197
FPUS53 KLSX 180919
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
419 AM CDT Mon Aug 18 2025

ILZ100-101-MOZ061-063-064-181700-
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
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Mostly sunny. A slight chance of showers and
thunderstorms this afternoon. Hot with highs in the mid 90s.
South winds around 5 mph. Chance of rain 20 percent. Heat index
values up to 109.
.TONIGHT...Partly cloudy. A slight chance of showers and
thunderstorms after midnight. Humid with lows in the mid 70s.
South winds around 5 mph. Chance of rain 20 percent. Heat index
values up to 105 early in the evening.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs in the lower 90s. Southwest winds
around 5 mph, becoming northwest around 5 mph in the afternoon.
Chance of rain 40 percent. Heat index values up to 106.
.TUESDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms in the evening, then a chance of showers with a
slight chance of thunderstorms after midnight. Humid with lows in
the lower 70s. North winds around 5 mph. Chance of rain
40 percent. Heat index values up to 102 early in the evening.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon. Humid with highs in the upper
80s. North winds 5 to 10 mph. Chance of rain 30 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 60s.
.THURSDAY THROUGH SUNDAY...Mostly clear. Highs in the mid 80s.
Lows in the mid 60s.

$$

MOZ042-049-050-181700-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Mostly sunny. A chance of thunderstorms with a slight
chance of showers this afternoon. Hot with highs in the mid 90s.
South winds around 5 mph. Chance of rain 30 percent. Heat index
values up to 106.
.TONIGHT...Partly cloudy with a slight chance of showers and
thunderstorms. Lows in the lower 70s. South winds around 5 mph.
Chance of rain 20 percent.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs in the lower 90s. West winds
around 5 mph. Chance of rain 50 percent. Heat index values up to
100.
.TUESDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms. Humid with lows in the lower 70s. North winds
around 5 mph. Chance of rain 50 percent.
.WEDNESDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the mid 80s. Northeast winds 5 to 10 mph.
Chance of rain 20 percent.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows in the mid
60s. Highs in the lower 80s.
.THURSDAY NIGHT...Clear. Lows in the lower 60s.
.FRIDAY THROUGH SATURDAY NIGHT...Mostly clear. Highs in the mid
80s. Lows in the lower 60s.
.SUNDAY...Sunny. Highs in the upper 70s.

$$

MOZ041-047-048-181700-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Mostly sunny. A chance of showers and thunderstorms this
afternoon. Hot with highs in the mid 90s. South winds around
5 mph. Chance of rain 30 percent. Heat index values up to 107.
.TONIGHT...Partly cloudy with a slight chance of showers and
thunderstorms. Lows in the lower 70s. South winds around 5 mph.
Chance of rain 20 percent.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs in the lower 90s. West winds
around 5 mph. Chance of rain 50 percent. Heat index values up to
103.
.TUESDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms. Humid with lows in the lower 70s. North winds
around 5 mph. Chance of rain 50 percent. Heat index values up to
101 early in the evening.
.WEDNESDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the upper 80s. Northeast winds 5 to
10 mph. Chance of rain 20 percent.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows in the mid
60s. Highs in the mid 80s.
.THURSDAY NIGHT...Clear. Lows in the lower 60s.
.FRIDAY THROUGH SATURDAY...Mostly clear. Highs in the upper 80s.
Lows in the mid 60s.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows around 60. Highs
in the lower 80s.

$$

ILZ095>097-MOZ018-019-026-027-034>036-181700-
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
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Sunny. A slight chance of showers and thunderstorms this
afternoon. Highs in the mid 90s. South winds 5 to 10 mph. Chance
of rain 20 percent. Heat index values up to 107.
.TONIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight. Humid with lows in the lower 70s.
South winds around 5 mph. Chance of rain 40 percent. Heat index
values up to 106 early in the evening.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs in the upper 80s. Northwest winds
around 5 mph. Chance of rain 40 percent. Heat index values up to
102 in the afternoon.
.TUESDAY NIGHT...Partly cloudy with a slight chance of showers
and thunderstorms. Humid with lows around 70. North winds around
5 mph. Chance of rain 20 percent.
.WEDNESDAY...Mostly sunny with a 20 percent chance of showers.
Highs in the mid 80s. Northeast winds 5 to 10 mph.
.WEDNESDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid
60s. Highs in the mid 80s.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 50s.
Highs in the upper 70s.

