While flash flooding is a condition that typically occurs near rivers, Ocean City can experience conditions similar to flash flooding if heavy rain coincides with high tide.
More than 1.75 inches of rain fell between 7 a.m. Sunday until 7 a.m. Monday, according to the National Weather Service.
A flood watch is in effect Thursday afternoon through Friday night for most of Maryland, with an additional rainfall of 3 inches to 5 inches expected and flash floods possible.
It's forecast to start rising again Tuesday and reach 14 feet by Saturday. "Clouds and rain shower continue for the next three days here in D.C.", he said.
Forecasters say rainfall could total up to one inch in areas of central Allegheny County, including parts of Interstate 79 and the Parkway North.