490  
FPUS53 KLSX 130154  
ZFPLSX  
 
ZONE FORECASTS  
NATIONAL WEATHER SERVICE SAINT LOUIS MO  
853 PM CDT WED AUG 12 2026  
 
ILZ100-101-MOZ061-063-064-130900-  
MADISON IL-SAINT CLAIR IL-SAINT CHARLES MO-SAINT LOUIS MO-  
SAINT LOUIS CITY MO-  
INCLUDING THE CITIES OF ALTON, EDWARDSVILLE, BELLEVILLE, CAHOKIA,  
SAINT CHARLES, AND SAINT LOUIS  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 70S. SOUTH WINDS AROUND 5 MPH.  
CHANCE OF RAIN 50 PERCENT. HEAT INDEX VALUES UP TO 102 EARLY THIS  
EVENING.    
THURSDAY
 
MOSTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY IN THE MORNING. HOT WITH HIGHS IN THE MID 90S. SOUTH WINDS  
AROUND 5 MPH. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO  
111 IN THE AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING. HUMID WITH LOWS IN THE UPPER 70S.  
SOUTH WINDS 5 TO 10 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX  
VALUES UP TO 110 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.  
SOUTHWEST WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 111.    
FRIDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE UPPER 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 111 EARLY IN THE EVENING.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. HOT. HIGHS IN THE UPPER  
90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 110.    
SUNDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN PARTLY CLOUDY  
WITH A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS  
AFTER MIDNIGHT. LOWS IN THE LOWER 70S. CHANCE OF RAIN 30 PERCENT.  
HEAT INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF THUNDERSTORMS. A  
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS  
IN THE AFTERNOON. HIGHS IN THE UPPER 80S. CHANCE OF RAIN  
30 PERCENT.    
MONDAY NIGHT THROUGH TUESDAY NIGHT
 
PARTLY CLOUDY WITH A  
20 PERCENT CHANCE OF SHOWERS. LOWS AROUND 70. HIGHS IN THE UPPER  
80S.    
WEDNESDAY
 
MOSTLY SUNNY. HIGHS IN THE LOWER 90S. HEAT INDEX  
VALUES UP TO 100.  
 

 
 
MOZ049-050-130900-  
OSAGE MO-CALLAWAY MO-  
INCLUDING THE CITY OF FULTON  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS THIS  
EVENING. LOWS IN THE MID 70S. SOUTH WINDS AROUND 5 MPH. CHANCE OF  
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 103 EARLY THIS EVENING.    
THURSDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. SOUTH  
WINDS 5 TO 10 MPH. HEAT INDEX VALUES UP TO 108 IN THE AFTERNOON.    
THURSDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 106 EARLY IN THE EVENING.    
FRIDAY
 
SUNNY, HOT WITH HIGHS IN THE UPPER 90S. SOUTHWEST WINDS  
5 TO 10 MPH. HEAT INDEX VALUES UP TO 108 IN THE AFTERNOON.    
FRIDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 107 EARLY IN THE EVENING.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. HOT. HIGHS IN THE UPPER  
90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 105.    
SUNDAY NIGHT
 
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 70S. CHANCE OF RAIN 20 PERCENT.  
HEAT INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE UPPER 80S. CHANCE OF RAIN 20 PERCENT.   
MONDAY NIGHT
 
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF  
SHOWERS. LOWS IN THE UPPER 60S.    
TUESDAY
 
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.    
TUESDAY NIGHT
 
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AFTER  
MIDNIGHT. LOWS IN THE LOWER 70S. CHANCE OF RAIN 20 PERCENT.    
WEDNESDAY
 
MOSTLY SUNNY. HIGHS IN THE LOWER 90S.  
 

