Following the departure of the upper trough that was responsible for the precipitation across much of the area on November 8 and 9, high pressure build into California on November 10 resulting in clear skies and light winds across the San Joaquin Valley. With abundant low level moisture and inversion conditions, areas of dense fog formed in the San Joaquin Valley east of Interstate 5 by sunrise…
Every event with a place to put it; 5 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.
Following the departure of the upper trough that was responsible for the precipitation across much of the area on November 8 and 9, high pressure build into California on November 10 resulting in clear skies and light winds across the San Joaquin Valley. With abundant low level moisture and inversion conditions, areas of dense fog formed in the San Joaquin Valley east of Interstate 5 by sunrise and persisted until late morning when it lifted into a low cloud deck before dissipating by early afternoon.
The national radar mosaic for the moment the first event began.
5 dense fog. Local standard time, as filed.
Visibility below a quarter mile was reported in Merced and Madera.
Visibility below a quarter mile was reported in Delano.
Visibility below a quarter mile was reported in Visalia and Porterville.
Visibility below a quarter mile was reported in Lemoore.
Visibility below a quarter mile was reported in Hanford.
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: 985134, 985136, 985138, 985135, 985137.