The National Weather Service issued a dense fog advisory Thursday morning for all of southwest and west central Florida, including the entire Tampa Bay area. The advisory was in effect until 9 a.m.
Reports of heavy fog prompted public safety officials to urge caution on the roads, especially highways, interstates and major bridges. Visibility in some areas was reduced to less than half a mile. Drivers were urged to slow down and use low-beam headlights as the fog persisted.
Conditions were expected to clear up in the late morning, though increasing clouds and winds would remain ahead of a cold front that was expected to move in Thursday afternoon.
"Today's rain chances will increase ahead of the approaching cold front," said Bay News 9 meteorologist Juli Marquez. "And we can't rule out storms Thursday ahead of the cold front."
Rain chances Thursday afternoon would reach 70 percent, Marquez said. Temperatures were expected to drop overnight, with highs Friday in the 50s.