...ARCTIC AIR MASS ARRIVES THIS EVENING...

.ARCTIC AIR WILL SPREAD INTO THE MIDWEST BY EARLY THIS EVENING.
AS THE ARCTIC AIR OVERSPREADS THE REGION...TEMPERATURES WILL
QUICKLY DROP INTO THE SINGLE DIGITS SHORTLY AFTER SUNSET...AND
WILL CONTINUE TO FALL OVERNIGHT. MUCH OF THE AREA WILL SEE LOW
TEMPERATURES NEAR OR BELOW ZERO. WITH WINDS OF 15 TO 25 MPH
EXPECTED TO PERSIST THROUGH THE NIGHT...WIND CHILL READINGS OF
20 TO 29 BELOW ZERO ARE EXPECTED. THE ADVISORY INCLUDES THE
URBANIZED AREAS OF THE CHICAGO AND ROCKFORD METRO AREAS...AS WELL
AS...THE MORE RURAL PORTIONS OF THE REGION.

A WIND CHILL ADVISORY REMAINS IN EFFECT FROM 9 PM CST /10 PM EST/
THIS EVENING TO 11 AM CST /NOON EST/ FRIDAY.

* TIMING...AN ARCTIC COLD FRONT WILL MOVE INTO THE AREA DURING
THE LATE AFTERNOON AND EARLY EVENING HOURS. GUSTY NORTHWEST
WINDS OF 15 TO 25 MPH WILL WILL ACCOMPANY THE FRONTAL
PASSAGE... AND WILL PERSIST THROUGH DAYBREAK FRIDAY.
TEMPERATURES WILL FALL QUICKLY DURING THE EVENING...AND WILL
BE NEAR OR BELOW ZERO BY THE PREDAWN HOURS OF FRIDAY MORNING.

* WIND CHILL VALUES...BETWEEN 20 AND 29 DEGREES BELOW ZERO LATE
TONIGHT AND EARLY FRIDAY.

* IMPACTS...WIND CHILL VALUES AT THIS LEVEL WILL CAUSE FROSTBITE
TO EXPOSED SKIN WITHIN 30 MINUTES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.
IF YOU MUST VENTURE OUTDOORS...MAKE SURE YOU WEAR A HAT AND
GLOVES.

BRING PETS INDOORS. PETS CAN SUFFER FROM FROST AND HYPOTHERMIA
SIMILAR TO THEIR HUMAN CAREGIVERS.