037
FPUS53 KLSX 220353
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
1053 PM CDT Tue Jul 21 2026

ILZ100-101-MOZ061-063-064-221100-
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
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the upper 60s.
North winds 5 to 10 mph.
.WEDNESDAY...Mostly sunny. Highs in the lower 80s. North winds
5 to 10 mph.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows in the lower 60s. Northeast winds 5 to 10 mph.
.THURSDAY...Mostly sunny. Highs in the lower 80s. East winds
around 5 mph.
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a slight chance of showers after midnight. Lows in
the lower 60s. East winds around 5 mph. Chance of rain
20 percent.
.FRIDAY...Partly sunny in the morning, then becoming mostly
cloudy. A chance of showers. A slight chance of thunderstorms in
the afternoon. Highs in the upper 70s. Chance of rain 50 percent.
.FRIDAY NIGHT...Mostly 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
50 percent.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Warmer with highs in the upper 80s.
Chance of rain 20 percent. Heat index values up to 100 in the
afternoon.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Hot. Lows in
the mid 70s. Highs in the mid 90s. Heat index values up to 110.
.TUESDAY...Mostly sunny. Highs in the lower 90s. Heat index
values up to 100.

$$

MOZ042-049-050-221100-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Clear, cooler with lows in the mid 60s. North winds
5 to 10 mph.
.WEDNESDAY...Sunny. Highs in the lower 80s. North winds 5 to
10 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the lower 60s. Northeast winds 5 to 10 mph.
.THURSDAY...Mostly sunny. Highs in the lower 80s. East winds
around 5 mph.
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a chance of showers with a slight chance of
thunderstorms after midnight. Lows in the lower 60s. East winds
around 5 mph. Chance of rain 50 percent.
.FRIDAY...Showers likely with a slight chance of thunderstorms.
Highs in the upper 70s. Chance of rain 70 percent.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers and
thunderstorms. Lows in the mid 60s. Chance of rain 50 percent.
.SATURDAY...Mostly sunny. Warmer with highs in the upper 80s.
Heat index values up to 100 in the afternoon.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Hot. Lows in
the mid 70s. Highs in the mid 90s. Heat index values up to 105.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

MOZ041-047-048-221100-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Clear, cooler with lows in the mid 60s. North winds
around 5 mph.
.WEDNESDAY...Sunny. Highs in the mid 80s. North winds around
5 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the mid 60s. Northeast winds around 5 mph.
.THURSDAY...Mostly sunny. Highs in the lower 80s. East winds
around 5 mph.
.THURSDAY NIGHT...Mostly cloudy. A chance of showers with a
slight chance of thunderstorms after midnight. Lows in the mid
60s. East winds around 5 mph. Chance of rain 50 percent.
.FRIDAY...A slight chance of thunderstorms. Showers. Highs in the
upper 70s. Chance of rain 80 percent.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers and
thunderstorms. Lows in the upper 60s. Chance of rain 50 percent.
.SATURDAY...Mostly sunny. Warmer with highs in the lower 90s.
Heat index values up to 105 in the afternoon.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Hot. Lows in
the mid 70s. Highs in the mid 90s. Heat index values up to 110.
.TUESDAY...Mostly sunny. Highs in the lower 90s. Heat index
values up to 100 in the afternoon.

$$

ILZ095>097-MOZ018-019-026-027-034>036-221100-
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
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the lower 60s.
North winds around 5 mph.
.WEDNESDAY...Sunny in the morning, then becoming partly sunny.
Highs around 80. North winds 5 to 10 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the upper 50s. Northeast winds 5 to 10 mph.
.THURSDAY...Sunny. Highs around 80. East winds around 5 mph.
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a chance of showers after midnight. Lows in the lower
60s. East winds around 5 mph. Chance of rain 50 percent.
.FRIDAY...Showers likely in the morning, then a chance of showers
with a slight chance of thunderstorms in the afternoon. Highs in
the mid 70s. Chance of rain 70 percent.
.FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and
thunderstorms. Lows in the mid 60s. Chance of rain 20 percent.
.SATURDAY...Mostly sunny. Warmer with highs in the upper 80s.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 70s.
Highs in the mid 90s. Heat index values up to 110.
.SUNDAY 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 110 early in the evening.
.MONDAY THROUGH TUESDAY...Mostly clear. Highs in the lower 90s.
Lows in the lower 70s. Heat index values up to 105.

