San Jose, United States - September 24, 2025 A video posted on X by William Justo captures a nighttime lightning display during the North American monsoon season. The footage shows sporadic lightning strikes illuminating the sky above a residential area. Bright flashes stand out sharply against the dark sky. The event is part of the 2025 monsoon season, known for bringing increased thunderstorm activity to the region, particularly in late summer and early fall. The lightning results from moisture from the Gulf of California and the eastern Pacific, which contributes to thunderstorm formation, especially at higher elevations. The video's timing aligns with typical monsoon activity, which can extend into September, as indicated by weather forecasts for San Jose.