Monday, August 18, 2014

Hazardous Weather Outlook for Mchenry Co., IL

FLUS43 KLOT 182027
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
327 PM CDT MON AUG 18 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-
327 PM CDT MON AUG 18 2014 /427 PM EDT MON AUG 18 2014/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

WEATHER HAZARDS EXPECTED:

SCATTERED THUNDERSTORMS...SOME COULD PRODUCE:
PEA TO DIME SIZE HAIL.
WIND GUSTS TO 50 MPH.
FREQUENT CLOUD TO GROUND LIGHTNING.
LOCALLY HEAVY RAINFALL.

AREAS AFFECTED AND TIMING:

THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS THROUGH LATE THIS
AFTERNOON ACROSS PORTIONS OF FAR NORTHERN ILLINOIS. CHANCES THEN
INCREASE THROUGH LATE THIS EVENING FOR AREAS NORTH OF INTERSTATE
80. THE STORMS THEN SPREAD SOUTH AND EAST AFTER MIDNIGHT ACROSS
THE REST OF THE OUTLOOK AREA.

DISCUSSION:

AN UPPER LEVEL DISTURBANCE OVER MINNESOTA WILL SHIFT EAST
TONIGHT AND REMAIN NORTH OF THE OUTLOOK AREA. HOWEVER...SHOWERS
AND STORMS WILL FORM OVER NORTHERN ILLINOIS EARLY THIS EVENING.
A SECOND PUSH OF STORMS WILL SPREAD NORTH OF INTERSTATE 80 THIS
EVENING. THE STORMS WILL THEN SHIFT SOUTH AND EAST AFTER
MIDNIGHT WITH A CHANCE OF STORMS ACROSS THE ENTIRE WARNING AREA
EARLY TUESDAY MORNING. ATMOSPHERIC MOISTURE WILL INCREASE
THROUGH TONIGHT WHICH WILL LEAD TO HEAVY DOWNPOURS. OTHER
HAZARDS WILL BE SMALL HAIL AND WIND GUSTS UP TO 50 MPH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE WILL CONTINUE TO BE PERIODIC CHANCES FOR THUNDERSTORMS
TUESDAY THROUGH SUNDAY. THE BEST CHANCE FOR THUNDERSTORMS WILL BE
TUESDAY...AND AGAIN WEDNESDAY NIGHT THROUGH THURSDAY NIGHT. HEAVY
RAINFALL COULD OCCUR WITH ANY THUNDERSTORMS THAT AFFECT THE AREA.
SMALL HAIL AND GUSTY WINDS MAY ACCOMPANY STRONGER STORMS TUESDAY
NIGHT THROUGH WEDNESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

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