On February 28th, 2007 a large and destructive tornado moved through
Experts from the National Weather Service office in
Photos below show the impressive size of this tornado, estimated between one quarter and one half mile in diameter. They were pulled from the video of an off duty National Weather Service employee who was out spotting this storm. Since the tornado occurred after dark, it was only visible when illuminated by intermittent lightning flashes. This is why it is so extremely important that folks take immediate action when a tornado warning is issued. If you wait to see or hear it, it may be too late!
|Photo Credits: Andy Fischer, Aviation Weather Center. Images may not be used without expressed written permission.
Radar imagery shown below shows the supercell and its rotational signature (center of both images) at about the same time as the above tornado images. These images clearly show a “hook” structure in the reflectivity field and a strong and tight rotational signature in the velocity field. These are a few of the features meteorologists look for when assessing a storm’s potential to produce tornadoes.
Click on Images for Larger Version
This tornado is a historic event for a couple of reasons. First, it is the first time anywhere in the country that a tornado has been rated as high as EF4 since switching to the new Enhanced Fujita scale on February 1st 2007.
Second, while tornadoes reaching EF4 intensity are rare events in their own right, there has never been a tornado of this magnitude occurring in
Please see www.spc.noaa.gov/faq/tornado/ef-scale.html for more information on the Enhanced Fujita Scale.
Please see http://www.nws.noaa.gov/om/brochures/tornado.shtml for more information on tornadoes, including important safety tips.