333
FPUS53 KLSX 021423
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
923 AM CDT Wed Sep 2 2026

ILZ100-101-MOZ061-063-064-022200-
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
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds 5 to 10 mph. Heat index values up to 106.
.TONIGHT...Mostly clear. Lows in the upper 70s. South winds
around 5 mph. Heat index values up to 104 early in the evening.
.THURSDAY...Sunny, hot with highs in the upper 90s. Southwest
winds 5 to 10 mph.
.THURSDAY NIGHT...Mostly clear. Lows in the upper 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.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the upper 70s. Heat index values up to 105 early
in the evening.
.SATURDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Hot with highs in the upper 90s. Chance of rain
20 percent. Heat index values up to 105.
.SATURDAY NIGHT...Partly cloudy in the evening, then clearing. A
20 percent chance of showers. 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 mid 90s. Chance of
rain 20 percent. Heat index values up to 100.
.SUNDAY NIGHT AND LABOR DAY...Partly cloudy. Lows in the lower
70s. Highs in the lower 90s.
.MONDAY NIGHT...A slight chance of thunderstorms in the evening.
Partly cloudy with a slight chance of showers. Lows around 70.
Chance of rain 20 percent.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

MOZ042-049-050-022200-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the mid 90s. Southwest
winds 5 to 10 mph.
.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 101 early in the evening.
.THURSDAY...Sunny, hot with highs in the mid 90s. Southwest winds
5 to 10 mph.
.THURSDAY NIGHT...Mostly clear. Lows in the upper 70s. South
winds around 5 mph. Heat index values up to 101 early in the
evening.
.FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds
around 5 mph.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Hot. Lows in the mid
70s. Highs in the mid 90s. Heat index values up to 105.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the lower 70s. Heat index values up to
100 early in the evening.
.SUNDAY THROUGH MONDAY NIGHT...Partly cloudy with a slight chance
of showers and thunderstorms. Highs in the lower 90s. Lows around
70. Chance of rain 20 percent. Heat index values up to 100.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

MOZ041-047-048-022200-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds 5 to 10 mph. Heat index values up to 105 this
afternoon.
.TONIGHT...Mostly clear. Lows in the upper 70s. South winds
around 5 mph. Heat index values up to 103 early in the evening.
.THURSDAY...Sunny, hot with highs in the upper 90s. South winds
5 to 10 mph.
.THURSDAY NIGHT...Mostly clear. Lows in the upper 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 106.
.FRIDAY NIGHT AND SATURDAY...Partly cloudy. Hot. Lows in the mid
70s. Highs in the upper 90s. Heat index values up to 105.
.SATURDAY NIGHT...Partly cloudy in the evening, then mostly clear
with a slight chance of showers after midnight. Lows in the mid
70s. Chance of rain 20 percent. Heat index values up to 105 early
in the evening.
.SUNDAY THROUGH MONDAY NIGHT...Partly cloudy with a slight chance
of showers and thunderstorms. Hot. Highs in the mid 90s. Lows in
the lower 70s. Chance of rain 20 percent. Heat index values up to
105.
.TUESDAY...Mostly sunny. Highs in the mid 90s.

$$

ILZ095>097-MOZ018-019-026-027-034>036-022200-
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
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds 5 to 10 mph with gusts up to 20 mph.
.TONIGHT...Mostly clear. Lows in the upper 70s. South winds
around 5 mph. Heat index values up to 101 early in the evening.
.THURSDAY...Sunny, hot with highs in the mid 90s. Southwest winds
5 to 10 mph.
.THURSDAY NIGHT...Mostly clear. Lows in the upper 70s. South
winds around 5 mph. Heat index values up to 101 early in the
evening.
.FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds
around 5 mph. Heat index values up to 102.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 70s. Heat index values up to 100 early in
the evening.
.SATURDAY THROUGH SUNDAY NIGHT...Partly cloudy with a slight
chance of showers and thunderstorms. Highs in the mid 90s. Lows
in the lower 70s. Chance of rain 20 percent. Heat index values up
to 105.
.LABOR DAY AND MONDAY NIGHT...Partly cloudy. A slight chance of
showers and thunderstorms. Highs in the upper 80s. Lows in the
upper 60s. Chance of rain 20 percent.
.TUESDAY...Mostly sunny. Highs in the upper 80s.

