Frost Advisory

If you have any sensitive vegetation outside, you might want to cover it or bring it into the house tonight as a frost advisory is in effect for Stephenson county and the counties bordering the Mississippi River from 4am 'til 9am. For Winnebago, Boone, DeKalb, Lee, Ogle, and McHenry counties, the frost advisory is in effect from 3am 'til 9am. Frost is also likely for most of our Wisconsin viewers. The NWS offices in Wisconsin haven't issued an advisory for Green and Rock counties. This is probably because freezing temperatures are still common enough in those areas at this time of year that an advisory isn't needed.