Dense Fog — Foggy Bottom, California

2021-01-07 · Foggy Bottom, California

Event narrative

Hanford reported visibility below a quarter mile. At 0430 PST, California Highway Patrol reported visibility between 200 and 500 feet on SR 198 and 4th Ave east of Hanford and was pacing traffic between Hanford and Visalia.

Wider weather episode

A short wave trough pushed through central California during the evening of January 6, but skies cleared out and winds diminished behind it as high pressure built back into the area overnight. An area of dense fog formed from Turlock to Delano overnight as a result of clear skies, light winds and inversion conditions over the San Joaquin Valley. The fog dissipated by late morning from Fresno southward and lifted into a low cloud deck north of Fresno which persisted for much of the day.

Source: NOAA Storm Events Database, event_id 928009. Narrative written by the NWS forecast office that issued the report.