If driving, slow down, use your low-beam headlights, and leave plenty of distance ahead of you. For dense fog safety information, visit weather.gov/fog. The latest forecast information can be found on the NWS State College Facebook page and Twitter @NWSStateCollege, or on the web at weather.gov/ctp.

DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EST THURSDAY... * WHAT...Visibility one quarter to one half mile in dense fog. * WHERE...Dauphin, Schuylkill, Lebanon, York and Lancaster Counties. * WHEN...Until 9 AM EST Thursday. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...The fog may improve at least some overnight as additional rain arrives.