FXUS63 KLOT 300625
AFDCHI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO IL
125 AM CDT MON JUN 30 2003

PUBLIC DISCUSSION FOR MORNING ZONES:

OLD FRONTAL BOUNDARY LAYING ACROSS CENTRAL IL NEAR CMI TO JUST N OF 
STL. S/W RIDING ALONG THIS BOUNDARY TNGT KEEPING SHOWERS AND TSTMS 
ALIVE ALONG AND JUST NORTH OF I-74. THIS WAVE PASSES EAST BY 
DAYBREAK WITH SFC HIGH BLDG IN FROM WEST. IAW ETA...THIS PUSHES 
BOUNDARY FURTHER SOUTH TODAY. NRN IL MAY SEE A LTL MORE SUNSHINE AS 
OVERSPREADING AC/CI FROM UPPER TROF IN PLAINS RECEDES A BIT SOUTH. 
HOWEVER LTL CHG IN 7H TRAJECTORY FROM THE PLAINS WOULD CONT THE 
CLOUD STREAM THRU MOST OF IL TODAY. THUS WUD GO FOR MORE CLOUDS THAN 
SUN...AND MAY BACK OFF HIGH TEMP A BIT TODAY FROM OTRW PREFERENTIAL 
ETA OUTPUT. LITE WINDS TODAY SHUD MAKE FOR A NOTICEABLE LAKE BREEZE 
THIS AFTN.

SFC RIDGE MOVES TO THE EAST TONIGHT AND WINDS BECOME MORE SELY ALTHO 
STILL LITE. MAY SEE MORE CLEARING NRN IL TNGT BUT STILL SOME CLOUDS 
SOUTH OF IKK-PNT LINE. ETA INDICATING A RAPID DEEPENING UPR LOW IN 
WRN GULF OF MEX TNGT AND STREAMING NEWD TO LWR OH VLY BY WED MRNG. 
BUT WEAK RIDGING STILL ANCHORING ACROSS LWR MICH TO NRN IL...THEN 
BLDG SOUTH ONCE AGAIN TO CENTRAL IL WED EVENING. 

AT SAME TIME...WEAK VORT LOBE DROPPING SEWD TO NRN IL TUES NGT BUT 
AM GETTING LTL MSTR HERE SINCE ACTIVITY MOVING UP LWR MS VLY IS 
STEALING ALL THE ACTION. THUS WILL KEEP IT DRY TUES NGT AND WED. 

REST OF WEEK SHOWS LTL PROMISE FOR RAIN UNTIL FRIDAY WHEN...ON 
GFS...APPEARS TO BE SOME MCS ACTIVITY IN NRN IA SPREADING INTO NRN 
IL. COORD WITH SURROUNDING OFFICE GRIDS SUGGESTS MAINTAINING CHC TRW 
INTO SAT AND SUN FOR CONTINUED MCS ACTION.

.CHI...NONE

RLB