925
FPUS53 KLSX 040933
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
433 AM CDT Fri Sep 4 2026

ILZ100-101-MOZ061-063-064-041700-
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 Fri Sep 4 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 108.
.TONIGHT...Mostly clear in the evening, then becoming partly
cloudy. 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 108.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Humid with lows in the lower 70s. Northeast winds
around 5 mph. Heat index values up to 104 early in the evening.
.SUNDAY...Sunny. Highs in the mid 90s. Northeast winds 5 to
10 mph. Heat index values up to 102.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows in the
upper 60s. Highs in the lower 90s.
.TUESDAY THROUGH WEDNESDAY...Mostly clear. Hot. Highs in the
upper 90s. Lows in the mid 70s. Heat index values up to 105.
.WEDNESDAY NIGHT...Mostly clear. A slight chance of showers after
midnight. Lows in the mid 70s. Chance of rain 20 percent. Heat
index values up to 100 early in the evening.
.THURSDAY...Sunny with a slight chance of showers and
thunderstorms. Hot with highs in the mid 90s. Chance of rain
20 percent.

$$

MOZ042-049-050-041700-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
433 AM CDT Fri Sep 4 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 103 early in the evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. West winds
around 5 mph. Heat index values up to 106.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the lower 70s. Northeast winds around 5 mph
in the evening, becoming light and variable. Heat index values up
to 102 early in the evening.
.SUNDAY...Sunny. Highs in the mid 90s. East winds around 5 mph.
Heat index values up to 103.
.SUNDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the upper 60s.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs in the lower
90s. Lows in the upper 60s.
.TUESDAY THROUGH WEDNESDAY...Mostly clear. Hot. Highs in the
upper 90s. Lows in the mid 70s. Heat index values up to 105.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. A slight chance of
showers and thunderstorms. Lows in the mid 70s. Highs in the
lower 90s. Chance of rain 20 percent.

$$

MOZ041-047-048-041700-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
433 AM CDT Fri Sep 4 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.
.SATURDAY...Sunny, hot with highs around 100. West winds around
5 mph. Heat index values up to 107.
.SATURDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the mid 70s. Northeast winds around 5 mph in the evening,
becoming light and variable. Heat index values up to 104 early in
the evening.
.SUNDAY...Sunny, hot with highs in the upper 90s. East winds
around 5 mph. Heat index values up to 106.
.SUNDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows around 70. Heat index values up to 100 early
in the evening.
.LABOR DAY THROUGH TUESDAY...Mostly clear. Hot. Highs in the
upper 90s. Lows in the lower 70s. Heat index values up to 105.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the
upper 70s. Highs around 100. Heat index values up to 105.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. A slight chance of
showers and thunderstorms. Lows in the mid 70s. Highs in the mid
90s. Chance of rain 20 percent. Heat index values up to 100.

$$

ILZ095>097-MOZ018-019-026-027-034>036-041700-
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 Fri Sep 4 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 in the evening, then becoming partly
cloudy. Lows in the mid 70s. Southwest winds around 5 mph in the
evening, becoming light and variable. Heat index values up to
104 early in the evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. West winds
around 5 mph, becoming northwest around 5 mph in the afternoon.
Heat index values up to 105.
.SATURDAY NIGHT...Mostly clear. Lows in the lower 70s. Northeast
winds around 5 mph. Heat index values up to 103 early in the
evening.
.SUNDAY...Sunny. Highs in the lower 90s. East winds 5 to 10 mph.
Heat index values up to 100.
.SUNDAY NIGHT...Partly cloudy. Lows in the upper 60s.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows
around 70.
.TUESDAY...Mostly sunny. Hot with highs in the mid 90s.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 70s.
.WEDNESDAY...Sunny. A slight chance of showers and thunderstorms
in the morning. Hot with highs in the mid 90s. Chance of rain
20 percent.
.WEDNESDAY NIGHT...Partly cloudy with a slight chance of
thunderstorms. A slight chance of showers in the evening, then a
chance of showers after midnight. Lows in the mid 70s. Chance of
rain 30 percent. Heat index values up to 100 early in the
evening.
.THURSDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.

