Thursday, June 11, 2015

Hazardous Weather Outlook for Mchenry Co., IL

FLUS43 KLOT 110943
HWOLOT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
443 AM CDT THU JUN 11 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-
443 AM CDT THU JUN 11 2015

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

.DAY ONE...TODAY AND TONIGHT.

WEATHER HAZARDS EXPECTED:

THUNDERSTORMS...THE STRONGEST OF WHICH MAY PRODUCE:
GOLF BALL SIZE HAIL.
WIND GUSTS IN EXCESS OF 60 MPH.
A TORNADO.
HEAVY RAINFALL AND LOCALIZED FLOODING.

AREAS AFFECTED AND TIMING:

SCATTERED STORMS ARE LIKELY THIS MORNING ACROSS THE REGION WITH A
CHANCE FOR ISOLATED HAIL AND STRONG WINDS. SCATTERED TO NUMEROUS
STORMS ARE EXPECTED TO DEVELOP DURING THE MID TO LATE AFTERNOON
INTO THE EVENING ALONG AND NORTH OF INTERSTATE 80 AND GRADUALLY
MOVE NORTHEAST. THIS IS THE MOST FAVORED TIME FOR SEVERE
WEATHER. MORE STORMS ARE LIKELY LATE TONIGHT WITH A CHANCE FOR
STRONG WINDS.

DISCUSSION:

AS DEEPER MOISTURE RETURNS TO THE AREA THIS MORNING...SCATTERED
STORMS ARE LIKELY WITH THE POSSIBILITY OF A FEW SEVERE STORMS. A
SURFACE WARM FRONT NEAR I-74 THIS MORNING WILL ADVANCE NORTHWARD
AND LIKELY BE NEAR I-80 DURING PEAK HEATING. ALONG AND NORTH OF
THIS FRONT WILL BE A FAVORED AREA FOR STRONG STORMS...A FEW OF
WHICH LIKELY WILL BE SEVERE IN THE REGION. WHILE LARGE HAIL AND
ISOLATED STRONG WINDS ARE THE PRIMARY THREATS FROM MID AFTERNOON
INTO THE EVENING...THE POSSIBILITY OF A COUPLE TORNADOES EXISTS
WITH STORMS ON THE WARM FRONTAL BOUNDARY.

PORTIONS OF THE IROQUOIS AND KANKAKEE RIVERS WILL REMAIN IN FLOOD
STAGE.

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

THUNDERSTORMS ARE LIKELY ON FRIDAY. THERE IS A CHANCE FOR A FEW OF
THESE TO BE SEVERE. PERIODIC THUNDERSTORM CHANCES WILL EXIST
SATURDAY NIGHT THROUGH EARLY NEXT WEEK.

PORTIONS OF THE IROQUOIS AND KANKAKEE RIVERS WILL REMAIN IN FLOOD
STAGE THROUGH LATE THIS WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND THIS EVENING.

&&

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