Monday, September 5, 2011
September 5, 2011: Katia and Lee
As of this morning, Katia is expected to recurve away from the U.S. East Coat and accelerate toward the northeast, later in the week. The post-tropical remnants of Lee are predicted to move slowly northward along the Eastern Seaboard through the week. The remnants will approach the Mid Atlantic, advancing along a stalled cold front. The combination of this front, plume of tropical moisture, ascent of moist air along the Appalachians, and slow movement of ex-Lee promises excessively heavy rainfall across the Southeast, and potentially over portions of the Mid Atlantic.
Here is the morning surface map, showing the front, with ex-Lee embedded in the front over the Gulf Coast: