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 MONDAY: FEBRUARY 17 , 2020
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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 13.0 12.8 102 13.4 15.7 85
Black Bear 8170 25.8 27.3 95 24.3 28.2 86
Blind Bull Sum 8650 20.5 16.3 126 12.1 14.6 83
Cottonwood Creek 7670 22.1 15.0 147 23.3 17.9 130
East Rim Divide 7930 9.9 7.4 134 7.9 8.6 92
Grand Targhee 9260 32.9 26.9 122 22.9 23.4 98
Granite Creek 6770 13.2 12.6 105 12.6 15.2 83
Grassy Lake 7265 25.3 24.3 104 24.9 27.2 92
Gros Ventre Summit 8750 8.8 9.0 98 8.6 9.2 93
Gunsight Pass 9820 10.1 9.6 105 10.1 10.1 100
Lewis Lake Divide 7850 19.8 23.5 84 22.9 26.4 87
Phillips Bench 8200 22.3 18.1 123 21.6 20.7 104
Salt River Summit 7640 12.3 9.5 129 12.5 12.2 102
Snake River Station 6920 13.5 13.3 102 15.9 17.3 92
Spring Creek Divide 9000 21.2 16.5 128 20.2 17.6 115
Thumb Divide 7980 11.0 10.9 101 11.1 13.5 82
Togwotee Pass 9580 21.0 16.6 127 20.0 17.8 112
Two Ocean Plateau 9240 22.3 19.7 113 17.3 19.7 88
Willow Creek 8080 28.1 19.8 142 27.9 24.4 114
Younts Peak 8350 13.4 11.0 122 10.7 11.7 91
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Basin Index (%) 114 97
MADISON-GALLATIN
Black Bear 8170 25.8 27.3 95 24.3 28.2 86
Canyon 7870 10.7 9.5 113 10.9 12.0 91
Madison Plateau 7750 16.1 15.9 101 11.7 19.2 61
West Yellowstone 6700 8.7 7.8 112 7.4 10.8 69
Whiskey Creek 6800 11.5 10.9 106 13.2 14.9 89
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Basin Index (%) 102 79
YELLOWSTONE
Beartooth Lake 9360 17.1 15.5 110 15.8 14.5 109
Burnt Mtn 5880 4.9 3.6 136 9.7 8.8 110
Canyon 7870 10.7 9.5 113 10.9 12.0 91
Cole Creek 7850 13.7 8.9 154 10.2 8.4 121
Evening Star 9200 21.3 17.8 120 23.0 20.4 113
Fisher Creek 9100 24.2 23.6 103 24.7 23.4 106
Northeast Entrance 7350 8.6 7.5 115 9.6 9.3 103
Parker Peak 9400 19.8 14.3 138 17.4 12.8 136
Sylvan Lake 8420 16.0 14.4 111 17.8 16.6 107
Thumb Divide 7980 11.0 10.9 101 11.1 13.5 82
Two Ocean Plateau 9240 22.3 19.7 113 17.3 19.7 88
White Mill 8700 19.8 16.4 121 16.2 17.5 93
Wolverine 7650 11.2 8.0 140 10.7 9.2 116
Younts Peak 8350 13.4 11.0 122 10.7 11.7 91
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Basin Index (%) 118 104
WIND RIVER
Burroughs Creek 8750 9.4 -M * 10.8 -M *
Castle Creek 8400 4.2 -M * 4.9 -M *
Cold Springs 9630 5.9 5.2 113 5.5 6.8 81
Deer Park 9700 9.3 9.9 94 8.2 14.1 58
Hobbs Park 10100 9.6 8.7 110 8.1 8.7 93
Kirwin 9550 8.6 6.2 139 7.3 8.1 90
Little Warm 9370 8.7 7.4 118 7.1 9.0 79
Owl Creek 8975 4.8 3.4 141 5.1 3.9 131
South Pass 9040 8.4 10.3 82 7.3 12.3 59
St. Lawrence Alt 8620 4.0 4.6 87 5.2 5.9 88
Togwotee Pass 9580 21.0 16.6 127 20.0 17.8 112
Townsend Creek 8700 6.9 5.9 117 7.0 8.0 88
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Basin Index (%) 112 85
BIGHORN BASIN
Bald Mtn. 9380 17.1 13.2 130 13.4 11.9 113
Bear Trap Meadow 8200 -M 3.8 * 7.6 5.7 133
Bone Springs Div 9350 13.5 10.9 124 11.1 10.7 104
Grave Springs 8550 8.6 5.7 151 -M 7.2 *
Kirwin 9550 8.6 6.2 139 7.3 8.1 90
Marquette 8760 5.4 -M * 6.7 -M *
Middle Powder 7760 10.2 7.2 142 10.3 8.1 127
