High pres over the Great Lakes will build across the area behind the front and move offshore late Thu. Low pres will approach the region from the W on Fri. Small Craft Advisory conditions are possible Fri. This is a dangerous line of storms. Boat handling becomes difficult in high winds, strong gusts, steep waves and heavy rain.
Boaters are vulnerable to lightning strikes.
Mariners should exercise caution. Move to protected waters. Avoid heading into the storm while seeking shelter. These storms have a history of large hail and damaging winds.