Update at 12:40 p.m. — The tornado watch has been canceled.
Update at 12:30 p.m. — The cold front passed relatively quietly through Arlington, mostly producing light rain. Our tornado danger appears to be over.
The National Weather Service has issued a Tornado Watch for the Arlington County and the D.C. region through 5:00 p.m.
The watch signifies a slight chance of tornadoes from a cold front that will be moving through the area in the early afternoon. Thunderstorms and damaging winds are also possible with the front. From NWS:
THUNDERSTORMS CONTAINING DAMAGING WINDS AND ISOLATED TORNADOES ARE POSSIBLE OVER PORTIONS OF NORTHERN VIRGINIA…THE INTERSTATE 95 CORRIDOR AND POINTS EAST. RESIDENTS SHOULD MONITOR THIS SITUATION VERY CLOSELY AND ENSURE YOUR NOAA WEATHER RADIOS ARE SET TO ALERT MODE. SEVERE WEATHER WARNINGS MAY BECOME NECESSARY. HERE ARE SOME SAFETY RULES TO KEEP IN MIND WHEN SEVERE WEATHER IS EXPECTED OR IS OCCURRING.
IF A WARNING IS ISSUED…SEEK SHELTER INDOORS IMMEDIATELY. A SEVERE THUNDERSTORM IS DEFINED AS PRODUCING QUARTER SIZE OR GREATER HAIL AND WIND GUSTS OF 58 MPH OR MORE.
TORNADOES OFTEN FORM VERY RAPIDLY FROM SEVERE THUNDERSTORMS. IF YOU ARE IN A TORNADO WATCH…AND A SEVERE THUNDERSTORM WARNING IS ISSUED FOR YOUR AREA…MONITOR LOCAL CONDITIONS CLOSELY AND BE READY TO TAKE QUICK ACTION TO SAVE YOUR LIFE.
STAY TUNED TO NOAA WEATHER RADIO…COMMERCIAL RADIO OR TELEVISION FOR THE LATEST ON THIS POTENTIAL SEVERE WEATHER EVENT. ADDITIONAL WEATHER INFORMATION…CAN BE FOUND AT WEATHER.GOV/WASHINGTON OR WEATHER.GOV/BALTIMORE.
Arlington and the surrounding D.C. region is under a Flood Watch through midnight tonight.
Forecasters say 3-6 inches of rain has fallen since Wednesday and another 1-3 inches is expected tonight, raising the possibility of flooding. From the National Weather Service:
…FLOOD WATCH IN EFFECT UNTIL MIDNIGHT EDT TONIGHT…
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS EXPANDED
* FLOOD WATCH TO INCLUDE PORTIONS OF MARYLAND…THE DISTRICT OF
COLUMBIA AND VIRGINIA…INCLUDING THE FOLLOWING AREAS…IN
MONTGOMERY…PRINCE GEORGES AND ST. MARYS. THE DISTRICT OF
COLUMBIA. IN VIRGINIA…ARLINGTON/FALLS CHURCH/ALEXANDRIA…
FAUQUIER…SPOTSYLVANIA AND STAFFORD.
* UNTIL MIDNIGHT EDT TONIGHT
* THREE TO SIX INCHES OF RAIN HAS ALREADY FALLEN SINCE WEDNESDAY
ACROSS THE GREATER WASHINGTON DC METRO AREA…CENTRAL MARYLAND
AND THE NORTHERN PIEDMONT REGION OF VIRGINIA. STEADY MODERATE TO
HEAVY RAIN CURRENTLY OVER NORTHERN VIRGINIA WILL SLOWLY SHIFT
SOUTHWARD THROUGH MIDNIGHT.
* ADDITIONAL AMOUNTS OF ONE TO LOCALLY THREE INCHES ARE POSSIBLE
THROUGH THIS EVENING. THIS AMOUNT OF RAINFALL WOULD CAUSE
FLOODING OF SMALL STREAMS AND URBAN AREAS.
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
Arlington County is under a Severe Thunderstorm Watch until 10:00 p.m. tonight, according to the National Weather Service.
Forecasters say severe storms may form as a cold front approaches the area. From Arlington County:
The NWS has issued a Severe Thunderstorm Watch for the NCR, Northern Virginia, and Maryland, effective until 2200 tonight. A cold front will approach the area today and will produce numerous thunderstorms. A few of these storms will be capable of producing locally damaging wind gusts and large hail.
