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Tornado Watch Issued for Arlington

Arlington County is now under a Tornado Watch in addition to the earlier Flash Flood Watch.

With the remnants of Hurricane Florence moving past the area, conditions are favorable for the development of tornadoes. Within the past half hour, a possible tornado was reported near Fredericksburg.

The Tornado Watch is in effect until 10 p.m.

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Arlington County Urges Residents to Be Prepared for Hurricane Florence

Over the past 24 hours, as Hurricane Florence has gotten closer to a predicted landfall on the Carolina coast, the risk of major impacts here in the D.C. area have decreased.

Currently, it appears that rain is the main danger. The 2-4 inches currently predicted could be enough to cause flooding locally, as the region is already waterlogged from well above average rainfall, but is a far cry from the 6-20 inches of rain predicted for large parts of southern and central Virginia.

Though it looks like we’ll be spared the brunt of the storm, Arlington’s emergency management department is urging residents to be prepared for the worst nonetheless.

The agency released the following set of hurricane preparedness tips yesterday.

As the Hurricane Florence gets closer, there is an increasing risk of direct impacts to our region. The major concerns with this storm are rainfall amounts and wind speeds. Excessive rain may cause flooding and as the ground becomes more saturated, it will be easier for winds to knock over trees and take down power lines. Be prepared for power outages. Do not report power outages to 9-1-1, unless there is a life-threatening emergency. To report trees or wires down or flooded roadways, you can contact the non-emergency number at 703-558-2222. Remember: do not travel through flooded roadways. Turn around, don’t drown.

The Arlington County Department of Public Safety Communications and Emergency Management is encouraging all residents to prepare now for Hurricane Florence. Do not wait until the day before. Here are some tips to get you and your family ready:

  • Be Informed: Stay aware of things going on by having multiple ways to get information and keep an eye on the forecast.
    • Log into your Arlington Alert account to update your information and sign up for weather and traffic alerts.
    • Follow Ready Arlington on Facebook and Twitter
  • Plan Ahead: Make an emergency plan, and discuss it with each family member.
    • Plan for possible evacuation.
      • Fill your gas tank in your car.
      • Have cash on hand. During power outages, ATMs and credit card machine will not work.
      • Use text and social media when able to get in touch with family members and plan for what to do if there is no phone service or internet.
      • Have names and phone numbers of family members, utilities, doctors/pharmacists, etc written down.
    • Prepare your home:
      • Clear gutters and downspouts of debris.
      • Trim trees and shrubbery.
      • Secure or bring inside any outdoor furniture or loose items.
      • If you have a generator remember to only run it outdoors.
      • Place a thermometer in your fridge and freezer in case of power outages. Any food that has reached 40 degrees or higher should be thrown out. If doors are kept closed, food in the fridge will be kept cold for about 4 hours, and the freezer for about 48 hours.
      • Turn off or disconnect appliances. If the power goes out, a momentary power surge can cause damage.
      • Move items in your basement off the floor in case of flooding.
      • Review your insurance policy.
  • Build a Kit: Get supplies together that you may need for your family for at least 3 days. Make sure to include the needs of pets.
    • Have food that is nonperishable that does not require power to make.
    • Ensure you have flashlights and check batteries. Do not use candles as they can be a fire hazard.
    • Keep cell phones charged. Consider an external charger.
    • Refill medication/first aid kits.
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Arlington County Under Flood Warning

Arlington County is under a Flood Warning until 12:45 a.m. Saturday.

Another round of heavy rain moving into the area could cause flooding, according to the National Weather Service.

More from NWS:

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * FLOOD WARNING FOR… SOUTHEASTERN ARLINGTON COUNTY IN NORTHERN VIRGINIA… EAST CENTRAL FAIRFAX COUNTY IN NORTHERN VIRGINIA… THE CITY OF ALEXANDRIA IN NORTHERN VIRGINIA… * UNTIL 1245 AM EDT. * AT 847 PM EDT, DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN WHICH WILL CAUSE FLOODING. UP TO THREE INCHES OF RAIN HAVE ALREADY FALLEN AND ADDITIONAL RAINFALL AMOUNTS AROUND AN INCH ARE POSSIBLE. * SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE… ARLINGTON, ALEXANDRIA, ANNANDALE, HUNTINGTON, CRYSTAL CITY, REAGAN NATIONAL AIRPORT, LINCOLNIA, LAKE BARCROFT, BALLSTON, BARCROFT, JEFFERSON MANOR AND BAILEYS CROSSROADS.