 
 
MOZ042-130900-  
AUDRAIN MO-  
INCLUDING THE CITY OF MEXICO  
853 PM CDT WED AUG 12 2026  
   
..HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS  
AFTER MIDNIGHT. LOWS IN THE LOWER 70S. SOUTHEAST WINDS 5 TO  
10 MPH. CHANCE OF RAIN 20 PERCENT.    
THURSDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN  
THE MORNING. HUMID WITH HIGHS IN THE LOWER 90S. SOUTH WINDS 5 TO  
10 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 105 IN  
THE AFTERNOON.    
THURSDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN BECOMING  
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS IN THE  
MID 70S. SOUTH WINDS 5 TO 10 MPH. CHANCE OF RAIN 20 PERCENT. HEAT  
INDEX VALUES UP TO 104 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HIGHS IN THE LOWER 90S. SOUTHWEST WINDS  
5 TO 10 MPH. HEAT INDEX VALUES UP TO 104.    
FRIDAY NIGHT
 
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE MID 70S. SOUTH WINDS  
5 TO 10 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO  
104 EARLY IN THE EVENING.    
SATURDAY
 
MOSTLY SUNNY. HIGHS IN THE LOWER 90S. HEAT INDEX  
VALUES UP TO 100.    
SATURDAY NIGHT AND SUNDAY
 
MOSTLY CLEAR. LOWS IN THE MID 70S.  
HIGHS IN THE LOWER 90S. HEAT INDEX VALUES UP TO 100.    
SUNDAY NIGHT
 
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLOUDY WITH A CHANCE OF  
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 60S.  
CHANCE OF RAIN 40 PERCENT. HEAT INDEX VALUES UP TO 100 EARLY IN  
THE EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE MID 80S. CHANCE OF RAIN 20 PERCENT.    
MONDAY NIGHT THROUGH TUESDAY NIGHT
 
PARTLY CLOUDY WITH A  
20 PERCENT CHANCE OF SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE  
MID 80S.    
WEDNESDAY
 
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE MORNING. HIGHS IN THE UPPER 80S. CHANCE OF  
RAIN 20 PERCENT.  
 

 
 
MOZ041-047-048-130900-  
BOONE MO-MONITEAU MO-COLE MO-  
INCLUDING THE CITIES OF COLUMBIA AND JEFFERSON CITY  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS THIS  
EVENING. LOWS IN THE MID 70S. SOUTH WINDS AROUND 5 MPH. CHANCE OF  
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 104 EARLY THIS EVENING.    
THURSDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S. SOUTH  
WINDS 5 TO 10 MPH. HEAT INDEX VALUES UP TO 108 IN THE AFTERNOON.    
THURSDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE UPPER 70S. SOUTH  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 108 EARLY IN THE  
EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.  
SOUTHWEST WINDS 5 TO 10 MPH. HEAT INDEX VALUES UP TO 109 IN THE  
AFTERNOON.    
FRIDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN PARTLY CLOUDY  
WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
LOWS IN THE UPPER 70S. SOUTH WINDS AROUND 5 MPH. CHANCE OF RAIN  
20 PERCENT. HEAT INDEX VALUES UP TO 108 EARLY IN THE EVENING.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. HOT. HIGHS IN THE UPPER  
90S. LOWS IN THE UPPER 70S. HEAT INDEX VALUES UP TO 105.    
SUNDAY NIGHT
 
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 70S. CHANCE OF RAIN 20 PERCENT.  
HEAT INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE UPPER 80S. CHANCE OF RAIN 20 PERCENT.   
MONDAY NIGHT
 
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF  
SHOWERS. LOWS AROUND 70.    
TUESDAY
 
MOSTLY SUNNY. HIGHS AROUND 90.    
TUESDAY NIGHT AND WEDNESDAY
 
PARTLY CLOUDY. A SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 70S. HIGHS IN THE  
LOWER 90S. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO  
100.  
 

