FLUS43 KLOT 081655
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1155 AM CDT WED APR 8 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-
1155 AM CDT WED APR 8 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...THIS AFTERNOON AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME MAY PRODUCE:
LOCALLY HEAVY RAINFALL RESULTING IN LOCALIZED FLOODING.
HAIL TO TWO INCHES IN DIAMETER.
WIND GUSTS TO 60 MPH.
BRIEF TORNADO.
FREQUENT CLOUD TO GROUND LIGHTNING.
AREAS AFFECTED AND TIMING:
SCATTERED THUNDERSTORMS ARE LIKELY TO INCREASE IN COVERAGE FROM
WESTERN ILLINOIS ACROSS NORTHERN ILLINOIS DURING THE MID TO
LATE AFTERNOON...WITH THE GREATEST COVERAGE ACROSS THE AREA
BEING TONIGHT.
DISCUSSION:
AS THUNDERSTORMS ACROSS WESTERN ILLINOIS EARLY THIS AFTERNOON
APPROACH THE AREA...THEY WILL LIKELY INCREASE IN COVERAGE
AND IN INTENSITY...ESPECIALLY DURING THE EVENING. SEVERE STORMS
ARE POSSIBLE THROUGHOUT THE DURATION OF THE STORMS...WITH LARGE
HAIL BEING THE GREATEST THREAT. THERE IS AN OUTSIDE CHANCE THAT
SOME OF THE STORMS CLOSEST TO THE WARM FRONTAL
BOUNDARY...NAMELY ALONG AND SOUTH OF U.S. HIGHWAY 24...COULD
PRODUCE STRONG WINDS OR EVEN A BRIEF TORNADO.
IN ADDITION...AREAS OF DENSE FOG ARE LIKELY.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THE THREAT EXISTS FOR AN OUTBREAK OF SEVERE WEATHER
THUNDERSTORMS...INCLUDING THE POTENTIAL FOR TORNADOES...LATE
THURSDAY AFTERNOON INTO THURSDAY EVENING. ALL OF THE INGREDIENTS
NEED TO COME TOGETHER JUST RIGHT FOR A SIGNIFICANT SEVERE WEATHER
OUTBREAK...AND IF EVEN JUST ONE INGREDIENT FAILS TO MATERIALIZE
THE THREAT DECREASES SUBSTANTIALLY. EARLY INDICATIONS ARE THAT
MANY OF THE INGREDIENTS FOR A SIGNIFICANT OUTBREAK OF SEVERE
THUNDERSTORMS COULD BE IN PLACE THURSDAY AND LATER FORECASTS
AND OUTLOOKS SHOULD BE CLOSELY MONITORED.
THERE IS ANOTHER CHANCE OF THUNDERSTORMS SUNDAY NIGHT AND MONDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NECESSARY LATER THIS AFTERNOON INTO
TONIGHT...AND IS PROBABLE FOR A PERIOD ON THURSDAY AFTERNOON AND
EVENING.
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