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 WEDNESDAY: FEBRUARY 27 , 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 16.6 13.3 125 18.6 17.1 109
Black Bear 8170 35.5 29.1 122 35.6 30.5 117
Blind Bull Sum 8650 18.0 17.6 102 14.8 15.8 94
Cottonwood Creek 7670 17.0 16.4 104 19.9 19.4 103
East Rim Divide 7930 8.9 7.9 113 9.2 9.5 97
Grand Targhee 9260 35.8 29.4 122 27.2 24.6 111
Granite Creek 6770 16.0 13.5 119 17.3 16.4 105
Grassy Lake 7265 27.8 25.7 108 31.2 29.2 107
Gros Ventre Summit 8750 8.1 9.5 85 9.6 10.0 96
Gunsight Pass 9820 10.7 10.4 103 12.7 10.7 119
Lewis Lake Divide 7850 28.7 25.1 114 29.9 28.5 105
Phillips Bench 8200 24.6 19.4 127 -M 22.5 *
Salt River Summit 7640 10.7 10.4 103 12.6 13.3 95
Snake River Station 6920 17.3 14.0 124 22.1 18.5 119
Spring Creek Divide 9000 18.6 18.1 103 19.5 19.1 102
Thumb Divide 7980 15.1 11.9 127 15.4 14.5 106
Togwotee Pass 9580 20.4 17.5 117 20.6 19.2 107
Two Ocean Plateau 9240 25.1 21.4 117 20.4 21.5 95
Willow Creek 8080 23.0 22.0 105 26.8 26.6 101
Younts Peak 8350 -M 11.5 * -M 12.5 *
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Basin Index (%) 114 106
MADISON-GALLATIN
Black Bear 8170 35.5 29.1 122 35.6 30.5 117
Canyon 7870 11.2 10.4 108 13.0 12.9 101
Madison Plateau 7750 23.4 17.6 133 23.0 21.0 110
West Yellowstone 6700 12.4 8.8 141 14.2 11.5 123
Whiskey Creek 6800 16.2 11.9 136 16.5 16.1 102
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Basin Index (%) 127 111
YELLOWSTONE
Beartooth Lake 9360 15.8 16.2 98 14.5 15.6 93
Burnt Mtn 5880 6.9 4.0 172 10.9 9.2 118
Canyon 7870 11.2 10.4 108 13.0 12.9 101
Cole Creek 7850 12.5 9.5 132 -M 8.9 *
Evening Star 9200 21.4 18.9 113 23.8 21.9 109
Fisher Creek 9100 24.7 25.4 97 27.7 25.2 110
Northeast Entrance 7350 8.6 7.9 109 10.7 9.8 109
Parker Peak 9400 -M 15.8 * 18.1 13.8 131
Sylvan Lake 8420 17.2 15.7 110 22.6 17.8 127
Thumb Divide 7980 15.1 11.9 127 15.4 14.5 106
Two Ocean Plateau 9240 25.1 21.4 117 20.4 21.5 95
White Mill 8700 17.1 18.0 95 15.1 18.8 80
Wolverine 7650 10.0 8.5 118 10.3 9.9 104
Younts Peak 8350 -M 11.5 * -M 12.5 *
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Basin Index (%) 111 106
WIND RIVER
Burroughs Creek 8750 8.9 -M * 10.7 -M *
Castle Creek 8400 3.6 -M * 5.0 -M *
Cold Springs 9630 5.6 5.4 104 5.9 7.4 80
Deer Park 9700 13.5 10.8 125 14.6 15.0 97
Hobbs Park 10100 11.3 9.4 120 8.5 9.3 91
Kirwin 9550 8.7 6.8 128 8.8 8.7 101
Little Warm 9370 7.0 7.8 90 7.2 9.8 73
Owl Creek 8975 4.3 3.8 113 4.9 4.2 117
South Pass 9040 11.5 11.2 103 9.8 13.3 74
St. Lawrence Alt 8620 3.7 5.0 74 7.0 6.4 109
Togwotee Pass 9580 20.4 17.5 117 20.6 19.2 107
Townsend Creek 8700 7.5 6.3 119 8.3 8.5 98
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Basin Index (%) 111 94
BIGHORN BASIN
Bald Mtn. 9380 14.3 14.4 99 10.2 12.9 79
Bear Trap Meadow 8200 6.7 4.3 156 5.9 6.0 98
Bone Springs Div 9350 10.6 11.6 91 9.2 11.6 79
Grave Springs 8550 5.9 6.6 89 6.9 7.7 90
Kirwin 9550 8.7 6.8 128 8.8 8.7 101
Marquette 8760 5.9 -M * 7.3 -M *
Middle Powder 7760 7.2 7.8 92 4.2 8.6 49
Owl Creek 8975 4.3 3.8 113 4.9 4.2 117
Powder River Pass 9480 8.3 7.8 106 7.8 9.4 83
Shell Creek 9580 11.1 11.3 98 9.7 10.4 93
Timber Creek 7950 3.0 3.3 91 4.9 5.1 96
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Basin Index (%) 103 86
SHOSHONE RIVER
Blackwater 9780 18.9 16.9 112 19.2 15.9 121
Evening Star 9200 21.4 18.9 113 23.8 21.9 109
Marquette 8760 5.9 -M * 7.3 -M *
Sylvan Lake 8420 17.2 15.7 110 22.6 17.8 127
Sylvan Road 7120 10.2 9.2 111 13.4 13.8 97
Younts Peak 8350 -M 11.5 * -M 12.5 *
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Basin Index (%) 112 114
POWDER RIVER
Bear Trap Meadow 8200 6.7 4.3 156 5.9 6.0 98
Cloud Peak Reservoir 9860 9.3 10.2 91 8.5 9.4 90
Grave Springs 8550 5.9 6.6 89 6.9 7.7 90
Hansen Sawmill 8360 4.3 4.6 93 5.8 5.9 98
Middle Powder 7760 7.2 7.8 92 4.2 8.6 49
Powder River Pass 9480 8.3 7.8 106 7.8 9.4 83
Soldier Park 8720 2.9 -M * 5.4 -M *
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Basin Index (%) 101 83
TONGUE RIVER
Big Goose 7990 5.8 6.1 95 7.6 7.7 99
Bone Springs Div 9350 10.6 11.6 91 9.2 11.6 79
Burgess Junction 7880 6.4 8.1 79 6.9 8.9 78
Dome Lake 8880 6.5 8.5 76 6.3 9.8 64
Little Goose 8870 7.1 -M * 6.1 -M *
Sucker Creek 8880 8.4 8.7 97 8.0 10.4 77
Tie Creek 6870 3.5 4.2 83 7.8 8.2 95
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Basin Index (%) 87 81
BELLE FOURCHE
Blind Park 6890 6.9 6.3 110 6.2 9.2 67
Cole Canyon 5910 5.2 5.0 104 9.1 7.0 130
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Basin Index (%) 107 94
CHEYENNE RIVER BASIN
Blind Park 6890 6.9 6.3 110 6.2 9.2 67
North Rapid Creek 6130 5.5 5.8 95 5.6 7.5 75
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Basin Index (%) 102 71
UPPER N. PLATTE
Arapaho Ridge 10960 18.4 16.3 113 19.0 17.4 109
Blackhall Mtn 9820 23.3 -M * 25.1 -M *
Columbine 9160 21.1 19.4 109 21.7 20.2 107
Divide Peak 8880 15.1 15.4 98 17.9 16.6 108
Joe Wright 10120 14.9 16.2 92 22.3 19.7 113
Laprele Creek 8375 9.1 7.6 120 9.9 9.2 108
Med Bow 10500 27.6 -M * 25.9 -M *
Never Summer 10280 15.8 15.9 99 13.9 -M *
North French Creek 10130 21.8 20.8 105 22.7 20.8 109
Old Battle 10000 26.9 23.7 114 27.9 27.5 101
Rawah 9020 9.0 8.5 106 11.9 10.7 111
Sage Creek Basin 7850 14.1 10.5 134 13.8 11.5 120
Sand Lake 10050 20.7 20.8 100 17.3 18.6 93
South Brush Creek 8440 8.1 10.0 81 9.1 11.6 78
Tower 10500 38.9 35.7 109 34.4 31.5 109
Webber Springs 9250 19.0 18.4 103 23.1 20.9 111
Whiskey Park 8950 22.0 21.0 105 24.9 22.1 113
Willow Creek Pass 9540 10.8 9.3 116 12.7 10.2 125
Zirkel 9340 23.9 22.7 105 28.0 23.2 121
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Basin Index (%) 106 109
SWEETWATER
Deer Park 9700 13.5 10.8 125 14.6 15.0 97
Larsen Creek 9000 9.5 9.3 102 12.3 -M *
South Pass 9040 11.5 11.2 103 9.8 13.3 74
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Basin Index (%) 110 86
LOWER N. PLATTE
Casper Mtn. 7900 10.7 9.9 108 9.0 10.9 83
Laprele Creek 8375 9.1 7.6 120 9.9 9.2 108
Reno Hill 8400 11.2 9.7 115 12.0 10.9 110
Windy Peak 7900 7.1 5.7 125 7.5 7.7 97