 
 
ILZ095>097-MOZ018-019-026-027-130900-  
ADAMS IL-BROWN IL-PIKE IL-KNOX MO-LEWIS MO-SHELBY MO-MARION MO-  
INCLUDING THE CITIES OF QUINCY, MOUNT STERLING, PITTSFIELD,  
AND HANNIBAL  
853 PM CDT WED AUG 12 2026  
   
TONIGHT
 
PARTLY CLOUDY. SCATTERED SHOWERS AND THUNDERSTORMS  
AFTER MIDNIGHT. LOWS IN THE LOWER 70S. EAST WINDS AROUND 5 MPH.  
CHANCE OF RAIN 30 PERCENT.    
THURSDAY
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND  
THUNDERSTORMS IN THE MORNING, THEN MOSTLY SUNNY WITH ISOLATED  
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. HUMID WITH HIGHS IN  
THE LOWER 90S. EAST WINDS 5 TO 10 MPH. CHANCE OF RAIN 40 PERCENT.  
HEAT INDEX VALUES UP TO 105 IN THE AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLOUDY WITH SCATTERED  
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. HUMID WITH LOWS IN THE  
LOWER 70S. EAST WINDS 5 TO 10 MPH. CHANCE OF RAIN 40 PERCENT.  
HEAT INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
FRIDAY
 
PARTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE  
MORNING. HUMID WITH HIGHS IN THE LOWER 90S. EAST WINDS AROUND  
5 MPH, BECOMING SOUTH IN THE AFTERNOON. CHANCE OF RAIN  
20 PERCENT. HEAT INDEX VALUES UP TO 106 IN THE AFTERNOON.    
FRIDAY NIGHT
 
PARTLY CLOUDY. A CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. HUMID WITH LOWS IN THE MID 70S.  
SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF RAIN 50 PERCENT. HEAT  
INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
SATURDAY
 
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE MORNING. HIGHS IN THE LOWER 90S. CHANCE OF  
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 105 IN THE AFTERNOON.    
SATURDAY NIGHT
 
PARTLY CLOUDY. LOWS IN THE MID 70S. HEAT INDEX  
VALUES UP TO 105 EARLY IN THE EVENING.    
SUNDAY
 
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S. CHANCE OF  
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 105.    
SUNDAY NIGHT
 
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 60S. CHANCE OF RAIN 30 PERCENT.  
HEAT INDEX VALUES UP TO 100 EARLY IN THE EVENING.    
MONDAY
 
MOSTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS. A SLIGHT  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE MID 80S.  
CHANCE OF RAIN 20 PERCENT.    
MONDAY NIGHT AND TUESDAY
 
PARTLY CLOUDY. A 20 PERCENT CHANCE OF  
SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE MID 80S.    
TUESDAY NIGHT AND WEDNESDAY
 
PARTLY CLOUDY. A SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S. HIGHS IN THE  
UPPER 80S. CHANCE OF RAIN 20 PERCENT.  
 

 
 
MOZ034>036-130900-  
MONROE MO-RALLS MO-PIKE MO-  
INCLUDING THE CITY OF BOWLING GREEN  
853 PM CDT WED AUG 12 2026  
   
..HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
PARTLY CLOUDY. SCATTERED SHOWERS AND THUNDERSTORMS  
AFTER MIDNIGHT. LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND  
5 MPH, BECOMING EAST AROUND 5 MPH AFTER MIDNIGHT. CHANCE OF RAIN  
30 PERCENT.    
THURSDAY
 
MOSTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS IN  
THE MORNING. HUMID WITH HIGHS IN THE LOWER 90S. SOUTHEAST WINDS  
5 TO 10 MPH. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO  
107 IN THE AFTERNOON.    
THURSDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN BECOMING  
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. HUMID WITH  
LOWS IN THE MID 70S. SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF RAIN  
20 PERCENT. HEAT INDEX VALUES UP TO 106 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HUMID WITH HIGHS IN THE MID 90S. SOUTH  
WINDS 5 TO 10 MPH. HEAT INDEX VALUES UP TO 106 IN THE AFTERNOON.    
FRIDAY NIGHT
 
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO  
107 EARLY IN THE EVENING.    
SATURDAY
 
MOSTLY SUNNY. HIGHS IN THE MID 90S. HEAT INDEX VALUES  
UP TO 105.    
SATURDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. HEAT INDEX  
VALUES UP TO 105 EARLY IN THE EVENING.    
SUNDAY
 
