* WHAT…Visibility one quarter mile or less in dense fog.
* WHERE…Much of central and east central Illinois, generally along
and east of a line from Galesburg to Springfield to Effingham.
* WHEN…Until 11 AM CST this morning.
* IMPACTS…Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS…The most widespread dense fog will be near
the I-74 corridor. In areas further south, from Springfield to
Effingham east, visibility will fluctuate between a quarter mile
and a few miles.