Moderate

Patchy areas of fog have begun to develop over southeastern GA and the SC Lowcountry and is expected to expand early this morning across the region. The fog may become locally dense, reducing visibilities on roadways. A Dense Fog Advisory may be needed for portions of the forecast area. If driving, slow down and leave extra distance ahead of you in case a sudden stop is needed.

* WHAT...Dangerous swimming conditions are expected due to high wave action and strong rip currents. * WHERE...Southern Schoolcraft County. * WHEN...From 8 AM EDT this morning through this evening. * IMPACTS...High wave action and dangerous currents will lead to life threatening swimming conditions. Waves in rapid succession can tire swimmers quickly. * ADDITIONAL DETAILS...Current related fatalities and rescues in the past have occurred due to similar wave conditions at locations listed below:

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Antelope, Boone, Cedar, Knox, Madison, Pierce, and Wayne Counties. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Buffalo, Hand, Hyde, Clark, Codington, Deuel, Hamlin, and Spink Counties. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Visibility down to one quarter mile in dense fog. * WHERE...Boyd and Holt Counties. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Visibility down to one quarter mile in dense fog. * WHERE...Custer, Blaine, Garfield, Loup, Wheeler, Frontier, Hayes, Lincoln, and Logan Counties. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...High wave action, strong currents, and dangerous swimming conditions expected. Piers may be heavily swamped by waves. * WHERE...Mason, Oceana and Muskegon counties. * WHEN...Through Thursday morning. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. Remain out of the water to avoid hazardous swimming conditions and do not venture out on piers. Please check with your local authorities on potential beach closures.

* WHAT...High wave action, strong currents, and dangerous swimming conditions expected. Piers may be heavily swamped by waves. * WHERE...Ottawa county. * WHEN...Through Thursday morning. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. Remain out of the water to avoid hazardous swimming conditions and do not venture out on piers. Please check with your local authorities on potential beach closures.

* WHAT...Visibility one quarter mile or less at times in dense fog. * WHERE...Portions of northwest Iowa, southwest Minnesota, northeast Nebraska, and east central, south central, and southeast South Dakota. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility or rapidly changing visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Dangerous swimming conditions from high waves and rip currents expected. Waves as high as 3 to 5 feet possible. * WHERE...Benzie, Manistee, Western Mackinac and Eastern Mackinac Counties, and Beaver Island and surrounding islands. * WHEN...From Wednesday morning through Wednesday evening. * IMPACTS...A high swim risk means that life-threatening waves and currents are expected. Stay out of the water and stay away from dangerous areas like piers and breakwalls. Remain out of the water to avoid hazardous swimming conditions.