Please refer to Lightning Strike #1 GC3C03C for the background to this cache.
Video recording information for LS#3:
The storm had moved away from Flash, but Boom was still in the thick of it! From Flash's recording the bearing to the strike was found to be 192.059° True. With weather limiting Boom's view, the strike bearing couldn't be determined from his recording, only that it was to the North and West. Nonetheless, the delay between the sighting of the bolt and the sound of thunder at Boom's location could be measured; it was 2.598 seconds.
I had some trouble figuring out where this strike hit. Things made sense when I recalled that the Sines of (angle) and (180-angle) are equal.
Check the answer with Geocheck. Look for parking information and cache hint with the solution.