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April 15, 2011 · Shelby County · 2011
EF0

April 15, 2011

3:59 PM
Shelby County, Alabama · Near Alabaster (ZIP 35007)
Fatalities
0
Injuries
0
Path Length
1.4 mi
Max Width
50 yd
DateApril 15, 2011
Time3:59 PM
CountyShelby
CityAlabaster
Property Loss$15250.00M
Crop Loss$0
SourceNCEI 310520
NWS Birmingham

2.9 WNW Wilsonville - 3 NNE Wilsonville Winds were estimated between 85 and 90 mph. The tornado touched down 2.5 miles northwest of Wilsonville on Largin Road. Several trees were snapped off or were uprooted in this location. The tornado tracked northeastward and moved just north of Wilsonville. The tornado lifted just north of Highway 25 near the Lay Lake Inlet. The most concentrate damage occurred at the very end of the damage path near County Road 441. Several trees were snapped off or were uprooted from County Road 441 to the end point. Additionally, one home suffered roof damage and one horse trailer was thrown at least 100 yards. Much of the tornado damage path was much weaker damage and was generally limited to broken tree limbs. Start: 33.2477/-86.5256 End: 33.2680/-86.4537

NWS EF Scale: F1

Event Narrative

A tornado touched down in Alabaster, at the Evangel Church on Thompson Road. The Evangel Church had some minor roof damage on its property. The tornado moved northeastward where it uprooted several trees along 8th Street SW and 6th Street SW. Several of those trees landed on homes. The tornado was rated an EF-0, with maximum winds of 70 mph. The tornado lifted near Highway 31 at the Alabaster City Hall.

Episode Narrative

A potent storm system, which wreaked havoc across the eastern half of the United States on April 14-16, produced a significant and historic tornado outbreak across Central Alabama on April 15. Forty tornadoes, 30 of which touched down in Central Alabama, occurred in the state. At the time, this set a new record for number of tornadoes within the state from one event. This record was broken on April 27, 2011. ||A surface low developed across the Central Plains on Thursday, April 14, and strengthened as it moved into the mid-Mississippi River Valley. In response, surface dew points in the middle to upper 60s surged northward into Central Alabama and deep vertical wind shear increased, providing support for tornadic supercell development. A weakening line of thunderstorms moved into northwest Central Alabama early Friday morning. The southern end of this line intensified by mid day as it encountered a more unstable airmass. South of the line, supercells formed in Mississippi and tracked eastward into west Central Alabama. The entire system pushed east across the area over the course of about twelve hours, exiting east Central Alabama in the early morning hours on Saturday, April 16. In addition to the thirty tornadoes, the storm system produced widespread straight line wind damage and numerous large hail reports.

Outbreak Context

Part of 43-tornado outbreak on April 15, 2011

EF1Clarke CountyView →EF0Choctaw CountyView →EF0Choctaw CountyView →EF1Choctaw, Marengo CountyView →EF2Washington CountyView →EF2Sumter CountyView →EF1Monroe CountyView →EF3Greene, Tuscaloosa CountyView →EF2Hale CountyView →EF2Sumter CountyView →EF1Bibb CountyView →EF2Sumter, Greene CountyView →EF2Greene, Hale CountyView →EF3Marengo County1 fatalView →EF2Monroe CountyView →EF2Marengo CountyView →EF2Monroe, Butler CountyView →EF2Marengo CountyView →EF1Shelby CountyView →EF0Perry CountyView →EF2Choctaw, Marengo CountyView →EF2Perry CountyView →EF1Dallas CountyView →EF0Lowndes CountyView →EF1Dallas CountyView →EF1Dallas CountyView →EF1Autauga CountyView →EF1Autauga CountyView →EF0Autauga CountyView →EF2Clarke CountyView →EF1Dallas CountyView →EF0Elmore CountyView →EF1Autauga CountyView →EF2Autauga CountyView →EF0Mobile CountyView →EF2Monroe CountyView →EF3Autauga County3 fatalView →EF2Butler CountyView →EF2Elmore, Coosa, Tallapoosa CountyView →EF1Escambia CountyView →EF1Tallapoosa CountyView →EF2Escambia, Conecuh, Covington CountyView →
Shared Episode Narrative

A potent storm system, which wreaked havoc across the eastern half of the United States on April 14-16, produced a significant and historic tornado outbreak across Central Alabama on April 15. Forty tornadoes, 30 of which touched down in Central Alabama, occurred in the state. At the time, this set a new record for number of tornadoes within the state from one event. This record was broken on April 27, 2011. ||A surface low developed across the Central Plains on Thursday, April 14, and strengthened as it moved into the mid-Mississippi River Valley. In response, surface dew points in the middle to upper 60s surged northward into Central Alabama and deep vertical wind shear increased, providing support for tornadic supercell development. A weakening line of thunderstorms moved into northwest Central Alabama early Friday morning. The southern end of this line intensified by mid day as it encountered a more unstable airmass. South of the line, supercells formed in Mississippi and tracked eastward into west Central Alabama. The entire system pushed east across the area over the course of about twelve hours, exiting east Central Alabama in the early morning hours on Saturday, April 16. In addition to the thirty tornadoes, the storm system produced widespread straight line wind damage and numerous large hail reports.

Source Data
NCEI Event ID: 310520

See Also

1.4 mi50 yd wide