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I was out for six months with nonstop fog, and then Trevor got it with bad weather for like 5 months, and now, just when my new observatory, solid pier, paramount, off axis guiding with rotator... and now, fog rolls in three days now. It's thick fog that never leaves. It's going to rain on thursday that'll clear it out, but it'll just build back up again.
This is caused primarily by La Nina, or colder than normal ocean temperatures. They say La Nina lasts two years on average, this one is going on three. In Southern California we typically have 2 to 6 weeks of fog in late spring, called June Gloom. It lasted six months last two years. This year i'm hoping it's different, and it just lasts a short period.