UPDATE: Freeze Warning was first announced at 8:45 a.m., extended at 4:13 a.m. and expired by 7:15 a.m. No freeze in Arlington Heights. No freeze at O’Hare International Airport. No freeze at Midway. Freeze occurred in Rockford.
The relevant lows for Chicago Executive Airport:
41.0°F at 12:52 a.m.
39.0°F at 01:52 a.m.
37.9°F at 02:52 a.m.
37.0°F at 03:52 a.m.
36.0°F at 04:52 a.m.
35.1°F at 05:52 a.m.
The relevant lows for Chicago O’Hare Internationl Airport:
39.9°F at 12:51 a.m.
39.0°F at 01:51 a.m.
37.9°F at 02:51 a.m.
37.0°F at 03:51 a.m.
36.0°F at 04:51 a.m.
36.0°F at 05:51 a.m.
35.1°F at 06:51 a.m.
The relevant lows for Chicago Rockford Internationl Airport:
39.0°F at 12:54 a.m.
37.0°F at 01:54 a.m.
36.0°F at 02:54 a.m.
34.0°F at 03:54 a.m.
34.0°F at 04:54 a.m.
32.0°F at 05:54 a.m.
32.0°F at 06:54 a.m.
Saturday/Sunday overnight lows for Arlington Heights are forecast near freezing:
36 at 12:00 a.m.
36 at 01:00 a.m.
35 at 02:00 a.m.
35 at 03:00 a.m.
34 at 04:00 a.m.
34 at 05:00 a.m.
34 at 06:00 a.m.
34 at 07:00 a.m.
35 at 08:00 a.m.
39 at 09:00 a.m.
URGENT – WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
413 AM CDT SAT OCT 6 2012
WINNEBAGO-BOONE-MCHENRY-OGLE-LEE-DE KALB-KANE-LA SALLE-KENDALL-
GRUNDY-WILL-KANKAKEE-LIVINGSTON-
INCLUDING THE CITIES OF…ROCKFORD…BELVIDERE…WOODSTOCK…
OREGON…DIXON…DEKALB…AURORA…OTTAWA…OSWEGO…MORRIS…
JOLIET…KANKAKEE…PONTIAC
413 AM CDT SAT OCT 6 2012
…FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING…
* TEMPERATURE…IN THE UPPER 20S AND LOWER 30S DURING THE PREDAWN
AND EARLY MORNING HOURS.
* IMPACTS…SENSITIVE OUTDOOR VEGETATION WILL BE AT RISK. TAKE
THE NECESSARY PRECAUTIONS TO PROTECT YOUR SENSITIVE PLANTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.
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