* WHAT. Temperatures as low as 30 will result in frost formation. * WHERE. In Minnesota, Koochiching, Carlton and South St. Louis, Central St. Louis, North St. Louis, Northern Cook and Lake, Southern Cook, and Southern Lake Counties. In Wisconsin, Price, Ashland, Bayfield, Douglas, Iron, and Sawyer Counties. This includes the Tribal Lands of the Bad River Reservation, the Grand Portage Reservation, the Red Cliff Band, the Lac Courte Oreilles Reservation, the northwestern area of the Lac du Flambeau Band, the Fond du Lac Band and the Bois Forte Band, Lake Vermilion and, Nett Lake areas. Recreation spots such as Madeline Island, Voyageurs National Park and the Apostle Islands National Lakeshore. The entire Boundary Waters is also included. * WHEN. From midnight tonight to 9 AM CDT Tuesday. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* WHAT. Temperatures as low as 35 will result in frost formation. * WHERE. In Minnesota, Koochiching, Carlton and South St. Louis, Central St. Louis, North St. Louis, Northern Cook and Lake, Southern Cook, and Southern Lake Counties. In Wisconsin, Price, Ashland, Bayfield, Douglas, Iron, and Sawyer Counties. This includes the Tribal Lands of the Red Cliff Band, the Grand Portage Reservation, the Fond du Lac Band, the Lac Courte Oreilles Reservation, the Bad River Reservation, the northwestern area of the Lac du Flambeau Band and the Bois Forte Band, Lake Vermilion and, Nett Lake areas. Recreation spots such as the Apostle Islands National Lakeshore, Voyageurs National Park and Madeline Island. The entire Boundary Waters is also included. * WHEN. Until 9 AM CDT Tuesday. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.