This story was updated at 12:30 p.m. Sept. 8.

The National Weather Service has issued a flash-flood warning for portions of Frederick County.

A heavy band of showers moving north from western Montgomery County has dropped more than an inch of rain in the last hour, and could produce flash floods in the areas of Ballenger Creek, Frederick city, New Market, and Walkersville.

Meanwhile, 10 roads in Frederick County are closed due to flooding, according to Steve Cooper, the county’s emergency management planner.

The roads listed by area are:

Frederick, Retreat Road between Biggs Ford Road and the railroad tracks;

Keymar, Keysville Road at the Monocacy River and the Carroll County line; Keymar Road between Md. Route 194 and Good Intent Road;

New Windsor, Sam's Creek Road between Oak Orchard Road and Md. Route 31;

Rocky Ridge, Mumma Ford Road at the Carroll County line;

Taneytown, Sixes Road between Grimes Road and Sixes Bridge Road; Shoemaker Road at the Carroll County line;

Union Bridge, Simpsons Mill Road between Claybaugh Road and Good Intent Road; Claybaugh Road between Simpsons Mill Road and Good Intent Road.

Cooper said he didn’t know of any other flooding issues in the county, but said staff is monitoring the situation constantly.

“We’re just monitoring,” he said. “We’ve had reports of streams coming up, nearing their banks. We don’t have any reports of any swift water rescues that I’m aware of. … The National Weather Service is providing us with pretty constant updates. There’s nothing out of the ordinary, at least at this point.”

Additionally, at least three areas of Frederick County are on a flood watch due to the rain associated with Tropical Storm Lee.

The National Weather Service has issued a flood warning for the Potomac River near Point of Rocks through Friday morning. The county is expected to see three to four inches of rain this week.

According the National Weather Service, flood stage in the Potomac is reached at 16 feet, which may happen by Thursday afternoon. The current maximum forecasted flood stage is 18.7 feet by Friday morning.

Brunswick has closed its campground as a precautionary measure, according to city administrator Rick Weldon.

“We decided to close the campground,” Weldon said. “That’s the only real precaution we’ve taken so far. The National Weather Service radically altered the Potomac level. Yesterday they said 27 feet, which means water over the MARC parking lot. Today it’s just 18.7 feet, which means water was just coming over the top of the ramps at the campground.”

Weldon said the town has other plans in place for weather emergencies, such as evacuating its sewer plant workers, but those plans aren’t likely to be needed.

“That’s the only precaution,” he said. “If anything changes, we’ll make other plans. We’re not going to institute our contingency plan for the sewer plant, which is where we evacuate those guys and try to go in and operate remotely.”

The city of Frederick also expects flooding on several streets, including Butterfly Lane, Gas House Pike, Hamilton Avenue, Highland Street, Monroe Avenue, Pennsylvania Avenue, East Patrick Street, West Patrick Street, Rocky Spring Road, Shookstown Road and Waverly Drive.

Seamus Mooney, director of the Frederick County Department of Emergency Preparedness, said his department is aware of the potential for flooding, but said the forecasts aren’t yet clear on how much water would be flowing through the Potomac River.

“We are watching the river levels,” Mooney said. “Currently, the county is under a flash-flood watch, but we’re also looking at the Potomac [River] down near Point of Rocks, which is supposed to flood somewhere between now and Friday.”

Mooney said the projections for the flood are below major flooding levels that would send water out over Md. Route 28, which is at about 30 feet.

The city of Frederick has marked the streets that could flood with permanent yellow warning signs mounted on poles.

tlaino@gazette.net