Update at 4:25 p.m. — The county is now under a Severe Thunderstorm Warning.
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR… THE DISTRICT OF COLUMBIA… SOUTHEASTERN MONTGOMERY COUNTY IN CENTRAL MARYLAND… CITY OF FAIRFAX IN NORTHERN VIRGINIA… CITY OF FALLS CHURCH IN NORTHERN VIRGINIA… ARLINGTON COUNTY IN NORTHERN VIRGINIA… CITY OF ALEXANDRIA IN NORTHERN VIRGINIA… WESTERN PRINCE GEORGES COUNTY IN CENTRAL MARYLAND… CENTRAL FAIRFAX COUNTY IN NORTHERN VIRGINIA…
* UNTIL 500 PM EDT
* AT 416 PM EDT…A SEVERE THUNDERSTORM WAS DETECTED NEAR POTOMAC… AND ANOTHER OVER FAIRFAX CITY. THOSE STORMS ARE FORECAST TO COMBINE OVER THE DISTRICT AS THE MOVE EAST AT 10 MPH. THESE STORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
* LOCATIONS IMPACTED INCLUDE… THE DISTRICT OF COLUMBIA… BETHESDA… AMERICAN UNIVERSITY… CHEVY CHASE… GEORGETOWN… TAKOMA PARK… LANGLEY PARK… WHITE OAK… HILLANDALE…
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH…MOVE INDOORS TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO SO…REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE NATIONAL WEATHER SERVICE.
THIS STORM IS PRODUCING FREQUENT CLOUD TO GROUND LIGHTNING. IF YOU CAN HEAR THUNDER…YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE INDOORS IMMEDIATELY.
Update at 4:35 p.m. — Reagan National Airport is currently under a ground stop due to storms.
Arlington is currently under a Severe Thunderstorm Watch as storms develop to the west of the immediate Metro area.
The watch is in effect through 10:00 p.m. From the National Weather Service:
CLUSTERS OF THUNDERSTORMS CAN BE EXPECTED THIS AFTERNOON AND EVENING. SOME OF THESE STORMS WILL BE CAPABLE OF BECOMING SEVERE…PRODUCING DAMAGING WIND GUSTS AND LARGE HAIL.
Arlington and the surrounding D.C. region is under a Severe Thunderstorm Watch.
The National Weather Service issued the watch just after 2:45 p.m. It expires at 10:00 p.m.
Forecasters say scattered thunderstorms are expected this afternoon and evening, and the storms may produce “locally damaging wind gusts and large hail.”
Update at 3:00 p.m. — A Flash Flood Warning has been issued for Arlington, D.C., Alexandria and Fairfax County. The National Weather Service says very heavy rain has produced the imminent risk of flash flooding around streams and low-lying areas.
A Tornado Watch has been issued for Arlington and the surrounding region.
The National Weather Service says weather conditions are conducive to the formation of tornadoes. The watch is in effect until 10:00 p.m.
From an earlier weather advisory:
A FLASH FLOOD WATCH IS IN EFFECT FOR THE OUTLOOK AREA UNTIL MIDNIGHT. EPISODES OF HEAVY RAINFALL WILL LEAD TO FLASH FLOODING IN SOME AREAS…PARTICULARLY THIS AFTERNOON AND EVENING.
IN ADDITION…SOME THUNDERSTORMS MAY BECOME SEVERE DURING THE AFTERNOON AND EARLY EVENING. THE PRIMARY THREAT WILL BE DAMAGING WIND GUSTS…HOWEVER A FEW TORNADOES ARE POSSIBLE.
Update at 9:10 p.m. — The storm is expected to impact Arlington within the next hour.
… STRONG THUNDERSTORM TO AFFECT ARLINGTON… MONTGOMERY… PRINCE WILLIAM/MANASSAS/MANASSAS PARK… PRINCE GEORGES… LOUDOUN AND FAIRFAX COUNTIES…
AT 858 PM EDT… A STRONG THUNDERSTORM WAS LOCATED OVER CENTREVILLE… MOVING EAST AT 20 MPH.