Owl Creek 8975 4.8 3.4 141 5.1 3.9 131
Powder River Pass 9480 10.0 7.3 137 9.8 8.8 111
Shell Creek 9580 11.6 10.2 114 11.3 9.7 116
Timber Creek 7950 4.8 3.1 155 5.4 4.9 110
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Basin Index (%) 133 113
SHOSHONE RIVER
Blackwater 9780 16.9 15.7 108 16.7 14.9 112
Evening Star 9200 21.3 17.8 120 23.0 20.4 113
Marquette 8760 5.4 -M * 6.7 -M *
Sylvan Lake 8420 16.0 14.4 111 17.8 16.6 107
Sylvan Road 7120 9.7 8.7 111 13.5 13.1 103
Younts Peak 8350 13.4 11.0 122 10.7 11.7 91
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Basin Index (%) 114 107
POWDER RIVER
Bear Trap Meadow 8200 -M 3.8 * 7.6 5.7 133
Cloud Peak Reservoir 9860 10.6 9.7 109 9.9 8.8 112
Grave Springs 8550 8.6 5.7 151 -M 7.2 *
Hansen Sawmill 8360 5.6 4.3 130 6.6 5.5 120
Middle Powder 7760 10.2 7.2 142 10.3 8.1 127
Powder River Pass 9480 10.0 7.3 137 9.8 8.8 111
Soldier Park 8720 4.0 -M * 6.7 -M *
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Basin Index (%) 132 120
TONGUE RIVER
Big Goose 7990 6.7 5.7 118 7.7 7.3 105
Bone Springs Div 9350 13.5 10.9 124 11.1 10.7 104
Burgess Junction 7880 8.9 7.5 119 10.0 8.3 120
Dome Lake 8880 9.4 7.9 119 7.3 9.2 79
Little Goose 8870 8.0 -M * 6.5 -M *
Sucker Creek 8880 10.9 8.1 135 9.6 9.7 99
Tie Creek 6870 7.1 3.9 182 10.6 7.8 136
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Basin Index (%) 128 106
BELLE FOURCHE
Blind Park 6890 6.3 5.7 111 6.7 8.7 77
Cole Canyon 5910 2.3 4.5 51 -M 6.6 *
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Basin Index (%) 84 77
CHEYENNE RIVER BASIN
Blind Park 6890 6.3 5.7 111 6.7 8.7 77
North Rapid Creek 6130 5.7 5.4 106 6.7 7.1 94
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Basin Index (%) 108 85
UPPER N. PLATTE
Arapaho Ridge 10960 17.8 14.9 119 17.2 16.2 106
Blackhall Mtn 9820 23.5 -M * 23.0 -M *
Columbine 9160 25.0 17.5 143 23.5 18.7 126
Divide Peak 8880 17.4 14.1 123 18.1 15.6 116
Joe Wright 10120 16.1 14.8 109 20.7 18.1 114
Laprele Creek 8375 9.5 6.7 142 9.6 8.5 113
Med Bow 10500 35.9 -M * 29.4 -M *
Never Summer 10280 15.5 14.2 109 11.5 -M *
North French Creek 10130 27.9 19.3 145 26.6 19.1 139
Old Battle 10000 25.1 22.2 113 23.2 25.7 90
Rawah 9020 10.5 7.5 140 11.9 9.9 120
Sage Creek Basin 7850 13.1 9.8 134 10.7 11.0 97
Sand Lake 10050 23.6 18.7 126 21.8 17.2 127
South Brush Creek 8440 11.2 8.6 130 11.1 10.6 105
Tower 10500 36.2 32.8 110 31.2 29.1 107
Webber Springs 9250 17.5 16.8 104 19.0 19.3 98
Whiskey Park 8950 27.7 19.3 144 26.6 20.6 129
Willow Creek Pass 9540 10.6 8.6 123 10.0 9.4 106
Zirkel 9340 23.2 21.0 110 25.4 21.6 118
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Basin Index (%) 123 113
SWEETWATER
Deer Park 9700 9.3 9.9 94 8.2 14.1 58
Larsen Creek 9000 -M 8.6 * 5.9 -M *
South Pass 9040 8.4 10.3 82 7.3 12.3 59
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Basin Index (%) 88 59
LOWER N. PLATTE
Casper Mtn. 7900 12.7 9.0 141 8.6 10.2 84
Laprele Creek 8375 9.5 6.7 142 9.6 8.5 113
Reno Hill 8400 13.1 8.9 147 13.1 10.2 128
Windy Peak 7900 7.7 5.2 148 6.3 7.2 88
