Frost Advisory issued April 22 at 2:45PM CDT until April 23 at 9:00AM CDT by NWS

...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In Illinois, Clinton IL, Marion IL, Washington IL, Monroe IL, Randolph IL, and Saint Clair IL Counties. In Missouri, Saint Charles MO, Saint Louis City MO, Saint Louis MO, and Sainte Genevieve MO Counties.