THURSDAY, SEPTEMBER 21ST: Tranquil weather is expected with another mild day in store for the region. High temperatures should push in the upper 70s to low 80s. Then all eyes move toward a coastal system forming off the southeastern U.S. coast. This feature will bring increasing chances for a drenching rain, breezy winds, hazardous seas, and tidal flooding this weekend. Temperatures may not escape the 60s on Saturday. Expect improving weather by Monday.