Today brings a sharp cool-down across Delmarva in the wake of a strong cold front, with temperatures falling through the 50s this afternoon and north winds gusting up to 35 mph. After a chilly night, mainly sunny but cool weather follows Tuesday before a midweek warm-up sends highs back into the 70s by Thursday. Another front arrives Friday with a chance for showers and a rumble of thunder, followed by a cooler but dry and sunny weekend.