654
FPUS53 KLSX 030933
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
433 AM CDT Thu Sep 3 2026

ILZ100-101-MOZ061-063-064-031700-
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
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.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.
.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 upper 70s. South winds
around 5 mph in the evening, becoming light and variable. Heat
index values up to 105 early in the evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. West winds
around 5 mph. Heat index values up to 108.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the mid 70s.
Highs in the mid 90s. Heat index values up to 105.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Hot. Lows around
70. Highs in the mid 90s. Heat index values up to 100.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the mid
70s. Highs in the mid 90s. Heat index values up to 100.

$$

MOZ042-049-050-031700-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.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.
.FRIDAY...Sunny, hot with highs in the mid 90s. Southwest winds
around 5 mph.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph. Heat index values up to 103 early in the evening.
.SATURDAY...Sunny, hot with highs in the mid 90s. West winds
around 5 mph. Heat index values up to 105.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 70s.
Highs in the lower 90s. Heat index values up to 105.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the upper
60s. Highs in the mid 90s. Heat index values up to 100.
.TUESDAY NIGHT...Mostly clear. Lows in the mid 70s.
.WEDNESDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Highs in the mid 90s. Chance of rain
20 percent.

$$

MOZ041-047-048-031700-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.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 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 in the evening, becoming light and variable. Heat
index values up to 105 early in the evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. West winds
around 5 mph. Heat index values up to 108 in the afternoon.
.SATURDAY NIGHT THROUGH TUESDAY NIGHT...Mostly clear. Hot. Lows
in the mid 70s. Highs in the mid 90s. Heat index values up to
105.
.WEDNESDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Hot with highs in the mid 90s. Chance of rain
20 percent.

$$

ILZ095>097-MOZ018-019-026-027-034>036-031700-
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
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.TODAY...Sunny, hot with highs in the mid 90s. Southwest winds
5 to 10 mph with gusts up to 20 mph. Heat index values up to 104.
.TONIGHT...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 mid 90s. Southwest winds
5 to 10 mph. Heat index values up to 104.
.FRIDAY NIGHT...Mostly 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.
.SATURDAY...Sunny, hot with highs in the mid 90s. West winds
around 5 mph. Heat index values up to 105.
.SATURDAY NIGHT...Mostly clear. Lows in the lower 70s. Heat index
values up to 100 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 100.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows around 70.
Highs in the lower 90s.
.TUESDAY NIGHT...Mostly clear. Lows in the mid 70s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the lower 90s. Chance of
rain 20 percent.

$$

ILZ069-070-074-031700-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.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.
.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. Light and
variable winds. Heat index values up to 104 early in the evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. Light and
variable winds, becoming northwest around 5 mph in the afternoon.
Heat index values up to 107.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 70s.
Highs in the lower 90s. Heat index values up to 100.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the upper
60s. Highs in the mid 90s. Heat index values up to 100.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the mid
70s. Highs in the mid 90s. Heat index values up to 100.

$$

MOZ074-084-085-099-031700-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.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 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. Southwest winds
around 5 mph. Heat index values up to 106.
.FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. Light and
variable winds. Heat index values up to 102 early in the evening.
.SATURDAY...Sunny, hot with highs in the mid 90s. Light and
variable winds. Heat index values up to 107.
.SATURDAY NIGHT THROUGH WEDNESDAY...Mostly clear. Lows in the
upper 60s. Highs in the lower 90s. Heat index values up to 105.

$$

MOZ051-052-060-031700-
Montgomery MO-Lincoln MO-Warren MO-
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.TODAY...Sunny, hot with highs in the mid 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.
.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. Light and
variable winds. Heat index values up to 104 early in the evening.
.SATURDAY...Mostly sunny. Hot with highs in the mid 90s. Light
and variable winds, becoming west around 5 mph in the afternoon.
Heat index values up to 107.
.SATURDAY NIGHT THROUGH TUESDAY NIGHT...Mostly clear. Lows in the
lower 70s. Highs in the lower 90s. Heat index values up to 105.
.WEDNESDAY...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.

$$

ILZ058-059-098-099-031700-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.TODAY...Sunny, hot with highs in the upper 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 102 early in the evening.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 70s. Southwest
winds around 5 mph in the evening, becoming light and variable.
Heat index values up to 103 early in the evening.
.SATURDAY...Sunny, hot with highs in the mid 90s. West winds
around 5 mph. Heat index values up to 104.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 70s.
Highs in the lower 90s. Heat index values up to 100.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the upper
60s. Highs in the lower 90s.
.TUESDAY NIGHT...Mostly clear. Lows in the lower 70s.
.WEDNESDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Hot with highs in the mid 90s. Chance of rain
20 percent.

$$

ILZ060-064-065-031700-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.TODAY...Sunny, hot with highs in the upper 90s. Southwest winds
5 to 10 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 102 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. Southwest
winds around 5 mph in the evening, becoming light and variable.
Heat index values up to 103 early in the evening.
.SATURDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Hot with highs in the mid 90s. West winds
around 5 mph. Chance of rain 20 percent. Heat index values up to
105.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 70s.
Highs in the lower 90s. Heat index values up to 100.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the mid
60s. Highs in the lower 90s.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the
lower 70s. Highs in the mid 90s. Heat index values up to 100.

$$

ILZ079-MOZ075-031700-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.TODAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 105.
.TONIGHT...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 106.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph in the evening, becoming light and variable. Heat
index values up to 104 early in the evening.
.SATURDAY...Mostly sunny. Hot with highs in the mid 90s. West
winds around 5 mph. Heat index values up to 109.
.SATURDAY NIGHT THROUGH WEDNESDAY...Mostly clear. Lows around 70.
Highs in the mid 90s. Heat index values up to 105.

$$

MOZ059-062-072-073-031700-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.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 102 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. Light and
variable winds. Heat index values up to 103 early in the evening.
.SATURDAY...Sunny, hot with highs in the mid 90s. West winds
around 5 mph in the morning, becoming light and variable. Heat
index values up to 108.
.SATURDAY NIGHT THROUGH WEDNESDAY...Mostly clear. Lows around 70.
Highs in the lower 90s. Heat index values up to 105.

$$

ILZ102-MOZ065-031700-
Monroe IL-Jefferson MO-
433 AM CDT Thu Sep 3 2026

...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT SATURDAY...

.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 104 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 in the evening, becoming light and variable. Heat
index values up to 105 early in the evening.
.SATURDAY...Mostly sunny. Hot with highs in the upper 90s. West
winds around 5 mph. Heat index values up to 111.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Hot. Lows in the lower
70s. Highs in the mid 90s. Heat index values up to 105.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the upper
60s. Highs in the mid 90s. Heat index values up to 100.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the
lower 70s. Highs in the mid 90s. Heat index values up to 105.

$$