SAN FRANCISCO (KGO) -- Thousands of lightning strikes lit up the Bay Area skies for hours Sunday morning as rare thunderstorms rolled through.
The combination of excessive heat and moisture from a tropical storm 1,000 miles to our south set the stage for the dramatic light show.
VIDEO: Compilation of lightning during rare Bay Area thunderstorms
It is not uncommon to have intense heat this time of the year. High pressure is currently set up in the desert southwest, acting like a heat pump sending record breaking heat through much of California.
The wildcard in the forecast is Tropical Storm Fausto, 1,000 miles to our south off the coast of Mexico.
Moisture from the tropical storm is being funneled into Northern California thanks to the clockwise circulation around high pressure with the Bay Area in the direct path.
VIDEO: ABC7 tower cameras capture incredible lightning show across Bay Area
As the moisture interacts with our intense heat, instability occurs and thunderstorms develop.
Thanks to Fausto continually sending moisture into the Bay Area, storms were allowed to live for long periods of time causing lighting to strike for hours. This pattern does not look to change overnight into Monday morning so thunderstorms will remain in the forecast.
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