$$

ILZ069-070-074-181700-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Sunny. Highs in the lower 90s. Southeast winds around
5 mph. Heat index values up to 106.
.TONIGHT...Mostly clear. Humid with lows in the lower 70s.
Southeast winds around 5 mph. Heat index values up to 103 early
in the evening.
.TUESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon. Humid with highs in the lower
90s. Southwest winds around 5 mph, becoming northwest around
5 mph in the afternoon. Chance of rain 40 percent. Heat index
values up to 106.
.TUESDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms in the evening, then a chance of showers with a
slight chance of thunderstorms after midnight. Humid with lows in
the lower 70s. North winds around 5 mph. Chance of rain
40 percent. Heat index values up to 102 early in the evening.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon. Humid with highs in the upper
80s. North winds 5 to 10 mph. Chance of rain 30 percent.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid
60s. Highs in the mid 80s.
.THURSDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows in
the mid 60s. Highs in the upper 80s.
.SUNDAY...Sunny. Highs in the lower 80s.

$$

MOZ074-084-085-099-181700-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Mostly sunny. A slight chance of showers and
thunderstorms this afternoon. Hot with highs in the mid 90s.
Southeast winds around 5 mph. Chance of rain 20 percent. Heat
index values up to 105.
.TONIGHT...Partly cloudy with a slight chance of showers and
thunderstorms in the evening, then mostly clear after midnight.
Lows in the lower 70s. Southeast winds around 5 mph. Chance of
rain 20 percent. Heat index values up to 100 early in the
evening.
.TUESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon. Hot with highs in the mid 90s.
Southwest winds around 5 mph, becoming northwest in the
afternoon. Chance of rain 50 percent. Heat index values up to
104.
.TUESDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms. Humid with lows around 70. North winds around
5 mph. Chance of rain 50 percent.
.WEDNESDAY...Partly sunny with a chance of showers and
thunderstorms. Highs in the upper 80s. North winds around 5 mph.
Chance of rain 50 percent.
.WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening. Lows in the mid 60s. Chance of rain
20 percent.
.THURSDAY THROUGH SATURDAY NIGHT...Mostly clear. Highs in the
upper 80s. Lows in the lower 60s.
.SUNDAY...Sunny. Highs in the lower 80s.

$$

MOZ051-052-060-181700-
Montgomery MO-Lincoln MO-Warren MO-
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Mostly sunny. A slight chance of showers and
thunderstorms this afternoon. Hot with highs in the mid 90s.
South winds around 5 mph. Chance of rain 20 percent. Heat index
values up to 109.
.TONIGHT...Mostly cloudy in the evening, then partly cloudy with
a slight chance of showers and thunderstorms after midnight.
Humid with lows in the lower 70s. South winds around 5 mph.
Chance of rain 20 percent. Heat index values up to 101 early in
the evening.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs in the lower 90s. West winds
around 5 mph. Chance of rain 50 percent. Heat index values up to
104.
.TUESDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms, mainly in the evening. Humid with lows in the
lower 70s. North winds around 5 mph. Chance of rain 50 percent.
.WEDNESDAY...Mostly sunny with a slight chance of showers. A
slight chance of thunderstorms in the afternoon. Humid with highs
in the mid 80s. Northeast winds 5 to 10 mph. Chance of rain
20 percent.
.WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows in the mid
60s. Highs in the lower 80s.
.THURSDAY NIGHT...Clear. Lows in the lower 60s.
.FRIDAY AND FRIDAY NIGHT...Mostly clear. Highs in the mid 80s.
Lows in the mid 60s.
.SATURDAY...Mostly sunny. Highs in the mid 80s.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows around 60. Highs
in the upper 70s.

$$

ILZ058-059-098-099-181700-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Sunny. Highs in the lower 90s. South winds 5 to 10 mph.
Heat index values up to 105.
.TONIGHT...Partly cloudy. A slight chance of showers and
thunderstorms after midnight. Humid with lows in the lower 70s.
South winds around 5 mph. Chance of rain 20 percent. Heat index
values up to 103 early in the evening.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs around 90. West winds around
5 mph. Chance of rain 40 percent. Heat index values up to 100.
.TUESDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms, mainly in the evening. Humid with lows in the
lower 70s. North winds around 5 mph. Chance of rain 40 percent.
.WEDNESDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the mid 80s. Northeast winds 5 to 10 mph.
Chance of rain 20 percent.
.WEDNESDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows in
the lower 60s. Highs in the mid 80s.
.SUNDAY...Sunny. Highs in the upper 70s.

