High pressure rebuilt into central California on November 17. Clear skies, light winds and inversion conditions over the San Joaquin Valley followed on the morning of November 18 and reduced visibility to below 500 feet across much of the valley north of Kern County.
Every event with a place to put it; 6 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 HNX wrote it up.
High pressure rebuilt into central California on November 17. Clear skies, light winds and inversion conditions over the San Joaquin Valley followed on the morning of November 18 and reduced visibility to below 500 feet across much of the valley north of Kern County. The dense fog fog resulted in several school districts either opening late or cancelling bus service. The fog lifted into a low cloud deck by late morning which dissipated by early afternoon.
The national radar mosaic for the moment the first event began.
6 dense fog. Local standard time, as filed.
Visibility below a quarter mile was reported in Hanford. Several school districts either opened late or delayed or cancelled bus service.
Visibility below a quarter mile was reported in Merced and Madera. Several school districts either opened late or delayed or cancelled bus service.
Several school districts either opened late or delayed or cancelled bus service.
Several school districts either opened late or delayed or cancelled bus service.
Visibility below a quarter mile was reported in Visalia. Several school districts either opened late or delayed or cancelled bus service.
Visibility below a quarter mile was reported in Fresno.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2021Every state in 2021This day in weather historyWarnings in California, November 2021
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: 985857, 985840, 985870, 985871, 985860, 985853.