Freeze Watch issued October 16 at 2:44AM CDT until October 18 at 9:00AM CDT by NWS

...FREEZE WATCH IN EFFECT FROM MONDAY EVENING THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 22 possible. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri.