Freeze Warning issued December 19 at 6:49PM CST until December 20 at 8:00AM CST by NWS

...COLD HIGH PRESSURE WILL LEAD TO SOME FROST AND FREEZE CONDITIONS TONIGHT ACROSS THE AREA... ...FREEZE WARNING NOW IN EFFECT FROM 3 AM EST /2 AM CST/ TO 9 AM EST /8 AM CST/ SUNDAY... * LOW TEMPERATURES: 29 TO 32 DEGREES. * DURATION: 2 TO 5 HOURS BELOW FREEZING.

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/22h4N04