A strong front extending from the lower Great Lakes to the central Gulf Coast and Southern Plains will slowly move eastward off most of the East Coast by Wednesday evening. Very moist air from the Gulf of Mexico and Atlantic Ocean will combine with strong upper-level dynamics to produce showers and thunderstorms from the eastern Gulf Coast to the Mid-Atlantic expanding into parts of southern New England by Tuesday evening. The system will produce moderate to heavy rain over parts of the lower Great Lakes and northern Mid-Atlantic on Tuesday moving into the Northeast and southeastern Canada by Wednesday morning. The southern end of the front will linger over parts of the Southeast producing showers and thunderstorms along parts of the Southeast coast through Wednesday evening. This image was taken by GOES East at 1445Z on September 18, 2012.