* WHAT. Temperatures as low as 35 may result in patchy frost formation for the Arrowhead in northeast Minnesota. * WHERE. Central St. Louis, Cook and Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation and the Bois Forte Band, Lake Vermilion area. This also includes the Boundary Waters eastern and central area. * WHEN. From 1 AM to 9 AM CDT Thursday. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* WHAT. Temperatures as low as 34 will result in frost formation for parts of northwest and north central Wisconsin. * WHERE. Price, Ashland, Bayfield, Douglas, Iron, and Sawyer Counties. This includes the Tribal Lands of the Bad River Reservation, the Red Cliff Band, the northwestern area of the Lac du Flambeau Band and the Lac Courte Oreilles Reservation. Recreation spots such as Madeline Island and the Apostle Islands National Lakeshore. * WHEN. From 1 AM to 9 AM CDT Thursday. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.