MOSTLY SUNNY. HIGHS IN THE LOWER 90S. HEAT INDEX VALUES  
UP TO 105.    
SUNDAY NIGHT
 
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLOUDY WITH A CHANCE OF  
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. LOWS AROUND 70. CHANCE  
OF RAIN 40 PERCENT. HEAT INDEX VALUES UP TO 100 EARLY IN THE  
EVENING.    
MONDAY
 
MOSTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE MID 80S. CHANCE OF RAIN 20 PERCENT.    
MONDAY NIGHT AND TUESDAY
 
PARTLY CLOUDY. A 20 PERCENT CHANCE OF  
SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE MID 80S.    
TUESDAY NIGHT AND WEDNESDAY
 
PARTLY CLOUDY. A SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 60S. HIGHS IN THE  
UPPER 80S. CHANCE OF RAIN 20 PERCENT.  
 

 
 
ILZ069-074-130900-  
CLINTON IL-WASHINGTON IL-  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 70S. SOUTH WINDS AROUND 5 MPH.  
CHANCE OF RAIN 40 PERCENT. HEAT INDEX VALUES UP TO 102 EARLY THIS  
EVENING.    
THURSDAY
 
PARTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY IN THE MORNING. HUMID WITH HIGHS IN THE MID 90S. SOUTH  
WINDS AROUND 5 MPH. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES  
UP TO 111 IN THE AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING. HUMID WITH LOWS IN THE UPPER 70S.  
SOUTH WINDS 5 TO 10 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX  
VALUES UP TO 110 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. SOUTHWEST  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 112 IN THE AFTERNOON.   
FRIDAY NIGHT
 
MOSTLY CLEAR. HUMID WITH LOWS IN THE MID 70S.  
SOUTH WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 110 EARLY IN  
THE EVENING.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. HOT. HIGHS IN THE UPPER  
90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 110.    
SUNDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN PARTLY CLOUDY  
WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
LOWS IN THE LOWER 70S. CHANCE OF RAIN 20 PERCENT. HEAT INDEX  
VALUES UP TO 105 EARLY IN THE EVENING.    
MONDAY
 
MOSTLY SUNNY WITH A SLIGHT CHANCE OF THUNDERSTORMS. A  
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS  
IN THE AFTERNOON. HIGHS IN THE UPPER 80S. CHANCE OF RAIN  
30 PERCENT.    
MONDAY NIGHT THROUGH TUESDAY NIGHT
 
PARTLY CLOUDY WITH A  
20 PERCENT CHANCE OF SHOWERS. LOWS AROUND 70. HIGHS IN THE UPPER  
80S.    
WEDNESDAY
 
MOSTLY SUNNY. HIGHS IN THE LOWER 90S. HEAT INDEX  
VALUES UP TO 100.  
 

 
 
ILZ070-130900-  
MARION IL-  
INCLUDING THE CITIES OF CENTRALIA AND SALEM  
853 PM CDT WED AUG 12 2026  
   
..HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND  
5 MPH. CHANCE OF RAIN 40 PERCENT.    
THURSDAY
 
PARTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY IN THE MORNING. HUMID WITH HIGHS IN THE LOWER 90S.  
SOUTHEAST WINDS AROUND 5 MPH, BECOMING SOUTHWEST AROUND 5 MPH IN  
THE AFTERNOON. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO  
106 IN THE AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING. HUMID WITH LOWS IN THE MID 70S.  
SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT. HEAT  
INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. SOUTH  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 108.    
FRIDAY NIGHT
 
MOSTLY CLEAR. HUMID WITH LOWS IN THE MID 70S.  
SOUTH WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 105 EARLY IN  
THE EVENING.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. HOT. HIGHS IN THE MID  
90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 105.    
SUNDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN PARTLY CLOUDY  
WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
LOWS IN THE LOWER 70S. CHANCE OF RAIN 20 PERCENT. HEAT INDEX  
VALUES UP TO 105 EARLY IN THE EVENING.    
MONDAY
 
MOSTLY SUNNY WITH A SLIGHT CHANCE OF THUNDERSTORMS. A  
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS  
IN THE AFTERNOON. HIGHS IN THE UPPER 80S. CHANCE OF RAIN  
30 PERCENT.    
MONDAY NIGHT THROUGH TUESDAY NIGHT
 
PARTLY CLOUDY WITH A  
20 PERCENT CHANCE OF SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE  
UPPER 80S.    
WEDNESDAY
 
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. CHANCE OF RAIN  
20 PERCENT.  
 

