Low marine layer clouds brought dense fog into San Diego County the morning of September 22nd. The fog moved into the valley areas of San Diego County on the between approximately 6 AM and 7 AM PST on the 22nd, and dropped visibility to nearly 500 ft at the NWS office.
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The episode as NWS SGX wrote it up.
Low marine layer clouds brought dense fog into San Diego County the morning of September 22nd. The fog moved into the valley areas of San Diego County on the between approximately 6 AM and 7 AM PST on the 22nd, and dropped visibility to nearly 500 ft at the NWS office. The fog began to clear after sunrise.
The national radar mosaic for the moment the first event began.
1 dense fog. Local standard time, as filed.
An NWS employee reported dense fog and visibility around 500 feet between 6 AM and 7 AM PST on the 22nd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2018Every state in 2018This day in weather historyWarnings in California, September 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 786384.