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: FEBRUARY 21 , 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 13.7 13.0 105 15.7 16.4 96
Black Bear 8170 28.4 28.0 101 28.2 29.1 97
Blind Bull Sum 8650 15.8 17.1 92 13.1 15.2 86
Cottonwood Creek 7670 16.4 15.7 104 19.2 18.5 104
East Rim Divide 7930 -M 7.5 * -M 9.0 *
Grand Targhee 9260 34.0 27.9 122 25.6 23.7 108
Granite Creek 6770 13.9 13.0 107 15.4 15.7 98
Grassy Lake 7265 23.2 24.8 94 26.7 28.1 95
Gros Ventre Summit 8750 7.0 9.3 75 8.1 9.5 85
Gunsight Pass 9820 9.7 10.0 97 11.8 10.2 116
Lewis Lake Divide 7850 22.3 24.4 91 25.8 27.4 94
Phillips Bench 8200 20.9 18.7 112 21.8 21.5 101
Salt River Summit 7640 -M 10.0 * -M 12.8 *
Snake River Station 6920 14.0 13.6 103 18.6 17.8 104
Spring Creek Divide 9000 17.2 17.2 100 18.1 18.3 99
Thumb Divide 7980 11.6 11.2 104 13.0 13.9 94
Togwotee Pass 9580 17.9 16.9 106 18.5 18.4 101
Two Ocean Plateau 9240 20.6 20.4 101 17.3 20.5 84
Willow Creek 8080 21.7 20.7 105 25.4 25.2 101
Younts Peak 8350 -M 11.2 * -M 12.1 *
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Basin Index (%) 102 98
MADISON-GALLATIN
Black Bear 8170 28.4 28.0 101 28.2 29.1 97
Canyon 7870 9.3 9.9 94 11.0 12.5 88
Madison Plateau 7750 17.6 16.7 105 17.9 20.0 90
West Yellowstone 6700 9.6 8.2 117 11.3 11.1 102
Whiskey Creek 6800 12.0 11.3 106 12.6 15.4 82
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Basin Index (%) 104 92
YELLOWSTONE
Beartooth Lake 9360 12.8 15.8 81 11.6 15.0 77
Burnt Mtn 5880 5.5 3.8 145 9.8 9.0 109
Canyon 7870 9.3 9.9 94 11.0 12.5 88
Cole Creek 7850 11.5 9.0 128 -M 8.6 *
Evening Star 9200 18.3 18.4 99 20.9 21.0 100
Fisher Creek 9100 20.5 24.6 83 23.9 24.2 99
Northeast Entrance 7350 7.9 7.6 104 10.2 9.5 107
Parker Peak 9400 16.4 14.9 110 17.0 13.3 128
Sylvan Lake 8420 15.0 15.0 100 20.2 17.1 118
Thumb Divide 7980 11.6 11.2 104 13.0 13.9 94
Two Ocean Plateau 9240 20.6 20.4 101 17.3 20.5 84
White Mill 8700 15.1 17.2 88 13.3 18.1 73
Wolverine 7650 8.1 8.2 99 8.7 9.5 92
Younts Peak 8350 -M 11.2 * -M 12.1 *
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Basin Index (%) 98 96
WIND RIVER
Burroughs Creek 8750 6.6 -M * 8.1 -M *
Castle Creek 8400 3.0 -M * 4.2 -M *
Cold Springs 9630 5.0 5.3 94 5.3 7.1 75
Deer Park 9700 12.6 10.2 124 13.3 14.3 93
Hobbs Park 10100 10.1 9.0 112 7.5 9.0 83
Kirwin 9550 6.7 6.4 105 6.8 8.3 82
Little Warm 9370 6.1 7.7 79 5.6 9.3 60
Owl Creek 8975 4.0 3.6 111 4.5 4.1 110
South Pass 9040 10.5 10.6 99 9.3 12.8 73
St. Lawrence Alt 8620 3.1 4.9 63 6.4 6.1 105
Togwotee Pass 9580 17.9 16.9 106 18.5 18.4 101
Townsend Creek 8700 6.8 6.1 111 7.5 8.2 91
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Basin Index (%) 103 87
BIGHORN BASIN
Bald Mtn. 9380 13.8 13.8 100 9.4 12.3 76
Bear Trap Meadow 8200 6.3 4.0 158 5.3 5.8 91
Bone Springs Div 9350 10.2 11.2 91 8.6 11.0 78
Grave Springs 8550 5.6 6.0 93 6.5 7.4 88
Kirwin 9550 6.7 6.4 105 6.8 8.3 82
Marquette 8760 5.5 -M * 7.1 -M *
Middle Powder 7760 7.0 7.4 95 3.8 8.3 46
Owl Creek 8975 4.0 3.6 111 4.5 4.1 110