 
 
MOZ074-084-085-099-130900-  
SAINT FRANCOIS MO-IRON MO-MADISON MO-REYNOLDS MO-  
INCLUDING THE CITY OF FARMINGTON  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY. SCATTERED SHOWERS AND THUNDERSTORMS  
THIS EVENING. LOWS IN THE MID 70S. SOUTH WINDS AROUND 5 MPH.  
CHANCE OF RAIN 50 PERCENT. HEAT INDEX VALUES UP TO 104 EARLY THIS  
EVENING.    
THURSDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.  
SOUTHWEST WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 107.    
THURSDAY NIGHT
 
PARTLY CLOUDY IN THE EVENING, THEN BECOMING  
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS AROUND 5 MPH. HEAT  
INDEX VALUES UP TO 104 EARLY IN THE EVENING.    
FRIDAY
 
SUNNY, HOT WITH HIGHS IN THE UPPER 90S. SOUTHWEST WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 107.    
FRIDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 106 EARLY IN THE EVENING.    
SATURDAY THROUGH SUNDAY NIGHT
 
MOSTLY CLEAR. HOT. HIGHS IN THE  
UPPER 90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 105.    
MONDAY
 
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS IN  
THE AFTERNOON. HIGHS IN THE LOWER 90S. CHANCE OF RAIN 30 PERCENT.   
MONDAY NIGHT
 
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE EVENING. LOWS AROUND 70. CHANCE OF RAIN  
20 PERCENT.    
TUESDAY
 
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS IN THE  
AFTERNOON. HIGHS AROUND 90. CHANCE OF RAIN 20 PERCENT.    
TUESDAY NIGHT AND WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER  
70S. HIGHS IN THE LOWER 90S.  
 

 
 
MOZ051-060-130900-  
MONTGOMERY MO-WARREN MO-  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF  
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 103 EARLY THIS EVENING.    
THURSDAY
 
MOSTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY IN THE MORNING. HOT WITH HIGHS IN THE MID 90S. SOUTH WINDS  
AROUND 5 MPH. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO  
109 IN THE AFTERNOON.    
THURSDAY NIGHT
 
MOSTLY CLEAR WITH ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT.  
LOWS IN THE MID 70S. SOUTH WINDS AROUND 5 MPH. CHANCE OF RAIN  
20 PERCENT. HEAT INDEX VALUES UP TO 108 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. SOUTHWEST  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 109 IN THE AFTERNOON.   
FRIDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 109 EARLY IN THE EVENING.    
SATURDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. HEAT  
INDEX VALUES UP TO 105 IN THE AFTERNOON.    
SATURDAY NIGHT AND SUNDAY
 
MOSTLY CLEAR. HOT. LOWS IN THE LOWER  
70S. HIGHS IN THE MID 90S. HEAT INDEX VALUES UP TO 110.    
SUNDAY NIGHT
 
PARTLY CLOUDY. A CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. LOWS AROUND 70. CHANCE OF RAIN  
30 PERCENT. HEAT INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE UPPER 80S. CHANCE OF RAIN 20 PERCENT.   
MONDAY NIGHT THROUGH TUESDAY NIGHT
 
PARTLY CLOUDY WITH A  
20 PERCENT CHANCE OF SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE  
UPPER 80S.    
WEDNESDAY
 
MOSTLY SUNNY. HIGHS AROUND 90.  
 