$$

ILZ069-070-074-221100-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the upper 60s.
North winds 5 to 10 mph.
.WEDNESDAY...Mostly sunny. Highs in the lower 80s. North winds
5 to 10 mph.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows in the lower 60s. Northeast winds 5 to 10 mph.
.THURSDAY...Sunny. Highs in the upper 70s. Northeast winds around
5 mph.
.THURSDAY NIGHT...Mostly cloudy. Lows in the lower 60s. Northeast
winds around 5 mph in the evening, becoming light and variable.
.FRIDAY...Partly sunny in the morning, then becoming mostly
cloudy. A 40 percent chance of showers. Highs in the upper 70s.
.FRIDAY NIGHT...Mostly 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 60s. Chance of
rain 50 percent.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the upper 80s. Chance of
rain 20 percent.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows in the
lower 70s. Highs in the mid 90s. Heat index values up to 110.
.MONDAY...Mostly sunny. Hot with highs in the mid 90s. Heat index
values up to 110.
.MONDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 70s. Heat index values up to 105 early in
the evening.
.TUESDAY...Mostly sunny. Highs in the lower 90s. Heat index
values up to 100.

$$

MOZ074-084-085-099-221100-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the mid 60s. North
winds around 5 mph.
.WEDNESDAY...Sunny, cooler with highs in the lower 80s. North
winds 5 to 10 mph.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 60s.
Northeast winds around 5 mph.
.THURSDAY...Sunny. Highs in the lower 80s. Northeast winds around
5 mph.
.THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. East
winds around 5 mph in the evening, becoming light and variable.
.FRIDAY...Partly sunny in the morning, then becoming mostly
cloudy. A slight chance of thunderstorms. A chance of showers,
mainly in the morning. Highs in the lower 80s. Chance of rain
50 percent.
.FRIDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A
chance of showers. Lows in the mid 60s. Chance of rain
50 percent.
.SATURDAY...Mostly sunny. A chance of showers and thunderstorms
in the morning. Highs in the upper 80s. Chance of rain
50 percent.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Hot. Lows in
the lower 70s. Highs in the mid 90s. Heat index values up to 105.
.TUESDAY...Mostly sunny. Highs in the lower 90s. Heat index
values up to 100.

$$

MOZ051-052-060-221100-
Montgomery MO-Lincoln MO-Warren MO-
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Much cooler with lows in the mid 60s.
North winds around 5 mph.
.WEDNESDAY...Sunny. Highs in the lower 80s. North winds around
5 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the lower 60s. Northeast winds around 5 mph.
.THURSDAY...Sunny. Highs in the lower 80s. East winds around
5 mph.
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a chance of showers after midnight. Lows in the lower
60s. East winds around 5 mph. Chance of rain 40 percent.
.FRIDAY...A slight chance of thunderstorms. Showers likely. Highs
in the upper 70s. Chance of rain 70 percent.
.FRIDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A
chance of showers. Lows in the mid 60s. Chance of rain
50 percent.
.SATURDAY...Mostly sunny. Warmer with highs in the upper 80s.
Heat index values up to 100 in the afternoon.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Hot. Lows in
the lower 70s. Highs in the mid 90s. Heat index values up to 110.
.TUESDAY...Mostly sunny. Highs in the lower 90s. Heat index
values up to 100.

$$

ILZ058-059-098-099-221100-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the mid 60s. North
winds 5 to 10 mph.
.WEDNESDAY...Sunny in the morning, then becoming partly sunny.
Highs around 80. North winds 5 to 10 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the upper 50s. Northeast winds 5 to 10 mph.
.THURSDAY...Sunny. Highs around 80. East winds around 5 mph.
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a slight chance of showers after midnight. Lows
around 60. East winds around 5 mph. Chance of rain 20 percent.
.FRIDAY...Partly sunny in the morning, then becoming mostly
cloudy. A 50 percent chance of showers. Highs in the upper 70s.
.FRIDAY NIGHT...Mostly cloudy. A slight chance of showers and
thunderstorms in the evening, then a chance of showers and
thunderstorms after midnight. Lows in the lower 60s. Chance of
rain 50 percent.
.SATURDAY...Mostly sunny. Warmer with highs in the upper 80s.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows around 70. Highs
in the mid 90s. Heat index values up to 105.
.SUNDAY NIGHT...Mostly clear in the evening, then partly cloudy
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 105 early in the evening.
.MONDAY THROUGH TUESDAY...Mostly clear. Highs in the lower 90s.
Lows in the lower 70s. Heat index values up to 105.

