One look at the map this morning and what jumps out is that central Maryland and metro Baltimore are NOT dealing with the worst weather today, contrary to most of this summer. Air Quality Alerts due to the stagnant air surround from southern Pennsylvania to the Delmarva. An Excessive Heat Warning is in effect for metro Phildelphia and Wilmington. But while the buzz has been about a heat wave, Baltimore only reached 91F Tuesday. Expect more of the same today, with only scattered showers. These will develop mid afternoon and track from southwest to northeast. Tomorrow, a cold front will arrive with storms from the northwest to southeast. That will be more of an impact on our area. See the radar simulations below.