 
 
MOZ052-130900-  
LINCOLN MO-  
853 PM CDT WED AUG 12 2026  
   
..HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS THIS  
EVENING, THEN SCATTERED SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
LOWS IN THE LOWER 70S. NORTHWEST WINDS AROUND 5 MPH, BECOMING  
EAST AFTER MIDNIGHT. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES  
UP TO 100 EARLY THIS EVENING.    
THURSDAY
 
MOSTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY IN THE MORNING. HOT WITH HIGHS IN THE MID 90S. SOUTH WINDS  
AROUND 5 MPH. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO  
109 IN THE AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. HUMID WITH LOWS IN THE MID 70S. SOUTH WINDS AROUND  
5 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO  
108 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. SOUTHWEST  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 110 IN THE AFTERNOON.   
FRIDAY NIGHT
 
MOSTLY CLEAR. HUMID WITH LOWS IN THE MID 70S.  
SOUTH WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 110 EARLY IN  
THE EVENING.    
SATURDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. HEAT  
INDEX VALUES UP TO 110 IN THE AFTERNOON.    
SATURDAY NIGHT AND SUNDAY
 
MOSTLY CLEAR. HOT. LOWS IN THE MID  
70S. HIGHS IN THE MID 90S. HEAT INDEX VALUES UP TO 110.    
SUNDAY NIGHT
 
PARTLY CLOUDY. A CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 70S. CHANCE OF  
RAIN 30 PERCENT. HEAT INDEX VALUES UP TO 105 EARLY IN THE  
EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE UPPER 80S. CHANCE OF RAIN 20 PERCENT.   
MONDAY NIGHT AND TUESDAY
 
PARTLY CLOUDY. A 20 PERCENT CHANCE OF  
SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE UPPER 80S.    
TUESDAY NIGHT AND WEDNESDAY
 
PARTLY CLOUDY. LOWS AROUND 70.  
HIGHS AROUND 90.  
 

 
 
ILZ058-059-098-099-130900-  
GREENE IL-MACOUPIN IL-CALHOUN IL-JERSEY IL-  
853 PM CDT WED AUG 12 2026  
   
..HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS THIS  
EVENING, THEN SCATTERED SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF  
RAIN 30 PERCENT.    
THURSDAY
 
PARTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY IN THE MORNING. HUMID WITH HIGHS IN THE LOWER 90S.  
SOUTHEAST WINDS 5 TO 10 MPH. CHANCE OF RAIN 30 PERCENT. HEAT  
INDEX VALUES UP TO 107 IN THE AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. HUMID WITH LOWS IN THE LOWER 70S. SOUTHEAST WINDS  
5 TO 10 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO  
106 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HUMID WITH HIGHS IN THE MID 90S. SOUTH  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 107 IN THE AFTERNOON.   
FRIDAY NIGHT
 
PARTLY CLOUDY. HUMID WITH LOWS IN THE MID 70S.  
SOUTHEAST WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 107 EARLY  
IN THE EVENING.    
SATURDAY
 
MOSTLY SUNNY. HIGHS IN THE MID 90S. HEAT INDEX VALUES  
UP TO 105 IN THE AFTERNOON.    
SATURDAY NIGHT AND SUNDAY
 
MOSTLY CLEAR. LOWS IN THE MID 70S.  
HIGHS IN THE MID 90S. HEAT INDEX VALUES UP TO 105.    
SUNDAY NIGHT
 
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN A CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. LOWS AROUND 70. CHANCE OF RAIN  
30 PERCENT. HEAT INDEX VALUES UP TO 105 EARLY IN THE EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE MID 80S. CHANCE OF RAIN 20 PERCENT.    
MONDAY NIGHT THROUGH TUESDAY NIGHT
 
PARTLY CLOUDY WITH A  
20 PERCENT CHANCE OF SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE  
MID 80S.    
WEDNESDAY
 
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.  
 

