From the ABC 7 Weather team

Severe thunderstorms in the D.C. area Thursday

June 13, 2013 - 12:05 PM
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Stay here for the latest updates where the storms are.

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5:53pm: Our WeatherBug station reports 1.24" of rain in Columbia, MD, 1.2" in Jessup, 1.11" in Hamilton and 1.04" in Germantown. 

5:52pm: A Flood Warning is in effect until 9:45pm for Anne Arundel, Loudoun, Montgomery, Howard and Baltimore Counties. Recent rainfall of 1-2 inches will cause rises on some creeks and rivers.

5:49pm: Unfortunately for some, now it is time to pick up the debris left behind. Here is one example from Lexington Park, MD from Dawn Elliott of a large tree down in her backyard.

5:19pm: Here is a link to all of the local storm reports from the National Weather Service office in Sterling, VA which issues the watches and warnings for the D.C. area.

4:49 p.m.: Most of the major alerts and warnings have been canceled for many parts of the D.C. area, but the storm is making its way toward the Eastern Shore.

The Bay Bridge has been closed in both directions while the storm pushes through.

4:33 p.m.: Power outages are becoming a major problem for the entire area, with tens of thousands regionwide in the dark. Follow the latest numbers and find out who to call for help here.

4:22 p.m.: Passengers and staff at BWI Airport near Baltimore have been ordered to take shelter away from windows due to the severe storms.

4:17 p.m.: The National Weather Service says that confirmed tornadoes have touched down today in Laurel and Olney.

4:16 p.m.: Tornado Warnings continue to exist in portions of Anne Arundel, Prince George's and Montgomery counties.

If a tornado warning is issued, take cover in an interior room on the lowest floor of the building you're in.

2:35pm: A Tornado Warning is in effect just south of Fredericksburg, VA for Spotsylvania County in VA until 3pm. A funnel cloud was reported with this storm located 3 miles west-southwest of Fredericksburg and just west of I-95. The warning is in effect until 3pm.

2:06pm: Severe T-Storm Warnings are in effect until 3:15pm for the northern Shenandoah Valley. Storms are headed towards I-81 with possible gusts to 60mph.

Another area of severe storms are just southwest of Frederickburg in VA. These storms are capable of producing large hail and damaging winds.

Doppler here

1:51pm: The next line of storms is approaching the I-81 corridor as it exits the mountains and enters the Shenandoah Valley. Severe T-Storm Warnings are posted for severe winds and large hail. Be sure to keep an eye on Live Doppler Radar as these storms move into the region from the west.

12:28pm: A Severe T-Storm Watch is in effect until 7pm for the majority of the D.C. area. Damaging winds, large hail and an isolated tornado may be possible during the afternoon hours so be sure to stay tuned to the latest severe weather alerts.

12:07pm: Skies are beginning to clear ahead of the next line of storms. This will lead to added instability with additional heating and will help fuel these storms as they pass east of the Appalachian Mountains.

11:54am: A new Severe T-Storm Watch will be issued soon for the D.C. area and points south. In addition, a Moderate Risk for severe storms will also be placed over portions of North Carolina. The Mesoscale Discussion can be found here.

11:39am: Temperatures are on the rise into the low 80s around D.C. and south but still in the 70s with some stratiform precipitation and clouds lingering around the northwestern suburbs. Winds are currently breezy out ahead of the trailing cold front moving into West Virginia. Conditions for lunch will be fine so no worries about storms over the next hour.

HRRR Model showing forecast composite reflectivity this afternoon

A severe line of storms is moving into WV and is expected to reach the D.C. area later this afternoon between 2pm and 6pm today but may linger even later as they cross the D.C. metro. Models are expecting a line a storms to develop west of D.C. and move east towards the Metro and I-95 corridor south of D.C. Storms may again feature damaging winds and large hail, though a weak tornado may not be out of the question as well.

This system is already developing strong storms over the mountains that I am concerned will continue to intensify once they get east of the Blue Ridge into a more unstable airmass. We'll keep you posted.

9:51am: Storms have weakened as they moved into the D.C. area. It looked as if outflow came through ahead of the storms and took away some of the strength from the line. The Severe Thunderstorm Watch has been cancelled for the majority of the D.C. area besides Calvert and Anne Arundel Counties which will follow shortly.

More storms are developing west of the D.C. area, with the strongest in Ohio and West Virginia. This is the area we will watch for additional development through the early afternoon. Severe storms will continue to be possible through the afternoon hours, and the D.C. area is still under a Moderate Risk for severe weather today.

We are still expecting more storms to fire this afternoon as some clearing is already being noted across parts of the D.C. area. This will help to destabilize the atmosphere, which doesn't need much more destabilization given the already strong dynamics as the area of low pressure and associated shortwave trough approach the reagion from the west.

Numerous showers and storms are expected to affect the D.C. area between 2pm and 6pm and another Severe Watch with Warnings will be possible. The storm activity later today has to potential to be stronger than what the region saw this morning, so don't let your guard down just yet. We will keep you aware of the latest developments through the day so you stay a step ahead of the game.

9:28am: Severe T-Storm Warning in effect for Prince Georges County and Anne Arundel through 10:15am. The majority of this storm is already out of Prince Georges County and the hardest hit areas will be in Anne Arundel from Annapolis and points north. This line will affect the Bay Bridge east to Kent Island and the Delmarva.

9:22am: Storms are rolling through the D.C. Metro currently and will be through the city over the next 30 minutes or so heading into Prince Georges County and Southern MD. Radar Here (Hit Control and F5 at the same time to refresh)

8:48am: Don't forget to check out our HD weather cameras, they are showing some pretty gnarly skies right now!

8:34am: Here are two pictures from Megan Bower. One near Woodstock, VA (top) and the other near Strasburg, VA (bottom).

Shelf Cloud near Woodstock, VA
Near Strasburg, VA

8:26am: Storms are beginning to enter Leesburg in Loudoun Co., VA as well as extreme western Montgomery Co. in MD. Damascus, Mt. Airy and Clarksburg will all be affected soon. Another strong storm is located in Western Fauquier County moving east towards The Plains, VA along I-66.

LATEST RADAR IMAGE

8:11am: Quarter to Half Dollar sized hail was reported in Libertytown, MD in Ferederick County.

8:04am: A tree has been reported down in Washington Co., MD near Keedysville from emergency managers. 

8:03am: A Severe T-Storm Watch continues through the Eastern Shore as well through 11am.

7:55am: Severe T-Storm Warnings now extend east to Loudoun County in VA through 8:30am. Damaging winds are still the primary threat in these storms. Radar HERE.

7:49am: A Severe T-Storm Warning is in effect for Frederick in MD, Carroll, Washington, Berkeley and Jefferson Counties may have damaging winds up to 70mph and hail to the size of half dollars! The strongest part of this line is in Northern Frederick County in MD.

7:36am: A Severe T-Storm Warning is currently in effect for Frederick, Berkeley, Jefferson and Washington Counties until 8:15am. Winds in excess of 60mph are possible in this line of storms.

7:28am: A Severe Thunderstorm Watch is in effect through 11am this morning as a line of thunderstorms moves towards the D.C. Metro area. Damaging wind gusts will be the primary threat in this line of storms as it moves through the D.C. area by 10am. The Watch covers the majority of the D.C. area besides Stafford County and south in VA and St. Marys County in MD.

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