An ongoing thunderstorm has taken out power for hundreds of Fairfax County residents, as the threat of flash flooding looms.

The National Weather Service has issued a Flash Flood Warning for the D.C. region that is set to remain in effect until 8 p.m.

According to the alert, between 1.5 and 2.5 inches of rain have fallen so far, and an additional 1 to 2 inches are possible. Areas of concern include Reston, Centreville, Annandale, Vienna, Falls Church, McLean, Great Falls, Chantilly, and Fairfax Station.

[8/10 at 5:03 PM] A Flash Flood Warning has been issued until 8 PM as thunderstorms producing heavy rain move through the region. Do NOT attempt to cross a flooded roadway. Turn around don't drown! #VaWx #TADD #FloodSafety pic.twitter.com/4Ks5QYlOFx

— Ready Fairfax (@ReadyFairfax) August 10, 2022

More than a thousand Dominion Energy customers have been affected by power outages since rain arrived in the area this afternoon, according to the utility company’s outage map.

The largest impact appears to be in Pimmit Hills, where 647 customers are without power. An outage affecting 328 people near Eagle View Elementary School in the Fairfax area is expected to be addressed between 6 and 11 p.m.

In the Herndon area, an outage at the Herndon Parkway and Sterling Road intersection has affected 221 customers. Dominion estimates that power will be restored there between 7 p.m. and midnight.

Herndon Parkway has been closed in both directions at Palmer Drive after an accident, according to the Town of Herndon Police Department. Power lines are down there.

TRAFFIC ALERT: Herndon Parkway closed in both directions at Palmer Dr due to an accident. Power lines are down. Please find an alternate route. Updates as available. #HerndonPD pic.twitter.com/bMWs8TLR3J

— Herndon Police (@HerndonPolice) August 10, 2022

The full Flash Flood Warning from the NWS is below: Read More

After a stormy night, more rain is on the way this afternoon (Friday), prompting the National Weather Service to issue a Flood Watch for Fairfax County and the rest of the D.C. region.

The alert will take effect at 3 p.m. and is currently set to continue until 11 p.m.

“Flash flooding caused by excessive rainfall is possible,” the alert says, projecting possible, localized rainfall totals of 2 to 4 inches.

[8/5 at 11:18 AM] A Flood Watch has been issued from 3 PM – 11 PM as heavy rain producing storms are expected. Since our grounds are saturated, more rain could quickly lead to flooding. Stay weather aware and if you encounter flooded roads, "Turn Around, Don't Drown." #VaWx pic.twitter.com/vvoQjAXRlm

— Ready Fairfax (@ReadyFairfax) August 5, 2022

The full alert from the NWS is below:

…FLOOD WATCH IN EFFECT FROM 3 PM EDT THIS AFTERNOON THROUGH THIS
EVENING…

* WHAT…Flash flooding caused by excessive rainfall is possible.

* WHERE…DC and portions of Maryland and Virginia, including the following areas: the District of Columbia. In Maryland, Anne Arundel, Calvert, Carroll, Central and Southeast Howard, Central
and Southeast Montgomery, Charles, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore and St. Marys. In Virginia, Albemarle, Arlington/Falls Church/Alexandria, Culpeper, Eastern Loudoun, Fairfax, Greene, King George, Madison, Nelson, Northern Fauquier, Orange, Prince William/Manassas/Manassas Park, Rappahannock, Southern Fauquier, Spotsylvania, Stafford and Western Loudoun.

* WHEN…From 3 PM EDT this afternoon through this evening.

* IMPACTS…Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.

* ADDITIONAL DETAILS…
– Showers and thunderstorms will develop this afternoon and may last into the evening. Any thunderstorms will be capable of producing very heavy rainfall, with localized totals of two to four inches possible. Much of the rain may fall within a one to three hour period, making rapid rises in creeks and streams possible, as well as flash flooding in urban areas.

Fairfax County and areas nearby are under a Severe Thunderstorm Watch this evening.

The National Weather Service issued a Flood Watch earlier today (Monday), cautioning flooding may occur this evening, and a Severe Thunderstorm Watch is in effect until 10 p.m.

“Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations,” the Flood Watch reads. “Afternoon to evening showers and thunderstorms may produce very heavy rainfall capable of flash flooding. This could include multiple rounds of storms which would enhance the flood risk. Rainfall rates may reach 1 to 2 inches per hour, locally higher in spots. The D.C. and Baltimore metros will be the most susceptible given recent heavy rainfall the past couple of weeks.”

The National Weather Service advises residents to monitor forecasts and be prepared in case of flash floods.

Remember: when thunder roars, go indoors! #FCFRD #weather RT @ReadyFairfax: [1:48 PM] Severe Thunderstorm Watch has been issued until 10 PM this evening. pic.twitter.com/CpSsxhjLaB

— Fairfax County Fire/Rescue (@ffxfirerescue) July 18, 2022

Fairfax County is under a Severe Thunderstorm Watch and Flood Watch as storms are expected in the region this evening.

The National Weather Service issued the watches this afternoon. They both expire at 10 p.m.

Rainfall could cause flash flooding in the area, according to the Flood Watch.

