Hazardous Weather Outlook

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
128 PM CDT MON MAY 20 2013

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
211830-
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-
128 PM CDT MON MAY 20 2013 /228 PM EDT MON MAY 20 2013/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

  WEATHER HAZARDS EXPECTED:

  THUNDERSTORMS...THE STRONGEST COULD PRODUCE:
    HAIL TO THE SIZE OF HALF DOLLARS.
    WIND GUSTS OVER 60 MPH.
    FREQUENT CLOUD TO GROUND LIGHTNING.
    AND HEAVY RAIN.

  AREAS AFFECTED AND TIMING:

  SCATTERED THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON INTO
  EARLY THIS EVENING...MAINLY SOUTH OF A WAUKEGAN TO PERU LINE.
  ADDITIONAL THUDERSTORMS ARE POSSIBLE TONIGHT ACROSS THE ENTIRE
  OUTLOOK AREA.

  DISCUSSION:

  A SMALL UPPER LEVEL DISTURBANCE OVER WEST CENTRAL ILLINOIS EARLY
  THIS AFTERNOON WILL TRACK NORTHEAST INTO THE AREA LATE THIS
  AFTERNOON. SOME DESTABILIZATION IS TAKING PLACE IN ADVANCE OF
  THE DISTURBANCE AND COULD ALLOW THE THUNDERSTORMS TO INTENSIFY
  THIS AFTERNOON...WITH SOME POTENTIAL FOR THEM TO BECOME SEVERE.
  IF THEY DO INTENSIFY...THE PRIMARY HAZARD WOULD BE DAMAGING
  WINDS. THE BEST THREAT OF THUNDERSTORMS WITH THIS DISTURBANCE
  LATE THIS AFTERNOON WOULD BE SOUTH OF CHICAGO INTO NORTHWEST
  INDIANA.

  ADDITIONAL THUNDERSTORMS COULD DEVELOP TONIGHT WITH CONDITIONS
  REMAINING FAVORABLE FOR SOME OF THE STORMS TO BECOME
  SEVERE...THE PRIMARY THREATS WILL BE LARGE HAIL AND DAMAGING
  WINDS THE PRIMARY THREATS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

  SCATTERED THUNDERSTORMS WILL BE POSSIBLE TUESDAY THROUGH
  WEDNESDAY NIGHT...WITH THE POTENTIAL FOR SEVERE WEATHER TUESDAY
  ACROSS THE ENTIRE AREA. THE MAIN SEVERE WEATHER THREATS WILL BE
  DAMAGING WIND GUSTS AND LARGE HAIL.

  HEAVY RAIN WILL ALSO BE POSSIBLE FROM ANY OF THE THUNDERSTORMS
  THAT FORM TUESDAY NIGHT INTO WEDNESDAY MORNING. HEAVY RAINFALL
  COULD LEAD TO LOCALIZED FLOODING...ESPECIALLY IN LOW LYING AND
  POORLY DRAINED AREAS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS MAY BE NEEDED THIS AFTERNOON INTO TONIGHT.

&&

$$