June 10, 2009

Wall Cloud in Richardson / Plano, Texas on the leading edge of a Derecho Wind Storm System

by Sam Barricklow

Click on any image for a larger view.


Looking west from Telecom Parkway and Highway 190 as a power flash (behind the tree) illuminates rain and dust in front of the wall cloud. This feature was located on the "nose" of the large scale bow echo (on radar) that is also called a Derecho (large scale wind storm).
Another view of the wall cloud.
As the wall cloud approached, a wet rear flank downdraft (RFD) developed (left of the wall cloud). Winds increased from the south to 50+ MPH, raising my concerns that a tornado might form. Shortly after this photo was shot, the RFD arrived with winds from the west-southwest at 50+ MPH, breaking limbs and blowing over trees across eastern Richardson, Plano, Murphy, Wylie and points north and east.




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Last revised: June 21, 2009