At 3:58 a.m. on Wednesday, the National Weather Service released a dense fog advisory in effect until 10 a.m. for Somerset, Bedford, Perry, Dauphin, Lebanon, Cumberland, Adams, York and Lancaster counties.

The weather service says to anticipate, "Visibility one quarter mile or less in dense fog."

"Hazardous driving conditions due to reduced visibility," describes the weather service. "If driving, slow down, use your low-beam headlights, and leave plenty of distance ahead of you."

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 consi

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