National Weather Service United States Department of Commerce
Hazard Map Threat Levels Safety & Impact
Graphical Hazardous Weather Outlook
Dense Fog / Smoke Threat

Dense Fog & Smoke Safety Rules
 

If your car is equipped with fog lamps, turn them on.

Slow down before you enter a patch of fog.
Be sure that you can stop within the distance that you can see.
Turn on your wipers and defroster to remove moisture from the windshield.
Use your low-beam head-lamps whether it is day or night. (High beams reflect off the fog and can impede visibility.)
Use the right edge of the road or painted road markings as a guide.
Watch out for slow-moving and parked vehicles.
Do not change lanes or pass other vehicles unless absolutely necessary.
If you must pull off the road, signal first, then slowly and carefully pull off as far as possible.
After pulling off the road, turn on your hazard flashers.
Be on the lookout for sudden changes in visibility. The patchy nature of fog will lower visibility quickly especially if you are driving fast. Visibility may be lower near rivers and lakes. Be especially cautious in school zones and watch for children and the flashing lights of school busses.
Dense Fog & Smoke

fogWinter is the time of year when large parts of Florida can be blanketed with fog producing visibilities near zero. When this occurs the National Weather Service will issue a dense fog advisory.  Similar low visibility conditions can occur in very heavy rain or smoke.  Remember to follow these safety tips when driving in low visibility conditions.