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Heat Advisory Issued for Arlington and Surrounding Area

It’s the day after Labor Day, many local pools are now closed for the season, but Mother Nature hasn’t gotten the memo.

A Heat Advisory is going into effect at noon today, with heat index values expected to climb north of 100 degrees mid-afternoon.

“Take extra precautions if you work or spend outside,” the National Weather Service said in the advisory, below. “When possible, reschedule strenuous activities to early morning or evening.”

…HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS EVENING… * HEAT INDEX VALUES…AROUND 105 DUE TO TEMPERATURES IN THE MID 90S, AND DEW POINTS IN THE MID 70S. * IMPACTS…THE HEAT AND HUMIDITY MAY CAUSE HEAT STRESS DURING OUTDOOR EXERTION OR EXTENDED EXPOSURE. PRECAUTIONARY/PREPAREDNESS ACTIONS… A HEAT ADVISORY MEANS THAT A PERIOD OF HIGH TEMPERATURES IS EXPECTED. THE COMBINATION OF HIGH TEMPERATURES AND HIGH HUMIDITY WILL CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE POSSIBLE. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY – CALL 911. &&

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Flash Flood Watch Issued for Arlington

Arlington County is currently under a Flash Flood Watch.

Though the sun is out now, forecasters warn that slow-moving thunderstorms will develop later today and could dump heavy rain on Arlington and other parts of the region.

More from the National Weather Service:

…FLASH FLOOD WATCH IN EFFECT THROUGH MIDNIGHT EDT TONIGHT… THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * FLASH FLOOD WATCH FOR THE DISTRICT OF COLUMBIA, AND PORTIONS OF CENTRAL MARYLAND AND NORTHERN VIRGINIA, INCLUDING THE FOLLOWING AREAS, 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 VIRGINIA, ARLINGTON/FALLS CHURCH/ALEXANDRIA AND FAIRFAX. * THROUGH MIDNIGHT TONIGHT. * SLOW MOVING THUNDERSTORMS CAPABLE OF PRODUCING VERY HEAVY RAIN ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING. * HIGH RAINFALL RATES MAY LEAD TO RAPID RISES OF WATER IN LOW- LYING AND POOR DRAINAGE AREAS AS WELL AS SOME SMALL STREAMS. 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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Flash Flood Watch Issued for Arlington, Region

Arlington and much of the region is under a Flash Flood Watch today.

Forecasters are warning of the possibility of “multiple rounds of torrential rainfall” that could result in flash flooding given the already-saturated ground.

More from the National Weather Service:

…FLASH FLOOD WATCH IN EFFECT THROUGH TONIGHT… THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF MARYLAND, THE DISTRICT OF COLUMBIA, AND NORTHERN VIRGINIA… MULTIPLE ROUNDS OF TORRENTIAL RAINFALL WILL BE POSSIBLE FOR TARGETED AREAS THROUGH TONIGHT. GIVEN SATURATED SOIL FROM RECENT RAINFALL, REPETITIVE HEAVY RAIN MAY RESULT IN FLASH FLOODING. * URBAN AREAS, LOCATIONS ALONG SMALL STREAMS AND CREEKS, AND POOR DRAINAGE AREAS ARE MOST VULNERABLE TO FLASH FLOODING. THE FLASH FLOOD WATCH WILL LIKELY NEED TO BE EXTENDED THROUGH FRIDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS… A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. &&

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Excessive Heat Warning Issued for Arlington

Arlington County, D.C. and other surrounding areas are now under an Excessive Heat Warning.

Heat index values are expected to exceed 110 degrees this afternoon, according to the National Weather Service, elevating the risk of heat-related illness — though the temperatures could be moderated in part by pop-up showers.

