934
FPUS53 KLSX 041953
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
253 PM CDT Fri Sep 4 2026

ILZ100-101-MOZ061-063-064-050300-
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
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the upper 70s. South winds
around 5 mph this evening, becoming light and variable. Heat
index values up to 104 early this evening.
.SATURDAY...Sunny, hot with highs around 100. West winds around
5 mph. Heat index values up to 108.
.SATURDAY NIGHT...Mostly clear. Lows in the mid 70s. Northeast
winds around 5 mph. Heat index values up to 105 early in the
evening.
.SUNDAY...Sunny. Highs in the mid 90s. Northeast winds 5 to
10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 60s. East winds
5 to 10 mph.
.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...Mostly clear with a slight chance of showers
and thunderstorms. Lows in the mid 70s. Chance of rain
20 percent. Heat index values up to 105 early in the evening.
.THURSDAY THROUGH FRIDAY...Partly cloudy with a slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
upper 60s. Chance of rain 20 percent.

$$

MOZ042-049-050-050300-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 102 early this 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 clearing.
Lows in the lower 70s. Northeast winds around 5 mph. Heat index
values up to 101 early in the evening.
.SUNDAY...Mostly sunny. Isolated showers and thunderstorms in the
morning. Highs in the lower 90s. East winds 5 to 10 mph. Chance
of rain 20 percent.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 60s. East winds
around 5 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs around 90. 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...Mostly clear with a slight chance of showers
and thunderstorms in the evening, then partly cloudy with a
chance of showers and thunderstorms after midnight. Lows in the
lower 70s. Chance of rain 40 percent.
.THURSDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs around 90. Chance of rain
20 percent.
.THURSDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight. Lows in the mid 60s. Chance of rain
30 percent.
.FRIDAY...Sunny. A slight chance of showers and thunderstorms in
the morning. Highs in the upper 80s. Chance of rain 20 percent.

$$

MOZ041-047-048-050300-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 103 early this evening.
.SATURDAY...Sunny, hot with highs around 100. West winds around
5 mph, becoming northwest in the afternoon. Heat index values up
to 108.
.SATURDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the mid 70s. Northeast winds around 5 mph.
Heat index values up to 107 early in the evening.
.SUNDAY...Mostly sunny. Isolated showers and thunderstorms in the
morning. Hot with highs in the upper 90s. East winds around
5 mph. Chance of rain 20 percent. Heat index values up to 107.
.SUNDAY NIGHT...Mostly clear. Lows around 70. East winds around
5 mph. Heat index values up to 101 early in the evening.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs in the lower
90s. Lows around 70.
.TUESDAY THROUGH WEDNESDAY...Mostly clear. Hot. Highs around 100.
Lows in the mid 70s. Heat index values up to 105.
.WEDNESDAY NIGHT...Mostly clear. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight. Lows in the lower 70s. Chance of
rain 40 percent. Heat index values up to 100 early in the
evening.
.THURSDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 90s. Chance of
rain 20 percent.
.THURSDAY NIGHT...Partly cloudy with a slight chance of showers
and thunderstorms in the evening, then mostly clear with a chance
of showers and thunderstorms after midnight. Lows in the upper
60s. Chance of rain 30 percent.
.FRIDAY...Sunny. A slight chance of showers and thunderstorms in
the morning. Highs in the lower 90s. Chance of rain 20 percent.

$$

ILZ095>097-MOZ018-019-026-027-034>036-050300-
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
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. Southwest winds
around 5 mph this evening, becoming light and variable. Heat
index values up to 102 early this evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. Northwest
winds around 5 mph. Heat index values up to 106.
.SATURDAY NIGHT...Mostly clear in the evening, then becoming
partly cloudy. Lows in the lower 70s. Northeast winds around
5 mph. Heat index values up to 104 early in the evening.
.SUNDAY...Mostly sunny with isolated showers and thunderstorms.
Highs in the lower 90s. East winds 5 to 10 mph. Chance of rain
20 percent.
.SUNDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the upper 60s. East winds 5 to 10 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs in the upper
80s. Lows in the upper 60s.
.TUESDAY AND TUESDAY NIGHT...Mostly clear. Hot. Highs in the mid
90s. Lows in the mid 70s. Heat index values up to 100.
.WEDNESDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Hot with highs in the mid 90s. Chance of rain
20 percent.
.WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight. Lows in the lower 70s. Chance of
rain 40 percent.
.THURSDAY THROUGH FRIDAY...Partly cloudy with a slight chance of
showers and thunderstorms. Highs in the upper 80s. Lows in the
mid 60s. Chance of rain 20 percent.

