URGENT – WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
407 PM CDT TUE JUL 19 2011
LAKE IL-COOK-LAKE IN-PORTER-
INCLUDING THE CITIES OF…WAUKEGAN…CHICAGO…GARY…VALPARAISO
407 PM CDT TUE JUL 19 2011
…DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS
EVENING (Close to Lake Michigan)…
…EXCESSIVE HEAT WARNING IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM
CDT FRIDAY…
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED AN EXCESSIVE
HEAT WARNING…WHICH IS IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM CDT
FRIDAY. THE EXCESSIVE HEAT WATCH IS NO LONGER IN EFFECT. A DENSE
FOG ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING.
* TEMPS AND HEAT INDEX…HIGH TEMPERATURES IN THE MIDDLE TO
PERHAPS UPPER 90S WILL COMBINE WITH OPPRESSIVE HUMIDITY VALUES
TO RESULT IN DANGEROUS HIGH HEAT INDICES OF 105 TO 115 DEGREES
BOTH WEDNESDAY AND THURSDAY AFTERNOON. LITTLE RELIEF IS EXPECTED
FROM THE HEAT WEDNESDAY NIGHT…ESPECIALLY IN THE CITY OF
CHICAGO WHERE LOWS WILL BE IN THE LOWER 80S WITH NIGHT TIME HEAT
INDEX READINGS LIKELY TO REMAIN ABOVE 90 DEGREES THROUGH THE
NIGHT.
* TIMING OF DENSE FOG ADVISORY WILL BE THROUGH THIS EVENING WITH
VISIBILITY OF A QUARTER MILE OR LESS EXPECTED FOR AREAS ALONG
THE SHORE OF LAKE MICHIGAN…ESPECIALLY ALONG THE INDIANA SHORE
EAST OF GARY. VISIBILITY WILL IMPROVE RAPIDLY INLAND…WITH MANY
AREAS NOT SEEING DENSE FOG EVEN A HALF MILE OR LESS INLAND.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
TAKE EXTRA PRECAUTIONS…IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE…RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE AND DRINK PLENTY OF WATER.
TO REDUCE RISK DURING OUTDOOR WORK…THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY
HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE
IS AN EMERGENCY…CALL 9 1 1. IF YOU ARE IN THE CITY OF
CHICAGO…CALL THE CITYS 24 HOUR 3 1 1 HEAT EMERGENCY NUMBER.
AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF
DANGEROUSLY HOT TEMPERATURES WILL OCCUR. THE COMBINATION OF HOT
TEMPERATURES AND HIGH HUMIDITY WILL CREATE A DANGEROUS SITUATION
IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS…STAY
IN AN AIR-CONDITIONED ROOM…STAY OUT OF THE SUN…AND CHECK UP
ON RELATIVES AND NEIGHBORS.
HIGHS FORECAST FOR TOMORROW — WEDNESDAY JULY 20, 2011
Arlington Heights forecast high of 96°F at 4:00 p.m.
Other Cities (Highs for Wednesday July 20, 2011)
Champaign … High 95°F
Chicago … High 99°F
Cicero … High 97°F
DeKalb … High 94°F
Elk Grove Village … High 96°F
Evanston … High 96°F
Gary, IN … High 96°F
Joliet … High 95°F
Niles … High 97°F
Park Ridge … 97°F
Peoria … High 96°F
Rockford … High 96°F
Streator … High 95°F
St. Louis, MO … High 101°F
Wheaton … High 97°F
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING…SLOW DOWN…
USE YOUR HEADLIGHTS…AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.
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