Thursday, July 21, 2016

Hazardous Weather Outlook for Mchenry Co., IL

FLUS43 KLOT 210934
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
434 AM CDT THU JUL 21 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-
434 AM CDT THU JUL 21 2016 /534 AM EDT THU JUL 21 2016/

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

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:
LIMITED THUNDERSTORM RISK...WITH AN ASSOCIATED:
LIMITED HAIL RISK...UP TO NICKEL SIZE.
LIMITED THUNDERSTORM WIND DAMAGE RISK...UP TO 60 MPH.
SIGNIFICANT EXCESSIVE HEAT RISK.

DISCUSSION:

ISOLATED THUNDERSTORMS...A FEW POSSIBLY STRONG...ARE POSSIBLE
THIS AFTERNOON MAINLY NORTH OF A STREATOR TO KANKAKEE LINE.

DANGEROUS HEAT WILL ARRIVE TODAY WITH MAXIMUM HEAT INDEX VALUES
BETWEEN 105 AND 115.

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

FRIDAY...
LIMITED SEVERE THUNDERSTORM RISK.
SIGNIFICANT EXCESSIVE HEAT RISK.
SATURDAY...
LIMITED SEVERE THUNDERSTORM RISK.
ELEVATED EXCESSIVE HEAT RISK.
SUNDAY...
LIMITED THUNDERSTORM RISK.
SIGNIFICANT EXCESSIVE HEAT RISK.
TUESDAY AND WEDNESDAY...
LIMITED THUNDERSTORM RISK.

DISCUSSION:

DANGEROUS HEAT WILL CONTINUE FRIDAY WITH SOME IMPROVEMENT
POSSIBLE SATURDAY. MAXIMUM HEAT INDEX VALUES COULD PEAK NEAR
110 DEGREES ON FRIDAY...AND 100 TO 110 ON SATURDAY.

AREAS NORTH AND CLOSE TO THE LAKE COULD HAVE SOME RELIEF ON
FRIDAY DUE TO POTENTIAL THUNDERSTORMS THURSDAY NIGHT INTO
FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS MAY BE NEEDED THIS AFTERNOON.

GENERAL STORM MOTION OF THE DAY:

SOUTHEAST AT 30 MPH.

&&

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