Sussex County will start Thursday mild, turn warmer in the afternoon, then cool down Thursday night after a late-day cold front.

The eastward progression of an upper-level trough and surface front will bring active weather to an end by Thursday evening, with a transition to clearer skies and cooler temperatures overnight into early Friday morning.

A series of weak fronts and upper-level shortwaves will bring showers and thunderstorms to Delmarva tonight, overnight, and through Thursday afternoon, with high pressure building in by Friday.