$$

ILZ069-070-074-050300-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. Southwest winds
around 5 mph this evening, becoming light and variable. Heat
index values up to 104 early this evening.
.SATURDAY...Sunny. Isolated showers and thunderstorms in the
afternoon. Hot with highs around 100. West winds around 5 mph.
Chance of rain 20 percent. Heat index values up to 109.
.SATURDAY NIGHT...Mostly clear. Lows in the lower 70s. Northeast
winds around 5 mph. Heat index values up to 105 early in the
evening.
.SUNDAY...Sunny. Highs in the lower 90s. Northeast winds 5 to
10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 60s. Northeast
winds 5 to 10 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs in the lower
90s. Lows in the mid 60s.
.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. A slight chance of showers and
thunderstorms after midnight. Lows in the mid 70s. Chance of rain
20 percent. Heat index values up to 100 early in the evening.
.THURSDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 90s. Chance of
rain 20 percent.
.THURSDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the mid 60s.
.FRIDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 90s. Chance of
rain 20 percent.

$$

MOZ074-084-085-099-050300-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. Light and variable
winds. Heat index values up to 100 early this evening.
.SATURDAY...Sunny. Isolated showers and thunderstorms in the
afternoon. Hot with highs in the upper 90s. Northwest winds
around 5 mph in the morning, becoming light and variable. Chance
of rain 20 percent. Heat index values up to 107.
.SATURDAY NIGHT...Mostly clear. Isolated showers and
thunderstorms in the evening. Lows in the lower 70s. Light and
variable winds. Chance of rain 20 percent. Heat index values up
to 102 early in the evening.
.SUNDAY...Sunny. Isolated showers and thunderstorms in the
morning. Highs in the mid 90s. Northeast winds around 5 mph.
Chance of rain 20 percent. Heat index values up to 103.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 60s. Northeast
winds around 5 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs in the lower
90s. Lows in the mid 60s.
.TUESDAY AND TUESDAY NIGHT...Clear, hot. Highs in the mid 90s.
Lows around 70.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Hot. Highs in the
upper 90s. Lows in the lower 70s. Heat index values up to 105.
.THURSDAY THROUGH FRIDAY...Mostly clear with a slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
mid 60s. Chance of rain 20 percent.

$$

MOZ051-052-060-050300-
Montgomery MO-Lincoln MO-Warren MO-
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. Light and variable
winds. Heat index values up to 103 early this evening.
.SATURDAY...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. Lows in the lower 70s. Northeast winds around
5 mph. Heat index values up to 104 early in the evening.
.SUNDAY...Mostly sunny. Isolated showers and thunderstorms in the
morning. Highs in the lower 90s. East winds around 5 mph. Chance
of rain 20 percent. Heat index values up to 100.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 60s. East winds
around 5 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows
in the mid 60s.
.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 with a slight chance of showers
and thunderstorms 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
100 early in the evening.
.THURSDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 90s. Chance of
rain 20 percent.
.THURSDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms after midnight. Lows in the mid 60s. Chance of rain
30 percent.
.FRIDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the upper 80s. Chance of
rain 20 percent.

$$

ILZ058-059-098-099-050300-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph this evening, becoming light and variable. Heat index
values up to 103 early this evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. Northwest
winds around 5 mph. Heat index values up to 106.
.SATURDAY NIGHT...Mostly clear. Lows around 70. Northeast winds
around 5 mph. Heat index values up to 103 early in the evening.
.SUNDAY...Mostly sunny. Highs in the lower 90s. Northeast winds
5 to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 60s. East winds
5 to 10 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows
in the mid 60s.
.TUESDAY AND TUESDAY NIGHT...Mostly clear. Hot. Highs in the mid
90s. Lows in the lower 70s.
.WEDNESDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Hot with highs in the upper 90s. Chance of rain
20 percent.
.WEDNESDAY NIGHT...Mostly clear with a slight chance of showers
and thunderstorms 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
100 early in the evening.
.THURSDAY THROUGH FRIDAY...Partly cloudy with a slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
mid 60s. Chance of rain 20 percent.

