* WHAT. Temperatures as low as 32 degrees will result in frost formation after midnight. * WHERE. A portion of Northern Lower Michigan. * WHEN. From 2 AM to 8 AM EDT Saturday. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* WHAT. Expect sustained winds up to 32 knots from the south with gusts up to 43 knots. The largest significant waves will be 13 feet with a potential maximum wave height of 19 feet. * WHERE. Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore and Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore. * WHEN. The maximum winds are expected around 3 AM EDT Sunday with the largest waves expected around 6 AM EDT Sunday. * IMPACTS. Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility.

* WHAT. Highest gusts up to 40 kts from the south and highest waves around 11 feet possible. * WHERE. 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island, Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary and Sturgeon Pt to Alabaster MI. * WHEN. From Saturday evening through Sunday morning. * IMPACTS. Strong winds can cause hazardous highest waves which could capsize or damage vessels and reduce visibility.

* WHAT. Temperatures as low as 34 will result in frost formation. * WHERE. A portion of Northern Lower Michigan. * WHEN. Until 8 AM EDT Saturday. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* WHAT. Temperatures as low as 32 degrees will result in frost formation. * WHERE. A portion of Northern Lower Michigan. * WHEN. Until 8 AM EDT this morning. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* WHAT. Highest gusts up to 40 kts from the south and highest waves around 11 feet expected. * WHERE. 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island, Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary and Sturgeon Pt to Alabaster MI. * WHEN. From 10 PM this evening to 10 AM EDT Sunday. * IMPACTS. Strong winds will cause hazardous highest waves which could capsize or damage vessels and reduce visibility.

* WHAT. Expect sustained winds up to 32 knots from the south with gusts up to 41 knots. The largest significant waves will be 13 feet with a potential maximum wave height of 19 feet. * WHERE. Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore and Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore. * WHEN. The maximum winds are expected around 4 AM EDT Sunday with the largest waves expected around 6 AM EDT Sunday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility.