First Surveys Out from Tornadoes in Shelby County, AL on April 15th, 2011


The first surveys have been done in connection to the tornadoes in Shelby County, Alabama. Here is the latest on the surveys on this storms. 2 have been confirmed so far!

… Updated for Shelby County storm survey…

… Alabaster tornado (shelby county)…

Preliminary data…
event date: April 15, 2011
event type: EF-0 tornado
estimated peak winds (mph): 70
injuries/fatalities: none
event start location and time: 33.2380/-86.8363 at 459 PM
event end location and time: 33.2449/-86.8141 at 502 PM
damage path length (in miles): 1.36
damage width (in yards): 50

National Weather Service meteorologist surveyed the damage in
Alabaster. It has been determined that the damage was consistent
with a tornado. Winds were estimated around 70 mph. This tornado was
witnessed by several residents including police officers. A weak
tornado touched down in Alabaster just behind the evangel church on
Thompson Road. The tornado tracked northeastward and lifted near
Highway 31 at the Alabaster city Hall. The most concentrated damage
occured along 8th street SW and 6th street SW. In this location,
several trees were knocked down and several landed on homes. Much of
the tornado damage path was much weaker damage and was generally
limited to broken tree limbs. The tornado damage path was 1.36 miles
long and was 50 yards wide at its widest point.

… Wilsonville tornado (shelby county)…

Preliminary data…
event date: April 16, 2011
event type: EF-1 tornado
estimated peak winds (mph): 85-90
injuries/fatalities: none
event start location and time: 33.2477/-86.5256 at 545 PM
event end location and time: 33.2680/-86.4537 at 550 PM
damage path length (in miles): 4.25
damage width (in yards): 100

National Weather Service meteorologist surveyed the damage near
Wilsonville. It has been determined that the damage was consistent
with a tornado. 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 moving 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.
The tornado damage path was 4.25 miles long and was 100 yards wide
at its widest point.

… Event overview…

A potent storm system affected a large part of the central and
eastern United States. Significant severe weather occurred from
Thursday April 14th through Saturday April 16th. Tornadoes were
reported Kansas, Oklahoma, Texas, Louisiana, Missouri, Illinois,
Mississippi, Alabama, Georgia and the Carolinas. Additionally,
damaging straight line winds and large hail occurred.

Numerous long-lived supercells developed across central Alabama
Friday April 15th. Thousands of trees and power lines were blown
downed and there were numerous reports of structural damage.

At this time there will be one National Weather Service storm survey
team on the ground… with a second team going up in a helicopter to
survey numerous locations.

At this time… storm surveys are being planned for the following
counties:

Team one: Tuscaloosa County and Autauga County.

Team two: aerial survey… several locations across central Alabama.

Additional public information statements will be issued periodically
throughout the day… as surveys teams report back their findings.

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