LOCATIONS IMPACTED INCLUDE FAIRFAX… OAKTON… MANTUA… VIENNA… THE I66 AND I495 INTERCHANGE… MERRIFIELD… DUNN LORING… TYSONS CORNER… PIMMIT HILLS AND FALLS CHURCH.
THIS STORM IS PRODUCING FREQUENT CLOUD TO GROUND LIGHTNING. MOVE INDOORS IMMEDIATELY FOR YOUR SAFETY. IF YOU CAN HEAR THUNDER… YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.
HEAVY RAIN WITH THIS STORM WILL REDUCE VISIBILITIES TO BELOW ONE MILE AND MAY CAUSE PONDING OF WATER ON ROADWAYS.
WIND GUSTS OF UP TO 40 MPH CAN BE EXPECTED WITH THIS STORM.
The National Weather Service has issued a Severe Thunderstorm Watch for the D.C. area through midnight tonight (Thursday). A line of rain and strong storms are slowly approaching from the west.
From Arlington Alerts:
The National Weather Service has issued a Severe Thunderstorm Watch for all of the Metro Area, effective until 12 midnight. The current most likely time of thunderstorm arrival is between 7:30 and 9:15 PM. Storms are moving east at 15 mph with reported 60 mph wind gusts.
Arlington and the entire D.C. area is under a Tornado Watch through 7:00 tonight.
Forecasters say a line of strong storms will make its way through the area between 1:00 and 7:00 p.m. The storms could produce damaging winds, heavy rains and isolated tornadoes, according to the National Weather Service.
SHOWERS AND THUNDERSTORMS ARE EXPECTED ALONG AND AHEAD OF A COLD FRONT THROUGH THIS EVENING. HEAVY DOWNPOURS COULD LEAD TO LOCALIZED FLASH FLOODING. IN ADDITION…SOME THUNDERSTORMS MAY BE SEVERE AND PRODUCE DAMAGING WIND GUSTS AND ISOLATED TORNADOES. THE MOST LIKELY TIME FOR SEVERE WEATHER LOOKS TO BE FROM 1 PM TO 7 PM.
Update at 3:35 p.m. — Arlington is now under a Severe Thunderstorm Warning through 4:30 p.m.
A Severe Thunderstorm Watch has been issued for the region through 10:00 p.m.
The National Weather Services says an approaching line of storms could bring heavy rain and damaging winds.
A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED UNTIL 10PM EDT. THUNDERSTORMS ARE EXPECTED THIS AFTERNOON INTO THE EVENING IN ADVANCE OF A COLD FRONT APPROACHING FROM THE WEST. SOME STORMS WILL PRODUCE DAMAGING WIND GUSTS OF UP TO 70 MPH. ISOLATED TORNADOES ARE ALSO POSSIBLE.
Arlington and the surrounding region is under a Severe Thunderstorm Watch through early Friday morning. A line of storms approaching the area may bring downpours, lighting and high winds.
From Arlington Alerts:
The National Weather Service has issued a SEVERE THUNDERSTORM WATCH for Arlington County and surrounding suburbs and the District until 1:00 am.
Those with outdoor plans this evening should monitor the skies and be prepared for threatening weather. Lightning is the number one severe weather killer in the US. If you are outdoors and a storm approaches, seek safe shelter indoors.
A SEVERE THUNDERSTORM WATCH means conditions are favorable for severe storms in and close to the watch area. Severe thunderstorms can and occasionally do produce tornadoes with little or no advanced warning. Residents should be on the lookout for threatening weather conditions and listen for later statements and possible warnings.
A Severe Thunderstrom Watch has been issued for Arlington and the surrounding region through 8:00 p.m.
The National Weather Service says the potential exists for storms and damaging winds this evening.
A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 800 PM EDT. SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON ALONG AND SOUTH OF A SLOW-MOVING COLD FRONT. SOME STORMS WILL BECOME SEVERE AND WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND POSSIBLY LARGE HAIL.
A Severe Thunderstorm Watch is in effect for Arlington and the surrounding region through 9:00 tonight.
Forecasters with the National Weather Service say scattered thunderstorms this afternoon and evening may produce damaging wind gusts, large hail, and heavy rainfall that could lead to flash flooding.
The area is also under a heat advisory. From NWS:
…HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING…
* HEAT INDEX VALUES…AROUND 105 DEGREES.
