In the wake of a weak trough of low pressure an upper level ridge built in over Southern California. This warming aloft compressed the marine layer along the coast.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SGX wrote it up.
In the wake of a weak trough of low pressure an upper level ridge built in over Southern California. This warming aloft compressed the marine layer along the coast. The result was night and morning dense fog over the coastal waters and within 2-4 miles of the coast, some of which lingered into the early afternoon along the beaches.
The national radar mosaic for the moment the first event began.
7 dense fog. Local standard time, as filed.
A small plane crashed due to dense fog with a visibility of 1/4 mile or less at San Diego Brown Field around 0300 PST.
A brief period of dense fog with 1/4 mile visibility or less impacted Brown Field.
Lifeguards reported dense fog with a visibility of 100 yards or less at Newport Beach and Huntington Beach. The fog lingered into the afternoon with visibility still below 1/4 mile at 1300 PST.
A 12 car pileup caused major traffic delays on Interstate 15 near the Interstate 8 interchange.
The sea breeze brought dense fog with a visibility of 1/8 of a mile or less to the beaches of northern San Diego County during the late morning and early afternoon. Both Solana Beach and San Clemente Beach were impacted.
Dense fog with a visibility of 1/4 mile or less impacted areas within 8 miles of the coast starting at 0200 PST. The fog retreated to the beaches after sunrise and lingered there into the afternoon. San Clemente was still reporting zero visibility at 1600 PST.
Dense fog with visibility of 1/4 mile or less hugged the beaches of Orange County for most of the day. Huntington Beach Lifeguards reported near zero visibility for the entire day.|The Huntington Beach Air Show training was cancelled.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2017Every state in 2017This day in weather historyWarnings in California, September 2017
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: 722957, 722828, 722827, 722958, 722829, 722831, 722830.