A potent upper level trough of low pressure and strong upper jet streak pushed through the Tennessee Valley on the 26th.  Unseasonably high temperatures in the upper 70s to lower 80s and dew points in the upper 60s to near 70 produced an unstable environment.   Deep layer shear was sufficient for supercell thunderstorms, while low level shear was quite strong as well.  As a result, numerous supercell thunderstorms, many of them low topped, erupted in multiple bands across northern Alabama as early as late morning and lasted into the early evening hours.   The storms brought the potential for severe weather for around eight hours.  Many of the storms contained meso-cyclones, but only four produced brief weak tornadoes.   Others produced wind damage associated with the rear flank downdrafts of the storms or with bowing segments.

Thunderstorm Wind in MARSHALL, ALABAMA
From 26-OCT-10 23:18:00 to 26-OCT-10 23:28:00 (CST-6)
Location: GUNTERSVILLE MUNI AR
Magnitude: 74.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Several trees were blown down.

Thunderstorm Wind in MADISON, ALABAMA
From 26-OCT-10 15:00:00 to 26-OCT-10 15:10:00 (CST-6)
Location: MADISON
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Public

A tree was reported falling on a house on Jackson Ave.

Tornado in DEKALB, ALABAMA
From 26-OCT-10 17:03:00 to 26-OCT-10 17:11:00 (CST-6)
Location: WHITON
Tornado F-scale: EF1
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-1 tornado with peak winds up to 100 mph touched down near the intersection of County Roads 389 and 391.  The tornado snapped trees and tore the roof off of a barn in this area.  Similar damage was observed along County roads 23 and 9.  The tornado weakened briefly producing little damage until crossing Highway 227.  Beginning in that area and extending to County Road 329, significant structural damage was observed.  One location suffered significant damage to a home was that was pushed from it's foundation.  In addition, a nearby workshop sustained heavy damage along with an RV, boat and two vehicles.

Tornado in MARSHALL, ALABAMA
From 26-OCT-10 17:13:00 to 26-OCT-10 17:15:00 (CST-6)
Location: MC VILLE
Tornado F-scale: EF0
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-0 tornado with peak winds up to 70 mph produced light sporadic damage along Hamby Road.  The damage was relegated to a loss of roof materials on barns and light tree damage.  One large tree was snapped by the tornado.

Tornado in LIMESTONE, ALABAMA
From 26-OCT-10 14:40:00 to 26-OCT-10 14:41:00 (CST-6)
Location: GREENBRIER
Tornado F-scale: EF0
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-0 tornado with peak winds up to 70 mph touched down very briefly along Greenbrier Road north of the of the Interstate 565 interchange.  The tornado uprooted several small trees and snapped several large tree limbs.

Strong Wind in COLBERT, ALABAMA
From 26-OCT-10 10:54:00 to 26-OCT-10 10:54:00 (CST-6)
Magnitude: 43.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in LAUDERDALE, ALABAMA
From 26-OCT-10 10:54:00 to 26-OCT-10 11:04:00 (CST-6)
Location: NORTH FLORENCE
Magnitude: 50.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was  uprooted and fell on a house in Florence producing minor damage. Time was estimated by radar.

Tornado in LAWRENCE, ALABAMA
From 26-OCT-10 12:23:00 to 26-OCT-10 12:24:00 (CST-6)
Location: HILLSBORO
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-1 tornado with winds up to 95 mph touched down briefly along Highway 20 near County Road 217 in Hillsboro.  The tornado uprooted several trees and snapped several hardwood trees.  The tornado lifted west of County Road 400.

Thunderstorm Wind in MADISON, ALABAMA
From 26-OCT-10 13:50:00 to 26-OCT-10 14:00:00 (CST-6)
Location: FARLEY
Magnitude: 61.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and powerlines were blown down near the intersection of Green Cove Road and Highway 231.

Thunderstorm Wind in MARSHALL, ALABAMA
From 26-OCT-10 16:27:00 to 26-OCT-10 16:35:00 (CST-6)
Location: LAKEVIEW
Magnitude: 61.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and powerlines were blown down in many locations in the central portion of Guntersville.  These locations included:  along Gunter Avenue near the intersection of Highway 79/431, in front of the Guntersville Museum on Rayburn Avenue, the corner of Rayburn and Loveless Street, and on Greenwood Street just off of Gunter Avenue.  Additionally, other damage including an metal awning being ripped off of the RSVP building near May Street.

Lightning in MARSHALL, ALABAMA
From 26-OCT-10 16:46:00 to 26-OCT-10 16:46:00 (CST-6)
Location: LAKEVIEW
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A woman was struck by lightning. Thankfully injuries were minor enough that she declined medical treatment.  Time estimated based on radar.

Thunderstorm Wind in LIMESTONE, ALABAMA
From 26-OCT-10 14:58:00 to 26-OCT-10 15:08:00 (CST-6)
Location: GREENBRIER
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A roof was torn off a  barn just north of Madison Blvd. on County Line Road.