Tysons, VA

Prepare for more rain today (Friday).

A Flash Flood Watch is in effect from noon today through late tonight, according to the National Weather Service.

Here’s more from the alert:

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED

 

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Ahead of Tropical Storm Isaias hitting the D.C. region, Fairfax County officials and forecasters are sharing resources and tips to help people prepare for the storm.

“Significant flash flooding of small streams and creeks is likely tonight into Tuesday evening as rainfall associated with Tropical Storm Isaias spreads northward,” according to Fairfax County. Forecasters predict that the storm will bring 3-6 inches of rain.

Currently, the Tysons area is under a Tropical Storm Warning, which means that tropical storm-force winds are expected somewhere within this area within the next 36 hours,” according to National Weather Service.

The area will be under a Flash Flood Watch from 11 p.m. tonight to the same time Tuesday night and a Coastal Flood Watch will also be in effect from Tuesday morning to Wednesday.

Due to flooding risks, Fairfax County officials are reminding drivers to turn around if they see water and don’t know how deep it is. The county also tweeted out contact information for the appropriate people to call if someone spots a downed tree.

NWS wants people to protect property in flood-prone areas.

The Washington Post’s Capital Weather Gang tweeted that waves of heavy rain are expected to hit the D.C. region by Tuesday morning and that commuters should allow for extra time.

Image via NWS Baltimore-Washington/Twitter

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Updated 11:55 a.m. — The National Weather Service placed Fairfax County under a Tropical Storm Warning shortly after 11 a.m. today. “A Tropical Storm Warning means tropical storm-force winds are expected somewhere within this area within the next 36 hours,” according to NWS.

Earlier: As Tropical Storm Isaias hits the East Coast, forecasters warn that the Tysons area could see flash flooding early this week.

The Tysons area will be under a Flash Flood Watch from 11 p.m. tonight to the same time Tuesday night. “Moderate coastal flooding is possible at times of high tide Tuesday as Tropical Storm Isaias makes its closest approach to the area,” the National Weather Service said.

NWS says that widespread rainfall between 3-6 inches is expected, with possibly more in certain areas.

A Coastal Flood Watch will also be in effect from Tuesday morning to Wednesday.

“Rainfall associated with Tropical Storm Isaias is expected to start spreading northward late Monday night and continue into Tuesday evening,” according to NWS.

Forecasters encourage people to protect flood-prone property as soon as possible and monitor the weather. People should not attempt to drive through water if they don’t know how deep it is.

 

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Portions of Northern Virginia including the Tysons area will be under a Flash Flood Watch starting Tuesday afternoon.

The National Weather Service said that the watch will be in effect from 3-11 p.m. Forecasters say that storms and gusty wind are expected today.

More from NWS:

A slow-moving cold front will intersect a hot and humid air mass resulting in scattered to numerous showers and thunderstorms late this afternoon and evening. Multiple rounds of thunderstorms are possible, which could result in isolated rainfall amounts of 2 to 3 inches in a short amount of time. These rainfall amounts may result in rapid rises of water on small streams and creeks, as well as in urban and poor drainage areas.

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Several roads are closed in the McLean area following a storm.

The Fairfax County Police Department shared a list of weather-related road closures around the county.

As of 6 p.m., the closures in the McLean District Station area include:

  • 1000 block of Balls Hill Road (traffic hazard, tree and wires blocking roadway)
  • 1200 block of Providence Terrace (traffic hazard, tree blocking roadway)
  • 8000 block of Georgetown Pike (traffic hazard, tree blocking roadway-right lane)
  • Leesburg Pike/Towlston Road (traffic signal, lights on flash)

Currently, a Flood Warning is in effect until 9 p.m.

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Updated at 3:35 p.m. — NWS has issued a Flash Flood Warning for the Tysons area. The warning is in effect until 6:30 p.m. 

More from NWS:

At 330 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the area. Up to two inches of rain have already fallen in portions of the area, and rainfall amounts around 2 to 3 inches are expected within one hour. Flash flooding is ongoing or expected to begin shortly.

Earlier: Tysons and surrounding areas are under a Flash Flood Watch today.

The National Weather Service issued the watch shortly after 1:30 p.m. The watch will be in effect until 11 p.m.

According to NWS, heavy rainfall of 1-3 inches is expected to fall within an hour, possibly leading to flash flooding in local areas.

The Tysons area is also under a Heat Advisory and Severe Thunderstorm Watch this afternoon and evening.

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Updated 3:10 p.m. — NWS issued a Severe Thunderstorm Warning shortly after 3 p.m. for the area. “Severe thunderstorms were located along a line extending from near Leesburg to Middleburg to near Hume, moving east at 10 mph,” according to NWS.

Earlier: A Severe Thunderstorm Watch is in effect for Fairfax County and surrounding areas today (Wednesday).

The National Weather Service issued the watch at noon. The watch will be in effect until 7 p.m.

The Tysons-area is also under a Heat Advisory until 8 p.m. Forecasters recommend that people stay out of the sun, drink lots of fluids and seek air-conditioned spaces.

File photo

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The National Weather Service wants people in Fairfax County to prepare for storms today (Monday).

The area is under a Flash Flood Watch from 3-9 p.m. and a Severe Thunderstorm Watch from now until 11 p.m.

More from NWS about the Flash Flood Watch:

Thunderstorms will develop this afternoon and continue this evening along the I-95 corridor. Some areas may experience multiple thunderstorms through this evening. Rainfall amounts of 1-2 inches are possible, with some isolated amounts over 3 inches possible. This amount of rain over urban areas may lead to instances of flash flooding, as well as a potential for creeks and streams to rise rapidly if some of the higher amounts are realized.

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The National Weather Service has issued a Severe Thunderstorm Warning for Fairfax County.

The warning went into effect at 3:30 p.m. today (Monday) and will be in effect until 4:15 p.m. NWS said a severe thunderstorm near Dulles International Airport was moving northeast at 15 miles per hour at 3:30 p.m.

NWS said that damaging winds with up to 60 mph gusts and quarter size hail could cause trees and power lines to fall.

“For your protection move to an interior room on the lowest floor of a building,” according to NWS.

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The National Weather Service has issued a Severe Thunderstorm Watch for Fairfax County and surrounding jurisdictions.

The watch went into effect right after 3 p.m. and will last until 10 p.m.

The NWS says that damaging winds along with large hail are possible tonight. People can expect showers and thunderstorms Friday afternoon and evening, with possible flooding incidents.

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