$$

ILZ069-070-074-041700-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
433 AM CDT Fri Sep 4 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 108.
.TONIGHT...Mostly clear. Lows in the mid 70s. Southwest winds
around 5 mph in the evening, becoming light and variable. Heat
index values up to 105 early in the evening.
.SATURDAY...Mostly sunny. Isolated showers and thunderstorms in
the afternoon. Hot with highs in the upper 90s. Northwest winds
around 5 mph. Chance of rain 20 percent. Heat index values up to
108.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Humid with lows in the lower 70s. Northeast winds
around 5 mph. Heat index values up to 104 early in the evening.
.SUNDAY...Sunny. Highs in the lower 90s. Northeast winds 5 to
10 mph. Heat index values up to 100.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows in the
upper 60s. Highs in the lower 90s.
.TUESDAY THROUGH WEDNESDAY NIGHT...Mostly clear. Hot. Highs in
the upper 90s. Lows in the mid 70s. Heat index values up to 105.
.THURSDAY...Sunny with a slight chance of showers. A slight
chance of thunderstorms in the afternoon. Hot with highs in the
mid 90s. Chance of rain 20 percent.

$$

MOZ074-084-085-099-041700-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
433 AM CDT Fri Sep 4 2026

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

.TODAY...Sunny. Isolated showers and thunderstorms this
afternoon. 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. 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 upper 90s. Northwest
winds around 5 mph. Heat index values up to 104.
.SATURDAY NIGHT...Mostly clear. Lows in the lower 70s. Light and
variable winds. Heat index values up to 101 early in the evening.
.SUNDAY...Sunny. Highs in the mid 90s. Northeast winds around
5 mph. Heat index values up to 104.
.SUNDAY NIGHT THROUGH WEDNESDAY...Mostly clear. Lows in the upper
60s. Highs in the mid 90s. Heat index values up to 105.
.WEDNESDAY NIGHT...Mostly clear. Lows in the lower 70s.
.THURSDAY...Sunny with a slight chance of showers. A slight
chance of thunderstorms in the afternoon. Highs in the lower 90s.
Chance of rain 20 percent.

$$

MOZ051-052-060-041700-
Montgomery MO-Lincoln MO-Warren MO-
433 AM CDT Fri Sep 4 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 lower 70s. Light and
variable winds. Heat index values up to 104 early in the evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. West winds
around 5 mph. Heat index values up to 106.
.SATURDAY NIGHT...Mostly clear. Humid with lows in the lower 70s.
Light and variable winds. Heat index values up to 103 early in
the evening.
.SUNDAY...Sunny. Highs in the lower 90s. East winds around 5 mph.
Heat index values up to 103.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows in the
upper 60s. Highs in the lower 90s.
.TUESDAY THROUGH WEDNESDAY...Mostly clear. Hot. Highs in the
upper 90s. Lows in the mid 70s. Heat index values up to 105.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. A slight chance of
showers and thunderstorms. Lows in the mid 70s. Highs in the
lower 90s. Chance of rain 20 percent. Heat index values up to
100.

$$

ILZ058-059-098-099-041700-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
433 AM CDT Fri Sep 4 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 in the evening, then becoming partly
cloudy. Lows in the lower 70s. Southwest 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 upper 90s. West
winds around 5 mph, becoming northwest around 5 mph in the
afternoon. Heat index values up to 106.
.SATURDAY NIGHT...Mostly clear. Lows around 70. Northeast winds
around 5 mph. Heat index values up to 102 early in the evening.
.SUNDAY...Sunny. Highs in the lower 90s. Northeast winds 5 to
10 mph.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows in the
mid 60s. Highs around 90.
.TUESDAY THROUGH WEDNESDAY...Mostly clear. Hot. Highs in the
upper 90s. Lows in the mid 70s. Heat index values up to 105.
.WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms after midnight. Lows in the lower 70s. Chance of
rain 20 percent.
.THURSDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.

