Tropical Storm Andrea, which still had maximum sustained winds of 40 miles per hour and was located over South Carolina as of 11am, was bringing widespread tropical moisture and rainfall to much of the East Coast early this afternoon. As she continues to move north and east (and eventually become post tropical) the center of the low pressure will pass off the Mid-Atlantic coast and then over or near Cape Cod on Saturday. To the northwest of the surface low, heavy tropical rains are expected — which places our area in a high probability for a prolonged heavy rain event.
Through Tonight: Heavy rain likely, especially after 2pm. A thunderstorm is also possible. Temperatures topping out in the upper 60’s this afternoon, but only falling into the low 60’s overnight. East winds around 15 miles per hour. A washout — bring an umbrella and a rain coat if you have to head out.
Friday PM commute will be a messy one: With a few inches of rain already recorded in the area, and the heaviest rain expected to begin around the evening commute on Friday, you can expect delays (some major) on roads that do not handle the rain well. Flooding is expected on low lying roads and poor drainage roads. Drive carefully in the heavy rain as well, as visibilities will be reduced especially on highways.
Looking ahead: The forecast remains wet through Saturday morning, but some clearing is possible by Saturday afternoon as the system moves out of the area fairly rapidly. Showers and maybe a thunderstorm are still possible through Saturday evening. Sunday looks to be the winner of the weekend, with highs in the upper 70’s to low 80’s and partly cloudy skies.