Sustained winds are considered “damaging” when they reach 50 knots, or 58 m.p.h., and can start to break tree limbs and tear off roof shingles. More widespread damage occurs as winds reach and exceed hurricane force, which is 74 m.p.h.

A new hurricane forecast is lowering expectations for overall activity in the Atlantic as the peak of the season approaches, but forecasters warn that the threat to the U.S. is far from over. AccuWeather now expects eight to 11 named storms, three to four ...