After wreaking havoc in Florida, a strong storm system is producing widespread flooding, gusty winds and the possibility of tornadoes as it makes its way up the Atlantic coast.

Excessive downpours will remain a threat until Monday morning for most parts of the Mid-Atlantic and until Tuesday for New England. The storm will continue to move north and enter eastern Canada on Monday night.

In North Carolina and eastern South Carolina, thunderstorms could possibly include "frequent lightning, severe thunderstorm wind gusts, few tornadoes, and a minimal threat of hail," the NWS said Sunday in its advisory.

The NWS office in Wilmington, N.C., reported some flooding in southern North Carolina and along the South Carolina coast. It advised that widespread rainfall of 2 to 3 inches was possible and some areas could get 4 to 6 inches.

A flood warning will be in effect near the Sante Fe River in northern Florida from Monday night to Wednesday night. NWS warned that flooding may affect roads in Columbia county in north central Florida.

On Saturday, the storm dumped up to three inches of rain in the greater Tampa Bay region, NPR member station WUSF reported. Meanwhile, more than 11,000 households were without power across the state on Sunday afternoon, according to PowerOutage.US.

Brendan Schaper, a National Weather Service meteorologist in Melbourne, Fla., said Saturday's showers broke the daily rainfall records in all seven of central Florida's tracking sessions. At Orlando International Airport, 2.33 inches of rainfall accumulated, more than double the record in 1912 of 1.08 inches. Meanwhile, in Leesburg, Saturday's rainfall broke a record for the entire month of December, Schaper added.

The severe weather also once again postponed undocking from the International Space Station of SpaceX's Dragon, which is packed with over 3,500 pounds of "science and hardware" and awaiting to be analyzed back on Earth.

The cargo ship was originally scheduled to leave on Thursday but its departure was repeatedly delayed this past week due to the harsh weather conditions off the coast of Florida where it will splash down.

The spacecraft is expected to undock on Tuesday "no earlier than 5:05 p.m. EST," NASA announced.