$$

ILZ069-070-074-022200-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds around 5 mph. Heat index values up to 106.
.TONIGHT...Mostly clear. Lows in the upper 70s. South winds
around 5 mph. Heat index values up to 104 early in the evening.
.THURSDAY...Sunny, hot with highs in the upper 90s. Southwest
winds around 5 mph. Heat index values up to 106.
.THURSDAY NIGHT...Clear. Lows in the mid 70s. South winds around
5 mph in the evening, becoming light and variable. Heat index
values up to 103 early in the evening.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 105.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index
values up to 100 early in the evening.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. A slight chance of
showers and thunderstorms. Hot. Highs in the upper 90s. Lows in
the lower 70s. Chance of rain 20 percent. Heat index values up to
105.
.SUNDAY...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 100.
.SUNDAY NIGHT...Partly cloudy. Lows around 70.
.LABOR DAY...Sunny. Highs in the lower 90s.
.MONDAY NIGHT...Partly cloudy with a 20 percent chance of
showers. Lows in the upper 60s.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

MOZ074-084-085-099-022200-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the mid 90s. South
winds around 5 mph.
.TONIGHT...Mostly clear. Lows in the lower 70s. South winds
around 5 mph. Heat index values up to 100 early in the evening.
.THURSDAY...Sunny, hot with highs in the mid 90s. South winds
around 5 mph. Heat index values up to 103.
.THURSDAY NIGHT...Mostly clear. Lows in the lower 70s. South
winds around 5 mph in the evening, becoming light and variable.
Heat index values up to 101 early in the evening.
.FRIDAY...Sunny, hot with highs in the mid 90s. Light and
variable winds, becoming south around 5 mph in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. Heat index
values up to 100 early in the evening.
.SATURDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Hot with highs in the mid 90s. Chance of rain
20 percent. Heat index values up to 105.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. A slight chance of
showers and thunderstorms. Lows around 70. Highs in the lower
90s. Chance of rain 20 percent. Heat index values up to 100.
.SUNDAY NIGHT AND LABOR DAY...Mostly clear. Lows in the upper
60s. Highs in the lower 90s.
.MONDAY NIGHT...Partly cloudy. Lows in the upper 60s.
.TUESDAY...Sunny. Highs in the lower 90s.

$$

MOZ051-052-060-022200-
Montgomery MO-Lincoln MO-Warren MO-
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the mid 90s. Southwest
winds around 5 mph. Heat index values up to 104.
.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 103 early in the evening.
.THURSDAY...Sunny, hot with highs in the mid 90s. Southwest winds
around 5 mph. Heat index values up to 104.
.THURSDAY NIGHT...Mostly clear. Lows in the upper 70s. South
winds around 5 mph. Heat index values up to 103 early in the
evening.
.FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds
around 5 mph. Heat index values up to 103.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 70s. Heat index values up to 100 early in
the evening.
.SATURDAY THROUGH SUNDAY...Partly cloudy with a slight chance of
showers and thunderstorms. Highs in the mid 90s. Lows in the
lower 70s. Chance of rain 20 percent. Heat index values up to
105.
.SUNDAY NIGHT...Partly cloudy. Lows in the upper 60s.
.LABOR DAY AND MONDAY NIGHT...Partly cloudy. A slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
upper 60s. Chance of rain 20 percent.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

ILZ058-059-098-099-022200-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds 5 to 10 mph.
.TONIGHT...Mostly clear. Lows in the upper 70s. South winds
around 5 mph. Heat index values up to 102 early in the evening.
.THURSDAY...Sunny, hot with highs in the upper 90s. Southwest
winds 5 to 10 mph.
.THURSDAY NIGHT...Mostly clear. Lows in the upper 70s. South
winds around 5 mph. Heat index values up to 102 early in the
evening.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 70s. Heat index values up to 100 early in
the evening.
.SATURDAY...Mostly sunny with a slight chance of thunderstorms. A
slight chance of showers in the morning, then a chance of showers
in the afternoon. Hot with highs in the mid 90s. Chance of rain
30 percent. Heat index values up to 105.
.SATURDAY NIGHT...Partly cloudy in the evening, then clearing. A
20 percent chance of showers. Lows in the lower 70s. Heat index
values up to 100 early in the evening.
.SUNDAY...Sunny. A slight chance of showers and thunderstorms in
the afternoon. Highs in the lower 90s. Chance of rain 20 percent.
.SUNDAY NIGHT...Partly cloudy. Lows in the upper 60s.
.LABOR DAY AND MONDAY NIGHT...Partly cloudy. A slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
upper 60s. Chance of rain 20 percent.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

