Tornadoes & Flash Flooding - May 21, 2010

May 21, 2010
Tornadoes & Flash Flooding

An area of upper level low pressure moved across the Great Lakes, with a trough extending into the Ohio Valley. The airmass had become unstable, and shear in the low levels of the atmosphere became favorable for the formation of tornadoes. In addition, thunderstorms tended to rebuild over the same areas, and rainfall was very heavy. This led to flash flooding across the region as well.

Tornado in Brown/Highland Counties

Tornado in Adams County

Rainfall