Imagine a lightning bolt igniting in a giant thunderstorm over San Diego and then shooting north almost all the way to San Francisco.
If that seems impossible, consider that just such a prodigious lightning flash has now been confirmed — not in SoCal but in South America. It happened on Halloween of 2018, when a system of massive thunderstorms boiled up over southern Brazil and spawned a single bolt stretching across 440 miles, from the Atlantic coast all the way into Argentina.
