A dense fog advisory is in effect for Lehigh and Northampton counties until 9 a.m. Friday, with reduced visibility creating potential travel challenges for morning commuters.

Temperatures will rise into the upper 70s to low 80s, with some high clouds and generally dry conditions expected throughout the day.

The National Weather Service warns travelers to exercise caution during the morning hours due to dense fog. Visibility may be significantly reduced, requiring slower driving speeds and increased awareness. By mid-morning, fog is expected to dissipate, transitioning to partly cloudy skies with west to northwest winds around 5-10 mph.

Friday night will remain mostly dry with calm winds and temperatures cooling into the upper 50s. Some patchy, shallow fog may develop, especially in

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