Dense Fog, Foggy Bottom
- When
- February 23, 8:30 AM PST to 9:20 AM PST
- Where
- Foggy Bottom forecast zone
- Reported by
- ASOS
Visibility below a quarter mile was reported in Hanford.
Dense Fog in California, February 23, 2020
A low pressure system moved east across southern California on February 22 bringing light precipitation to the area. Although much of the San Joaquin Valley picked up only a trace to a few hundredths of an inch of rainfall while most of the Southern Sierra Nevada and adjacent foothills picked up between a tenth and a half inch of liquid precipitation, this was the first significant precipitation…
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
A low pressure system moved east across southern California on February 22 bringing light precipitation to the area. Although much of the San Joaquin Valley picked up only a trace to a few hundredths of an inch of rainfall while most of the Southern Sierra Nevada and adjacent foothills picked up between a tenth and a half inch of liquid precipitation, this was the first significant precipitation in the area in nearly a month. Skies cleared out during the morning of February 23 as the system moved to the east of the area. Patches of dense fog formed in the San Joaquin Valley around sunrise as clear skies and light winds prevailed. The fog completely dissipated by 1000 am.
Event by event
1 dense fog. Local standard time, as filed.
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
- Dust Storm in Washington, February 23, 2020
- Flash Flood in Arizona, February 23, 2020
- High Wind in Wyoming, February 23 to 24, 2020
- Damaging Winds in Texas, February 23 to 24, 2020
- High Wind in Texas, February 23 to 24, 2020
- High Wind in Oregon, February 23, 2020
- Winter Weather in Idaho, February 23, 2020
- Winter Weather in Montana, February 23, 2020
- Winter Weather in Colorado, February 23 to 25, 2020
- Heavy Rain in Kansas, February 23 to 24, 2020
- High Wind in Idaho, February 23, 2020
- High Wind in Montana, February 23 to 24, 2020
More
Every storm in California in 2020Every state in 2020This day in weather historyWarnings in California, February 2020
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 2026-10-01. Each event’s entry at NCEI: 869917.