Overview
- A very deep marine layer, roughly 3,000–4,000 feet thick, is driving persistent low clouds over San Luis Obispo and Santa Barbara counties and keeping coastal highs stuck in the 60s and interior highs in the 70s.
- Very light drizzle is possible late tonight into Friday morning along the western beaches, and forecasters say Friday will be the coolest day of the stretch.
- Low clouds and cool mornings are expected to persist through the weekend with only modest afternoon warming and gradual moderation beginning Sunday.
- Models show the marine layer compressing early next week as an upper-level high builds, which should clear valley clouds and allow inland temperatures to rise rapidly into the 80s and 90s by midweek, with Paso Robles most likely to reach the 90s.
- Gusty onshore winds are forecast through the transition, raising risks for elevated surf and rip currents at beaches and creating uneven temperature and local fire-weather effects in mountain gaps and inland areas.