Developing Thunderstorm / Lightning- Time Lapse

August 17, 2021. San Miguel de Allende, Mexico.
No Thunderstorms expected. I set my GoPro up for a simple Time Lapse video of the city and simple puffy cloud action for the 4th time in 2 weeks and just happened to be pointed in the right direction for this surprise
Shooting one frame in 5 seconds from 4:00 PM to 7:30 PM when rain finally cut my project about 45 minutes short.
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