FLUS43 KLOT 080955
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
455 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-
455 AM CDT WED APR 8 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME MAY PRODUCE:
LOCALLY HEAVY RAINFALL WHICH COULD RESULT IN LOCALIZED FLOODING.
HAIL TO ONE INCH IN DIAMETER.
FREQUENT CLOUD TO GROUND LIGHTNING.
AREAS AFFECTED AND TIMING:
SCATTERED THUNDERSTORMS WILL AFFECT PORTIONS OF THE AREA EARLY
THIS MORNING...PARTICULARLY SOUTH OF THE INTERSTATE 80 CORRIDOR.
THE STRONGEST STORMS WILL LIKELY MOVE EAST OF THE AREA BY 8 AM
CDT.
ADDITIONAL THUNDERSTORMS WILL DEVELOP THIS EVENING FROM THE
SOUTHWEST...AND WILL AFFECT THE ENTIRE AREA OVERNIGHT.
DISCUSSION:
A CLUSTER OF THUNDERSTORMS WAS MOVING EAST ACROSS AREAS MAINLY
SOUTH OF INTERSTATE 80 EARLY THIS MORNING...IN RESPONSE TO WARM
AND UNSTABLE AIR BEING LIFTED OVER A STATIONARY FRONT LOCATED
ACROSS CENTRAL ILLINOIS AND INDIANA. THESE STORMS WERE OCCURRING
IN ASSOCIATION WITH A MID LEVEL DISTURBANCE WHICH WILL MOVE EAST
OF THE REGION BY MID MORNING.
ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED TO DEVELOP THIS
EVENING AND SPREAD ACROSS THE AREA OVERNIGHT. SOME OF THESE STORMS
MAY BE CAPABLE OF PRODUCING HAIL UP TO QUARTER SIZE AND HEAVY
DOWNPOURS.
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 WILL NOT BE NECESSARY THROUGH TONIGHT...
THOUGH RAINFALL REPORTS OR HAIL REPORTS WOULD BE WELCOMED.
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