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Basin Index (%) 116 99
LARAMIE RIVER
Brooklyn Lake 10240 16.9 14.7 115 18.5 15.8 117
Cinnabar Park 9574 15.6 16.8 93 18.1 19.4 93
Crow Creek 8330 3.1 6.6 47 6.8 7.7 88
Deadman Hill 10220 13.9 12.3 113 13.0 12.6 103
Rawah 9020 9.0 8.5 106 11.9 10.7 111
Roach 9700 11.9 12.2 98 14.7 14.5 101
Windy Peak 7900 7.1 5.7 125 7.5 7.7 97
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Basin Index (%) 101 102
S. PLATTE
Black Mountain 8920 7.3 -M * 8.2 -M *
Crow Creek 8330 3.1 6.6 47 6.8 7.7 88
Deadman Hill 10220 13.9 12.3 113 13.0 12.6 103
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Basin Index (%) 90 98
LITTLE SNAKE RIVER
Battle Mountain 7440 10.3 9.7 106 12.7 12.0 106
Divide Peak 8880 15.1 15.4 98 17.9 16.6 108
Elk River 8700 14.7 15.0 98 14.3 15.8 91
Little Snake River 8915 21.3 19.6 109 29.6 24.7 120
Old Battle 10000 26.9 23.7 114 27.9 27.5 101
Sage Creek Basin 7850 14.1 10.5 134 13.8 11.5 120
Sandstone RS 8150 12.9 10.3 125 14.1 14.9 95
Whiskey Park 8950 22.0 21.0 105 24.9 22.1 113
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Basin Index (%) 110 107
UPPER GREEN RIVER
Big Sandy Opening 9080 11.1 9.8 113 12.1 10.4 116
Blind Bull Sum 8650 18.0 17.6 102 14.8 15.8 94
East Rim Divide 7930 8.9 7.9 113 9.2 9.5 97
Elkhart Park G.S. 9400 10.0 9.3 108 10.7 10.4 103
Gros Ventre Summit 8750 8.1 9.5 85 9.6 10.0 96
Gunsight Pass 9820 10.7 10.4 103 12.7 10.7 119
Indian Creek 9425 17.3 18.5 94 14.0 17.6 80
Kendall R.S. 7740 9.2 9.7 95 9.8 11.6 84
Loomis Park 8240 13.0 11.6 112 14.0 13.9 101
New Fork Lake 8340 7.9 8.1 98 7.5 8.7 86
Pocket Creek 9360 11.5 -M * 12.6 -M *
Snyder Basin 8060 9.7 9.4 103 11.4 11.4 100
Spring Creek Divide 9000 18.6 18.1 103 19.5 19.1 102
Triple Peak 8500 18.4 16.5 112 20.5 20.0 102
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Basin Index (%) 103 98
LOWER GREEN RIVER
Blacks Fork Jct 8869 6.7 -M * 9.6 -M *
Buck Pasture 9632 11.7 -M * 14.5 -M *
EF Blacks Fork GS 9360 9.2 -M * 7.7 -M *
Hams Fork 7840 8.3 9.1 91 8.7 9.1 96
Hewinta 9500 7.7 7.7 100 10.7 10.7 100
Hickerson Park 9122 6.1 5.7 107 8.5 7.4 115
Hole-in-Rock 9168 4.9 5.5 89 7.9 7.0 113
Indian Creek 9425 17.3 18.5 94 14.0 17.6 80
Kelley R.S. 8180 11.2 11.9 94 11.8 14.4 82
Spirit Lk 10235 12.1 -M * 12.5 -M *
Steel Creek Park 10158 11.2 11.3 99 13.5 12.2 111
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Basin Index (%) 96 96
UPPER BEAR RIVER
Bear River RS 8777 8.4 -M * 11.3 -M *
Bug Lake 7987 17.6 14.5 121 18.2 15.3 119
Burts Miller Ranch 8000 5.3 -M * 6.7 -M *
Chalk Creek #1 9171 18.8 17.9 105 23.1 19.2 120
Hayden Fork 9130 13.3 11.8 113 18.2 16.2 112
Kelley R.S. 8180 11.2 11.9 94 11.8 14.4 82
Lily Lake 9133 9.4 10.0 94 12.5 13.0 96
Monte Cristo 8932 23.9 20.4 117 23.8 20.3 117
Salt River Summit 7640 10.7 10.4 103 12.6 13.3 95
Spring Creek Divide 9000 18.6 18.1 103 19.5 19.1 102
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Basin Index (%) 107 107
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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.