* MAXIMUM TEMPERATURES…AROUND 100 IN THE CITIES…UPPER 90S ELSEWHERE EAST OF THE MOUNTAINS.
A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS…STAY IN AN AIR-CONDITIONED ROOM…STAY OUT OF THE SUN…AND CHECK ON ELDERLY RELATIVES AND NEIGHBORS. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE.
NEVER LEAVE SMALL CHILDREN OR PETS UNATTENDED IN VEHICLES. TEMPERATURES INSIDE THE VEHICLE CAN RAPIDLY CLIMB TO 130 DEGREES.
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.
TO REDUCE RISK DURING OUTDOOR WORK…THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY – CALL 9 1 1.
(Updated at 10:30 p.m.) The region is under a Severe Thunderstorm Warning through 11:15 p.m. Forecasters say a line of powerful storms known as a derecho is quickly moving our way from the Ohio Valley.
From the National Weather Service:
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING…
* UNTIL 1115 PM EDT
* AT 1009 PM EDT… SEVERE THUNDERSTORMS WERE DETECTED ALONG A LINE EXTENDING FROM 7 MILES NORTHEAST OF BRUNSWICK TO OATLANDS TO 10 MILES SOUTH OF BEALETON TO 25 MILES WEST OF MASSAPONAX… AND WERE MOVING EAST AT 60 MPH. THIS LINE OF STORMS IS CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF QUARTERS AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.
* LOCATIONS IMPACTED INCLUDE… HARRY GROVE STADIUM… SOUTH RIDING… LANSDOWNE… BROADLANDS… POOLESVILLE… HERNDON… DULLES INTERNATIONAL AIRPORT… COUNTRYSIDE… LOWES ISLAND… GREEN VALLEY…
THIS IS A DANGEROUS LINE OF STORMS. IF YOU ARE IN ITS PATH… MOVE INDOORS TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO SO… REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE NATIONAL WEATHER SERVICE.
THIS LINE OF STORMS HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. SEEK SHELTER INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
SEVERE THUNDERSTORMS WITH DAMAGING WIND GUSTS TO IMPACT REGION THIS EVENING…
AT 745 PM… A LINE OF SEVERE THUNDERSTORMS PRODUCING DAMAGING WIND GUSTS WAS CROSSING SOUTHEAST PENNSYLVANIA AND CENTRAL WEST VIRGINIA. THIS LINE OF THUNDERSTORMS IS EXPECTED TO HIT THE POTOMAC HIGHLANDS BETWEEN 8 AND 8:30 PM… THE SHENANDOAH VALLEY BETWEEN 8:30 AND 9 PM… THE INTERSTATE 95 CORRIDOR INCLUDING THE GREATER WASHINGTON AND BALTIMORE METROPOLITAN AREAS BETWEEN 9:30 AND 10 PM… THEN REACHING THE CHESAPEAKE BAY BETWEEN 10:30 AND 11 PM.
THIS LINE OF STORMS HAS A HISTORY OF PRODUCING MAJOR WIND DAMAGE ACROSS WEST VIRGINIA DUE TO WIND GUSTS OVER 75 MPH… ALONG WITH PROLIFIC CLOUD TO GROUND LIGHTNING.
Arlington and the surrounding region is under a Severe Thunderstorm Watch until 9:00 tonight.
Forecasters say the storms have the potential to produce “damaging wind gusts and locally heavy rainfall.”
Some hail is also possible.
A flash flood watch has been issued for Arlington and the rest of the D.C. region due to showers and thunderstorms expected to arrive in the area later today.
The National Weather Service says one to two inches of rainfall can be expected in a short period of time.
FROM NOON EDT TODAY THROUGH THIS EVENING
* SHOWERS AND THUNDERSTORMS WILL DEVELOP TODAY… AND BE NUMEROUS TO WIDESPREAD THIS AFTERNOON INTO EARLY THIS EVENING. A FEW OF THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL. WIDESPREAD RAINFALL AMOUNTS OF ONE TO TWO INCHES CAN BE EXPECTED IN THE INTERSTATE 95 CORRIDOR THROUGH THIS EVENING. HOWEVER… A BAND OF HEAVIER RAINFALL… PRODUCING RAINFALL IN EXCESS OF TWO INCHES IN JUST A COUPLE OF HOURS… WILL BE POSSIBLE.