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.
Several Coastal Flood Warnings have been issued along the Chesapeake Bay and Tidal Potomac River. Water levels are already on the rise and will only rise more throughout the day today and into Friday. Tidal inundation levels of 2-4 feet are expected in low-lying coastal areas. pic.twitter.com/dObvOQdto8
— NWS Baltimore-Washington (@NWS_BaltWash) October 28, 2021
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.
[10/28 at 8:35 AM] A Coastal Flood Warning will be in effect at 6 PM this evening to 8 AM Saturday.
🌊2-4 feet of inundation above ground level possible in low lying areas
🚧Numerous roads may be closed
⬆️Flooding will be the worst around high tide#TurnAroundDontDrown #VaWx pic.twitter.com/LDW8LfA8pw
— Ready Fairfax (@ReadyFairfax) October 28, 2021
The National Weather Service has issued a Flash Flood Watch for much of the D.C. area, including Fairfax County.
In effect until 2 a.m. tomorrow (Tuesday), the alert says showers and thunderstorms could bring up to 4 inches of rain in some areas, potentially leading to rapidly rising stream and creek waters.
The full alert is below:
…FLASH FLOOD WATCH IN EFFECT UNTIL 2 AM EDT TUESDAY…
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Watch 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 and Fairfax.
* Until 2 AM EDT Tuesday.
* Showers and thunderstorms are expected to produce 1 to 2 inches of rain through this evening, with localized amounts of up to 4 inches possible. Heavy rain in a short amount of time may result in rapid rises of water on small creeks and streams and in urban areas.
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
A Severe Thunderstorm Warning is also in effect for Reston and Herndon until 6:30 p.m., with the NWS warning of 60 mile-per-hour wind gusts that could produce power outages and downed trees.
“At 544 PM EDT, severe thunderstorms were located along a line extending from South Riding to Herndon to Wolf Trap, moving northeast at 50 mph,” the agency said.
With the potential for multiple rounds of showers & thunderstorms into the overnight, a Flash Flood Watch has been issued for the DC metro into parts of northeast MD through 2 AM Tuesday. Flash flooding is possible in small streams and urban areas. Latest: https://t.co/5RyZgoXicj pic.twitter.com/qfUSunieBQ
— NWS Baltimore-Washington (@NWS_BaltWash) October 25, 2021
Updated at 3:30 p.m. — The National Weather Service has now issued an Areal Flood Warning until 9:30 p.m. for central Fairfax County, with Reston, Vienna, Falls Church, Annandale, and Springfield among the locations that could experience flooding. Between 1 and 1.5 inches of rain have already fallen with an additional 1 to 2 inches possible.
Earlier: After a couple of relatively dry weeks, the weather in Fairfax County is about to take a turn for the rainy today (Thursday).
The National Weather Service issued a Flash Flood Watch for the D.C. area at 2:44 p.m. Set to remain in effect until 9 p.m., the alert warns that showers and thunderstorms could produce up to two inches of rain per hour, potentially leading to floods in some areas.
Here is the full alert:
…FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING…
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Watch for portions of DC, Maryland and northern Virginia, including the following areas: in DC, District of Columbia. In Maryland, Anne Arundel, Carroll, Central and Southeast Howard, Central and Southeast Montgomery, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford and Southern Baltimore. In northern Virginia, Arlington/Falls Church/Alexandria, Eastern Loudoun, Fairfax, Prince William/Manassas/Manassas Park and Western Loudoun.
* Until 9 PM EDT this evening.
* Slow moving showers and thunderstorms will produce very heavy rainfall, potentially leading to areas of flash flooding. Rainfall rates may reach two inches per hour.
The NWS advises residents to monitor weather forecasts later in the day and prepare to take action if the watch escalates into a Flash Flood Warning.
[9/16 at 2:52 PM] A Flash Flood Watch has been issued until 9 PM tonight. Slow moving showers and thunderstorms will produce very heavy rainfall, potentially leading to flash flooding. Stay weather aware this evening and know what to do if a warning is issued. #VaWx pic.twitter.com/CoUkSmc4qC
— Ready Fairfax (@ReadyFairfax) September 16, 2021