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Fairfax County residents report loud boom, possibly caused by lightning

Lightning (via Breno Machado/Unsplash)

(Updated at 7:20 a.m.) A transformer blowing out? A meteor? Or just really loud thunder?

A big boom was reported across a wide swath of Fairfax County from Reston and Herndon to McLean around 10:40 a.m. on Tuesday, leaving many residents confused regarding the possible source.

The sound was likely caused by loud thunder that accompanied a storm that was crossing the area at the time. 

The Fairfax County Fire and Rescue Department reported that it dispatched units to the 13000 block of Woodland Park Road in Reston at approximately 10:59 a.m. after a building there was struck by lightning.

One McLean resident told FFXnow by email that she heard “a loud boom/explosion that did not sound like thunder” around about 10:35 a.m.

“We are on Brook Rd between Rt 7 and Old Dominion Dr.,” Diane Van Tuyl wrote. “My friend in Great Falls on Towlston Rd also heard it. She felt rumbling and some shaking.”

Other residents took to social media to share their bafflement regarding the possible source of the sound, which one user compared to a concussion grenade:

Last week, the National Aeronautics and Space Administration said a similar boom heard through the greater Shenandoah County region was a fireball

This time, meteorologists with the Washington Post’s Capital Weather Gang say they’re reasonably confident it was a particularly powerful lightning strike that happened during atmospheric conditions that allowed it to be heard from miles away.

Photo via Breno Machado/Unsplash

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