A flood watch means there is a potential for flooding based on current forecasts. A flood warning means flooding is imminent.
Flood warnings were issued for communities close to the Potomac River in Loudoun County, Frederick County and Montgomery County, and the Rappahannock River in Fauquier County.
The Potomac River near Point of Rocks, Edwards Ferry and Little Falls could reach flood stages sometime on Monday.
Montgomery County reported that White’s Ferry in Poolesville, Maryland is now closed due to flood concerns.
Most of the D.C. area were under a flood warning overnight.
The WTOP Traffic Center received reports of standing water on certain stretches of the Capital Beltway and advises people to drive carefully, with wipers and headlights on for better visibility. A downed tree limb is blocking the right lane of the inner loop close to the Annapolis Road interchange.
On the outer loop of the beltway, near the intersection with the Baltimore-Washington Parkway, the traffic center reported 3 feet of flooding, as well.
U.S. 50 was stopped both ways between Maryland 201 at Kenilworth Avenue and Columbia Park Road around 6:30 p.m. Flooding caused all lanes to be blocked for several hours.
Meteorologist Matt Ritter said rain, heavy at times, should continue through Sunday but intensity will lessen heading into Sunday evening. Temperatures should remain steady in the low 60s.
Ritter forecasts nicer weather for Monday, with clearer skies later in the day. High temperatures will range from the upper 70s into the low 80s. Wednesday may be the most pleasant day of the next three.
The National Weather Service said rainfall amounts of one-half inch to 1.5 inches of ran can be expected through 6 a.m. Monday, though the rainfall is not expected to be intense.