Flash Flood Warning 13, NWS Chicago, IL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO IL
234 AM CDT TUE AUG 24 1999

OCCLUDED VORTEX SPINNING OVER NRN IL THIS MRNG WITH BANDS OF RW/TRW
MOVING NWD ACRS AREA. INITIAL MEAN BAROCLINIC ZONE NOW WELL SOUTH INTO
INDIANA AND SRN IL WHILE ANOTHER SPOKE IS STIRRING UP PCPN IN WRN IL
ALG LEADING EDGE OF WIND SHIFT LINE AND THRU ZONE OF LOWER STABILITY.

MODELS IN GENL AGREEMENT IN MOVING THE SFC FEATURE SLOWLY SEWD INTO
WRN INDIANA LATER TDA WITH SFC FLO ACRS CWA BECOMING E TO NE.  BEST
MID LEVEL DEFORMATION APPEARS TO BE N ACRS SRN AND CNTRL WISC TDA SO
EXPECT BEST WDSPR PCPN TO BE N OF FCST AREA.  STILL..WITH COOL POOL
ALFT AND DYNAMICS ARND SLOW MOVING UPR SYS..PERIODS OF SHWRS AND FEW
THUNDERSTORMS ARE LKLY THRU THE DAY.  COULD BE BRIEF SUNSHINE IN SOME
DRIER AIR SPIRALS BUT IN GENL CLDY CONDS SHOULD PREVAIL.

GIVEN FCST SLOW MOVMT OF SYS IMPROVEMENT WILL BE SLOW AND DRAG ON INTO
WED.  WILL CONT SCTD SHWRS ON WED BUT WITH LOWER POPS.  BY WED NGT ON
INTO THUR SYS SHUD BE FAR ENOUGH EAST AND SFC ANTICYCL PROGGED ACRS
NRN LAKES THAT DRIER AIR AND SOME SUN WILL RETURN ON THUR...BEING
OPTIMISTIC.

NOT MUCH TO CHOOSE FROM IN MOS/FAN NUMBERS AND WILL GO ALONG WITH THEM
TDA FOR LACK OF ANY STRONG CONVICTIONS.  MOS MAXS ON WED SEEM A BIT
HIGH GIVEN THE UNCERTAINTY OF CLEARING AND NE WIND. UNLESS NEW MRF HAS
A SURPRISE..EXTENDD PD LOOK RATHER BENIGN. KML

.CHI...NONE

ILZ003>006-008-010>014-019>023-032>033-039-INZ001>002-010>011-
019-241700-

HAZRDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO IL
600 AM CDT/EST TUE AUG 24 1999

FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHWEST INDIANA

AN URBAN AND SMALL STREAM ADVISORY FOR WINNEBAGO AND SOUTHERN BOONE
COUNTIES UNTIL 9AM.  OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED IN
NORTHEAST ILLINOIS OR NORTHWEST INDIANA TODAY OR TONIGHT.

HOWEVER..
AN ACTIVE UPPR LEVEL LOW PRESSURE CIRCULATION NEAR PEORIA THIS
MORNING IS EXPECTED TO DRIFT VERY SLOWLY TO THE SOUTHEAST TODAY.
BANDS OF SHOWERS AND THUNDERSTORMS ARE ROTATING AROUND THIS SYSTEM
ACROSS NORTHERN ILLINOIS THIS MORNING.

A NARROW ZONE FROM NORTHERN LASALLE COUNTY NORTH AND NORTHWEST TO
SOUTHERN WINNEBAGO COUNTY MAY HAVE PICKED UP UP TO 3 INCHES OF RAIN
IN A FEW SPOTS OVERNIGHT.  ADDITIONAL RAIN IS EXPECTED FOR A FEW
HOURS EARLY THIS MORNING.

IN ADDITION WITH THE SLOW MOVMENT OF THE LARGER SCALE SYSTEM ANY THUNDERSTORMS
WHICH DEVELOPE DURING THE AFTERNOON MAY PRODUCE WEAK FUNNEL CLOUDS
IN ISOLATED CASES.  ANY OF THESE WHICH ARE OBSERVED SHOULD BE QUITE
WEAK NOT A THREAT TO LIFE OR PROPERTY...MOST LIKELY NOT TOUCHING THE
GROUND.

KML

ILZ003>006-008-010>014-019>023-032>033-039-INZ001>002-010>011-
019-251100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO IL
NOON CDT/EST TUE AUG 24 1999

FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHWEST INDIANA

NO SEVERE THUNDERSTORMS IS EXPECTED THIS AFTERNOON OR TONIGHT.

AN UPPER LEVEL LOW OVER SOUTHERN FORD COUNTY IN ILLINOIS WILL DRIFT
EAST SOUTHEAST THIS AFTERNOON INTO WESTERN INDIANA EARLY TONIGHT.
SHOWERS AND SOLAR ENHANCED THUNDERSTORMS WILL WRAP AROUND THIS UPPER
LOW AND ACROSS NORTHERN ILLINOIS AND NORTHWEST INDIANA THROUGH THAT
TIME.  NONE OF THESE THUNDERSTORMS IS EXPECTED TO REACH SEVERE
CRITERIA.

BRUMER