San Jose residents should prepare for an unexpected weather shift today, as a strong storm system is set to bring thunderstorms, heavy rain, and even small hail. Weather experts are warning that unstable conditions could lead to sudden downpours and dangerous driving conditions across the region.
Storm Details
A powerful upper-level storm is making its way along the California coast, bringing a surge of cold air into the Bay Area. As a result, freezing levels are expected to drop between 2,500 and 3,500 feet, meaning the highest peaks, like Mount Hamilton and Mount Isabel, could even see some light snowfall.
However, the bigger concern for most residents is the risk of thunderstorms, which could bring bursts of heavy rain, lightning, and small hail. The South Bay and Santa Cruz regions are most likely to be affected, though isolated storms could also pop up in other parts of the Bay Area.
When to Expect the Storms
The storm is expected to impact San Jose throughout the morning and afternoon. While not everyone will see hail, those caught in the strongest cells could experience sudden, intense weather changes. San Francisco and other parts of the Bay Area have a lower chance of seeing storms, but the possibility remains if the system slows down.
How to Stay Safe

With unpredictable weather ahead, residents should take precautions to stay safe:
- Stay Informed: Check local weather updates frequently for any warnings or advisories.
- Avoid Outdoor Activities: If you’re outside and see dark clouds forming, seek shelter immediately.
- Drive Carefully: Roads could become slick and hazardous, especially if hail begins to fall. Drive slowly and keep your headlights on for visibility.
Final Thoughts
San Jose’s typically mild weather is taking a dramatic turn today, with thunderstorms and hail adding an unexpected twist. Stay aware of changing conditions and take the necessary steps to stay safe. With stormy weather on the horizon, it’s best to be prepared for anything.