540 AM CDT FRI MAR 16 2012

Counties:  EMMET-PALO ALTO-POCAHONTAS-SAC-CALHOUN-CRAWFORD-CARROLL-AUDUBON-CASS-ADAMS-TAYLOR-  

DENSE FOG OVER PARTS OF WESTERN IOWA THIS MORNING:

FOG HAS DEVELOPED OVER MUCH OF WESTERN IOWA THIS MORNING AND IS
EXPECTED TO PERSIST THROUGH AT LEAST 900 AM. THE FOG WILL BE DENSE IN SPOTS AS WELL WITH VISIBILITIES DOWN TO A QUARTER MILE OR LESS. MOTORISTS SHOULD ALLOW FOR EXTRA TRAVEL TIME EARLY THIS MORNING AND DRIVE CAUTIOUSLY WITH INCREASED DISTANCE BETWEEN VEHICLES.