Special Weather Statement issued February 22 at 5:54AM CST by NWS

...SIGNIFICANT WEATHER ADVISORY FOR PATCHY DENSE FOG ACROSS MARSHALL...DEKALB... AND CULLMAN COUNTIES... PATCHY DENSE FOG HAS DEVELOPED ACROSS PORTIONS OF MARSHALL... DEKALB... AND CULLMAN COUNTIES... WITH VISIBILITIES DROPPING TO 1/4 MILE OR LESS IN ISOLATED AREAS. MOTORISTS ARE URGED TO DRIVE WITH EXTREME CAUTION...AS VISIBILITIES

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/1T1fhhL