Information from the National Weather Service on October 29th:
…FLOOD WATCH REMAINS IN EFFECT FROM 10 AM EDT THIS MORNING THROUGH THIS AFTERNOON…
The Flood Watch continues for
* Portions of DC, Maryland and northern Virginia, including the following areas: in DC, District of Columbia. In Maryland, Anne Arundel, Central and Southeast Howard, Central and Southeast Montgomery, Prince Georges and Southern Baltimore. In northern Virginia, Arlington/Falls Church/Alexandria, Fairfax and Prince William/Manassas/Manassas Park.
* From 10 AM EDT this morning through this afternoon.
* Rainfall amounts around 1 to 2 inches are most likely with isolated amounts of 2 to 4 inches possible.
* Heavy amounts of rain will cause creeks and streams to slowly rise, possibly out of their banks as well as the potential for flooding in urban areas.
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
See details here: https://forecast.weather.gov/showsigwx.php?warnzone=MDZ506&warncounty=MDC027&firewxzone=MDZ506&local_place1=Columbia%20MD&product1=Flood+Watch&lat=39.203&lon=-76.858#.YXu23RDMKqA
Here is information from NWS Baltimore-Washington on Twitter:
While major coastal/tidal flooding will be the main story with this system, Flood Watches & Wind Advisories/Warnings have also been issued in other portions of the area. Check weather.gov/washington for the latest at your location! #MDwx #VAwx #DCwx #WVwx