PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
842 PM CDT SAT MAY 2 2009

...RESULTS OF VALLEY RANCH DAMAGE SURVEY...

BASED ON A SURVEY OF THE ON-SITE DAMAGE...RADAR IMAGERY...AND
EYEWITNESS REPORTS...THE NATIONAL WEATHER SERVICE DETERMINED THAT
A MICROBURST IMPACTED THE VALLEY RANCH AREA OF FAR NORTH IRVING.
MAXIMUM WINDS NEAR THE GROUND WERE ESTIMATED NEAR 70 MPH.

RESEARCH HAS INDICATED THAT WIND SPEEDS IN HIGH WIND EVENTS OFTEN
INCREASE CONSIDERABLY IN THE LOWEST FEW HUNDRED FEET ABOVE THE
GROUND. THEREFORE...IT IS QUITE POSSIBLE THAT WINDS GREATER THAN
70 MPH AFFECTED THE UPPER PORTIONS OF THE DAMAGED STRUCTURES.

A MICROBURST IS A SMALL...INTENSE DOWNDRAFT WHICH RESULTS IN A
LOCALIZED AREA OF STRONG THUNDERSTORM WINDS. IN EXTREME CASES...
MICROBURSTS CAN HAVE WINDS WHICH EXCEED 100 MPH.

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WOODALL