Severe Thunderstorm Warning 102, NWS Chicago, IL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO IL
330 PM CDT WED JUL 9 2003

PUBLIC DISCUSSION FOR PM ZONES/GRIDS...

LATEST BATCH OF SHRA/TSRA E OF I-55. NRN PORTION MOVG E AT
50...WHILE STRONGER SRN PORTION MOVG E AT 30 CLOSER TO BOUNDARY.
WILL BE EXITING SERN COUNTIES DURG LATE AFTERNOON AND EARLY EVE AS
LEAD SHORT WAVE TROF CONTS E INTO IN. NEXT ROUND DEVELOPING OVER IA.
CONT DVLPMNT EXPECTED INTO NRN IL AS LOW LEVEL FLO BACKS WITH
ENHANCED CONVERGENCE/LIFT ALONG FRONTAL BOUNDARY EXTENDING FM E
CNTRL IA SEWRD ACROSS N HALF OF IL INTO W CNTRL IND IN RESPONSE TO
MAIN SHORT WAVE TROF MN/IA/MO ROTATING ACROSS MID MS VALLEY DURG
EVE. TROF AND AND ASSOCIATED CDFNT CONTS THRU CFA OVERNIGHT AND
EARLY THU. THIS SHUD TURN OFF TAP FOR A BIT WITH ANY SIG CHC OF SHRA
CONFINED TO N OF IL STATE LN ON THU...CLOSER TO CENTER OF MID LEVEL
LOW.  CHC OF THUNDERSHOWERS FRI AFTERNOON INTO EVE AND AGAIN SAT
AFTERNOON INTO EVE WITH DAYTIME HEATING AND MINOR IMPULSES DROPPING
SE INTO UPR TROF AXIS AS UPR LOW SLOWLY TRACKS ACROSS ONTARIO INTO
QUEBEC.

.CHI...NONE.
TRS

AVIATION DISCUSSION FOR 18Z TAFS

MAIN CONCERN IS BAND OF SHOWERS AND THUNDERSTORMS MOVING THROUGH
NORTHEAST ILLINOIS ATTM. THERE HAVE BEEN REPORTS OF WIND GUSTS 30 TO
40 KNOTS...ESPECAILLY WITH THE SOUTH END OF THIS LINE...AND ALSO
SMALL HAIL. WILL HAVE THUNDER WITH GUSTY WEST WINDS IN
ORD...MDW...GYY FOR THE NEXT 1-2 HOURS...FOLLOWED BY A PERIOD OF
SHOWERS AND MVFR CIGS. THE BRUNT OF THE THUNDERSTORM ACTIVITY SHOULD
BE CLOSER TO THE STATIONARY FRONT SOUTH OF THE CHICAGO TERMINALS
THIS AFTERNOON AND EVENING. AS SURFACE LOW AND WARM FRONT APPROACHES
LATER TONIGHT...COULD GET A PERIOD OF THUNDERSTORMS AROUND MIDNIGHT
OR SO. THEN COLD FRONT COMES THROUGH BY MRONING WITH GOOD DRY PUNCH
WHICH SHOULD END THUNDERSTORM THREAT. WINDS WILL BE LIGHT EAST TODAY
BECOMING LIGHT SOUTHEAST TONIGHT...THEN TURNING SSW BRIEFLY BEHIND
WARM FRONT...THEN WEST BEHIND COLD FRONT.

ALLSOPP

ILZ003>006-008-010>014-019-020>023-032-033-039-INZ001-002-010-011-019
-101100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO IL
600 AM CDT WED JUL 9 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL AND NORTHEAST
ILLINOIS...NORTHWEST INDIANA...AND THE ADJACENT WATERS OF LAKE
MICHIGAN.

.DAY ONE... TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT.
THE GREATEST SEVERE WEATHER THREAT WILL BE DAMAGING WINDS AND LARGE
HAIL. ALTHOUGH THUNDERSTORMS WILL BE POSSIBLE TODAY AND TONIGHT...
THE BEST CHANCE OF SEVERE WEATHER APPEARS TO BE THIS AFTERNOON INTO
THIS EVENING.

A STATIONARY BOUNDARY ACROSS CENTRAL ILLINOIS AND CENTRAL INDIANA
WILL LIFT NORTH TO AROUND INTERSTATE 80 BY THIS EVENING. LOW
PRESSURE WILL MOVE ALONG THIS FRONTAL BOUNDARY TONIGHT...WITH A COLD
FRONT PUSHING ACROSS THE AREA LATE THIS EVENING AND OVERNIGHT.

.DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY

THERE IS A CHANCE OF THUNDERSTORMS THURSDAY. THUNDERSTORMS WILL BE
POSSIBLE AGAIN SATURDAY THROUGH TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS WILL BE NEEDED TODAY AND TONIGHT.

&&

           NWS CHICAGO WEBPAGE

    HTTP://WWW.CRH.NOAA.GOV/LOT (LOWER CASE)
OR  HTTP://WEATHER.NOAA.GOV/CHICAGO (LOWER CASE)

CMS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1156 AM CDT WED JUL 09 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1146 AM    SANDWICH                  IL   62 MPH TSTM GUST
07/09/03   DEKALB                         REPORTED BY EMERGENCY
                                          MANAGEMENT.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
206 PM CDT WED JUL 09 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0153 PM    FOWLER                    IN   FLOOD
07/09/03   BENTON                         0.80 INCHES OF RAIN IN
                                          5 MINUTES. REPORTED BY
                                          EMERGENCY MANAGEMENT.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
226 PM CDT WED JUL 09 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0210 PM    RENSSELAER                IN   FLOOD
07/09/03   JASPER                         A NUMBER OF STREETS
                                          CLOSED DUE TO FLOODING.
                                          8.41 INCHES OF RAIN
                                          FROM THE MORNING OF THE
                                          4TH TO THE MORNING OF
                                          THE 8TH. REPORTED BY
                                          COOPERATIVE OBSERVER.

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