Juan moved northward into Canada, but spawned another system that spread moderate rainfall across the Mid-Atlantic States, wetting soils.

On November 3, a low pressure area developed south of Florida and moved northeastward along a cold front, bringing a plume of moisture influenced by Juan's previous track.

There was also tidal flooding in the state along the Chesapeake Bay from the storm, which washed away beaches just weeks after Hurricane Gloria affected the coastline.

During the storm, a power company opened the flood gates of the Lake Lynn dam along the river to preserve its integrity, triggering a class action lawsuit that ultimately failed.

Early on October 26, a tropical depression formed in the central Gulf of Mexico, and intensified into Hurricane Juan while meandering northward.

[1][4] This low continued to the east through North Carolina, bringing moderate rainfall throughout the region,[5] and saturating soils; overcast skies and the weak sunlight of early November prevented much of the rains from evaporating.

[6] On November 3, while the low was located over North Carolina, a stationary cold front extended from the Gulf of Mexico through Michigan, which absorbed the remnants of Juan.

That day, a low pressure area developed in the Gulf of Mexico south of the Florida panhandle and tracked to the northeast along the front, bringing a plume of warm tropical air into the east-central United States;[6] the previously erratic motion of Hurricane Juan allowed this flow of moisture to extend into the mid-Atlantic.

The Roanoke, Virginia NWS office lost telephone service shortly before the arrival of the flooding, which created difficulties in distributing warning information.

[6] In Virginia and Maryland along the western coast of the Chesapeake Bay, several low-lying and small coastal communities were evacuated.

[8] The system dropped rainfall from North Carolina to Pennsylvania, westward to Ohio,[7] with a peak of 19.77 in (502 mm) just northeast of Montebello, Virginia.

[1] While moving through the southeastern United States, the storm produced gale-force winds along the Outer Banks, and there were reports of two weak tornadoes that damaged boats.

Rainfall reached 12 in (300 mm) in eastern North Carolina, which flooded coastal cities in combination with high tides.

Flooding reached a depth of 2 ft (0.61 m) in some places, which damaged roads and affected a trailer park in Hertford County.

Overall, the storm system caused 22 deaths and $753 million, greater than the devastating hurricanes Camille and Agnes,[5] and making it the costliest flood in the state's history.

[1] In Elkton within the county, an 89‑year‑old railroad bridge was washed out, although nearby Bridgewater had less flooding due to a levee built in 1949; the town sustained minor damage to roads and the hydroelectric plant.

In nearby Highland County along the border with West Virginia, the floods damaged 350 homes or barns, and deteriorated $2 million worth of roads.

Staunton, a city independent from Augusta County, experienced minimal effects, although the water treatment plant was damaged and a hotel basement was flooded.

[13] In Buena Vista alone, the Maury River left $50 million in damage,[12] after 3 to 6 ft (0.91 to 1.83 m) of water entered homes and businesses.

[1][12] There, the river swept up entire houses, causing portions of U.S. Route 29 to close,[12] and ruining about $8 million worth of tobacco.

After the flooding, Mystic Cave in Pendleton County had tree branches wedged into the ceiling and a layer of sand on the floor.

Levels along the Potomac in Washington were the third highest on record and so severely damaged the Georgetown Branch that the C&O Railroad began abandonment of it.

[26] The floods left $9 million worth of damage to the Chesapeake and Ohio Canal between Georgetown and Cumberland, Maryland,[5] which was closed for the first time in its 157-year history.

Along the Atlantic coast, high waves washed away 400,000 cu yd (310,000 m3) of beaches in Ocean City, just months after Hurricane Gloria eroded twice that amount of sand.

[7] High rainfall also flooded streams in southwestern Pennsylvania, estimated as 50 year events,[7] and primarily along the Monongahela River.

[7] There were many evacuation orders after a false report that the Lake Lynn dam had burst, which is located along the Cheat River several miles south of Point Marion in extreme northern West Virginia.

[17] FEMA opened 20 disaster centers across the state to coordinate residents' requests for federal aid, and used 290 full or part-time employees.

[27] The jury found that although the West Penn Power was negligent,[27] the damage was caused mainly by the historic and unprecedented flooding; consequently, the case entered a compulsory nonsuit, meaning the company was not required to pay compensation.

The floods caused by Hurricane Agnes in 1972 prompted a study that would channelize 10 mi (16 km) of the Roanoke River to increase water capacity.

[35] In Pennsylvania, then-governor Dick Thornburgh allocated $1 million in emergency aid for the disaster areas, and activated 600 National Guardsmen to help with clean up.