Severe Thunderstorm Warning 98, NWS Chicago, IL

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO IL
400 PM CDT TUE JUL 8 2003

CORRECTED TO ADD FLOOD WATCH INFO

PUBLIC DISCUSSION FOR PM GRIDS/FCSTS...

WAVES OF TSRA MOVG E ACROSS CWA...WITH MOST INTENSE ALONG AND JUST N
OF SFC BNDRY FM NRN IN WSW ACROSS IL TO NEAR MO/IA BORDER. EXPECT AT
LEAST ONE MORE ROUND AS SHORT WAV TROF SE MN/IA/NW MO MOVS ACROSS
MID MS VALLEY THIS EVE. WHILE FAR NRN COUNTIES RCVD HVY RA THIS
MORNING...HEAVIEST THIS AFTERNOON HAS BEEN NEAR IL AND KANKAKEE
RIVER VALLEYS AND EXPECT HEAVIEST THIS EVE TO BE IN THE SAME AREA
NEAR BNDRY SO HAVE FLOOD WATCH COUNTIES ALONG AND S.

TEMPORARY BREAK LATER TONIGHT BEFORE NEXT ROUND OF TSRA BREAKS
OUT/OVERSPREADS REGION WED WITH UPR LOW OVR MT MOVG ESE ACROSS DKTS
TO SRN MN/NRN IA BY 00Z THU AND RESULTING SFC DEVELOPMENT INCREASING
LOW LEVEL CONVERGENCE ALONG AND LIFT OVR BNDRY WHICH REMAINS ACROSS
NRN IL.

CONT THREAT OF TSRA WED NIGHT AND THU AS UPR LOW SLOLY PROGRESSES
EWRD ACROSS REGION...THEN ENDS THU NIGHT AS IT OPENS AND LIFTS NEWRD
INTO GRTLKS.

.CHI...FLOOD WATCH TONIGHT ALONG AND S OF KANKAKEE AND ILLINOIS
RIVERS.

TRS

AVIATION DISCUSSION FOR 18Z TAFS:

MAIN PROBLEM THIS TAF PERIOD WILL BE TO PINPOINT TIMING ON WAVES OF
TSTMS THAT WILL BE MOVING ACRS TERMINALS THIS AFTN AND TNGT.  STG
STNRY SFC BOUNDARY WILL REMAIN IN PLACE FROM NR KANKAKEE RVR IN NWRN
IN WWD ALG CORRIDOR S OF I-80.  SATLT IMAGERY SHOWS TCU DVLPG RPDLY
ALG THIS BOUNDARY AND EXPECT ZONE FROM E OF MLI TO IKK TO FILL IN
WITH TSTMS NXT HR OR TWO.  WAVE OF STMS E OF QUAD CITIES SHUD MOVE
INTO RFD AREA SHORTLY...AND INTO NERN IL ARND 19ZZ.   ANOTHER WAVE
OF POTLY SVR TSTMS NOW MOVG THRU CNTRL/ERN IA WILL BE MOVING INTO
TERMINAL AREA ARND 21Z.   FOR NOW...WILL KEEP TERMINALS QUIET AFTER
THE WAVE OF IA STMS MOVES THRU ERLY THIS EVENING...BUT THUNDER COULD
ERUPT AGAIN AT ANY TIME.  OVERALL CIGS COND WILL BE VFRTHIS AFTN XCP
IN AND NR TSTM CLUSTERS.  WITH RAIN COOLED AIR IN LOW LVLS TNGT
EXPECT CIGS TO LOER TO MVFR.  VIS GENLY OK TOO XCP LCLLY IFR IN
TSTMS.   WITH SFC BOUNDARY S OF TERMINALS...GENL WIND FLOW WILL BE
FROM NE-ENE ARND 10 KTS.

MERZLOCK

ILZ003>006-008-010>014-019-020>023-032-033-039-INZ001-002-010-011-019
-091100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO IL
345 PM CDT TUE JUL 8 2003

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

.DAY ONE... TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH 7 PM FOR
AREAS MAINLY ALONG AND SOUTH OF I 80.  A LULL IN THE ACTIVITY IS
EXPECTED BETWEEN 7 PM AND 3 AM WEDNESDAY...WITH ANOTHER THREAT OF
SEVERE STORMS AFTER 3 AM FOR ALL AREAS. THE GREATEST SEVERE WEATHER
THREATS ARE DAMAGING WINDS AND LARGE HAIL.

