Arctic Air !

/O.CON.KLOT.WC.Y.0002.080119T0600Z- 080120T1800Z/ WINNEBAGO-BOONE-MCHENRY- LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY- WILL-KANKAKEE-LIVINGSTON- IROQUOIS- FORD-LAKE INDIANA-PORTER-NEWTON-JASPER- BENTON- INCLUDING THE CITIES OF... ROCKFORD...WOODSTOCK...WAUKEGAN... OREGON...DIXON...DEKALB...AURORA... CHICAGO...OTTAWA...OSWEGO... MORRIS... JOLIET...KANKAKEE...PONTIAC... WATSEKA...PAXTON...GARY... VALPARAISO...MOROCCO...RENSSELAER... FOWLER 508 PM CST THU JAN 17 2008 /608 PM EST THU JAN 17 2008/
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT CST /1 AM EST/ FRIDAY NIGHT TO 12 PM CST /1 PM EST/ SUNDAY...

A WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT CST /1 AM EST/ FRIDAY NIGHT TO 12 PM CST /1 PM EST/ SUNDAY.

A VERY COLD ARCTIC AIRMASS WITH TEMPERATURES DROPPING AS LOW AS 10 BELOW ZERO COMBINED WITH STRONG... GUSTY WINDS WILL CAUSE WIDESPREAD WIND CHILLS LESS THAN 20 DEGREES BELOW ZERO.

A WIND CHILL ADVISORY MEANS THAT VERY COLD AIR AND STRONG WINDS WILL COMBINE TO GENERATE LOW WIND CHILLS. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA IF PRECAUTIONS ARE NOT TAKEN.

En gros, ça veut dire : ça  caille !!!!!! 

(pour info, -20 F = -29 C)