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Basin Index (%) 144 104
LARAMIE RIVER
Brooklyn Lake 10240 22.2 13.9 160 21.3 14.6 146
Cinnabar Park 9574 20.0 16.0 125 20.6 18.3 113
Crow Creek 8330 7.1 6.4 111 8.9 7.2 124
Deadman Hill 10220 14.4 11.5 125 12.6 11.6 109
Rawah 9020 10.5 7.5 140 11.9 9.9 120
Roach 9700 11.6 11.6 100 11.2 13.4 84
Windy Peak 7900 7.7 5.2 148 6.3 7.2 88
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Basin Index (%) 130 113
S. PLATTE
Black Mountain 8920 8.8 -M * 10.4 -M *
Crow Creek 8330 7.1 6.4 111 8.9 7.2 124
Deadman Hill 10220 14.4 11.5 125 12.6 11.6 109
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Basin Index (%) 120 114
LITTLE SNAKE RIVER
Battle Mountain 7440 12.4 8.7 143 12.2 11.1 110
Divide Peak 8880 17.4 14.1 123 18.1 15.6 116
Elk River 8700 17.6 13.8 128 14.5 14.6 99
Little Snake River 8915 23.2 18.4 126 27.4 23.3 118
Old Battle 10000 25.1 22.2 113 23.2 25.7 90
Sage Creek Basin 7850 13.1 9.8 134 10.7 11.0 97
Sandstone RS 8150 14.4 9.9 145 13.2 13.8 96
Whiskey Park 8950 27.7 19.3 144 26.6 20.6 129
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Basin Index (%) 130 108
UPPER GREEN RIVER
Big Sandy Opening 9080 7.2 9.0 80 6.1 9.4 65
Blind Bull Sum 8650 20.5 16.3 126 12.1 14.6 83
East Rim Divide 7930 9.9 7.4 134 7.9 8.6 92
Elkhart Park G.S. 9400 8.5 8.6 99 8.0 9.5 84
Gros Ventre Summit 8750 8.8 9.0 98 8.6 9.2 93
Gunsight Pass 9820 10.1 9.6 105 10.1 10.1 100
Indian Creek 9425 18.3 16.6 110 13.0 16.1 81
Kendall R.S. 7740 8.5 9.0 94 8.6 10.5 82
Loomis Park 8240 11.7 10.6 110 14.1 12.7 111
New Fork Lake 8340 8.8 7.5 117 6.5 7.9 82
Pocket Creek 9360 -M -M * 5.9 -M *
Snider Basin 8060 11.4 9.0 127 11.8 10.5 112
Spring Creek Divide 9000 21.2 16.5 128 20.2 17.6 115
Triple Peak 8500 21.6 15.5 139 21.5 18.2 118
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Basin Index (%) 115 96
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.3 -M * 9.5 -M *
Buck Pasture 9632 14.4 -M * 13.9 -M *
EF Blacks Fork GS 9360 11.9 -M * 7.8 -M *
Hams Fork 7840 10.5 8.4 125 9.2 8.3 111
Hewinta 9500 8.6 7.0 123 11.7 9.9 118
Hickerson Park 9122 8.5 5.1 167 8.9 6.9 129
Hole-in-Rock 9168 8.6 4.8 179 8.6 6.5 132
Indian Creek 9425 18.3 16.6 110 13.0 16.1 81
Kelley R.S. 8180 12.7 10.7 119 13.3 13.2 101
Spirit Lk 10235 13.2 -M * 13.9 -M *
Steel Creek Park 10158 11.8 10.3 115 14.3 11.2 128
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Basin Index (%) 126 110
UPPER BEAR RIVER
Bear River RS 8777 7.2 -M * 8.4 -M *
Bug Lake 7987 16.2 13.3 122 14.7 14.1 104
Burts Miller Ranch 8000 5.4 -M * 5.6 -M *
Chalk Creek #1 9171 15.8 16.1 98 14.1 17.8 79
Hayden Fork 9130 13.0 11.0 118 16.2 14.9 109
Kelley R.S. 8180 12.7 10.7 119 13.3 13.2 101
Lily Lake 9133 9.3 9.0 103 9.5 12.1 79
Monte Cristo 8932 22.6 18.9 120 19.1 18.6 103
Salt River Summit 7640 12.3 9.5 129 12.5 12.2 102
Spring Creek Divide 9000 21.2 16.5 128 20.2 17.6 115
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Basin Index (%) 117 99
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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.