Residents of San Luis Obispo County experienced a bout of unusual weather Thursday, beginning with the sighting of a cold air funnel cloud in the morning and a hailstorm later in the day in ...

A Funnel Cloud Isn’t a Tornado Yet A funnel cloud ... of a tornado is the rear-flank downdraft (RFD), which is a cold air current wrapping around the base of the storm. This downdraft acts ...