228
FPUS53 KLSX 181543
ZFPLSX
ZONE FORECASTS
NATIONAL WEATHER SERVICE SAINT LOUIS MO
1042 AM CDT FRI SEP 18 2026
ILZ100-101-MOZ061-063-064-182300-
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
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HOT WITH HIGHS IN THE MID 90S. EAST WINDS AROUND 5 MPH, BECOMING
SOUTHEAST. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO
107.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 70S. SOUTHEAST
WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES
UP TO 102 EARLY IN THE EVENING.
SATURDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.
SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 70S. SOUTH WINDS AROUND 5 MPH.
SUNDAY
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S.
WEST WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE UPPER 60S. HIGHS IN THE LOWER 80S.
CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF THUNDERSTORMS. LOWS AROUND 60. CHANCE OF RAIN
40 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE LOWER
70S. LOWS IN THE MID 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE MID 50S.
MOZ049-182300-
OSAGE MO-
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS AROUND 5 MPH.
CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO 105.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 70S. SOUTH WINDS
AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SATURDAY
PARTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.
SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 70S. SOUTHWEST
WINDS AROUND 5 MPH.
SUNDAY
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S.
WEST WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS IN THE UPPER 70S.
CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS, MAINLY IN THE
EVENING. LOWS IN THE UPPER 50S. CHANCE OF RAIN 50 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE LOWER
70S. LOWS IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE MID 50S.
MOZ042-182300-
AUDRAIN MO-
INCLUDING THE CITY OF MEXICO
1042 AM CDT FRI SEP 18 2026
THIS AFTERNOON
SUNNY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS AROUND 90. SOUTHEAST WINDS AROUND 5 MPH,
BECOMING SOUTH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP
TO 100.
TONIGHT
MOSTLY CLEAR WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT.
LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF
RAIN 20 PERCENT.
SATURDAY
PARTLY SUNNY IN THE MORNING, THEN BECOMING MOSTLY
CLOUDY. HIGHS IN THE LOWER 90S. SOUTHWEST WINDS 5 TO 10 MPH WITH
GUSTS UP TO 20 MPH.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY
CLOUDY WITH A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 60S. SOUTHWEST
WINDS AROUND 5 MPH. CHANCE OF RAIN 40 PERCENT.
SUNDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. A SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE MID 80S.
NORTHWEST WINDS 5 TO 10 MPH. CHANCE OF RAIN 50 PERCENT.
SUNDAY NIGHT
A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY. LOWS
IN THE LOWER 60S. CHANCE OF RAIN 70 PERCENT.
MONDAY
A SLIGHT CHANCE OF THUNDERSTORMS. SHOWERS LIKELY,
MAINLY IN THE MORNING. COOLER WITH HIGHS IN THE LOWER 70S. CHANCE
OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS, MAINLY IN THE
EVENING. LOWS IN THE MID 50S. CHANCE OF RAIN 50 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE MID 60S.
LOWS IN THE UPPER 40S.
WEDNESDAY AND WEDNESDAY NIGHT
PARTLY CLOUDY. HIGHS AROUND 70.
LOWS IN THE LOWER 50S.
THURSDAY
PARTLY SUNNY. HIGHS IN THE LOWER 70S.
MOZ050-182300-
CALLAWAY MO-
INCLUDING THE CITY OF FULTON
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HIGHS IN THE LOWER 90S. SOUTHEAST WINDS AROUND 5 MPH, BECOMING
SOUTH AROUND 5 MPH. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES
UP TO 104.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 70S. SOUTHEAST
WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SATURDAY
PARTLY SUNNY IN THE MORNING, THEN BECOMING MOSTLY
CLOUDY. HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS 5 TO
10 MPH.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY
CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. LOWS AROUND 70. SOUTHWEST WINDS AROUND 5 MPH. CHANCE OF
RAIN 20 PERCENT.
SUNDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. A SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. WEST
WINDS AROUND 5 MPH. CHANCE OF RAIN 50 PERCENT.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS IN THE MID 70S. CHANCE
OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS, MAINLY IN THE
EVENING. LOWS IN THE UPPER 50S. CHANCE OF RAIN 50 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE UPPER
60S. LOWS IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE LOWER
70S. LOWS IN THE LOWER 50S.
MOZ047-048-182300-
MONITEAU MO-COLE MO-
INCLUDING THE CITY OF JEFFERSON CITY
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A SLIGHT CHANCE OF 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
105.
TONIGHT
MOSTLY CLEAR WITH A SLIGHT CHANCE OF 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 101 EARLY IN THE EVENING.
SATURDAY
PARTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.
SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY
CLOUDY WITH A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 70S. SOUTHWEST
WINDS AROUND 5 MPH. CHANCE OF RAIN 30 PERCENT.
SUNDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. A SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. WEST WINDS
AROUND 5 MPH. CHANCE OF RAIN 50 PERCENT.
SUNDAY NIGHT
A CHANCE OF THUNDERSTORMS. SHOWERS. LOWS IN THE
MID 60S. CHANCE OF RAIN 80 PERCENT.
MONDAY
A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY, MAINLY IN
THE MORNING. COOLER WITH HIGHS IN THE UPPER 70S. CHANCE OF RAIN
70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN THE
EVENING. LOWS IN THE UPPER 50S. CHANCE OF RAIN 20 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE LOWER
70S. LOWS IN THE MID 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE MID 50S.
MOZ041-182300-
BOONE MO-
INCLUDING THE CITY OF COLUMBIA
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING
THIS AFTERNOON
SUNNY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 90S. SOUTHEAST WINDS AROUND
5 MPH, BECOMING SOUTH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX
VALUES UP TO 104.
TONIGHT
MOSTLY CLEAR WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN PARTLY CLOUDY AFTER MIDNIGHT.
LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF
RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 101 EARLY IN THE
EVENING.
SATURDAY
PARTLY SUNNY IN THE MORNING, THEN BECOMING MOSTLY
CLOUDY. HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS 5 TO
10 MPH WITH GUSTS UP TO 20 MPH.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY
CLOUDY WITH A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. LOWS AROUND 70. SOUTHWEST WINDS
AROUND 5 MPH. CHANCE OF RAIN 40 PERCENT.
SUNDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. A SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. NOT AS WARM WITH HIGHS IN THE
MID 80S. WEST WINDS AROUND 5 MPH. CHANCE OF RAIN 50 PERCENT.
SUNDAY NIGHT
A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY. LOWS
IN THE MID 60S. CHANCE OF RAIN 70 PERCENT.
MONDAY
A SLIGHT CHANCE OF THUNDERSTORMS. SHOWERS LIKELY,
MAINLY IN THE MORNING. COOLER WITH HIGHS IN THE MID 70S. CHANCE
OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN THE
EVENING. LOWS IN THE UPPER 50S. CHANCE OF RAIN 20 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE UPPER
60S. LOWS IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE LOWER
70S. LOWS IN THE LOWER 50S.
ILZ095>097-MOZ018-019-026-027-034>036-182300-
ADAMS IL-BROWN IL-PIKE IL-KNOX MO-LEWIS MO-SHELBY MO-MARION MO-
MONROE MO-RALLS MO-PIKE MO-
INCLUDING THE CITIES OF QUINCY, MOUNT STERLING, PITTSFIELD,
HANNIBAL, AND BOWLING GREEN
1042 AM CDT FRI SEP 18 2026
THIS AFTERNOON
MOSTLY SUNNY. HIGHS IN THE UPPER 80S. EAST
WINDS AROUND 5 MPH.
TONIGHT
MOSTLY CLEAR IN THE EVENING, THEN BECOMING PARTLY
CLOUDY. HUMID WITH LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND
5 MPH.
SATURDAY
PARTLY SUNNY IN THE MORNING, THEN BECOMING MOSTLY
CLOUDY. HIGHS IN THE LOWER 90S. SOUTHWEST WINDS 5 TO 10 MPH WITH
GUSTS UP TO 20 MPH.
SATURDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN MOSTLY
CLOUDY WITH A CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
LOWS IN THE UPPER 60S. SOUTH WINDS AROUND 5 MPH, BECOMING
NORTHWEST AFTER MIDNIGHT. CHANCE OF RAIN 50 PERCENT.
SUNDAY
MOSTLY CLOUDY. SHOWERS LIKELY IN THE MORNING, THEN A
CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. COOLER WITH HIGHS IN THE LOWER 80S. NORTHWEST WINDS
AROUND 5 MPH. CHANCE OF RAIN 70 PERCENT.
SUNDAY NIGHT
A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY. LOWS
IN THE LOWER 60S. CHANCE OF RAIN 70 PERCENT.
MONDAY
A SLIGHT CHANCE OF THUNDERSTORMS. SHOWERS LIKELY,
MAINLY IN THE MORNING. COOLER WITH HIGHS IN THE UPPER 60S. CHANCE
OF RAIN 70 PERCENT.
MONDAY NIGHT
A SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS. LOWS IN THE MID
50S. CHANCE OF RAIN 20 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE MID 60S.
LOWS AROUND 50.