More on the Excessive Heat Warning from NWS:

…EXCESSIVE HEAT WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING… THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS ISSUED AN EXCESSIVE HEAT WARNING, WHICH IS IN EFFECT UNTIL 8 PM EDT THIS EVENING. THE HEAT ADVISORY IS NO LONGER IN EFFECT. * HEAT INDEX VALUES…AROUND 110 DEGREES DUE TO TEMPERATURES IN THE MID 90S, AND DEWPOINTS IN THE MID TO UPPER 70S. * IMPACTS…THE HEAT AND HUMIDITY MAY CAUSE HEAT STRESS DURING OUTDOOR EXERTION OR EXTENDED EXPOSURE. PRECAUTIONARY/PREPAREDNESS ACTIONS… AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HIGH TEMPERATURES WILL OCCUR. THE COMBINATION OF EXTREME TEMPERATURES AND HIGH HUMIDITY WILL CREATE A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE EXPECTED. CHECK IN ON RELATIVES AND NEIGHBORS. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY – CALL 911. &&

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Heat Advisory Issued For Sunday

The National Weather Service has issued a Heat Advisory for Arlington and the D.C. area on Sunday.

Forecasters are warning of dangerously sweltering weather and encouraging residents to stay cool and hydrated.

More from NWS:

…HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM EDT SUNDAY… THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS ISSUED A HEAT ADVISORY, WHICH IS IN EFFECT FROM NOON TO 8 PM EDT SUNDAY. * HEAT INDEX VALUES…AROUND 105 DEGREES DUE TO TEMPERATURES IN THE MID TO UPPER 90S AND AND DEWPOINTS NEAR 70. * IMPACTS…THE HEAT AND HUMIDITY MAY CAUSE HEAT STRESS DURING OUTDOOR EXERTION OR EXTENDED EXPOSURE. * ADDITIONAL INFORMATION…HEAT HEADLINES MAY NEED TO BE EXTENDED THROUGH MONDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS… A HEAT ADVISORY MEANS THAT A PERIOD OF HIGH TEMPERATURES IS EXPECTED. THE COMBINATION OF HIGH TEMPERATURES AND HIGH HUMIDITY WILL CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE POSSIBLE. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY – CALL 911. &&

An Air Quality Alert has also been issued:

…AIR QUALITY ALERT IS IN EFFECT FOR SUNDAY JULY 1 2018…

The Metropolitan Washington Council of Governments in association with Maryland Department of the Environment, Virginia Department of Environmental Quality, and District Department of Environment has issued a Code ORANGE Air Quality Alert Sunday for the DC metro area.

A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine particles… visit www.cleanairpartners.net.

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Heat Advisory Issued for Arlington, D.C. Region

Arlington County and much of the D.C. area is under a Heat Advisory today.

Forecasters warn that the sweltering temperatures outside are dangerous and outdoor activities should be avoided.

In north Arlington, the heat index was 101 degrees as of 3 p.m. Tomorrow (Tuesday) is also expected to be hot and humid, with the heat index near 100.

More from the National Weather Service.

…HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING… THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS ISSUED A HEAT ADVISORY, WHICH IS IN EFFECT UNTIL 8 PM EDT THIS EVENING. * HEAT INDEX VALUES…UP TO 105 DUE TO TEMPERATURES IN THE MIDDLE 90S AND DEWPOINTS IN THE LOWER TO MIDDLE 70S. * IMPACTS…THE HEAT AND HUMIDITY MAY CAUSE HEAT STRESS DURING OUTDOOR EXERTION OR EXTENDED EXPOSURE. PRECAUTIONARY/PREPAREDNESS ACTIONS… A HEAT ADVISORY MEANS THAT A PERIOD OF HIGH TEMPERATURES IS EXPECTED. THE COMBINATION OF HIGH TEMPERATURES AND HIGH HUMIDITY WILL CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE POSSIBLE. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY – CALL 911. &&

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Arlington Under Flash Flood Watch Starting This Afternoon

Arlington County is among the areas under a Flash Flood Watch Thursday afternoon through early Friday morning.

Forecasters say slow-moving storms may develop and drop several inches of rain in a short period of time.

More from the National Weather Service:

…FLASH FLOOD WATCH REMAINS IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT… NUMEROUS SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAINFALL ARE EXPECTED TO APPROACH THE REGION THIS AFTERNOON AND CONTINUE PAST MIDNIGHT. LOCALIZED RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE EXPECTED. * RAPID RISES OF CREEKS AND STREAMS WILL BE POSSIBLE DUE TO TORRENTIAL RAINFALL, POTENTIALLY SPILLING BEYOND THEIR BANKS. IN ADDITION, LOW POINTS ALONG ROADWAYS MAY BECOME IMPASSIBLE DUE TO ACCUMULATING RUNOFF. FLASH FLOODING MAY DEVELOP QUICKLY. 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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UPDATED: Flood Warning Issued for Arlington

Update at 5:15 p.m. — As heavy rain continues to fall, high water has been reported on a number of roads, including: along Route 50; on Route 110 below Memorial Drive; at the intersections of Lorcom Lane and Lee Highway; Old Dominion Drive and N. Thomas Street; and at the intersection of N. Quantico Street and 26th Street N.

