Patchy frost after 1am. Otherwise, mostly clear, with a low around 38. North northwest wind around 5 mph.
Lowest temperatures are expected between 3:00 a.m. and 7:30 a.m. Monday
Frost Advisory
URGENT – WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
927 PM CDT SUN OCT 3 2010
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
LAKE IN-PORTER-NEWTON-JASPER-BENTON-
INCLUDING THE CITIES OF … ARLINGTON HEIGHTS…ROCKFORD…BELVIDERE…WOODSTOCK…
WAUKEGAN…OREGON…DIXON…DEKALB…AURORA…WHEATON…CHICAGO…
OTTAWA…OSWEGO…MORRIS…JOLIET…KANKAKEE…PONTIAC…
WATSEKA…PAXTON…GARY…VALPARAISO…MOROCCO…RENSSELAER…
FOWLER
927 PM CDT SUN OCT 3 2010 /1027 PM EDT SUN OCT 3 2010/
…FROST ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT /8 AM EDT/
MONDAY…
A FROST ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT /8 AM EDT/
MONDAY.
* TEMPERATURES…LOWS WILL BOTTOM OUT IN THE MID AND UPPER 30S
WITH SOME OF THE TYPICALLY VALLEY AND LOW LYING AREAS DROPPING
INTO THE LOWER 30S. TEMPERATURES IN THE CORE OF CHICAGO AS WELL
AS ADJACENT TO LAKE MICHIGAN WILL NOT GET BELOW THE LOWER 40S
AND FROST WILL NOT OCCUR IN THESE AREAS.
* IMPACTS…FROST WILL DAMAGE OR KILL ANY TENDER VEGETATION.
OFFICIAL AIR TEMPERATURES ARE MEASURED AT 2 METERS ABOVE THE
GROUND…SO TEMPERATURES AT THE ACTUAL SURFACE LEVEL WILL LIKELY
BE A FEW TO SEVERAL DEGREES COLDER ALLOWING FROST TO FORM.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
A FROST ADVISORY MEANS THAT FROST IS LIKELY. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.