Powder River Pass 9480 8.1 7.5 108 7.2 9.0 80
Shell Creek 9580 10.5 10.5 100 9.0 10.0 90
Timber Creek 7950 2.9 3.1 94 4.8 4.9 98
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Basin Index (%) 102 81
SHOSHONE RIVER
Blackwater 9780 15.9 16.3 98 16.6 15.3 108
Evening Star 9200 18.3 18.4 99 20.9 21.0 100
Marquette 8760 5.5 -M * 7.1 -M *
Sylvan Lake 8420 15.0 15.0 100 20.2 17.1 118
Sylvan Road 7120 8.8 8.8 100 11.9 13.4 89
Younts Peak 8350 -M 11.2 * -M 12.1 *
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Basin Index (%) 99 104
POWDER RIVER
Bear Trap Meadow 8200 6.3 4.0 158 5.3 5.8 91
Cloud Peak Reservoir 9860 8.9 9.9 90 7.7 9.0 86
Grave Springs 8550 5.6 6.0 93 6.5 7.4 88
Hansen Sawmill 8360 3.9 4.4 89 5.5 5.7 96
Middle Powder 7760 7.0 7.4 95 3.8 8.3 46
Powder River Pass 9480 8.1 7.5 108 7.2 9.0 80
Soldier Park 8720 2.8 -M * 5.1 -M *
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Basin Index (%) 102 80
TONGUE RIVER
Big Goose 7990 5.5 5.9 93 7.3 7.5 97
Bone Springs Div 9350 10.2 11.2 91 8.6 11.0 78
Burgess Junction 7880 6.2 7.7 81 6.5 8.5 76
Dome Lake 8880 5.9 8.1 73 5.8 9.5 61
Little Goose 8870 6.7 -M * 5.9 -M *
Sucker Creek 8880 8.1 8.3 98 7.3 10.0 73
Tie Creek 6870 3.2 4.1 78 7.3 7.9 92
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Basin Index (%) 86 79
BELLE FOURCHE
Blind Park 6890 7.0 5.9 119 5.9 8.9 66
Cole Canyon 5910 5.3 4.7 113 9.1 6.8 134
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Basin Index (%) 116 96
CHEYENNE RIVER BASIN
Blind Park 6890 7.0 5.9 119 5.9 8.9 66
North Rapid Creek 6130 5.4 5.6 96 5.6 7.2 78
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Basin Index (%) 108 71
UPPER N. PLATTE
Arapaho Ridge 10960 18.1 15.5 117 18.5 16.7 111
Blackhall Mtn 9820 22.9 -M * 24.6 -M *
Columbine 9160 20.7 18.4 112 21.0 19.3 109
Divide Peak 8880 14.8 14.8 100 17.2 16.1 107
Joe Wright 10120 14.6 15.4 95 22.2 18.8 118
Laprele Creek 8375 8.9 7.1 125 9.7 8.9 109
Med Bow 10500 27.1 -M * 25.5 -M *
Never Summer 10280 15.5 14.8 105 13.5 -M *
North French Creek 10130 21.6 19.7 110 22.5 19.9 113
Old Battle 10000 26.2 22.9 114 26.8 26.7 100
Rawah 9020 9.0 7.8 115 11.7 10.2 115
Sage Creek Basin 7850 13.8 10.4 133 13.6 11.3 120
Sand Lake 10050 20.1 19.6 103 16.7 17.9 93
South Brush Creek 8440 8.0 9.3 86 8.7 11.0 79
Tower 10500 38.2 34.4 111 33.8 30.2 112
Webber Springs 9250 18.6 17.6 106 22.5 20.1 112
Whiskey Park 8950 21.7 20.0 108 24.3 21.3 114
Willow Creek Pass 9540 10.6 9.0 118 12.2 9.8 124
Zirkel 9340 23.4 21.9 107 26.8 22.3 120
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Basin Index (%) 109 110
SWEETWATER
Deer Park 9700 12.6 10.2 124 13.3 14.3 93
Larsen Creek 9000 8.5 8.9 96 11.5 -M *
South Pass 9040 10.5 10.6 99 9.3 12.8 73
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Basin Index (%) 106 83
LOWER N. PLATTE
Casper Mtn. 7900 10.7 9.5 113 8.8 10.5 84
Laprele Creek 8375 8.9 7.1 125 9.7 8.9 109
Reno Hill 8400 10.9 9.3 117 11.7 10.5 111
Windy Peak 7900 6.7 5.4 124 6.9 7.4 93
