...PATCHY FROST POSSIBLE TONIGHT...
AN UNSEASONABLY STRONG AND COOL AREA OF HIGH PRESSURE WILL SPREAD
ACROSS THE MID AND UPPER MISSISSIPPI VALLEY TONIGHT. THE
COMBINATION OF CLEAR SKIES AND LIGHT WINDS ASSOCIATED WITH THE
HIGH WILL ALLOW TEMPERATURES TO DROP INTO THE MIDDLE TO UPPER 30S
ACROSS PORTIONS OF NORTHERN ILLINOIS OVERNIGHT. SOME PATCHY FROST
IS POSSIBLE IN SOME OF THE COLDER MORE SHELTERED LOCATIONS BY
SUNRISE FRIDAY...ESPECIALLY IN LOW LYING AREAS. ALTHOUGH WIDESPREAD
FROST IS NOT EXPECTED...ANY FROST THAT DOES FORM COULD RESULT IN
DAMAGE TO SENSITIVE VEGETATION IF LEFT UNPROTECTED. TEMPERATURES
WILL QUICKLY WARM AFTER SUNRISE ON FRIDAY...ENDING THE THREAT
