Hillsborough

... Areas of dense fog will affect the Nature Coast and Tampa Bay area
until 900 am EST...

Areas of dense fog will affect the mentioned areas with significant
impacts to driving conditions along major interstates and highways.
Reports from around the area have indicated visibilities dropping
below half a mile over large areas with localized visibilities at
a quarter mile or less range.

The fog will reduce visibility to near zero in some areas. Motorists
should slow down... especially along Interstate 4... 75 and 275. Use
low beam headlights... or find an alternative Route. In
addition... motorists should be prepared for rapidly changing
visibility within the fog bank.