The combination of clear skies, light wind, and colder than normal temperatures will produce frost (and possibly some freezing temperatures) across northern and central parts of Wisconsin early this morning. The threat area goes from the Mississippi and St.Croix Rivers to Lake Michigan.
Frost Advisories are in effect this morning. Freeze Warnings are in effect for parts of northeastern Wisconsin.
The map (right) shows predicted lows tonight. (Click on image to enlarge)
The average last freeze at La Crosse, WI is April 27th, but the latest ever was May 27, 1971.