Monday, August 17, 2015

Hazardous Weather Outlook for Mchenry Co., IL

FLUS43 KLOT 171652
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1152 AM CDT MON AUG 17 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-
1152 AM CDT MON AUG 17 2015

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

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:

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

WIND GUSTS OF 50-60 MPH
FREQUENT LIGHTNING
HEAVY DOWNPOURS

AREAS AFFECTED AND TIMING:

MUCH OF NORTHERN ILLINOIS AND NORTHWEST INDIANA THIS AFTERNOON
AND EVENING.

DISCUSSION:

THE OUTLOOK AREA WILL BE POSITIONED BETWEEN AN UPPER LEVEL
TROUGH MOVING NORTH-NORTHEAST FROM THE LOWER OHIO RIVER VALLEY
AND A COLD FRONT SLOWLY APPROACHING FROM THE NORTHWEST. FORCING
FROM THESE FEATURES WILL COMBINE WITH AN UNSTABLE AIRMASS TO
GENERATE SCATTERED THUNDERSTORMS THIS AFTERNOON. A MORE
CONCENTRATED AREA OF THUNDERSTORMS IS EXPECTED TO MOVE INTO
NORTH- CENTRAL ILLINOIS LATE THIS AFTERNOON OR EARLY THIS
EVENING AS THE COLD FRONT ARRIVES. THIS ACTIVITY WILL MOVE
EASTWARD THROUGH THE EVENING BUT LIKELY DIMINISH IN COVERAGE AND
INTENSITY WITH TIME.

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

THERE ARE PERIODIC CHANCES FOR THUNDERSTORMS TUESDAY THROUGH
WEDNESDAY...AND AGAIN ON SATURDAY. A FEW OF THE THUNDERSTORMS
TUESDAY AND WEDNESDAY COULD BECOME STRONG TO SEVERE AND PRODUCE
HEAVY DOWNPOURS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT...HOWEVER
ANY REPORTS OF SIGNIFICANT WIND...HAIL OR RAINFALL FROM ANY STRONG
STORMS THIS AFTERNOON AND THIS EVENING ARE WELCOMED.

&&

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