California, 2019Dense Fog in California, December 9 to 10, 2019
December 9 to 10, 2019 · NWS HNX · 10 events in 10 counties and zones
High pressure continued to strengthen over the area on December 10 resulting in the redevelopment of fog in the San Joaquin Valley during the early morning hours with several locations reporting visibility below a quarter of a mile. The fog resulted in several school districts in the valley either opening late or delaying bus service, and traffic being paced by law enforcement on some expressways.
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 10
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.
High pressure continued to strengthen over the area on December 10 resulting in the redevelopment of fog in the San Joaquin Valley during the early morning hours with several locations reporting visibility below a quarter of a mile. The fog resulted in several school districts in the valley either opening late or delaying bus service, and traffic being paced by law enforcement on some expressways. The fog lifted into a low stratus deck by late morning with noticeable improvement in visibility taking place.
Dense Fog, Foggy Bottom
- When
- December 9, 11:45 PM PST to December 10, 9:30 AM PST
- Where
- Foggy Bottom forecast zone
- Reported by
- ASOS
Visibility below a quarter mile was reported in Hanford. Several school districts had delayed openings or delayed bus service due to fog. California Highway Patrol was pacing traffic on SR 198 between 10th Ave. and 18th Ave. due to low visibility.
Dense Fog, Fresno
- When
- December 9, 11:55 PM PST to December 10, 10:15 AM PST
- Where
- Fresno forecast zone
- Reported by
- ASOS
Visibility below a quarter mile was reported in Fresno and Reedley. Several school districts had delayed openings or delayed bus service due to fog.
Dense Fog, Eastern Kern County
- When
- December 10, 2:15 AM PST to 9:15 AM PST
- Where
- Eastern Kern County forecast zone
- Reported by
- AWOS
Visibility below a quarter mile was reported in Delano. California Highway Patrol reported visibility between 600 and 1000 feet between Delano and Famoso on SR 99.
Dense Fog, Tulare County
- When
- December 10, 2:25 AM PST to 9:00 AM PST
- Where
- Tulare County forecast zone
- Reported by
- AWOS
Visibility below a quarter mile was reported in Visalia and Porterville. Several school districts had delayed openings or delayed bus service due to fog. California Highway Patrol was pacing traffic on SR 99 between Tipton and Delano due to low visibility.
Dense Fog, Bakersfield
- When
- December 10, 2:25 AM PST to 9:00 AM PST
- Where
- Bakersfield forecast zone
- Reported by
- ASOS
Visibility below a quarter mile was reported in Bakersfield. California Highway Patrol reported visibility between 500 and 600 feet in south Bakersfield.
Dense Fog, Western San Joaquin Valley
- When
- December 10, 3:48 AM PST to 10:13 AM PST
- Where
- Western San Joaquin Valley forecast zone
- Reported by
- ASOS
Visibility below a quarter mile was reported in Lemoore. Several school districts had delayed openings or delayed bus service due to fog.
Dense Fog, Southern Kings County
- When
- December 10, 5:00 AM PST to 9:00 AM PST
- Where
- Southern Kings County forecast zone
- Reported by
- Broadcast Media
Several school districts had delayed openings or delayed bus service due to fog.
Dense Fog, Western Kern County
- When
- December 10, 5:00 AM PST to 9:00 AM PST
- Where
- Western Kern County forecast zone
- Reported by
- Broadcast Media
Several school districts had delayed openings or delayed bus service due to fog.
Dense Fog, Merced and Madera
- When
- December 10, 6:30 AM PST to 11:00 AM PST
- Where
- Merced and Madera forecast zone
- Reported by
- ASOS
Visibility below a quarter mile was reported in Merced and Madera. Several school districts had delayed openings or delayed bus service due to fog.
Dense Fog, San Joaquin Confluence
- When
- December 10, 6:30 AM PST to 10:00 AM PST
- Where
- San Joaquin Confluence forecast zone
- Reported by
- Broadcast Media
Several school districts had delayed openings or delayed bus service due to fog.
- Dense Fog
- Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Flood and High Wind in Alaska, December 9 to 10, 2019$1.0 million · 98 kt wind · 3 events
- Heavy Rain in Arizona, December 9, 2019$20,000 · 1 event
- Hail in Arizona, December 9, 20191 in hail · 8 events
- Heavy Snow in Wisconsin, December 9 to 10, 20197 events
- Winter Storm and Winter Weather in Michigan, December 9 to 10, 20195 events
- Winter Weather in Iowa, December 9, 20193 events
- Winter Weather in Wisconsin, December 9, 20192 events
- Winter Storm in Minnesota, December 9, 20191 event
- High Wind in Nebraska, December 9, 201951 kt wind · 1 event
- Dense Fog in Colorado, December 9, 20191 event
- High Wind in Maine, December 9 to 10, 201952 kt wind · 1 event
- Blizzard in Alaska, December 9 to 15, 20191 event
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: 859925, 859926, 859931, 859928, 859932, 859923, 859929, 859930, 859920, 859922.