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JUST IN: Flood Warning in effect for Fairfax County into Friday evening

The steady rain that has fallen over Fairfax County throughout the past two days could result in flooding, forecasts indicate.

Citing “excessive rain,” the National Weather Service has issued a Flood Warning for the county that’s expected to remain in place until 6:45 p.m. today (Friday).

“Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring,” the alert says. “Low-water crossings may be inundated with water and may not be passable.”

Some flooding has already been reported, with Prosperity Avenue currently closed near Mantua, Fairfax County confirmed.

Here are more details from the warning, which went out at 2:52 p.m.:

– At 246 PM EST, radar indicated heavy rain had occurred in the warned area. Broadcast media reported that flooding is already occurring. Between 1 and 1.5 inches of rain have fallen.

– Prosperity Avenue is closed near Mantua due to flooding, and other typical flood prone areas may also flood shortly.

Additional rainfall amounts up to 0.25 inches are possible in the warned area.

– Some locations that will experience flooding include…
Reston… Annandale… Springfield… Vienna… Mantua… Burke… Oakton… Tysons Corner… Wolf Trap… Great Falls… Merrifield… West Springfield… Dunn Loring… North Springfield… Ravensworth… Belleview…

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Potential for flooding high in Fairfax County into Saturday morning

Waters from the Potomac River could spill over into Fairfax County, with the D.C. area expected to get almost nonstop rain tomorrow (Friday), the National Weather Service warns.

A Coastal Flood Warning will be in place for Northern Virginia, including Fairfax County, starting at 6 p.m. today (Thursday) until 8 a.m. Saturday (Oct. 30).

According to the NWS, showers and thunderstorms from the Midwest are moving east and could bring 1 to 2 inches of rain, along with the risk of flash flooding along the Potomac River and Chesapeake Bay.

Here is more from the NWS alert:

…COASTAL FLOOD WARNING NOW IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EDT SATURDAY…

* WHAT…Two to four feet of inundation above ground level possible in low lying areas.

* WHERE…Prince William/Manassas/Manassas Park, Fairfax and Stafford Counties.

* WHEN…From 6 PM this evening to 8 AM EDT Saturday, especially around the time of high tide.

* IMPACTS…Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will occur.

The NWS has also issued a Flood Watch that will be in effect from 10 a.m. to 6 p.m. tomorrow, with rainfall potentially reaching 2 to 4 inches in some areas.

“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,” the NWS said.

The Fairfax County Office of Emergency Management says the risk of rain will likely arrive in the county around midnight to 2 a.m. Friday, echoing the Fire and Rescue Department’s warning that flooding may lead to road closures.

“Low lying property, including homes, businesses and some critical infrastructure, may be inundated,” OEM said in a blog post. “Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth.”

The office also advised keeping children away from creeks or other bodies of water that may rise rapidly, and clearing leaves and other debris from downspouts and storm drains.

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