 
 
ILZ060-064-065-130900-  
MONTGOMERY IL-BOND IL-FAYETTE IL-  
INCLUDING THE CITIES OF LITCHFIELD AND VANDALIA  
853 PM CDT WED AUG 12 2026  
   
..HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND  
5 MPH. CHANCE OF RAIN 30 PERCENT.    
THURSDAY
 
PARTLY SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY IN THE MORNING. HUMID WITH HIGHS IN THE LOWER 90S.  
SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF RAIN 30 PERCENT. HEAT  
INDEX VALUES UP TO 107 IN THE AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. HUMID WITH LOWS IN THE MID 70S. SOUTHEAST WINDS  
5 TO 10 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO  
105 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HUMID WITH HIGHS IN THE LOWER 90S. SOUTH  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 107.    
FRIDAY NIGHT
 
MOSTLY CLEAR. HUMID WITH LOWS IN THE MID 70S.  
SOUTHEAST WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 107 EARLY  
IN THE EVENING.    
SATURDAY
 
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE MORNING. HIGHS IN THE MID 90S. CHANCE OF  
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 105 IN THE AFTERNOON.    
SATURDAY NIGHT AND SUNDAY
 
MOSTLY CLEAR. LOWS IN THE MID 70S.  
HIGHS IN THE MID 90S. HEAT INDEX VALUES UP TO 105.    
SUNDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN PARTLY CLOUDY  
WITH A CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. LOWS  
IN THE LOWER 70S. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP  
TO 105 EARLY IN THE EVENING.    
MONDAY
 
MOSTLY SUNNY WITH A SLIGHT CHANCE OF THUNDERSTORMS. A  
SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN A CHANCE OF SHOWERS  
IN THE AFTERNOON. HIGHS IN THE MID 80S. CHANCE OF RAIN  
30 PERCENT.    
MONDAY NIGHT THROUGH TUESDAY NIGHT
 
PARTLY CLOUDY WITH A  
20 PERCENT CHANCE OF SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE  
MID 80S.    
WEDNESDAY
 
MOSTLY SUNNY. HIGHS IN THE UPPER 80S.  
 

 
 
ILZ079-MOZ075-130900-  
RANDOLPH IL-SAINTE GENEVIEVE MO-  
INCLUDING THE CITIES OF CHESTER AND SPARTA  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY THIS EVENING. LOWS IN THE MID 70S. SOUTH WINDS 5 TO  
10 MPH. GUSTS UP TO 25 MPH THIS EVENING. CHANCE OF RAIN  
50 PERCENT. HEAT INDEX VALUES UP TO 106 EARLY THIS EVENING.    
THURSDAY
 
MOSTLY SUNNY WITH ISOLATED SHOWERS AND THUNDERSTORMS.  
HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS AROUND 5 MPH.  
CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 110.    
THURSDAY NIGHT
 
PARTLY CLOUDY IN THE EVENING, THEN CLEARING.  
HUMID WITH LOWS IN THE MID 70S. SOUTH WINDS 5 TO 10 MPH. HEAT  
INDEX VALUES UP TO 109 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.  
SOUTHWEST WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 111.    
FRIDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 110 EARLY IN THE EVENING.    
SATURDAY THROUGH SUNDAY NIGHT
 
MOSTLY CLEAR. HOT. HIGHS IN THE  
UPPER 90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 110.    
MONDAY
 
MOSTLY SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS IN  
THE AFTERNOON. HIGHS IN THE LOWER 90S. CHANCE OF RAIN 30 PERCENT.  
HEAT INDEX VALUES UP TO 100.    
MONDAY NIGHT AND TUESDAY
 
PARTLY CLOUDY. A 20 PERCENT CHANCE OF  
SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE UPPER 80S.    
TUESDAY NIGHT AND WEDNESDAY
 
PARTLY CLOUDY. LOWS AROUND 70.  
HIGHS IN THE LOWER 90S. HEAT INDEX VALUES UP TO 100.  
 

