A dense fog advisory is in effect for parts of South Florida until 9 a.m. Friday.
A heavy fog cover is moving from interior portions of the region to metro areas, according to the National Weather Service in Miami-Dade. Visibility could be cut to a quarter-mile or less.
"Keep your distance," CBS4 traffic reporter Vanessa Borge said.
Friday's forecast calls for a 40 percent chance of rain and highs around 80. Overnight lows will be around 70.
And the fog is expected to return overnight into Saturday.
See photos here.