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May 6, 2009 · Morgan County · 2009
EF0

May 6, 2009

7:42 AM
Morgan County, Alabama · Near Decatur (ZIP 35601)
Fatalities
0
Injuries
0
Path Length
0.7 mi
Max Width
75 yd
DateMay 6, 2009
Time7:42 AM
CountyMorgan
CityDecatur
Property Loss$50000.00M
Crop Loss$0
SourceNCEI 169939
NWS Birmingham

1.7 N Oakworth - 1.6 NW Fairview A tornado briefly touched down near the intersection of 7th Avenue and 5th Street in Decatur with peak winds of 80 mph. Trees were uprooted and snapped along the brief damage path. Several homes and vehicles were also damaged by the downed trees. The tornado lifted near the intersection of 16th Avenue and Sherman Street. Start: 34.5949/-86.9789 End: 34.5985/-86.9669

NWS EF Scale: F0

Event Narrative

The tornado continued its track northeast into western portions of Morgan County. Numerous large trees were uprooted and snapped along it's path. Minor structural damage to homes occurred as trees were knocked down onto them. The tornado lifted about half of a mile north of the intersection of Raper Road and Pleasant Hill Road.

Episode Narrative

Strong thunderstorms erupted around Midnight on the 6th in northwest Alabama and tracked across portions of north Alabama. The storms produced one to three inches of rainfall in parts of Lawrence, Morgan, Cullman and Marshall Counties resulting in a few instances of flash flooding. Following this first round of thunderstorms, a vigorous quasi-linear convective system (QLCS) advanced eastward from northern Mississippi into northwest Alabama before sunrise. This system strengthened as it encountered increasing instability. Given high amounts of low level wind shear, a break in the line resulted as a strong comma head / mesocyclone developed. This storm evolved into its own miniature supercell spawning three tornadoes along its track from eastern Lawrence through Morgan, Limestone and Madison Counties. The tornado in Limestone and Madison County produced up to EF2 damage along its 10.9 mile track, narrowly missing an elementary school, high school, and two churches in Madison. Other reports of thunderstorm wind damage were received with these storms.

Outbreak Context

Part of 12-tornado outbreak on May 6, 2009

Shared Episode Narrative

Strong thunderstorms erupted around Midnight on the 6th in northwest Alabama and tracked across portions of north Alabama. The storms produced one to three inches of rainfall in parts of Lawrence, Morgan, Cullman and Marshall Counties resulting in a few instances of flash flooding. Following this first round of thunderstorms, a vigorous quasi-linear convective system (QLCS) advanced eastward from northern Mississippi into northwest Alabama before sunrise. This system strengthened as it encountered increasing instability. Given high amounts of low level wind shear, a break in the line resulted as a strong comma head / mesocyclone developed. This storm evolved into its own miniature supercell spawning three tornadoes along its track from eastern Lawrence through Morgan, Limestone and Madison Counties. The tornado in Limestone and Madison County produced up to EF2 damage along its 10.9 mile track, narrowly missing an elementary school, high school, and two churches in Madison. Other reports of thunderstorm wind damage were received with these storms.

Source Data
NCEI Event ID: 169939

See Also

0.7 mi75 yd wide