Saturday, August 15, 2015

Hazardous Weather Outlook for Mchenry Co., IL

FLUS43 KLOT 152025
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
325 PM CDT SAT AUG 15 2015


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-
325 PM CDT SAT AUG 15 2015

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

.DAY ONE...TONIGHT.

WEATHER HAZARDS EXPECTED:

SCATTERED THUNDERSTORMS...THE STRONGEST OF WHICH MAY PRODUCE:

WIND GUSTS TO 40 TO 50 MPH.
HAIL UP TO DIME SIZE.
HEAVY DOWNPOURS.
FREQUENT LIGHTNING.

AREAS AFFECTED AND TIMING:

MUCH OF NORTHERN ILLINOIS AND NORTHWEST INDIANA THROUGH THE EARLY
EVENING HOURS.

DISCUSSION:

ISOLATED TO SCATTERED THUNDERSTORMS HAVE FORMED DUE TO A
LINGERING WEAK FRONTAL BOUNDARY...LAKE BREEZE MOVING INLAND AND
WEAK UPPER LEVEL DISTURBANCE. WEAK DEEP LAYER WIND SHEAR WILL
LIMIT THE INTENSITY OF THE THUNDERSTORMS SOMEWHAT...WITH
ISOLATED STRONG STORMS CAPABLE OF PRODUCING GUSTY WINDS AND SMALL
HAIL...AS WELL AS HEAVY DOWNPOURS AND FREQUENT LIGHTNING. A
MARGINALLY SEVERE THUNDERSTORM CANNOT BE COMPLETELY RULED OUT IN
A LONGER LASTING UPDRAFT. THUNDERSTORMS SHOULD QUICKLY DIMINISH
IN COVERAGE AND INTENSITY BY ABOUT SUNSET THIS EVENING.


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

HOT AND HUMID WEATHER IS EXPECTED ON SUNDAY...WITH MAXIMUM HEAT
INDEX VALUES UP TO 100 DEGREES.

PERIODS OF THUNDERSTORMS ARE LIKELY MONDAY AFTERNOON INTO THURSDAY.

THERE MAY BE ANOTHER CHANCE FOR THUNDERSTORMS NEXT SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

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