A classic wedge weather pattern is in play across the region, with an area of strong high pressure over the Chesapeake Bay reaching down the lee of the Appalachians across the Savannah River, with a strong coastal trough just off the Georgia coast. That's what it's called, and here's what it means: more low clouds, fog, some drizzle and moderate temperatures.
A new strong area of low pressure over East Texas has generated flash flooding for the Lower Mississippi Valley with a long warm front stretching back to North Florida. The whole stacked system will weaken as it heads to the Great Lakes tomorrow, but we will warm up even more as that warm front passes.
So we'll see warm air aloft, pooling low-level moisture and a chance of showers just about anytime, particularly along the coast with the cooler shelf waters. And that means fog. Heavy sea fog continues, and inland areas will develop fog after 9 p.m. tonight, becoming more dense overnight. Watch for reduced visibilities starting Thursday.