“Strong to severe thunderstorms will move across the region late this afternoon through the evening hours,” the Flood Watch says. “Heavy rain will accompany a number of these storms which may drop 1 to 2 inches of rainfall in an hour.”

A Hazardous Weather Outlook for the area also says the primary threats are wind gusts and large hail, with the possibility of an isolated tornado.

A Severe Thunderstorm Watch has been issued for the entire area through 10PM tonight. Thunderstorms today are capable of producing damaging winds and large hail. An isolated tornado can't be ruled out. A Flood Watch also remains in effect. For the latest: https://t.co/Kt74D8dUsR pic.twitter.com/BS0g6IFvIy

— NWS Baltimore-Washington (@NWS_BaltWash) July 12, 2022

Per @NWS_BaltWash the potential for severe weather this afternoon & evening has increased. Possible hazards continue to be damaging winds, large hail, isolated flooding along w/ an isolated tornado. Continue to monitor the weather, especially if you have outdoor plans. #VaWx pic.twitter.com/R7lLMCxrmP

— Ready Fairfax (@ReadyFairfax) July 12, 2022

[7/12/22 at 8:34 AM] A Flood Watch is in effect from 4 PM to midnight tonight. Strong to severe thunderstorms will move across the region late this afternoon and evening. Heavy rain will accompany a number of these storms which may drop 1-2 inches of rainfall in an hour. #VaWx⛈️ pic.twitter.com/9slmdaUdTa

— Ready Fairfax (@ReadyFairfax) July 12, 2022

The full Flood Watch is below.

Event: Flood Watch
Alert:
…FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT…

* WHAT…Flash flooding caused by excessive rainfall continues to be possible.

* WHERE…Portions of DC, Maryland and northern Virginia, including the following areas: in DC, District of Columbia. In Maryland, Anne Arundel, Calvert, Central and Southeast Howard, Central and Southeast Montgomery, Charles, Northern Baltimore, Northwest Howard, Northwest Montgomery, Prince Georges, Southern Baltimore and St. Marys. In northern Virginia, Arlington/Falls Church/Alexandria, Fairfax, King George, Prince William/Manassas/Manassas Park and Stafford.

* WHEN…Until Midnight EDT tonight.

* IMPACTS…Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks.

* ADDITIONAL DETAILS…
– Strong to severe thunderstorms will move across the region late this afternoon through the evening hours. Heavy rain will accompany a number of these storms which may drop 1 to 2
inches of rainfall in an hour. Additionally, some regions could see repeat thunderstorm activity leading to an enhanced threat for flooding.
– http://www.weather.gov/safety/flood
Instructions: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Fairfax County is under a Flood Watch until midnight.

The National Weather Service issued the watch this morning, noting flash flooding caused by excessive rainfall is possible after 3 p.m.

Showers and thunderstorms are expected later this afternoon into the evening, according to the National Weather Service. There will be heavy rainfall at times, with predicted rainfall amounts of 1 to 3 inches within the span of a couple of hours, according to the Flood Watch.

A Hazardous Weather Outlook in the county states damaging winds and hail are also possible.

Showers and thunderstorms are likely, mainly between 3 PM and 11
PM. A Flash Flood Watch for potential flash flooding is in effect
near and west of Interstate 95 during this time. Isolated
instances of flooding can`t be ruled out further east.

In addition, a few storms may become severe with damaging wind
gusts and large hail. An isolated tornado can`t be ruled out.

The #Flood Watch for potential flash flooding this afternoon and evening has been expanded eastward into the I-95 corridor. Heavy #rain from thunderstorms may lead to rapid rises of water in creeks, streams, and in poor drainage areas. pic.twitter.com/MtfzQDadcQ

— NWS Baltimore-Washington (@NWS_BaltWash) June 22, 2022

[6/22/22 at 1:30 PM] A Flood Watch is in effect this afternoon until 11 PM. Heavy rain from thunderstorms may lead to rapid rises of water in creeks, streams, and in poor drainage areas. Please stay weather aware. #VaWx pic.twitter.com/oSgtmhUVd0

— Ready Fairfax (@ReadyFairfax) June 22, 2022

The rain now passing through Fairfax County could lead to flash flooding this afternoon and evening (Thursday).

The National Weather Service has issued a Flood Watch for much of the D.C. area that’s currently set to be in effect until 8 p.m.

Here is more from the alert:

* IMPACTS…Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS…
– A strong surface trough has settled over the I 95 corridor and has become the focus for the formation of strong thunderstorms. PWs greater than 1.7 inches combined with the potential for training storms capable of producing 2 to 3 inches per hour may lead to an increased threat for flash flooding over the more urban areas along the I-95 corridor. One to two inches of rain are likely within training storms with locally higher amounts around 4 inches are possible.

The region is also under a Severe Thunderstorm Watch until 9 p.m.

(6/2, 3:15 pm) Flood watch until 8 p.m. Excessive runoff may result in flooding of rivers, creeks, streams and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. https://t.co/wOu4Q7J8hx pic.twitter.com/6d9aEhu66B

— Fairfax County Government 🇺🇸 🏳️‍🌈 (@fairfaxcounty) June 2, 2022

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.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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