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Timber Damage Report (April 2011 Tornadoes)



Two separate storm events on April 15, and April 27, 2011 impacted 39 Counties in Alabama. The tornadoes of April 15th caused damage in 13 Counties with most of the damage inflicted in rural areas. These tornadoes exhibited typical patterns where damage along the track was intermittent with touchdowns and liftoffs occurring sporadically. The tornadic events of April 27th were spawned from supercell activity and demonstrated behavior typical of storm events occurring in the Great Plains region with extremely powerful tornadoes tracking for long distances after touching down. These outbreaks caused damage in 33 Counties some of which were impacted by the April 15th tornadoes. Typical of tornado damage, the impact to the forests of Alabama was incurred along the tracks of the tornadoes with almost total devastation of the standing timber. Depending upon the strength of the tornado the damage path would span anywhere from ⅛th of a mile to a full mile in width.

Assessment of the damage was conducted by the Alabama Forestry Commission (AFC) commencing with
aerial estimation of the damage areas for both events. Damage was either aerially sketch-mapped by AFC personnel or damage paths were identified for length and width with global positioning system (GPS) equipment for inclusion into the AFC geographic information system (GIS). Additional verification of damage paths was achieved through digitizing remotely sensed orthorectified imagery that was obtained through the collaborative efforts of the Statewide GIS task group created for storm response.

The AFC estimates that 26,733 acres of forest land were impacted by the April 15th tornadoes with an assessed value of $37,728,175.00. The impacts from the April 27th tornadoes are estimated to be 177,857 acres with an assessed value of $228,360,576.00. The total for impacts to the forest land in Alabama from the April storms are 204,590 acres with an assessed value of $266,088,751.00.

 

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County STR Damage Maps

AUTAUGA CHOCTAW ETOWAH LAWRENCE MORGAN TUSCALOOSA
BIBB CONECUH FAYETTE LIMESTONE PERRY WALKER
BLOUNT COOSA FRANKLIN MADISON PICKENS WASHINGTON
CALHOUN CULLMAN GREENE MARENGO ST CLAIR WINSTON
CHAMBERS DEKALB HALE MARION SUMTER  
CHEROKEE ELMORE JACKSON MARSHALL TALLADEGA  
CHILTON ESCAMBIA JEFFERSON MONROE TALLAPOOSA