The photo below shows a tornado in the vicinity of Ocean City, MD taken this afternoon. The tornado was produced by a thunderstorm cell that formed in unstable air, ahead of a strong cold front pushing across Maryland. The large, funnel-shaped appearance of the tornado cloud and broad spray ring suggests that this developed as a tornado over land and subsequently moved offshore, as opposed to a waterspout that initiated over the ocean - but the NWS is trying to substantiate this. Tornadoes - even those that move over water - tend to contain higher wind speeds than waterspouts. Tornadoes and waterspouts also form by different mechanisms.