Dense Fog — Merced and Madera, California

2020-12-18 · Merced and Madera, California

Event narrative

Madera reported visibility below a quarter mile.

Wider weather episode

High pressure built into California on the morning of December 18 which resulted in clearing skies and decreased winds across the area. With some residual low level moisture from the storm that moved through the area on the previous day, areas of dense fog formed overnight across portions of the eastern San Joaquin Valley as well as along the State Route 99 corridor from Madera to Visalia. The fog lifted into a low cloud deck by late morning.

Source: NOAA Storm Events Database, event_id 925614. Narrative written by the NWS forecast office that issued the report.