Update at 4:45 p.m. — The National Weather Service has issued a Flood Warning for Arlington and surrounding areas.

The National Weather Service in Sterling Virginia has issued a

* Flood Warning for… The District of Columbia… Southeastern Montgomery County in central Maryland… Central Prince Georges County in central Maryland… The City of Fairfax in northern Virginia… Arlington County in northern Virginia… The City of Falls Church in northern Virginia… Central Fairfax County in northern Virginia… Northeastern Prince William County in northern Virginia… The City of Alexandria in northern Virginia…

* Until 1045 PM EDT Tuesday.

* At 443 PM EDT, Doppler radar indicated thunderstorms producing  heavy rain which will cause flooding. A quick inch or two of rain  will be possible on saturated ground.

* Some locations that may experience flooding include… Arlington, Alexandria, Bethesda, Annandale, Clinton, Springfield, College Park, Fort Washington, Greenbelt, Fairfax, Langley Park, Beltsville, Fort Hunt, Vienna, Groveton, Forestville, Falls Church, Huntington, Largo and Coral Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots.

Earlier: Arlington County is under a Severe Thunderstorm Watch through 9 p.m. tonight (Tuesday).

As of 4:15 p.m. a line of storms was heading toward the county from the northwest, bringing with it heavy rain and lightning.

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Severe Thunderstorm Warning Issued for Arlington

Arlington County is under a Severe Thunderstorm Warning as strong storms approach.

The National Weather Service issued the warning just before 8:35 p.m. It is in effect, at least initially, through 9:15 p.m.

More from NWS:

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING… * UNTIL 915 PM EDT. * AT 834 PM EDT, A SEVERE THUNDERSTORM WAS LOCATED OVER LAKE BARCROFT, OR OVER FALLS CHURCH, MOVING EAST AT 30 MPH. HAZARD…60 MPH WIND GUSTS AND QUARTER SIZE HAIL. SOURCE…RADAR INDICATED. IMPACT…DAMAGING WINDS WILL CAUSE SOME TREES AND LARGE BRANCHES TO FALL. THIS COULD INJURE THOSE OUTDOORS, AS WELL AS DAMAGE HOMES AND VEHICLES. ROADWAYS MAY BECOME BLOCKED BY DOWNED TREES. LOCALIZED POWER OUTAGES ARE POSSIBLE. UNSECURED LIGHT OBJECTS MAY BECOME PROJECTILES. * LOCATIONS IMPACTED INCLUDE… ARLINGTON, ALEXANDRIA, BETHESDA, ANNANDALE, CLINTON, SPRINGFIELD, COLLEGE PARK, FORT WASHINGTON, GREENBELT, FAIRFAX, LANGLEY PARK, BELTSVILLE, VIENNA, GROVETON, FORESTVILLE, FALLS CHURCH, HUNTINGTON, LARGO, CORAL HILLS AND BLADENSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS… GET INDOORS TO PROTECT YOURSELF FROM WIND AND LIGHTNING. TREES AROUND YOU MAY BE DOWNED FROM DAMAGING WINDS, SO IF YOU ARE NEAR LARGE TREES, MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. DON’T DRIVE UNDERNEATH TREES OR IN WOODED AREAS UNTIL THE THREAT HAS PASSED. && HAIL…1.00IN WIND…60MPH

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Flash Flood Watch Issued for Arlington

Update at 5:55 p.m. — Arlington and much of the D.C. and Baltimore region is now under a Severe Thunderstorm Watch.

Earlier: Arlington County and surrounding areas are currently under a Flash Flood Watch due to expected storms tonight.

Forecasters say heavy rain may lead to flash flooding, as it did last night along Four Mile Run.

