San Jose woke up today to a gray start and a cool 55°F at Mineta San José International Airport, with steady rain already on tap. That early soaking is expected to shift to scattered showers and a chance of thunderstorms this afternoon and evening, with brief heavy downpours in the mix. Most neighborhoods are in line for about a quarter to a half inch of new rain, with locally higher amounts under stronger cells. South winds should stay on the lighter side, although gusts could occasionally push near 20 mph.
Afternoon Thunderstorm Risk
Scattered thunderstorms are favored across the South Bay and the Peninsula later today, and they could pack a quick punch. Lightning, brief heavy rain, and small hail are the main concerns, along with some erratic wind gusts and localized heavy downpours. The National Weather Service pegs the convective threat at roughly 30–40% and urges residents to head indoors when thunder roars. According to the National Weather Service, people should seek shelter during lightning and avoid…..