ILZ060-064-065-022200-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds 5 to 10 mph. Heat index values up to 105.
.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 103 early in the evening.
.THURSDAY...Sunny, hot with highs in the upper 90s. Southwest
winds 5 to 10 mph. Heat index values up to 103.
.THURSDAY NIGHT...Clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 102 early in the evening.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 104.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index
values up to 100 early in the evening.
.SATURDAY...Sunny with a slight chance of thunderstorms. A slight
chance of showers in the morning, then a chance of showers in the
afternoon. Hot with highs in the mid 90s. Chance of rain
30 percent. Heat index values up to 105.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. A slight chance of thunderstorms in the evening. A
slight chance of showers. Lows in the lower 70s. Chance of rain
20 percent. Heat index values up to 100 early in the evening.
.SUNDAY...Sunny. A slight chance of showers and thunderstorms in
the afternoon. Highs in the lower 90s. Chance of rain 20 percent.
.SUNDAY NIGHT...Partly cloudy. Lows in the upper 60s.
.LABOR DAY...Sunny. A slight chance of showers in the afternoon.
Highs around 90. 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 lower 90s.

$$

ILZ079-MOZ075-022200-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds around 5 mph. Heat index values up to 105.
.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 104 early in the evening.
.THURSDAY...Sunny, hot with highs in the upper 90s. Southwest
winds 5 to 10 mph. Heat index values up to 105.
.THURSDAY NIGHT...Clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 103 early in the evening.
.FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds
around 5 mph. Heat index values up to 105.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index
values up to 100 early in the evening.
.SATURDAY AND SATURDAY NIGHT...Partly cloudy. A slight chance of
showers and thunderstorms. Hot. Highs in the mid 90s. Lows in the
lower 70s. Chance of rain 20 percent. Heat index values up to
110.
.SUNDAY...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 100.
.SUNDAY NIGHT...Partly cloudy in the evening, then clearing. Lows
in the upper 60s.
.LABOR DAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Highs in the lower 90s. Chance of rain
20 percent.
.MONDAY NIGHT...Partly cloudy. A slight chance of showers in the
evening. Lows in the upper 60s. Chance of rain 20 percent.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

MOZ059-062-072-073-022200-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the mid 90s. Southwest
winds around 5 mph. Heat index values up to 104.
.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 101 early in the evening.
.THURSDAY...Sunny, hot with highs in the mid 90s. South winds
around 5 mph. Heat index values up to 104.
.THURSDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph. Heat index values up to 102 early in the evening.
.FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds
around 5 mph. Heat index values up to 104.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 70s. Heat index values up to 100 early in
the evening.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Hot with highs in the mid 90s.
Chance of rain 20 percent. Heat index values up to 105.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. 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.
.SUNDAY NIGHT AND LABOR DAY...Partly cloudy. Lows in the upper
60s. Highs in the lower 90s.
.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...Mostly sunny. Highs in the lower 90s.

$$

ILZ102-MOZ065-022200-
Monroe IL-Jefferson MO-
923 AM CDT Wed Sep 2 2026

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SATURDAY...

.REST OF TODAY...Sunny, hot with highs in the upper 90s.
Southwest winds around 5 mph. Heat index values up to 106.
.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 103 early in the evening.
.THURSDAY...Sunny, hot with highs in the upper 90s. Southwest
winds around 5 mph. Heat index values up to 106.
.THURSDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph. Heat index values up to 103 early in the evening.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 106.
.FRIDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the mid 70s. Heat index values up to
105 early in the evening.
.SATURDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Hot with highs in the upper 90s. Chance of rain
20 percent. Heat index values up to 110.
.SATURDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the lower 70s. Heat index values up to 105 early in the
evening.
.SUNDAY...Sunny. A slight chance of showers and thunderstorms in
the afternoon. Highs in the mid 90s. Chance of rain 20 percent.
Heat index values up to 105.
.SUNDAY NIGHT...Partly cloudy. Lows in the upper 60s.
.LABOR DAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the lower 90s. 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 lower 90s.

$$