
Huge boom heard in Loudoun Co and surroundings last night ~11p. There were storms in area. Boom probably positive lightning strike from elevated convection. Thunder can sound louder in elevated convection b/c temp inversion beneath storms helps trap channel sound waves, allowing them to travel farther. Positive strike often louder b/c has higher electrical charge & peak current than negative strike, heating air more intensely & creates stronger shock wave, resulting in louder, more explosive thunder. And yes, 401 ka, per mention below, is extremely strong, many times stronger than typical bolt













