* WHAT. Visibility one quarter mile or less in dense fog. * WHERE. Portions of East Arkansas, North Mississippi, Southeast Missouri, and West Tennessee. * WHEN. From 1 AM to 9 AM CDT Saturday. * IMPACTS. Low visibility could make driving conditions hazardous.

* WHAT. Visibility one quarter mile or less in dense fog. * WHERE. Portions of East Arkansas, North Mississippi, Southeast Missouri, and West Tennessee. * WHEN. Until 9 AM CDT this morning. * IMPACTS. Low visibility could make driving conditions hazardous.

* WHAT. Visibility as low as one quarter mile in dense fog. * WHERE. Portions of southern Illinois, western Kentucky, and southeast Missouri. * WHEN. From 1 AM to 9 AM CDT Saturday. * IMPACTS. Low visibility could make driving conditions hazardous.

The National Weather Service in Little Rock has issued a Flood Advisory for the following river in Arkansas. Black River At Black Rock affecting Lawrence, Jackson and Independence Counties. For the Black River. including Corning, Pocahontas, Black Rock. elevated river levels are forecast. * WHAT. Flooding caused by excessive rainfall is expected. * WHERE. Black River at Black Rock. * WHEN. From this morning to early Wednesday morning. * IMPACTS. At 14.0 feet, Minor flooding begins. Farm ground along east bank begins to flood. * ADDITIONAL DETAILS. - At 9:00 AM CDT Friday the stage was 12.2 feet. - Forecast. The river is expected to rise to a crest of 13.0 feet tomorrow morning (Saturday May 4). - Action stage is 12.0 feet. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood