Dense fog that began on the evening of January 31st lingered into the morning hours on February 1st. Areas of of dense fog were limited to the coastal areas, and resulted in delays at local airports.
Every event with a place to put it; 2 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.
Dense fog that began on the evening of January 31st lingered into the morning hours on February 1st. Areas of of dense fog were limited to the coastal areas, and resulted in delays at local airports.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before the first event at Jan 31, 9:09 PM PST, 2 hours 51 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 dense fog. Local standard time, as filed.
Areas of dense fog with visibility of 1/4 mile or less were reported along the coast between 0000 and 0900PST. The greatest impacts were felt at San Diego International Airport, were numerous flights were delayed or canceled.
Areas of dense fog developed around 0500PST and continued through 0700PST. Visibility of 1/4 mile or less was reported at John Wayne Airport and Los Alamitos U.S. Army Airfield.
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, February 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 2026-09-30. Each event’s entry at NCEI: 680808, 680807.