This looks like it could be fun. From Daniel Swain of Weather West:

On Tue, a slow-moving low will drift toward Central Coast. By this point, it will have entrained copious tropical moisture on its eastern flank. The airmass will be convectively quite unstable by CA standards, & mid-level ascent will provide trigger for t-storm development.

This time of year I let the dogs out at 7 am — mountain lions usually hunt between dusk and dawn, so I want dawn to be over before I let them out. This morning at exactly 7 am, Lady came and put her chin on the foot of my bed. Who says dogs can’t tell time?