WEDNESDAY AND WEDNESDAY NIGHT
PARTLY CLOUDY. HIGHS IN THE
UPPER 60S. LOWS IN THE LOWER 50S.
THURSDAY
PARTLY SUNNY. HIGHS IN THE LOWER 70S.
ILZ069-070-074-182300-
CLINTON IL-MARION IL-WASHINGTON IL-
INCLUDING THE CITIES OF CENTRALIA AND SALEM
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HOT WITH HIGHS IN THE MID 90S. NORTHEAST WINDS AROUND 5 MPH,
BECOMING NORTH. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP
TO 106.
TONIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLEAR AFTER MIDNIGHT.
HUMID WITH LOWS IN THE LOWER 70S. SOUTHEAST WINDS AROUND 5 MPH.
CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 102 EARLY IN
THE EVENING.
SATURDAY
SUNNY, HOT WITH HIGHS IN THE UPPER 90S. SOUTHWEST
WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 70S. SOUTH WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON. HIGHS IN THE LOWER 90S. WEST WINDS AROUND 5 MPH.
CHANCE OF RAIN 20 PERCENT.
SUNDAY NIGHT
MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN A CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 60S. CHANCE OF
RAIN 50 PERCENT.
MONDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS IN THE MORNING,
THEN PARTLY SUNNY WITH SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE MID 80S. CHANCE OF
RAIN 60 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF THUNDERSTORMS. LOWS AROUND 60. CHANCE OF RAIN
40 PERCENT.
TUESDAY
PARTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING. COOLER WITH HIGHS IN THE MID 70S.
CHANCE OF RAIN 20 PERCENT.
TUESDAY NIGHT THROUGH THURSDAY
PARTLY CLOUDY. LOWS IN THE MID
50S. HIGHS IN THE MID 70S.
MOZ074-084-085-099-182300-
SAINT FRANCOIS MO-IRON MO-MADISON MO-REYNOLDS MO-
INCLUDING THE CITY OF FARMINGTON
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A SLIGHT CHANCE OF 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
105.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS AROUND 70. LIGHT AND VARIABLE
WINDS, BECOMING SOUTH AROUND 5 MPH AFTER MIDNIGHT. CHANCE OF RAIN
20 PERCENT. HEAT INDEX VALUES UP TO 101 EARLY IN THE EVENING.
SATURDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.
SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 70. SOUTHWEST WINDS
AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. WEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
PARTLY CLOUDY IN THE EVENING, THEN BECOMING
MOSTLY CLOUDY. A SLIGHT CHANCE OF THUNDERSTORMS. A SLIGHT CHANCE
OF SHOWERS IN THE EVENING, THEN A CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE UPPER 60S. CHANCE OF RAIN 50 PERCENT.
MONDAY
PARTLY SUNNY. A SLIGHT CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. HIGHS IN THE MID 80S. CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLOUDY
WITH A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. LOWS IN THE LOWER
60S. CHANCE OF RAIN 40 PERCENT.
TUESDAY
PARTLY SUNNY. COOLER WITH HIGHS IN THE MID 70S.
TUESDAY NIGHT THROUGH THURSDAY
PARTLY CLOUDY. LOWS IN THE MID
50S. HIGHS IN THE MID 70S.
MOZ060-182300-
WARREN MO-
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HIGHS IN THE MID 90S. EAST WINDS AROUND 5 MPH EARLY, BECOMING
LIGHT AND VARIABLE. CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES
UP TO 106.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS, BECOMING SOUTH AROUND 5 MPH AFTER MIDNIGHT.
CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 101 EARLY IN
THE EVENING.
SATURDAY
MOSTLY SUNNY IN THE MORNING, THEN BECOMING MOSTLY
CLOUDY. HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS AROUND
5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 70. LIGHT AND
VARIABLE WINDS, BECOMING SOUTHWEST AROUND 5 MPH AFTER MIDNIGHT.
SUNDAY
PARTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. WEST
WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS IN THE UPPER 70S.
CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS WITH A SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF RAIN
30 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS AROUND 70. LOWS
IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE LOWER 50S.
MOZ051-052-182300-
MONTGOMERY MO-LINCOLN MO-
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HIGHS IN THE LOWER 90S. EAST WINDS AROUND 5 MPH, BECOMING SOUTH.
CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO 105.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 70S. SOUTHEAST
WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES
UP TO 100 EARLY IN THE EVENING.
