Thursday, August 18, 2016

Hazardous Weather Outlook for Mchenry Co., IL

FLUS43 KLOT 190100 AAA
HWOLOT

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
800 PM CDT THU AUG 18 2016


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-
800 PM CDT THU AUG 18 2016 /900 PM EDT THU AUG 18 2016/

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

.DAY ONE...TONIGHT.

WEATHER HAZARDS EXPECTED:
SIGNIFICANT THUNDERSTORM RISK...WITH AN ASSOCIATED:
LIMITED THUNDERSTORM WIND DAMAGE RISK...UP TO 60 MPH.

ELEVATED FLOODING RISK.

DISCUSSION:

THUNDERSTORMS ARE EXPECTED TO MOVE INTO NORTH CENTRAL ILLINOIS LATE
THIS EVENING AND MOVE SOUTHEAST INTO OVERNIGHT. SLOW STORM MOVEMENT
AND VERY HEAVY RAINFALL RATES WILL SUPPORT RAINFALL AMOUNTS CAPABLE
OF FLASH FLOODING...ESPECIALLY CONSIDERING HOW WET LOCAL AREAS
HAVE RECENTLY BEEN. A COUPLE STORMS COULD PRODUCE NEAR SEVERE WIND
GUSTS...MAINLY IN NORTH CENTRAL ILLINOIS.

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

FRIDAY...
ELEVATED THUNDERSTORM RISK.
SATURDAY...
LIMITED FLOODING RISK.
LIMITED SEVERE THUNDERSTORM RISK....EAST OF INTERSTATE 55.
HIGH SWIM RISK.
WEDNESDAY...
LIMITED THUNDERSTORM RISK.

DISCUSSION:

WHILE THERE IS A SLIGHT CHANCE OF STORMS FRIDAY...THE BEST CHANCE
FOR WIDESPREAD STORMS IS SATURDAY. HEAVY RAIN AND LOCALIZED
FLOODING IS POSSIBLE...AND SOME STORMS MAY BECOME STRONG TO
SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE LATE THIS EVENING...MAINLY OVER
NORTH CENTRAL ILLINOIS.

GENERAL STORM MOTION OF THE DAY:

MOVING TOWARD THE EAST SOUTHEAST AT 20 MPH.

&&

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