A LINE OF THUNDERSTORMS NEAR I 39 AT 340 PM...WILL CONTINUE TO MOVE
EASTWARD ACROSS THE REGION THROUGH 7 PM.  AFTER 3 AM WEDNESDAY...
ANOTHER UPPER LEVEL DISTURBANCE WILL MOVE SOUTHEAST ACROSS THE
REGION BRINGING ANOTHER CHANCE OF SEVERE WEATHER.

IN ADDITION TO THE SEVERE WEATHER THREAT...LOCAL FLOODING WILL BE
POSSIBLE WHERE HEAVY RAIN PERSISTS...ESPECIALLY FOR AREAS SOUTH OF
INTERSTATE 80.

.DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ON WEDNESDAY FOR
THE ENTIRE AREA. THE MAIN SEVERE WEATHER THREAT WILL BE DAMAGING
WINDS...LARGE HAIL AND THE POSSIBILITY OF TORNADOES.

LOW PRESSURE WILL MOVE EAST ACROSS THE MIDWEST WEDNESDAY AND
WEDNESDAY NIGHT. A TRAILING COLD FRONT FROM THIS LOW WILL PUSH
ACROSS THE AREA WEDNESDAY NIGHT. SEVERE THUNDERSTORMS ARE EXPECTED
TO DEVELOP AHEAD OF THE FRONT.

HEAVY RAINFALL WILL AGAIN BE POSSIBLE WEDNESDAY AND WEDNESDAY NIGHT.

THERE IS A CHANCE OF THUNDERSTORMS THURSDAY AND AGAIN ON SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS WILL BE NEEDED TODAY...TONIGHT AND WEDNESDAY.

&&

           NWS CHICAGO WEBPAGE

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

STEFKOVICH/MERZLOCK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1216 PM CDT TUE JUL 08 2003

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

1110 PM    GOODLAND                  IN   WIND DAMAGE
07/07/03   NEWTON                         TREES AND POWER LINES
                                          DOWN.  POWER OUT.
                                          REPORTED BY EMERGENCY
                                          MANAGEMENT.

1110 PM    MOROCCO                   IN   WIND DAMAGE
07/07/03   NEWTON                         POWER LINES DOWN. POWER
                                          OUT. REPORTED BY
                                          EMERGENCY MANAGEMENT.

ILZ003>006-081910-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
154 PM CDT TUE JUL 8 2003

SEVERE THUNDERSTORM WATCH NUMBER 679...WHICH WAS IN EFFECT
FOR WINNEBAGO...BOONE...MCHENRY...AND LAKE COUNTY IN ILLINOIS HAS
BEEN CANCELLED.  SEVERE THUNDERSTORMS HAVE MOVED OUT OF THE
AREA. ADDITIONAL THUNDERSTORM DEVELOPMENT IS LIKELY LATER TODAY.
A TORNADO WATCH HAS BEEN ISSUED FOR MUCH OF NORTHERN ILLINOIS.
THIS IS A POTENTIALLY SERIOUS SITUATION AND ADDITIONAL WATCHES
MAY BE ISSUED.

ASK

ILZ003>006-081950-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
217 PM CDT TUE JUL 8 2003

SEVERE THUNDERSTORM WATCH NUMBER 679...WHICH WAS IN EFFECT
FOR WINNEBAGO...BOONE...MCHENRY...AND LAKE COUNTY IN ILLINOIS HAS
BEEN CANCELLED.  SEVERE THUNDERSTORMS HAVE MOVED OUT OF THE
AREA. ADDITIONAL THUNDERSTORM DEVELOPMENT IS LIKELY LATER TODAY.
A TORNADO WATCH HAS BEEN ISSUED FOR MUCH OF NORTHERN ILLINOIS.
THIS IS A POTENTIALLY SERIOUS SITUATION AND ADDITIONAL WATCHES
MAY BE ISSUED.

ASK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
258 PM CDT TUE JUL 08 2003

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

0146 PM    6 N OTTAWA                IL   1 INCH HAIL
07/08/03   LASALLE                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

0146 PM    6 N OTTAWA                IL   1 INCH HAIL
07/08/03   LASALLE                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.