More from the National Weather Service:

…FLASH FLOOD WATCH IN EFFECT FROM 3 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT…

A FRONT WILL SAG ACROSS THE REGION THIS AFTERNOON INTO THIS EVENING. A COUPLE ROUNDS OF THUNDERSTORMS ARE EXPECTED TO ACCOMPANY THE FRONT AND SHOULD MOVE ACROSS THE MASON-DIXON REGION LATE AFTERNOON. THESE THUNDERSTORMS SHOULD PUSH FARTHER SOUTH AND EAST INTO EASTERN WEST VIRGINIA, NORTHERN VIRGINIA AND PORTIONS OF NORTHERN MARYLAND DURING THE EVENING. HEAVY RAINFALL AND LIGHTNING WILL BE THE MAIN THREATS WITH THE POTENTIAL OF ENCOUNTERING DAMAGING WINDS AND HAIL IN THE STRONGEST THUNDERSTORMS. RAINFALL AMOUNTS COULD AVERAGE 1 TO 3 INCHES LATER THIS AFTERNOON AND THIS EVENING. FLASH FLOODING IS POSSIBLE, ESPECIALLY IN SLOW-MOVING THUNDERSTORMS.

FLASH FLOODING RISK IS FOR SMALL STREAMS PARTICULARLY IN URBAN AREAS LIKE BALTIMORE AND HAGERSTOWN. 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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UPDATED: Severe Storms Bring Wind, Torrential Rain to Arlington.

Update at 7:45 p.m. — There have been reports of downed trees, branches and power lines in Arlington, but no major power outages have been reported by Dominion. Flights are Reagan National Airport are resuming.

No major flooding issues have been reported, though ARLnow.com’s office sprung a leak during the storm.

Update at 7:01 p.m. — The Severe Thunderstorm Warning has been extended until 7:30 p.m.

Update at 6:58 p.m. — A Flash Flood Warning has also been issued for Arlington.

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Warning for…
The District of Columbia…
South central Montgomery County in central Maryland…
Arlington County in northern Virginia…
The City of Falls Church in northern Virginia…
Northeastern Fairfax County in northern Virginia…
The City of Alexandria in northern Virginia…

* Until 1000 PM EDT.

* At 654 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the area. Around an inch of rain has fallen, and
an additional 1 to 2 inches of rain is possible over the next 1
to 2 hours leading to flash flooding in the metro area.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Turn around, don’t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

(Updated at 6:55 p.m.) The National Weather Service has issued a Severe Thunderstorm Warning for Arlington as a powerful line of storms rolls through the county.

More from the National Weather Service:

…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR THE DISTRICT OF COLUMBIA…SOUTHERN MONTGOMERY…NORTHWESTERN PRINCE GEORGES…SOUTHEASTERN LOUDOUN…FAIRFAX…EAST CENTRAL FAUQUIER…PRINCE WILLIAM…AND ARLINGTON COUNTIES…THE CITY OF FALLS CHURCH…THE CITY OF MANASSAS PARK…THE CITY OF MANASSAS…THE CITY OF FAIRFAX AND THE CITY OF ALEXANDRIA…

At 646 PM EDT, severe thunderstorms were located along a line extending from Bethesda to Newington to 11 miles east of Bealeton, moving southeast at 35 mph.

HAZARD…70 mph wind gusts and quarter size hail.

SOURCE…Radar indicated.

IMPACT…Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles.

Locations impacted include…
Arlington, Alexandria, Germantown, Centreville, Dale City, Rockville, Bethesda, Gaithersburg, Reston, Annandale, Springfield, College Park, South Riding, Fort Washington, Herndon, Greenbelt, Fairfax, Langley Park, Fort Hunt and Vienna.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Prepare immediately for large hail and damaging winds. People outside should move to a shelter, inside a strong building and away from windows.

Reagan National Airport, meanwhile, has imposed a ground stop on flights due to the severe weather.

Photo (top) courtesy Milan

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UPDATE: Derecho Possible Tonight, Forecasters Say

Update at 2:25 p.m. — Forecasters warn that a derecho is possible tonight. The last such wind event to hit the region caused significant damage on June 29, 2012.

Earlier: Arlington County and much of the D.C. region is under a Severe Thunderstorm Watch today.

The National Weather Service says severe storms are possible later today (Monday)

“Scattered severe thunderstorms with damaging wind gusts and large hail are possible this afternoon and evening,” NWS said in a Hazardous Weather Outlook statement.

Photo via @NWS_BaltWash

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