A batch of heavy rain and thunderstorms will bring the risk of urban and flash flooding, as well as travel delays into Tuesday night along much of the Atlantic Seaboard.
The downpours can be heavy enough to not only bring street and catch basin flooding, but may also greatly lower the visibility.
Poor visibility and locally severe thunderstorms in the heavily-concentrated airport zone of the Atlantic Seaboard could lead to widespread flight delays within the region and possibly ripple-effect implications elsewhere in the nation.
The storm system dumped up to 6 inches of rain and has a history of flash flooding in Tennessee to start the week.
Cities that will be impacted by the heavy rain and related issues into Tuesday night include Raleigh, N.C.; Richmond, Va.; Hagerstown, Md.; Philadelphia and Harrisburg, Pa., Washington, D.C.; Baltimore; Wilmington, Del.; New York City and Albany, N.Y.; Hartford, Conn., and Boston.
Enough rain can fall at a fast enough pace to cause rapid rises on small streams in hilly terrain areas anywhere along the Atlantic Seaboard.
The system is forecast to bring a general 1.00 to 2.00 inches of rain with the potential for 4.00 inches or more in a few locations. Much of the rainfall will occur over an 8- to 12-hour period. A few locations along the East Coast can receive an inch of rain in an hour's time.
A system responsible for heavy rain in the South Central states over the weekend will join forces with a front approaching from the Upper Midwest and moisture from the Gulf of Mexico and the Atlantic Ocean.
During the second half of the week, high pressure will return to the region with sunshine.
**However, locally dense morning and midday fog could become a travel problem Thursday and Friday, after cool winds subside.**
This story was originally published at 10:00 a.m. EDT, Monday, Sept 18, 2012 and has been updated.
Typhoon Kalmaegi is taking aim on southern China and northern Vietnam with life-threatening flooding and damaging winds
A raging wildfire, which erupted Monday afternoon, has damaged or destroyed at least 100 structures and has forced the evacuation of hundreds of residents in Northern California, near Weed.
Tropical moisture from the approaching Odile will deliver another round of heavy rain and flooding downpours to the interior Southwest by the middle of this week.
The remnants of Odile have the potential to bring heavy rain and flooding to parts of the Plains and Midwest late this week after hitting the Southwest.
Edouard has become the fourth hurricane of the 2014 Atlantic season and additional strengthening is possible.
At 6:00 p.m. EDT, Hurricane Hugo was located approximately 400 miles east-southeast of San Juan, P.R. With maximum sustained winds of 140 mph, Hugo was moving west-northwest at 12 mph.
Eastern US (1999)
Hurricane Floyd moves up east Coast. Storm surge at Wilmington, NC measured 10.3 feet. Winds gusted to 80 mph at Atlantic Beach, NC 14" of rain fell over a 2 day period in Chestertown, MD. 6.98" fell over a 2 day period in Philadelphia, PA.
Upper Plains (1881)
General snowfall across NW Iowa and southern Minnesota. A total of 6 inches in Stuart, IA.