Flood Warning For The Monocacy River Near Frederick

..Observed flooding changed from Minor to Moderate severity and
increased in duration for the following rivers in Maryland...

  Monocacy River near Frederick affecting Frederick County.

For the Monocacy River...including Frederick...Moderate flooding is


Motorists should not attempt to drive around barricades or drive
cars through flooded areas.

Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.

Additional information is available at www.weather.gov/washington or

The next statement will be issued Friday morning at 945 AM EDT.


946 PM EDT Thu Sep 23 2021

...Observed flooding increased from Minor to Moderate severity and
increased in duration until late tomorrow morning...

The Flood Warning continues for
  the Monocacy River near Frederick.
* Until late tomorrow morning.
* At 9:16 PM EDT Thursday the stage was 17.6 feet, or 2.6 feet above
  flood stage.
* Flood stage is 15.0 feet.
* Moderate flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
  at 9:16 PM EDT Thursday was 17.6 feet.
* Forecast...The river is expected to fall below flood stage late
  tonight and continue falling to 5.0 feet Sunday evening.
* Impact...At 17.0 feet, Significant lowland flooding is occurring
  along the river, with backwater flooding also occurring. Numerous
  roads are closed. Water is approaching the parking lot at Gambrill
  Mill on the Monocacy National Battlefield. Backwater flooding from
  Carroll Creek is likely approaching the underside of the bridge
  leading to the Frederick city wastewater treatment plant.
* Flood History...This crest compares to a previous crest of 17.5
  feet on 04/21/1940.

By The National Weather Service, Sterling, Va.