NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...SOME MAY PRODUCE:
TORRENTIAL DOWNPOURS CAPABLE OF PRODUCING FLASH FLOODING.
PEA SIZE HAIL.
WIND GUSTS OVER 40 MPH.
FREQUENT LIGHTNING.
AREAS AFFECTED AND TIMING:
THUNDERSTORMS CAPABLE OF PRODUCING TORRENTIAL RAINFALL AND
LOCALIZED FLOODING ARE LIKELY THIS MORNING...ESPECIALLY BEFORE 9
AM. THERE IS A CHANCE FOR ADDITIONAL THUNDERSTORMS LATE THIS
AFTERNOON AND EARLY THIS EVENING...ESPECIALLY SOUTH OF
INTERSTATE 80.
DISCUSSION:
A LARGE CLUSTER OF SHOWERS AND THUNDERSTORMS WILL CONTINUE TO
MOVE ACROSS NORTHERN ILLINOIS THIS MORNING. THE PRIMARY THREAT
FROM THESE STORMS WILL LIKELY BE LOCALLY HEAVY RAINFALL TOTALS...
WHICH COULD RESULT IN SOME LOCALIZED FLOODING. THE THUNDERSTORMS
WILL MOVE OUT OF THE AREA DURING THE EARLY TO MID MORNING HOURS.
ADDITIONAL THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON INTO
THIS EVENING AS ANOTHER UPPER LEVEL DISTURBANCE MOVES ACROSS THE
AREA. WHILE AN ISOLATED SEVERE THUNDERSTORM CANNOT BE RULED OUT
SOUTH OF THE KANKAKEE RIVER...THE THREAT APPEARS TO BE QUITE LOW.
PORTIONS OF THE KANKAKEE RIVER IN NORTHWEST INDIANA AND ILLINOIS
RIVER IN LA SALLE COUNTY WILL REMAIN IN FLOOD.
THERE IS AN INCREASED RISK FOR RIP CURRENTS ALONG THE ILLINOIS
LAKE MICHIGAN SHORE TODAY.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THERE IS A CHANCE THAT WIDELY SCATTERED THUNDERSTORMS COULD
DEVELOP THURSDAY AFTERNOON AND EVENING. WHILE THE THREAT OF
THUNDERSTORM DEVELOPMENT APPEARS LOW...IF STORMS DO DEVELOP THEY
WOULD BE CAPABLE OF PRODUCING LARGE HAIL AND POSSIBLY LOCALLY
DAMAGING WINDS.
A FRONTAL BOUNDARY IS FORECAST TO WAVER AROUND THE REGION FRIDAY
THROUGH THE UPCOMING WEEKEND BRINGING PERIODIC CHANCES FOR
THUNDERSTORMS...WITH SOME POTENTIAL FOR SEVERE WEATHER. IT IS TOO
EARLY TO PREDICT THE TRACK OF THUNDERSTORM CLUSTERS THIS
WEEKEND...HOWEVER THERE DOES APPEAR TO BE SOME POTENTIAL FOR
REPEATED BOUTS OF THUNDERSTORMS PRODUCING HEAVY...AND POTENTIALLY
FLOODING RAINFALL TOTALS OVER PORTIONS OF THE OUTLOOK AREA.
PORTIONS OF THE KANKAKEE RIVER IN NORTHWEST INDIANA AND ILLINOIS
RIVER IN LA SALLE COUNTY WILL REMAIN IN FLOOD. IN ADDITION...HEAVY
RAINFALL OVER THE NEXT SEVERAL DAYS COULD LEAD TO RISES AND
POTENTIAL FLOODING ALONG OTHER AREA RIVERS AND STREAMS.
.SPOTTER INFORMATION STATEMENT...
SPOTTERS ARE ENCOURAGED TO REPORT HEAVY RAINFALL TOTALS TO THE
NATIONAL WEATHER SERVICE CHICAGO.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
