A frost advisory has been issued from 4am until 8am Thursday morning for the following counties in Iowa, Adair, Adams, Audubon, Calhoun, Carroll, Cass, Crawford, Emmet, Guthrie, Kossuth, Palo Alto, Pocahontas, Sac, Monona, Harrison, Shelby, Pottawattamie and Montgomery.

Temperatures will fall into the low to mid 30s by early morning and some light frost is possible. Any sensitive plants will need to be covered or brought indoors.