FLUS43 KLOT 091620
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1120 AM CDT THU APR 9 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-
1120 AM CDT THU APR 9 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 BE SEVERE AND PRODUCE:
LOCALLY HEAVY RAINFALL RESULTING IN LOCALIZED FLOODING.
HAIL UP TO THE SIZE OF HALF DOLLARS.
DAMAGING WINDS UP TO 70 MPH.
FREQUENT CLOUD TO GROUND LIGHTNING.
AND POSSIBLY AN ISOLATED TORNADO.
AREAS AFFECTED AND TIMING:
THERE WILL BE PERIODS OF THUNDERSTORMS THROUGH EARLY TO
POSSIBLY MID EVENING. THE GREATEST THREAT OF ANY SEVERE
THUNDERSTORMS WILL LIKELY BE BETWEEN 2 PM AND 9 PM.
DISCUSSION:
A WARM...MOIST...AND UNSTABLE AIRMASS WILL CONTINUE TO
OVERSPREAD THE REGION TODAY AND SET THE STAGE FOR SCATTERED
SHOWERS AND THUNDERSTORMS TO CONTINUE TO DEVELOP ACROSS THE
REGION UNTIL A COLD FRONT SWEEPS ACROSS THE AREA THIS EVENING.
CONSIDERABLE CLOUD COVER AND THE RELATIVELY HIGH COVERAGE OF
SHOWERS AND THUNDERSTORMS DURING THE DAY TODAY COULD LIMIT THE
MAGNITUDE AND COVERAGE OF THE SEVERE WEATHER THREAT SOMEWHAT
TODAY. HOWEVER...STRONG WINDS ALOFT AND SUFFICIENT INSTABILITY
COULD STILL ALLOW FOR SOME OF THE THUNDERSTORMS TO BECOME
SEVERE. THE PRIMARY THREATS APPEAR TO BE LARGE HAIL AND
DAMAGING WINDS...HOWEVER AN ISOLATED TORNADO CANNOT BE RULED
OUT.
ALSO...A VERY MOIST AIR MASS IS IN PLACE AND ANY THUNDERSTORM
CAN GO ON TO PRODUCE TORRENTIAL RAINFALL WHICH COULD RESULT IN
LOCALIZED FLOODING.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
THERE IS A CHANCE OF THUNDERSTORMS SUNDAY NIGHT...AND AGAIN
TUESDAY INTO WEDNESDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.
&&
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