The National Weather Service issued a dense fog advisory at 6:14 a.m. on Sunday in effect until 10 a.m. for Warren, McKean, Elk, Cameron and Clearfield counties.

The weather service states to expect, "Visibility less than a quarter mile in dense fog."

"Hazardous driving conditions due to reduced visibility," says the weather service. "Consider allowing extra time to reach your destination."

Guidance from the weather service for navigating foggy conditions

When a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility can plummet to a quarter-mile or less. These conditions pose challenges for travel, so exercise extra caution on the road or consider postponing your trip if possible.

If you must venture out in foggy conditions, keep th

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