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Basin Index (%) 119 99
LARAMIE RIVER
Brooklyn Lake 10240 16.6 14.4 115 18.1 15.2 119
Cinnabar Park 9574 15.1 16.2 93 17.6 19.0 93
Crow Creek 8330 3.0 6.6 45 6.7 7.5 89
Deadman Hill 10220 13.5 11.9 113 12.6 12.1 104
Rawah 9020 9.0 7.8 115 11.7 10.2 115
Roach 9700 11.6 12.0 97 14.2 13.9 102
Windy Peak 7900 6.7 5.4 124 6.9 7.4 93
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Basin Index (%) 102 103
S. PLATTE
Black Mountain 8920 7.0 -M * 7.8 -M *
Crow Creek 8330 3.0 6.6 45 6.7 7.5 89
Deadman Hill 10220 13.5 11.9 113 12.6 12.1 104
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Basin Index (%) 89 98
LITTLE SNAKE RIVER
Battle Mountain 7440 10.5 9.0 117 12.5 11.6 108
Divide Peak 8880 14.8 14.8 100 17.2 16.1 107
Elk River 8700 14.7 14.2 104 13.8 15.2 91
Little Snake River 8915 20.7 18.9 110 28.5 24.2 118
Old Battle 10000 26.2 22.9 114 26.8 26.7 100
Sage Creek Basin 7850 13.8 10.4 133 13.6 11.3 120
Sandstone RS 8150 12.8 10.2 125 13.8 14.3 97
Whiskey Park 8950 21.7 20.0 108 24.3 21.3 114
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Basin Index (%) 112 107
UPPER GREEN RIVER
Big Sandy Opening 9080 10.3 9.4 110 11.2 9.9 113
Blind Bull Sum 8650 15.8 17.1 92 13.1 15.2 86
East Rim Divide 7930 -M 7.5 * -M 9.0 *
Elkhart Park G.S. 9400 8.7 8.9 98 9.9 9.9 100
Gros Ventre Summit 8750 7.0 9.3 75 8.1 9.5 85
Gunsight Pass 9820 9.7 10.0 97 11.8 10.2 116
Indian Creek 9425 16.2 17.4 93 13.3 16.8 79
Kendall R.S. 7740 8.2 9.3 88 8.8 11.0 80
Loomis Park 8240 -M 11.0 * -M 13.3 *
New Fork Lake 8340 7.3 7.7 95 6.9 8.2 84
Pocket Creek 9360 10.8 -M * 11.8 -M *
Snyder Basin 8060 8.9 9.1 98 10.6 10.9 97
Spring Creek Divide 9000 17.2 17.2 100 18.1 18.3 99
Triple Peak 8500 17.1 16.0 107 19.1 19.0 101
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Basin Index (%) 96 94
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.3 -M * 9.7 -M *
Buck Pasture 9632 11.7 -M * 14.6 -M *
EF Blacks Fork GS 9360 8.9 -M * 7.7 -M *
Hams Fork 7840 8.0 8.7 92 8.6 8.7 99
Hewinta 9500 7.5 7.3 103 10.4 10.2 102
Hickerson Park 9122 6.0 5.3 113 8.0 7.1 113
Hole-in-Rock 9168 4.4 5.1 86 7.4 6.7 110
Indian Creek 9425 16.2 17.4 93 13.3 16.8 79
Kelley R.S. 8180 10.5 11.0 95 11.3 13.8 82
Spirit Lk 10235 11.7 -M * 12.0 -M *
Steel Creek Park 10158 11.2 10.7 105 13.3 11.7 114
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Basin Index (%) 97 96
UPPER BEAR RIVER
Bear River RS 8777 8.1 -M * 11.2 -M *
Bug Lake 7987 16.5 13.8 120 17.7 14.7 120
Burts Miller Ranch 8000 5.2 -M * 6.4 -M *
Chalk Creek #1 9171 18.6 17.0 109 21.9 18.6 118
Hayden Fork 9130 13.3 11.4 117 18.2 15.5 117
Kelley R.S. 8180 10.5 11.0 95 11.3 13.8 82
Lily Lake 9133 9.3 9.6 97 12.4 12.6 98
Monte Cristo 8932 23.3 19.6 119 23.3 19.5 119
Salt River Summit 7640 -M 10.0 * -M 12.8 *
Spring Creek Divide 9000 17.2 17.2 100 18.1 18.3 99
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Basin Index (%) 109 109
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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.