April 25-28, 2011 Tornado Outbreak Information
 
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On 27 April 2011, a super tornado outbreak occurred over the U.S. Mid and Deep South.   Although the
majority of NWS Mobile, AL County Warning Area was spared, northern Choctaw County, AL certainly
was not. Figure 1 depicts an overall view of supercell rotation tracks (courtesy National Severe Storms
Laboratory) throughout the general region on that day. Figure 2 depicts the supercell rotation track 
over extreme northern Choctaw County, AL, arriving from Clarke County, MS, just to the west. Along
this track, an approximate 1000 yard wide EF-3 tornado developed at times. Figure 3 shows a graphical
summary of the supercell rotation track (see times along pins), the surveyed damage locations (colored 
triangles)  and select screen shots of the supercell’s reflectivity and velocity patterns around 10,000 
feet above ground level between 710 PM and 747 PM CDT. The tornado’s track appears to be continuous
along an approximate 27 mile track and tracked along but mainly north of County Road 32 based on
a storm survey. See the Public Information Statement below.

 

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
948 PM CDT THU APR 28 2011

...NWS DAMAGE SURVEY TEAM FINDS EF-3 TORNADO TRACK ACROSS NORTHERN CHOCTAW COUNTY ALABAMA...

EVENT OCCURRED THE EVENING OF APRIL 27, 2011

* EVENT LOCATION: FROM 4 MI SW OF YANTLEY, AL TO NEAR OAKCHIA, AL
* STORM CLASSIFICATION: EF-3 INTENSITY TORNADO (MAX WINDS: 150 MPH)
* BEGINNING LAT/LON: 32.216N / -88.432W
* ENDING LAT/LON: 32.308N / -87.978W
* PATH LENGTH: 27.3 MILES
* MAXIMUM WIDTH: 1000 YARDS
* NOTES: THE NATIONAL WEATHER SERVICE SURVEY TEAM FOUND EVIDENCE
THAT THE TORNADO WAS ALREADY ON THE GROUND AS IT MOVED OUT OF
EXTREME NORTHEASTERN CLARKE COUNTY MISSISSIPPI INTO NORTHERN CHOCTAW
COUNTY APPROXIMATELY 4 MILES TO THE SOUTHWEST OF THE COMMUNITY OF
YANTLEY. THE TORNADO THEN REMAINED ON THE GROUND AS IT MOVED EAST
ACROSS THE ENTIRE WIDTH OF EXTREME NORTHERN CHOCTAW COUNTY...BEFORE
EXITING THE COUNTY BY CROSSING THE TOMBIGBEE RIVER NEAR THE
COMMUNITY OF OAKCHIA. THE TORNADO NEARLY PARALLELED COUNTY ROAD 32
AS IT MOVED EAST ACROSS THE COUNTY...PRODUCING EF-2 AND SPORADIC
EF-3 DAMAGE ALONG IT`S PATH. CONSIDERABLE TREE DAMAGE WAS NOTED
ALONG THE ENTIRE PATH...WITH MANY TREES SNAPPED OFF ABOVE GROUND
LEVEL AND SOME TREES COMPLETELY UP ROOTED. EXTENSIVE DAMAGE TO HOMES
AND OTHER STRUCTURES WAS ALSO NOTED...WITH EF-3 DAMAGE TO ONE HOME
THAT HAD IT`S ROOF TAKEN OFF AND EXTERIOR WALLS COLLAPSED. SEVERAL
MOBILE HOMES ALONG THE PATH OF THE TORNADO WERE ALSO COMPLETELY
DESTROYED.

&&

SHEPHERD/GARMON/CACERES 



Figure 1

Figure 1 

Figure 2
Figure 2

Figure 3
Figure 3




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