$$

ILZ060-064-065-041700-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
433 AM CDT Fri Sep 4 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 in the evening, then becoming partly
cloudy. Lows in the lower 70s. Southwest winds around 5 mph in
the evening, becoming light and variable. Heat index values up to
103 early in the evening.
.SATURDAY...Mostly sunny. Isolated showers and thunderstorms in
the afternoon. Hot with highs in the upper 90s. Northwest winds
around 5 mph. Chance of rain 20 percent. Heat index values up to
105.
.SATURDAY NIGHT...Mostly clear. Isolated showers and
thunderstorms in the evening. Lows around 70. Northeast winds
around 5 mph. Chance of rain 20 percent. Heat index values up to
101 early in the evening.
.SUNDAY...Sunny. Highs around 90. Northeast winds 5 to 10 mph.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows in the
mid 60s. Highs in the upper 80s.
.TUESDAY THROUGH WEDNESDAY...Mostly clear. Hot. Highs in the
upper 90s. Lows in the lower 70s. Heat index values up to 105.
.WEDNESDAY NIGHT...Mostly clear in the evening, then partly
cloudy with a slight chance of showers after midnight. Lows in
the mid 70s. Chance of rain 20 percent.
.THURSDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.

$$

ILZ079-MOZ075-041700-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
433 AM CDT Fri Sep 4 2026

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

.TODAY...Sunny. Isolated showers and thunderstorms this
afternoon. Hot with highs in the upper 90s. Southwest winds
around 5 mph. Chance of rain 20 percent. Heat index values up to
107.
.TONIGHT...Mostly clear. Lows in the lower 70s. Southwest winds
around 5 mph. Heat index values up to 105 early in the evening.
.SATURDAY...Mostly sunny. Hot with highs in the upper 90s.
Northwest winds around 5 mph. Heat index values up to 106.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the lower 70s. North winds around 5 mph.
Heat index values up to 102 early in the evening.
.SUNDAY...Sunny with highs in the lower 90s. Northeast winds 5 to
10 mph. Heat index values up to 104.
.SUNDAY NIGHT THROUGH TUESDAY...Mostly clear. Lows in the upper
60s. Highs in the lower 90s. Heat index values up to 100.
.TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...Mostly clear. Hot. Lows
in the mid 70s. Highs in the upper 90s. Heat index values up to
105.
.THURSDAY...Sunny. A slight chance of showers in the morning.
Highs in the mid 90s. Chance of rain 20 percent.

$$

MOZ059-062-072-073-041700-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
433 AM CDT Fri Sep 4 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 107.
.TONIGHT...Mostly clear. Lows in the lower 70s. Light and
variable winds. Heat index values up to 103 early in the evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. West winds
around 5 mph. Heat index values up to 107.
.SATURDAY NIGHT...Mostly clear. Lows in the lower 70s. Light and
variable winds. Heat index values up to 102 early in the evening.
.SUNDAY...Sunny with highs in the mid 90s. Northeast winds around
5 mph. Heat index values up to 104.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows in the
upper 60s. Highs in the lower 90s.
.TUESDAY THROUGH WEDNESDAY NIGHT...Mostly clear. Hot. Highs in
the upper 90s. Lows in the mid 70s. Heat index values up to 105.
.THURSDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.

$$

ILZ102-MOZ065-041700-
Monroe IL-Jefferson MO-
433 AM CDT Fri Sep 4 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 109.
.TONIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 70s. Southwest winds around 5 mph. 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 107.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the lower 70s. Northwest winds around 5 mph
in the evening, becoming light and variable. Heat index values up
to 104 early in the evening.
.SUNDAY...Sunny with highs in the mid 90s. Northeast winds around
5 mph. Heat index values up to 106.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Lows in the
mid 60s. Highs in the lower 90s.
.TUESDAY THROUGH WEDNESDAY NIGHT...Mostly clear. Hot. Highs in
the upper 90s. Lows in the mid 70s. Heat index values up to 110.
.THURSDAY...Sunny. A slight chance of showers in the morning. Hot
with highs in the mid 90s. Chance of rain 20 percent. Heat index
values up to 100.

$$