Up to 18-foot-tall waves 5 miles or more off shore and nearly 10-footers near shore are expected on Lake Michigan on Friday, Feb. 10. The National Weather Service issued a gale warning for Lake Michigan. he gale warning is set to run from 10 a.m. to 7 p.m. Friday. The warning area covers all of the off-shore area of Lake Michigan. Gale-force winds up to 46 mph out of the south are expected during the gale.