797
FPUS53 KLSX 040418
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
1117 PM CDT Thu Sep 3 2026

ILZ100-101-MOZ061-063-064-041200-
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
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 108.
.FRIDAY NIGHT...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 THROUGH TUESDAY...Mostly clear. Hot. Highs in the mid
90s. Lows in the upper 60s. Heat index values up to 100.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the mid
70s. Highs in the upper 90s. Heat index values up to 105.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then mostly
clear with 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 with a slight chance of showers and
thunderstorms. Highs in the mid 90s. Chance of rain 20 percent.

$$

MOZ042-049-050-041200-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph.
.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. 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 THROUGH TUESDAY...Mostly clear. Highs in the mid 90s.
Lows in the upper 60s. Heat index values up to 105.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the mid
70s. Highs in the upper 90s. Heat index values up to 100.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. A slight chance of
showers and thunderstorms. Lows in the lower 70s. Highs in the
lower 90s. Chance of rain 20 percent.

$$

MOZ041-047-048-041200-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph.
.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. 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 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 mid
70s. Highs in the upper 90s. Heat index values up to 105.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. 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.

$$

ILZ095>097-MOZ018-019-026-027-034>036-041200-
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
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Near steady temperature in the upper
70s. South winds around 5 mph.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
5 to 10 mph. Heat index values up to 106.
.FRIDAY NIGHT...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 THROUGH MONDAY NIGHT...Mostly clear. Highs in the lower
90s. Lows in the upper 60s. Heat index values up to 100.
.TUESDAY AND TUESDAY NIGHT...Mostly clear. Hot. Highs in the
upper 90s. Lows in the mid 70s. Heat index values up to 100.
.WEDNESDAY...Mostly sunny. Hot with highs in the upper 90s.
.WEDNESDAY NIGHT...Mostly clear 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.
.THURSDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.

$$

ILZ069-070-074-041200-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Clear. Lows in the mid 70s. South winds around 5 mph
late this evening, becoming light and variable.
.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. 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 THROUGH MONDAY NIGHT...Mostly clear. Highs in the lower
90s. Lows in the upper 60s. Heat index values up to 100.
.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 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 with a slight chance of showers and
thunderstorms. Highs in the mid 90s. Chance of rain 20 percent.

$$

MOZ074-084-085-099-041200-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the lower 70s. South winds
around 5 mph late this evening, becoming light and variable.
.FRIDAY...Sunny. Isolated showers and thunderstorms in the
afternoon. Hot with highs in the mid 90s. Southwest winds around
5 mph. Chance of rain 20 percent. Heat index values up to 105.
.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 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. Heat index values up to
105.
.SUNDAY NIGHT THROUGH WEDNESDAY NIGHT...Mostly clear. Lows in the
upper 60s. Highs in the mid 90s. 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.

$$

MOZ051-052-060-041200-
Montgomery MO-Lincoln MO-Warren MO-
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph.
.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 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 THROUGH TUESDAY...Mostly clear. Highs in the mid 90s.
Lows in the upper 60s. Heat index values up to 105.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the mid
70s. Highs in the upper 90s. 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 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.

$$

ILZ058-059-098-099-041200-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 106.
.FRIDAY NIGHT...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 THROUGH 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 mid 70s. Heat index values up to 105.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. A slight chance of
showers and thunderstorms. Lows in the lower 70s. Highs in the
lower 90s. Chance of rain 20 percent.

$$

ILZ060-064-065-041200-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 106.
.FRIDAY NIGHT...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 THROUGH 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 mid 70s. Heat index values up to 100.
.WEDNESDAY NIGHT...Mostly clear with a slight chance of showers
and thunderstorms. Lows in the lower 70s. Chance of rain
20 percent.
.THURSDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.

$$

ILZ079-MOZ075-041200-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Clear. Lows in the mid 70s. South winds around
5 mph.
.FRIDAY...Sunny. Isolated showers and thunderstorms in the
afternoon. Hot with highs in the upper 90s. Southwest winds
around 5 mph. Chance of rain 20 percent. Heat index values up to
107.
.FRIDAY NIGHT...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 THROUGH TUESDAY...Mostly clear. Highs in the mid 90s.
Lows in the upper 60s. Heat index values up to 105.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the
lower 70s. Highs in the upper 90s. 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 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.

$$

MOZ059-062-072-073-041200-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the lower 70s. South winds
around 5 mph.
.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 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 THROUGH TUESDAY...Mostly clear. Highs in the mid 90s.
Lows in the upper 60s. Heat index values up to 105.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the mid
70s. Highs in the mid 90s. Heat index values up to 105.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then mostly
clear with 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.

$$

ILZ102-MOZ065-041200-
Monroe IL-Jefferson MO-
1117 PM CDT Thu Sep 3 2026

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

.OVERNIGHT...Mostly clear. Lows in the mid 70s. South winds
around 5 mph.
.FRIDAY...Sunny, hot with highs in the upper 90s. Southwest winds
around 5 mph. Heat index values up to 109.
.FRIDAY NIGHT...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 THROUGH TUESDAY...Mostly clear. Hot. Highs in the mid
90s. Lows in the upper 60s. Heat index values up to 105.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Hot. Lows in the mid
70s. Highs in the upper 90s. 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 with a slight chance of showers and
thunderstorms. Highs in the mid 90s. Chance of rain 20 percent.
Heat index values up to 100.

$$