$$

ILZ060-064-065-181700-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Sunny. Highs in the lower 90s. South winds 5 to 10 mph.
Heat index values up to 103.
.TONIGHT...Mostly clear in the evening, then partly cloudy with a
slight chance of showers and thunderstorms after midnight. Humid
with lows in the lower 70s. South winds around 5 mph. Chance of
rain 20 percent. Heat index values up to 101 early in the
evening.
.TUESDAY...Mostly sunny with a chance of showers. A slight chance
of thunderstorms in the morning, then a chance of thunderstorms
in the afternoon. Humid with highs in the lower 90s. Southwest
winds around 5 mph, becoming west around 5 mph in the afternoon.
Chance of rain 40 percent. Heat index values up to 103.
.TUESDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms, mainly in the evening. Humid with lows in the
lower 70s. North winds around 5 mph. Chance of rain 40 percent.
Heat index values up to 100 early in the evening.
.WEDNESDAY...Mostly sunny with a slight chance of showers and
thunderstorms. Highs in the mid 80s. North winds 5 to 10 mph.
Chance of rain 20 percent.
.WEDNESDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows in
the lower 60s. Highs in the mid 80s.
.SUNDAY...Sunny. Highs around 80.

$$

ILZ079-MOZ075-181700-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Sunny. A slight chance of showers and thunderstorms this
afternoon. Hot with highs in the mid 90s. South winds around
5 mph. Chance of rain 20 percent. Heat index values up to 107.
.TONIGHT...Partly cloudy in the evening, then becoming mostly
clear. Lows in the mid 70s. South winds around 5 mph. Heat index
values up to 104 early in the evening.
.TUESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon. Hot with highs in the mid 90s.
Southwest winds around 5 mph, becoming northwest around 5 mph in
the afternoon. Chance of rain 50 percent. Heat index values up to
107.
.TUESDAY NIGHT...Partly cloudy in the evening, then becoming
mostly cloudy. A chance of showers and thunderstorms. Humid with
lows in the lower 70s. Northwest winds around 5 mph. Chance of
rain 50 percent. Heat index values up to 103 early in the
evening.
.WEDNESDAY...Partly sunny with a chance of showers and
thunderstorms. Humid with highs around 90. North winds 5 to
10 mph. Chance of rain 40 percent.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid
60s. Highs in the mid 80s.
.THURSDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows in
the mid 60s. Highs in the upper 80s.
.SUNDAY...Sunny. Highs in the mid 80s.

$$

MOZ059-062-072-073-181700-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Mostly sunny. A chance of showers and thunderstorms this
afternoon. Hot with highs in the mid 90s. South winds around
5 mph. Chance of rain 30 percent. Heat index values up to 108.
.TONIGHT...A slight chance of thunderstorms in the evening.
Partly cloudy with a slight chance of showers. Lows in the lower
70s. South winds around 5 mph. Chance of rain 20 percent. Heat
index values up to 102 early in the evening.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs in the lower 90s. Southwest winds
around 5 mph, becoming northwest in the afternoon. Chance of rain
50 percent. Heat index values up to 104.
.TUESDAY NIGHT...Partly cloudy with a chance of thunderstorms. A
chance of showers. Humid with lows in the lower 70s. North winds
around 5 mph. Chance of rain 50 percent.
.WEDNESDAY...Mostly sunny with a chance of showers and
thunderstorms. Humid with highs in the upper 80s. North winds
around 5 mph. Chance of rain 40 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 60s.
.THURSDAY THROUGH SUNDAY...Mostly clear. Highs in the mid 80s.
Lows in the lower 60s.

$$

ILZ102-MOZ065-181700-
Monroe IL-Jefferson MO-
419 AM CDT Mon Aug 18 2025

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.TODAY...Mostly sunny. A slight chance of showers and
thunderstorms this afternoon. Hot with highs in the upper 90s.
South winds around 5 mph. Chance of rain 20 percent. Heat index
values up to 111.
.TONIGHT...Partly cloudy. Lows in the mid 70s. South winds around
5 mph. Heat index values up to 106 early in the evening.
.TUESDAY...Mostly sunny with a chance of showers and
thunderstorms. Hot with highs in the mid 90s. Southwest winds
around 5 mph, becoming northwest around 5 mph in the afternoon.
Chance of rain 50 percent. Heat index values up to 108.
.TUESDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms in the evening, then mostly cloudy with a chance of
showers with a slight chance of thunderstorms after midnight.
Humid with lows in the lower 70s. North winds around 5 mph.
Chance of rain 50 percent. Heat index values up to 103 early in
the evening.
.WEDNESDAY...Partly sunny with a chance of showers. A slight
chance of thunderstorms in the morning, then a chance of
thunderstorms in the afternoon. Humid with highs in the upper
80s. North winds 5 to 10 mph. Chance of rain 40 percent.
.WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid
60s. Highs in the mid 80s.
.THURSDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows in
the mid 60s. Highs in the upper 80s.
.SUNDAY...Sunny. Highs in the lower 80s.

$$