$$

ILZ060-064-065-221100-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the mid 60s. North
winds 5 to 10 mph.
.WEDNESDAY...Sunny in the morning, then becoming partly sunny.
Cooler with highs in the upper 70s. North winds 5 to 10 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the upper 50s. Northeast winds 5 to 10 mph.
.THURSDAY...Mostly sunny. Highs in the upper 70s. East winds
around 5 mph.
.THURSDAY NIGHT...Mostly cloudy. Lows in the upper 50s. East
winds around 5 mph in the evening, becoming light and variable.
.FRIDAY...Partly sunny in the morning, then becoming mostly
cloudy. A 40 percent chance of showers. Highs in the upper 70s.
.FRIDAY NIGHT...Mostly cloudy with a slight chance of showers. A
slight chance of thunderstorms after midnight. Lows in the lower
60s. Chance of rain 20 percent.
.SATURDAY...Mostly sunny. Highs in the mid 80s.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows around 70. Highs
in the lower 90s. Heat index values up to 105.
.SUNDAY 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 105 early in the evening.
.MONDAY...Mostly sunny. Highs in the lower 90s. Heat index values
up to 105 in the afternoon.
.MONDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the lower 70s. Heat index values up to 105 early
in the evening.
.TUESDAY...Mostly sunny. Highs around 90.

$$

ILZ079-MOZ075-221100-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the upper 60s.
North winds 5 to 10 mph.
.WEDNESDAY...Mostly sunny. Cooler with highs in the lower 80s.
North winds 5 to 10 mph.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows in the lower 60s. Northeast winds 5 to 10 mph.
.THURSDAY...Sunny. Highs around 80. Northeast winds around 5 mph.
.THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. East
winds around 5 mph.
.FRIDAY...Partly sunny in the morning, then becoming mostly
cloudy. A chance of showers with a slight chance of
thunderstorms. Highs around 80. Chance of rain 40 percent.
.FRIDAY NIGHT...Mostly cloudy with a chance of showers and
thunderstorms. Lows in the mid 60s. Chance of rain 50 percent.
.SATURDAY...Mostly sunny. A chance of showers and thunderstorms
in the morning. Highs in the upper 80s. Chance of rain
50 percent. Heat index values up to 100 in the afternoon.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Hot. Lows in
the lower 70s. Highs in the mid 90s. Heat index values up to 110.
.MONDAY...Mostly sunny. Hot with highs in the upper 90s. Heat
index values up to 110 in the afternoon.
.MONDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 70s. Heat index values up to 110 early in
the evening.
.TUESDAY...Mostly sunny. Highs in the lower 90s. Heat index
values up to 100.

$$

MOZ059-062-072-073-221100-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the mid 60s. North
winds around 5 mph.
.WEDNESDAY...Sunny. Highs in the lower 80s. North winds around
5 mph.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the lower 60s. Northeast winds around 5 mph.
.THURSDAY...Mostly sunny. Highs in the lower 80s. East winds
around 5 mph.
.THURSDAY NIGHT...Partly cloudy in the evening, then mostly
cloudy with a slight chance of showers and thunderstorms after
midnight. Lows in the lower 60s. East winds around 5 mph. Chance
of rain 20 percent.
.FRIDAY...Mostly cloudy with a chance of showers with a slight
chance of thunderstorms. Highs in the upper 70s. Chance of rain
50 percent.
.FRIDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A
chance of showers. Lows in the mid 60s. Chance of rain
50 percent.
.SATURDAY...Mostly sunny. A chance of showers and thunderstorms
in the morning. Warmer with highs around 90. Chance of rain
50 percent. Heat index values up to 100 in the afternoon.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Hot. Lows in
the lower 70s. Highs in the upper 90s. Heat index values up to
110.
.TUESDAY...Mostly sunny. Highs in the lower 90s.

$$

ILZ102-MOZ065-221100-
Monroe IL-Jefferson MO-
1053 PM CDT Tue Jul 21 2026

.OVERNIGHT...Mostly clear. Cooler with lows in the mid 60s. North
winds 5 to 10 mph.
.WEDNESDAY...Mostly sunny. Highs in the lower 80s. North winds
around 5 mph.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows in the lower 60s. Northeast winds around 5 mph.
.THURSDAY...Mostly sunny. Highs in the lower 80s. East winds
around 5 mph.
.THURSDAY NIGHT...Partly cloudy in the evening, then becoming
mostly cloudy. Lows in the lower 60s. East winds around 5 mph.
.FRIDAY...Partly sunny in the morning, then becoming mostly
cloudy. A chance of showers with a slight chance of
thunderstorms. Highs in the upper 70s. Chance of rain 50 percent.
.FRIDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A
chance of showers. Lows in the mid 60s. Chance of rain
50 percent.
.SATURDAY...Mostly sunny. A chance of showers and thunderstorms
in the morning. Warmer with highs in the upper 80s. Chance of
rain 50 percent. Heat index values up to 100 in the afternoon.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Mostly clear. Hot. Lows in
the lower 70s. Highs in the upper 90s. Heat index values up to
110.
.TUESDAY...Mostly sunny. Highs in the lower 90s. Heat index
values up to 105.

$$