 
 
MOZ059-062-072-073-130900-  
GASCONADE MO-FRANKLIN MO-CRAWFORD MO-WASHINGTON MO-  
INCLUDING THE CITIES OF WASHINGTON, UNION, AND SULLIVAN  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
PARTLY CLOUDY. SCATTERED SHOWERS AND THUNDERSTORMS  
THIS EVENING. LOWS IN THE MID 70S. SOUTH WINDS AROUND 5 MPH.  
CHANCE OF RAIN 50 PERCENT. HEAT INDEX VALUES UP TO 104 EARLY THIS  
EVENING.    
THURSDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN  
THE AFTERNOON. HOT WITH HIGHS IN THE UPPER 90S. SOUTHWEST WINDS  
AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO  
108.    
THURSDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE UPPER 70S. SOUTH  
WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 107 EARLY IN THE  
EVENING.    
FRIDAY
 
SUNNY, HOT WITH HIGHS IN THE UPPER 90S. SOUTHWEST WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 108.    
FRIDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 108 EARLY IN THE EVENING.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. HOT. HIGHS IN THE UPPER  
90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 105.    
SUNDAY NIGHT
 
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 70S. CHANCE OF  
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 105 EARLY IN THE  
EVENING.    
MONDAY
 
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS AROUND 90. CHANCE OF RAIN 20 PERCENT.    
MONDAY NIGHT
 
A SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.  
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS IN THE UPPER  
60S. CHANCE OF RAIN 20 PERCENT.    
TUESDAY THROUGH WEDNESDAY
 
PARTLY CLOUDY. HIGHS IN THE LOWER  
90S. LOWS IN THE LOWER 70S.  
 

 
 
ILZ102-MOZ065-130900-  
MONROE IL-JEFFERSON MO-  
853 PM CDT WED AUG 12 2026  
   
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT SATURDAY
 
 
   
TONIGHT
 
MOSTLY CLOUDY. SCATTERED SHOWERS AND THUNDERSTORMS,  
MAINLY THIS EVENING. LOWS IN THE MID 70S. SOUTH WINDS AROUND  
5 MPH. GUSTS UP TO 20 MPH THIS EVENING. CHANCE OF RAIN  
50 PERCENT. HEAT INDEX VALUES UP TO 106 EARLY THIS EVENING.    
THURSDAY
 
MOSTLY SUNNY WITH ISOLATED SHOWERS AND THUNDERSTORMS.  
HOT WITH HIGHS IN THE UPPER 90S. SOUTHWEST WINDS AROUND 5 MPH.  
CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 112 IN THE  
AFTERNOON.    
THURSDAY NIGHT
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLEAR AFTER MIDNIGHT.  
LOWS IN THE UPPER 70S. SOUTH WINDS AROUND 5 MPH. CHANCE OF RAIN  
20 PERCENT. HEAT INDEX VALUES UP TO 109 EARLY IN THE EVENING.    
FRIDAY
 
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.  
SOUTHWEST WINDS AROUND 5 MPH. HEAT INDEX VALUES UP TO 112.    
FRIDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 70S. SOUTH WINDS  
AROUND 5 MPH. HEAT INDEX VALUES UP TO 111 EARLY IN THE EVENING.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. HOT. HIGHS IN THE UPPER  
90S. LOWS IN THE MID 70S. HEAT INDEX VALUES UP TO 110.    
SUNDAY NIGHT
 
MOSTLY CLEAR IN THE EVENING, THEN PARTLY CLOUDY  
WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
LOWS IN THE LOWER 70S. CHANCE OF RAIN 20 PERCENT. HEAT INDEX  
VALUES UP TO 110 EARLY IN THE EVENING.    
MONDAY
 
PARTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. CHANCE OF RAIN  
20 PERCENT. HEAT INDEX VALUES UP TO 100.    
MONDAY NIGHT AND TUESDAY
 
PARTLY CLOUDY. A 20 PERCENT CHANCE OF  
SHOWERS. LOWS IN THE UPPER 60S. HIGHS IN THE UPPER 80S.    
TUESDAY NIGHT AND WEDNESDAY
 
PARTLY CLOUDY. LOWS AROUND 70.  
HIGHS IN THE LOWER 90S. HEAT INDEX VALUES UP TO 100.  
 

 
 
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