On this first full day of autumn, summer makes a comeback. Southwest winds will also bring in the more humid air – and keep it around through the remainder of the week. We’re in this mini warmup for a day as a cold front approaches from the west. This would be a prime setup for severe weather, but we aren’t in midsummer, and the instability is marginal this time around. Some southeast facing beaches will see some occasionally big waves, so beware if you’re taking a stroll on the sand.