEYENNE RIVER BASIN
Blind Park 6890 3.6 2.1 171 4.5 5.1 88
North Rapid Creek 6130 3.1 2.4 129 4.6 4.3 107
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Basin Index (%) 149 97
UPPER N. PLATTE
Arapaho Ridge 10960 9.1 7.5 121 8.9 9.1 98
Blackhall Mtn 9820 11.0 -M * 11.6 -M *
Columbine 9160 10.5 6.7 157 -M 9.4 *
Divide Peak 8880 8.1 6.3 129 9.1 8.5 107
Joe Wright 10120 6.7 7.9 85 10.4 10.2 102
Laprele Creek 8375 5.7 3.0 190 6.2 5.0 124
Med Bow 10500 15.9 -M * 14.1 -M *
Never Summer 10280 7.8 6.8 115 5.5 -M *
North French Creek 10130 11.9 9.4 127 12.0 9.9 121
Old Battle 10000 12.5 10.3 121 10.4 13.3 78
Rawah 9020 5.5 3.6 153 6.8 6.1 111
Sage Creek Basin 7850 5.9 4.1 144 5.0 5.8 86
Sand Lake 10050 11.2 9.3 120 10.5 9.3 113
South Brush Creek 8440 4.7 3.8 124 5.0 6.0 83
Tower 10500 16.7 16.0 104 15.5 15.2 102
Webber Springs 9250 8.9 7.9 113 9.7 10.3 94
Whiskey Park 8950 11.7 7.5 156 12.7 9.8 130
Willow Creek Pass 9540 5.3 4.5 118 4.7 5.5 85
Zirkel 9340 10.2 7.5 136 12.2 11.1 110
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Basin Index (%) 125 103
SWEETWATER
Deer Park 9700 5.1 5.0 102 4.3 7.3 59
Larsen Creek 9000 -M 3.7 * 2.8 -M *
South Pass 9040 4.1 5.3 77 3.6 7.1 51
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Basin Index (%) 89 55
LOWER N. PLATTE
Casper Mtn. 7900 8.0 4.7 170 5.7 6.4 89
Laprele Creek 8375 5.7 3.0 190 6.2 5.0 124
Reno Hill 8400 7.6 4.9 155 7.7 6.1 126
Windy Peak 7900 4.5 2.5 180 3.7 4.4 84
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Basin Index (%) 171 106
LARAMIE RIVER
Brooklyn Lake 10240 10.2 6.5 157 10.5 7.6 138
Cinnabar Park 9574 10.1 7.4 136 11.4 9.2 124
Crow Creek 8330 4.2 3.6 117 5.7 4.4 130
Deadman Hill 10220 8.1 5.6 145 6.9 6.5 106
Rawah 9020 5.5 3.6 153 6.8 6.1 111
Roach 9700 6.6 5.2 127 6.9 7.3 95
Windy Peak 7900 4.5 2.5 180 3.7 4.4 84
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Basin Index (%) 143 114
S. PLATTE
Black Mountain 8920 5.1 -M * 6.0 -M *
Crow Creek 8330 4.2 3.6 117 5.7 4.4 130
Deadman Hill 10220 8.1 5.6 145 6.9 6.5 106
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Basin Index (%) 134 116
LITTLE SNAKE RIVER
Battle Mountain 7440 5.4 2.8 193 5.5 5.8 95
Divide Peak 8880 8.1 6.3 129 9.1 8.5 107
Elk River 8700 7.9 4.9 161 6.2 7.4 84
Little Snake River 8915 10.1 6.0 168 13.5 11.9 113
Old Battle 10000 12.5 10.3 121 10.4 13.3 78
Sage Creek Basin 7850 5.9 4.1 144 5.0 5.8 86
Sandstone RS 8150 6.6 3.6 183 6.1 7.1 86
Whiskey Park 8950 11.7 7.5 156 12.7 9.8 130
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Basin Index (%) 150 98
UPPER GREEN RIVER
Big Sandy Opening 9080 3.4 4.6 74 2.9 5.2 56
Blind Bull Sum 8650 7.7 7.4 104 5.0 7.7 65
East Rim Divide 7930 3.6 3.2 112 3.1 4.5 69
Elkhart Park G.S. 9400 3.6 4.3 84 3.9 5.3 74
Gros Ventre Summit 8750 3.9 4.7 83 3.9 5.1 76
Gunsight Pass 9820 4.7 4.2 112 4.9 5.2 94
Indian Creek 9425 7.4 7.9 94 6.1 7.9 77
Kendall R.S. 7740 3.4 3.6 94 3.4 5.3 64
Loomis Park 8240 4.5 4.8 94 6.9 6.5 106
New Fork Lake 8340 4.0 3.4 118 -M 4.2 *
Pocket Creek 9360 -M -M * 2.6 -M *
Snider Basin 8060 3.9 3.8 103 4.6 5.3 87
Spring Creek Divide 9000 7.2 7.8 92 7.3 8.8 83
Triple Peak 8500 8.5 6.6 129 8.2 9.0 91
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Basin Index (%) 99 79
LOWER GREEN RIVER
Blacks Fork Jct 8869 2.6 -M * 5.4 -M *
Buck Pasture 9632 7.3 -M * 7.4 -M *
EF Blacks Fork GS 9360 5.4 -M * 5.1 -M *
Hams Fork 7840 3.4 3.4 100 4.2 4.3 98
Hewinta 9500 4.2 2.8 150 6.5 5.7 114
Hickerson Park 9122 5.2 2.0 260 6.1 4.4 139
Hole-in-Rock 9168 5.6 2.3 243 6.0 4.1 146
Indian Creek 9425 7.4 7.9 94 6.1 7.9 77
Kelley R.S. 8180 5.1 4.5 113 5.7 6.8 84
Spirit Lk 10235 7.8 -M * 8.7 -M *
Steel Creek Park 10158 7.2 5.4 133 8.1 6.5 125
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Basin Index (%) 135 108
UPPER BEAR RIVER
Bear River RS 8777 3.5 -M * 4.7 -M *
Bug Lake 7987 7.5 5.2 144 7.5 7.5 100
Burts Miller Ranch 8000 3.2 -M * 3.2 -M *
Chalk Creek #1 9171 7.9 8.3 95 7.2 9.8 73
Hayden Fork 9130 6.0 4.2 143 8.5 8.0 106
Kelley R.S. 8180 5.1 4.5 113 5.7 6.8 84
Lily Lake 9133 4.5 4.3 105 5.4 6.9 78
Monte Cristo 8932 11.1 8.0 139 10.1 9.7 104
Salt River Summit 7640 4.3 3.4 126 4.9 6.0 82
Spring Creek Divide 9000 7.2 7.8 92 7.3 8.8 83
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Basin Index (%) 117 89
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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.