Central Valley under Dense Fog Advisory on Friday
The National Weather Service (NWS) office in Hanford, California, has issued a dense fog advisory for several areas of the Central Valley, including Merced, Madera, Mendota, Planada, Le Grand, Snelling, Fresno, Clovis, Hanford, Corcoran, Lemoore, Visalia, Porterville, and Reedley.
The advisory is valid from 4 a.m. until 10 a.m. Friday. The alert warns that visibility may be reduced to a quarter mile or less, making driving conditions potentially dangerous.
“Visibility one quarter mile or less in dense fog.”
“Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.”
The NWS emphasizes taking extra caution or avoiding travel when possible during foggy conditions. Widespread dense fog can drastically reduce visibility and make travel unsafe.
Safety Tips for Driving in Fog
- Reduce speed and maintain a larger following distance.
- Use low-beam headlights or fog lights.
- Avoid sudden stops and lane changes.
- Use road markings to guide your path.
- Pull over safely if visibility drops too low.
Source: The National Weather Service
Originally published November 6, 2025, at 5:24 PM.
Author’s Summary
The NWS issued a dense fog advisory for California’s Central Valley, warning drivers of reduced visibility and urging caution during early Friday morning commutes.