$$

ILZ060-064-065-050300-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear this evening, then becoming partly
cloudy. Lows in the mid 70s. Southwest winds around 5 mph this
evening, becoming light and variable. Heat index values up to
101 early this evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. Northwest
winds around 5 mph. Heat index values up to 106.
.SATURDAY NIGHT...Mostly clear. Lows around 70. Northeast winds
around 5 mph. Heat index values up to 103 early in the evening.
.SUNDAY...Mostly sunny. Highs in the lower 90s. Northeast winds
5 to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the lower 60s. East winds
5 to 10 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows
in the mid 60s.
.TUESDAY AND TUESDAY NIGHT...Mostly clear. Hot. Highs in the mid
90s. Lows in the lower 70s.
.WEDNESDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Hot with highs in the upper 90s. Chance of rain
20 percent.
.WEDNESDAY NIGHT...Mostly clear with a slight chance of showers
and thunderstorms 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
100 early in the evening.
.THURSDAY THROUGH FRIDAY...Partly cloudy with a slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
mid 60s. Chance of rain 20 percent.

$$

ILZ079-MOZ075-050300-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 104 early this evening.
.SATURDAY...Sunny. Isolated showers and thunderstorms in the
afternoon. Hot with highs in the upper 90s. West winds around
5 mph. Chance of rain 20 percent. Heat index values up to 109.
.SATURDAY NIGHT...Mostly clear. Isolated showers and
thunderstorms in the evening. Lows in the lower 70s. Northwest
winds around 5 mph, becoming northeast after midnight. Chance of
rain 20 percent. Heat index values up to 105 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...Mostly clear. Lows in the mid 60s. Northeast
winds around 5 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows
in the mid 60s.
.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. 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.
.THURSDAY THROUGH FRIDAY...Partly cloudy. A slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
upper 60s. Chance of rain 20 percent.

$$

MOZ059-062-072-073-050300-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. Light and variable
winds. Heat index values up to 102 early this evening.
.SATURDAY...Sunny, hot with highs in the upper 90s. West winds
around 5 mph, becoming northwest in the afternoon. Heat index
values up to 106.
.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. Isolated showers and thunderstorms in the
morning. Highs in the lower 90s. Northeast winds around 5 mph.
Chance of rain 20 percent. Heat index values up to 101.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 60s. East winds
around 5 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs around 90. Lows
in the mid 60s.
.TUESDAY...Sunny, hot with highs in the mid 90s.
.TUESDAY NIGHT...Clear. Lows in the lower 70s.
.WEDNESDAY...Sunny, hot with highs in the upper 90s.
.WEDNESDAY NIGHT...Mostly clear. A slight chance of showers and
thunderstorms after midnight. Lows in the lower 70s. Chance of
rain 20 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.
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly clear
with a chance of showers and thunderstorms after midnight. Lows
in the mid 60s. Chance of rain 30 percent.
.FRIDAY...Sunny. A slight chance of showers and thunderstorms in
the morning. Highs in the upper 80s. Chance of rain 20 percent.

$$

ILZ102-MOZ065-050300-
Monroe IL-Jefferson MO-
253 PM CDT Fri Sep 4 2026

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

.TONIGHT...Mostly clear. Lows in the mid 70s. Light and variable
winds, becoming southwest around 5 mph after midnight. Heat index
values up to 103 early this evening.
.SATURDAY...Sunny. Isolated showers and thunderstorms in the
afternoon. Hot with highs in the upper 90s. West winds around
5 mph. Chance of rain 20 percent. Heat index values up to 108.
.SATURDAY NIGHT...Mostly clear. Lows in the lower 70s. Northwest
winds around 5 mph, becoming northeast after midnight. Heat index
values up to 105 early in the evening.
.SUNDAY...Sunny. Highs in the mid 90s. Northeast winds around
5 mph. Heat index values up to 101.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 60s. East winds
around 5 mph.
.LABOR DAY AND MONDAY NIGHT...Mostly clear. Highs in the lower
90s. Lows in the mid 60s.
.TUESDAY THROUGH WEDNESDAY...Mostly clear. Hot. Highs in the
upper 90s. Lows in the lower 70s. Heat index values up to 110.
.WEDNESDAY NIGHT...Mostly clear. 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.
.THURSDAY THROUGH FRIDAY...Partly cloudy with a slight chance of
showers and thunderstorms. Highs in the lower 90s. Lows in the
mid 60s. Chance of rain 20 percent.

$$