Dense Fog, Sw Sj Valley
- When
- December 18, 7:21 PM PST to December 19, 8:53 AM PST
- Where
- Sw Sj Valley forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
Dense Fog in California, December 18 to 19, 2001
Particularly dense and early-forming fog was noted on the evening of the 18th through much of the morning of the 19th. Visibilities were less than 1/4 mile throughout the Central and Southern San Joaquin Valley.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 4
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.
What happened
The episode as NWS HNX wrote it up.
Particularly dense and early-forming fog was noted on the evening of the 18th through much of the morning of the 19th. Visibilities were less than 1/4 mile throughout the Central and Southern San Joaquin Valley.
Event by event
4 dense fog. Local standard time, as filed.
Dense Fog, Se Sj Valley
- When
- December 18, 8:35 PM PST to December 19, 11:35 AM PST
- Where
- Se Sj Valley forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
Dense Fog, E Central Sj Valley
- When
- December 18, 10:56 PM PST to December 19, 10:28 AM PST
- Where
- E Central Sj Valley forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
Dense Fog, W Central Sj Valley
- When
- December 19, 1:53 AM PST to 10:00 AM PST
- Where
- W Central Sj Valley forecast zone
- Reported by
- AWOS,ASOS,MESONET,ETC
What these are
- 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.
The same day elsewhere
- Flooding in Indiana, December 18 to 27, 2001
- Dense Fog in Kentucky, December 18, 2001
- Flooding in Illinois, December 18 to 24, 2001
- Heavy Snow in Idaho, December 18 to 19, 2001
- Dense Fog in California, December 18, 2001
- Heavy Snow in Idaho, December 18 to 19, 2001
- Heavy Snow in Alaska, December 18, 2001
- Flood in Indiana, December 18 to 31, 2001
- High Wind in North Carolina, December 18, 2001
- Marine Thunderstorm Wind in North Atlantic Coastal Waters, December 18, 2001
- High Wind in New Jersey, December 18, 2001
- Marine Thunderstorm Wind in North Atlantic Coastal Waters, December 18, 2001
More
Every storm in California in 2001Every state in 2001This day in weather historyWarnings in California, December 2001
Sources
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: 5275620, 5275621, 5275619, 5275618.