... Dense fog advisory now in effect until 7 am CDT this morning...
* visibility... dense fog continues to produce widespread low
visibilities of a quarter mile or less in the advisory area.
Some improvement is expected gradually toward sunrise as a weak
boundary bring drier air into central and southeast Iowa. In
the meantime... expected very low visibilities in the advisory
* Impacts... travel will be greatly impacted by the reduced
visibility and fog over portions of the area. Allow extra
travel time to reach your destination safely.
A dense fog advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving... slow down...
use low beam headlights... and leave plenty of distance ahead of
you. Use extreme caution when approaching intersections and
Railroad crossings as oncoming vehicles and trains may be hidden
by the dense fog.