* WHAT...Visibility less than one quarter mile in areas of dense fog.

* WHERE...Portions of central, north central, northeast, south
central, southwest, and west central Iowa.

* WHEN...Until 8 AM CDT this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.
Visibility will change rapidly across the region while driving.
Be prepared for pockets of dense fog and be especially cautious
around sunrise.

* ADDITIONAL DETAILS...The fog will begin to dissipate between 7 and
8 AM CDT this morning.

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.  Be especially cautious at intersections and
railroad crossings as vehicles and trains may be hidden by the fog.

Fog is developing over the region. River valleys and low lying
areas are seeing the thickest fog at this time. Over the next
several hours, fog is expected to become more widespread.
Visibility will range from a few miles and quickly change to 1/4
mile or less. If traveling early today through the morning
commute, use caution. Allow extra time to reach your destination
safely; use low beam headlights and be extra cautious at
intersections and railroad crossings if visibility is low. The fog
should begin lifting and conditions improving after 7 to 8 am
this morning.