SATURDAY
MOSTLY SUNNY IN THE MORNING, THEN BECOMING MOSTLY
CLOUDY. HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS 5 TO
10 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS AROUND 70. SOUTHWEST WINDS
AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SUNDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. A SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S. WEST
WINDS AROUND 5 MPH. CHANCE OF RAIN 40 PERCENT.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE MID 70S.
CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS WITH A SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 50S. CHANCE OF RAIN
50 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE UPPER
60S. LOWS IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE LOWER 50S.
ILZ058-059-098-099-182300-
GREENE IL-MACOUPIN IL-CALHOUN IL-JERSEY IL-
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING
THIS AFTERNOON
SUNNY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. HIGHS IN THE LOWER 90S. EAST WINDS AROUND 5 MPH.
CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 102.
TONIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLEAR AFTER MIDNIGHT.
LOWS AROUND 70. SOUTHEAST WINDS AROUND 5 MPH. CHANCE OF RAIN
20 PERCENT.
SATURDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S.
SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN PARTLY
CLOUDY WITH A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. LOWS AROUND 70. SOUTH WINDS AROUND
5 MPH. CHANCE OF RAIN 40 PERCENT.
SUNDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. A SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 80S.
NORTHWEST WINDS AROUND 5 MPH. CHANCE OF RAIN 50 PERCENT.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE UPPER 70S.
CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF
THUNDERSTORMS. A CHANCE OF SHOWERS, MAINLY IN THE EVENING. LOWS
IN THE MID 50S. CHANCE OF RAIN 50 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS AROUND 70. LOWS
IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE LOWER 50S.
ILZ060-065-182300-
MONTGOMERY IL-FAYETTE IL-
INCLUDING THE CITIES OF LITCHFIELD AND VANDALIA
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HIGHS IN THE LOWER 90S. NORTHEAST WINDS AROUND 5 MPH. CHANCE OF
RAIN 30 PERCENT. HEAT INDEX VALUES UP TO 102.
TONIGHT
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE UPPER 60S. SOUTHEAST
WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SATURDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S.
SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN PARTLY
CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. LOWS AROUND 70. SOUTH WINDS AROUND 5 MPH. CHANCE OF
RAIN 20 PERCENT.
SUNDAY
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS IN THE
MORNING, THEN A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS AROUND 90. SOUTHWEST WINDS
AROUND 5 MPH, BECOMING NORTHWEST AROUND 5 MPH IN THE AFTERNOON.
CHANCE OF RAIN 40 PERCENT.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE UPPER 70S.
CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF
THUNDERSTORMS. A CHANCE OF SHOWERS, MAINLY IN THE EVENING. LOWS
IN THE UPPER 50S. CHANCE OF RAIN 40 PERCENT.
TUESDAY
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING, THEN PARTLY SUNNY IN THE AFTERNOON.
HIGHS IN THE LOWER 70S. CHANCE OF RAIN 20 PERCENT.
TUESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE LOWER 50S.
ILZ064-182300-
BOND IL-
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HIGHS IN THE LOWER 90S. EAST WINDS AROUND 5 MPH. CHANCE OF RAIN
30 PERCENT. HEAT INDEX VALUES UP TO 105.
TONIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLEAR AFTER MIDNIGHT.
HUMID WITH LOWS AROUND 70. SOUTHEAST WINDS AROUND 5 MPH. CHANCE
OF RAIN 20 PERCENT. HEAT INDEX VALUES UP TO 101 EARLY IN THE
EVENING.
SATURDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S.
SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 70S. SOUTH WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 90S. WEST
WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT.
SUNDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 60S. CHANCE OF RAIN 50 PERCENT.
MONDAY
SHOWERS LIKELY. A SLIGHT CHANCE OF THUNDERSTORMS IN THE
MORNING, THEN A CHANCE OF THUNDERSTORMS IN THE AFTERNOON. COOLER
WITH HIGHS IN THE LOWER 80S. CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF
THUNDERSTORMS. A CHANCE OF SHOWERS, MAINLY IN THE EVENING. LOWS
IN THE UPPER 50S. CHANCE OF RAIN 30 PERCENT.
TUESDAY
PARTLY SUNNY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING. HIGHS IN THE LOWER 70S. CHANCE OF
RAIN 20 PERCENT.
TUESDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE LOWER 50S.
ILZ079-MOZ075-182300-
RANDOLPH IL-SAINTE GENEVIEVE MO-
INCLUDING THE CITIES OF CHESTER AND SPARTA
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS AROUND 5 MPH.
CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO 107.
TONIGHT
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLEAR AFTER MIDNIGHT.
LOWS AROUND 70. SOUTH WINDS AROUND 5 MPH. CHANCE OF RAIN
20 PERCENT. HEAT INDEX VALUES UP TO 102 EARLY IN THE EVENING.
SATURDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.
SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 70S. SOUTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE MID 90S. WEST WINDS
AROUND 5 MPH.
SUNDAY NIGHT
MOSTLY CLOUDY. A CHANCE OF SHOWERS WITH A SLIGHT
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 60S.
CHANCE OF RAIN 50 PERCENT.
MONDAY
PARTLY SUNNY. A CHANCE OF SHOWERS IN THE MORNING, THEN
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
NOT AS WARM WITH HIGHS IN THE MID 80S. CHANCE OF RAIN 60 PERCENT.
MONDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF THUNDERSTORMS. LOWS AROUND 60. CHANCE OF RAIN
40 PERCENT.
TUESDAY
PARTLY SUNNY. COOLER WITH HIGHS IN THE MID 70S.
TUESDAY NIGHT THROUGH THURSDAY
PARTLY CLOUDY. LOWS IN THE MID
50S. HIGHS IN THE UPPER 70S.
MOZ059-062-072-073-182300-
GASCONADE MO-FRANKLIN MO-CRAWFORD MO-WASHINGTON MO-
INCLUDING THE CITIES OF WASHINGTON, UNION, AND SULLIVAN
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HOT WITH HIGHS IN THE MID 90S. SOUTHWEST WINDS AROUND 5 MPH.
CHANCE OF RAIN 30 PERCENT. HEAT INDEX VALUES UP TO 106.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 70S. LIGHT AND
VARIABLE WINDS, BECOMING SOUTH AROUND 5 MPH AFTER MIDNIGHT.
CHANCE OF RAIN 20 PERCENT.
SATURDAY
MOSTLY SUNNY. HOT WITH HIGHS IN THE UPPER 90S.
SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 70S. SOUTHWEST
WINDS AROUND 5 MPH.
SUNDAY
MOSTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS. HIGHS
IN THE LOWER 90S. WEST WINDS AROUND 5 MPH.
SUNDAY NIGHT AND MONDAY
SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS AROUND 80. CHANCE OF
RAIN 70 PERCENT.
MONDAY NIGHT
A SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE UPPER 50S.
CHANCE OF RAIN 30 PERCENT.
TUESDAY
MOSTLY CLOUDY IN THE MORNING, THEN BECOMING PARTLY
SUNNY. HIGHS IN THE LOWER 70S.
TUESDAY NIGHT THROUGH THURSDAY
PARTLY CLOUDY. LOWS IN THE
LOWER 50S. HIGHS IN THE MID 70S.
ILZ102-MOZ065-182300-
MONROE IL-JEFFERSON MO-
1042 AM CDT FRI SEP 18 2026
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY
THIS AFTERNOON
SUNNY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
HOT WITH HIGHS IN THE MID 90S. WEST WINDS AROUND 5 MPH EARLY,
BECOMING LIGHT AND VARIABLE. CHANCE OF RAIN 30 PERCENT. HEAT
INDEX VALUES UP TO 109.
TONIGHT
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 70S. SOUTHEAST
WINDS AROUND 5 MPH. CHANCE OF RAIN 20 PERCENT. HEAT INDEX VALUES
UP TO 102 EARLY IN THE EVENING.
SATURDAY
SUNNY IN THE MORNING, THEN BECOMING PARTLY SUNNY. HOT
WITH HIGHS IN THE UPPER 90S. SOUTHWEST WINDS AROUND 5 MPH.
SATURDAY NIGHT
MOSTLY CLOUDY IN THE EVENING, THEN BECOMING
PARTLY CLOUDY. LOWS IN THE LOWER 70S. SOUTHWEST WINDS AROUND
5 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 90S. WEST WINDS AROUND
5 MPH. HEAT INDEX VALUES UP TO 101.
SUNDAY NIGHT
MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN A CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 60S. CHANCE OF
RAIN 50 PERCENT.
MONDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS WITH A SLIGHT
CHANCE OF THUNDERSTORMS IN THE MORNING, THEN PARTLY SUNNY WITH
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
COOLER WITH HIGHS IN THE LOWER 80S. CHANCE OF RAIN 70 PERCENT.
MONDAY NIGHT
A SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE UPPER 50S.
CHANCE OF RAIN 40 PERCENT.
TUESDAY AND TUESDAY NIGHT
MOSTLY CLOUDY. HIGHS IN THE LOWER
70S. LOWS IN THE MID 50S.
WEDNESDAY THROUGH THURSDAY
PARTLY CLOUDY. HIGHS IN THE MID
70S. LOWS IN THE LOWER 50S.
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