The Bay Area will turn cooler and cloudier this week as the marine layer thickens and a weak low-pressure system passes north of the region.
Early Tuesday observations showed low clouds concentrated along the coast, San Francisco, the Peninsula and parts of the bayshore, while inland valleys were still positioned for some afternoon clearing. That keeps the main forecast split intact with cooler and cloudier conditions near the water, milder inland and breezier conditions by late day as onshore flow strengthens.
On Tuesday, clouds will be hard to clear in the city and along the bayshore. Inland areas should still see some afternoon sunshine, but temperatures will step down from Monday’s brief warmup. Most inland neighborhoods will fall back into the 70s and lower 80s, while San Francisco, Oakland and the coast stay in the 60s to lower 70s.Winds will become more of a factor as the day progresses. By Tuesday afternoon, most neighborhoods will see west or northwest winds around 10 to 25 mph, with stronger gusts along the coast and through gaps and passes.
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The bigger cooldown arrives Wednesday as the low moves inland across Oregon and Northern California. The system’s northern track now makes widespread rain less likely in the Bay Area, but it should still reinforce the marine layer and keep a chance of drizzle or very light rain in the forecast, especially along the coast and coastal ranges…