Driving in the Baltimore area could be extremely difficult this morning as fog is reducing visibility to one-half mile or less in some areas, the National Weather Service said.
A dense fog advisory remains in effect until 10 a.m. Thursday.
The National Weather Service cautions drivers to use low-beam headlights and give plenty of distance around other cars when driving in fog.
After the fog dissipates, it will become mostly cloudy, with Thursday's high near 72 and south winds around 6 mph. There is also a chance of rain before 10 a.m.
Thursday night is expected to be partly cloudy, with a low around 57 and light south winds.
Friday is expected to be mostly sunny, with a high near 79 and north winds at 7 mph becoming easterly.
Friday night is expected to be cloudy, with a low around 58 and east winds between 6 and 9 mph. There is a 40 percent chance of showers, mainly after 2 a.m.