cold air funnel
formed when a cold-core closed midlevel low moved into the Ohio Valley.
These phenomena are not totally understood by meteorologists, but
usually occur when showers develop in the vicinity of an upper low and
very cold air aloft.
Cold air funnel clouds almost never touch down, but on rare occasions
they do. This particular funnel cloud was one of those rare
instances and caused minor damage in northern Auglaize County (see photo
Note that the National Weather Service will usually not issue a tornado
warning for a cold air funnel. This is partly due to the fact that
they rarely touch down and are nearly impossible to detect on radar (see
link to radar image below). However if cold air funnels are
happening or expected, a special weather statement may be issued.
Safety Note: Even though cold
air funnels rarely touch down, this case shows that a touchdown is still
possible. These situations will produce winds similar to a weak
tornado. If a cold air funnel is spotted, take the same
precautions you would for any funnel cloud or tornado. Take
shelter in a sturdy building away from windows.