Saturday, July 26, 2014

Hazardous Weather Outlook for Mchenry Co., IL

FLUS43 KLOT 260901
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
401 AM CDT SAT JUL 26 2014


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-
401 AM CDT SAT JUL 26 2014 /501 AM EDT SAT JUL 26 2014/

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

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:

THUNDERSTORMS SOME OF WHICH MAY PRODUCE:
TORRENTIAL DOWNPOURS..LEADING TO LOCALIZED FLOODING.
FREQUENT CLOUD TO GROUND LIGHTNING.
LARGE HAIL UP TO HALF DOLLARS.
WIND GUSTS IN EXCESS OF 60 MPH.

AREAS AFFECTED AND TIMING:

ISOLATED THUNDERSTORMS ARE EXPECTED EARLY THIS MORNING
PRIMARILY SOUTH OF INTERSTATE 88. ADDITIONAL THUNDERSTORMS WILL
DEVELOP ALONG AND SOUTH OF INTERSTATE 80 THIS AFTERNOON WITH THE
HIGHEST COVERAGE THIS EVENING AND EARLY OVERNIGHT.

DISCUSSION:

ANY EARLY MORNING STORMS WILL DISSIPATE AND SHIFT EAST BY LATE
MORNING. A WARM FRONT WILL MOVE OVER THE SOUTHERN FORECAST AREA
THIS MORNING BRINGING IN WARM MOIST AIR. INSTABILITY WILL BE
MAXIMIZED ALONG AND SOUTH OF INTERSTATE 80 WITH ISOLATED
STORMS...POSSIBLY SUPERCELLS...POTENTIALLY DEVELOPING THIS
AFTERNOON AND EVENING. A LINE OR COMPLEX OF STORMS IS THEN
EXPECTED SOUTH OF INTERSTATE 80 THIS EVENING INTO EARLY OVERNIGHT.
HEAVY RAIN...LOCALIZED FLOODING...LARGE HAIL...AND DAMAGING WINDS
WILL BE THE MAIN THREATS. WHILE NOT THE MAIN THREAT...A TORNADO
CANNOT BE RULED OUT SOUTH OF A PONTIAC TO RENSSELAER LINE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THERE WILL BE ADDITIONAL PERIODIC CHANCES OF THUNDERSTORMS ACROSS
THE ENTIRE OUTLOOK AREA SUNDAY AND WEDNESDAY THROUGH FRIDAY.

HIGH WAVES ARE LIKELY TO LEAD TO DANGEROUS SWIMMING CONDITIONS
ALONG AREA BEACHES SUNDAY EVENING THROUGH MONDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS MAY BE NEEDED THIS AFTERNOON AND TONIGHT SOUTH OF
INTERSTATE 80.

&&

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