Chicago Weather O'Hare Forecast Thursday, April 9 2015 at 5:03:16 AM CT

NWS Forecast for: Amf Ohare IL
Issued by: National Weather Service Chicago, IL
Last Update: 4:15 am CDT Apr 9, 2015


Dense Fog Advisory BELOW
Hazardous Weather Outlook BELOW

Today: Showers and possibly a thunderstorm before 7am, then showers and thunderstorms likely after 7am. Some of the storms could be severe. Areas of fog before 7am. High near 73. Breezy, with a south wind 10 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tonight: Showers and thunderstorms likely, mainly before 11pm. Some of the storms could be severe. Mostly cloudy, with a low around 42. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: Mostly sunny, with a high near 57. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph.

Friday Night: Mostly clear, with a low around 35. West northwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.


Saturday: Sunny, with a high near 60. West wind around 5 mph.

Saturday Night: Mostly clear, with a low around 42.

Sunday: Partly sunny, with a high near 66.

Sunday Night: A chance of showers. Mostly cloudy, with a low around 53.

Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 64.

Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 49.

Tuesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 65.

Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 53.

Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 67.


Amf Ohare IL
41.98°N 87.9°W

Visit your local NWS office at: http://www.crh.noaa.gov/lot



Hazardous Weather Outlook
Issued by NWS Chicago, IL

000
FLUS43 KLOT 090945
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
445 AM CDT THU APR 9 2015

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
100945-
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-
445 AM CDT THU APR 9 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:

THUNDERSTORMS...SOME MAY BE SEVERE AND PRODUCE:

LOCALLY HEAVY RAINFALL RESULTING IN LOCALIZED FLOODING.
HAIL TO TWO INCHES IN DIAMETER.
WIND GUSTS TO 70 MPH.
FREQUENT CLOUD TO GROUND LIGHTNING.
ISOLATED TORNADOES.

AREAS AFFECTED AND TIMING:

SEVERAL CLUSTERS OF SCATTERED THUNDERSTORMS WILL LIKELY
AFFECT THE AREA AT TIMES THROUGH MIDDAY. SOME OF THESE STORMS
INITIALLY COULD PRODUCE LARGE HAIL. SEVERE THUNDERSTORMS WILL
LIKELY BECOME MORE NUMEROUS FROM MID AFTERNOON THROUGH EARLY
THIS EVENING...WITH DAMAGING WINDS...LARGE HAIL AND THE
POTENTIAL FOR TORNADOES MOST LIKELY DURING THE LATE AFTERNOON
AND EARLY EVENING HOURS. THE THREAT OF THUNDERSTORMS SHOULD
DECREASE QUICKLY WITH THE PASSAGE OF THE COLD FRONT THIS EVENING.

DISCUSSION:

SEVERAL CLUSTERS OF SCATTERED THUNDERSTORMS WERE ONGOING EARLY
THIS MORNING ACROSS THE MIDWEST...IN A REGION OF BROAD SOUTHWEST
FLOW ACROSS A NEARLY STATIONARY FRONTAL BOUNDARY WHICH STRETCHED
FROM SOUTHERN IOWA EAST ACROSS CENTRAL ILLINOIS AND INDIANA.
SCATTERED THUNDERSTORMS WILL LIKELY CONTINUE TO DEVELOP IN
CLUSTERS THROUGH EARLY AFTERNOON...PERIODICALLY AFFECTING PARTS
OF THE OUTLOOK AREA. THE STRONGEST OF THESE STORMS MAY HAVE THE
CAPABILITY OF PRODUCING LARGE HAIL THIS MORNING. THIS AFTERNOON
THE FRONT WILL LIFT NORTH AS A WARM FRONT AHEAD OF AN APPROACHING
AREA OF DEEP LOW PRESSURE. THE THREAT OF SEVERE WEATHER WILL
GENERALLY INCREASE DURING THE AFTERNOON AS A MORE UNSTABLE AIR
MASS SPREADS NORTH WITH THE WARM FRONT. IT IS SOMEWHAT UNCLEAR
HOW THE EFFECTS OF EARLIER STORMS WILL AFFECT STORM EVOLUTION
THIS AFTERNOON...BUT IT IS LIKELY THAT SEVERE THUNDERSTORMS WILL
DEVELOP AND BECOME ORGANIZED AHEAD OF THE COLD FRONT LATE THIS
AFTERNOON AND EARLY THIS EVENING...AND IT IS AT THIS TIME THAT
THE GREATEST THREAT OF DAMAGING WINDS...LARGE HAIL AND A FEW
TORNADOES WILL OCCUR. THE LOW PASS ACROSS WISCONSIN THIS
THIS EVENING...WITH THE TRAILING COLD FRONT PUSHING ACROSS THE
OUTLOOK AREA FROM WEST TO EAST AND EXITING BY MIDNIGHT. THE
THREAT OF THUNDERSTORMS AND SEVERE WEATHER WILL DECREASE
QUICKLY WITH THE PASSAGE OF THE FRONT.

IN ADDITION...DENSE FOG IS LIKELY THIS MORNING ACROSS NORTHEAST
ILLINOIS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY NIGHT...AND AGAIN
TUESDAY INTO WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON AND
THIS EVENING.

&&

$$

LMZ740>745-100945-
WINTHROP HARBOR TO WILMETTE HARBOR-
WILMETTE HARBOR TO NORTHERLY ISLAND-
NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY-
GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY-
445 AM CDT THU APR 9 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT.

DENSE FOG WILL CONTINUE THROUGH MID MORNING.

SCATTERED THUNDERSTORMS ARE LIKELY THROUGH THIS EVENING. SOME
THUNDERSTORMS MAY BE SEVERE LATE THIS AFTERNOON AND EARLY THIS
EVENING.

STRONG WINDS AND HIGH WAVES ARE EXPECTED TO DEVELOP BY THIS
EVENING...WHICH WILL BE HAZARDOUS FOR SMALL CRAFT. GALE FORCE
WINDS ARE LIKELY TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

GALE FORCE WINDS ARE LIKELY THROUGH MIDDAY FRIDAY...WITH
WINDS AND WAVES REMAINING HAZARDOUS FOR SMALL CRAFT THROUGH
FRIDAY EVENING.

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY NIGHT...AND AGAIN
TUESDAY INTO WEDNESDAY.

&&

$$

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-100945-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH
FOX ISLAND 5 NM OFFSHORE-
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
445 AM CDT THU APR 9 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT.

DENSE FOG WILL PERSIST ON THE SOUTHERN PART OF THE LAKE
THROUGH MIDDAY.

THUNDERSTORMS ARE LIKELY ACROSS MAINLY THE SOUTH HALF OF THE
LAKE INTO THIS EVENING. SOME STORMS COULD BE SEVERE.

GALE FORCE WINDS ARE LIKELY TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

GALE FORCE WINDS ARE LIKELY THROUGH MIDDAY THURSDAY ESPECIALLY
ON THE SOUTHERN PORTION OF THE LAKE.

THERE IS A CHANCE OF THUNDERSTORMS ON SOUTHERN LAKE MICHIGAN
SUNDAY NIGHT...AND AGAIN TUESDAY INTO WEDNESDAY.

&&

$$

RATZER



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