042
FPUS53 KLSX 180627
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
127 AM CDT Tue Aug 18 2026

ILZ100-101-MOZ061-063-064-181400-
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
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
upper 60s. Light and variable winds.
.TUESDAY...Sunny. Highs in the upper 80s. Southwest winds around
5 mph.
.TUESDAY NIGHT...Mostly clear in the evening, then mostly cloudy
with numerous showers and thunderstorms after midnight. Lows
around 70. South winds around 5 mph. Chance of rain 70 percent.
.WEDNESDAY...Cloudy with showers and numerous thunderstorms in
the morning, then partly sunny with scattered showers and
thunderstorms in the afternoon. Humid with highs in the lower
80s. South winds 5 to 10 mph, becoming northeast in the
afternoon. Chance of rain 80 percent.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of showers.
Scattered thunderstorms, mainly in the evening. Lows in the upper
60s. Northeast winds around 5 mph. Chance of rain 50 percent.
.THURSDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 80s. Chance of
rain 20 percent.
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s.
Highs in the mid 80s.
.FRIDAY NIGHT...Mostly clear. A slight chance of showers after
midnight. Lows in the upper 60s. Chance of rain 20 percent.
.SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the upper
80s. Lows in the mid 60s.
.SUNDAY...Mostly sunny. Highs in the mid 80s.
.SUNDAY NIGHT AND MONDAY...Partly cloudy. A 20 percent chance of
showers. Lows in the mid 60s. Highs in the mid 80s.

$$

MOZ042-049-050-181400-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Southeast winds around 5 mph.
.TUESDAY...Mostly sunny. Highs in the upper 80s. South winds 5 to
10 mph.
.TUESDAY NIGHT...Mostly clear in the evening, then showers and
thunderstorms after midnight. Lows in the upper 60s. East winds
5 to 10 mph with gusts up to 20 mph. Chance of rain near
100 percent.
.WEDNESDAY...Mostly cloudy. Showers and thunderstorms in the
morning, then scattered showers with isolated thunderstorms in
the afternoon. Highs around 80. East winds 5 to 10 mph, becoming
northeast in the afternoon. Chance of rain 80 percent.
.WEDNESDAY 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. Northeast
winds around 5 mph. Chance of rain 50 percent.
.THURSDAY...Mostly sunny. Highs in the lower 80s.
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s.
Highs in the mid 80s.
.FRIDAY NIGHT...Mostly clear. A slight chance of showers and
thunderstorms after midnight. Lows in the mid 60s. Chance of rain
20 percent.
.SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the mid
80s. Lows in the mid 60s.
.SUNDAY...Mostly sunny. A slight chance of showers in the
afternoon. Highs in the lower 80s. Chance of rain 20 percent.
.SUNDAY NIGHT AND MONDAY...Partly cloudy. A 40 percent chance of
showers. Lows in the mid 60s. Highs in the mid 80s.

$$

MOZ041-047-048-181400-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Southeast winds around 5 mph.
.TUESDAY...Mostly sunny. Highs around 90. South winds 5 to
10 mph.
.TUESDAY NIGHT...Mostly clear in the evening, then showers and
thunderstorms after midnight. Lows around 70. East winds 5 to
10 mph. Chance of rain near 100 percent.
.WEDNESDAY...Mostly cloudy. Showers and thunderstorms in the
morning, then scattered showers with isolated thunderstorms in
the afternoon. Highs in the lower 80s. East winds 5 to 10 mph.
Chance of rain 80 percent.
.WEDNESDAY NIGHT...Mostly cloudy. A slight chance of showers and
thunderstorms after midnight. Lows in the upper 60s. Northeast
winds around 5 mph. Chance of rain 20 percent.
.THURSDAY...Partly sunny in the morning, then clearing. Highs in
the mid 80s.
.THURSDAY NIGHT THROUGH SATURDAY NIGHT...Mostly clear. Lows in
the upper 60s. Highs in the upper 80s.
.SUNDAY...Mostly sunny with a 20 percent chance of showers. Highs
in the mid 80s.
.SUNDAY NIGHT...Partly cloudy. A slight chance of showers in the
evening, then a chance of showers after midnight. Lows in the
upper 60s. Chance of rain 40 percent.
.MONDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the upper 80s. Chance of
rain 20 percent.

$$

ILZ095>097-MOZ018-019-026-027-034>036-181400-
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
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Southwest winds around 5 mph.
.TUESDAY...Partly sunny. Highs in the mid 80s. Southwest winds
5 to 10 mph.
.TUESDAY NIGHT...Mostly cloudy. Isolated showers in the evening,
then showers and numerous thunderstorms after midnight. Lows in
the upper 60s. Southwest winds around 5 mph, becoming northeast
after midnight. Chance of rain 90 percent.
.WEDNESDAY...Mostly cloudy with numerous showers and
thunderstorms in the morning, then partly sunny with isolated
showers and thunderstorms in the afternoon. Highs in the upper
70s. East winds around 5 mph. Chance of rain 70 percent.
.WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms after midnight. Lows in the mid 60s. Northeast
winds around 5 mph. Chance of rain 20 percent.
.THURSDAY...Mostly sunny. Highs in the lower 80s.
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s.
Highs in the mid 80s.
.FRIDAY NIGHT...Mostly clear with a slight chance of showers and
thunderstorms. Lows in the mid 60s. Chance of rain 20 percent.
.SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the lower
80s. Lows in the lower 60s.
.SUNDAY...Mostly sunny. Highs in the lower 80s.
.SUNDAY NIGHT...Mostly cloudy in the evening, then becoming
partly cloudy. A 20 percent chance of showers. Lows in the mid
60s.
.MONDAY...Partly sunny. A slight chance of showers in the
morning. Highs in the lower 80s. Chance of rain 20 percent.

$$

ILZ069-070-074-181400-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Light and variable winds.
.TUESDAY...Sunny. Highs in the mid 80s. Southwest winds around
5 mph.
.TUESDAY NIGHT...Mostly clear in the evening, then partly cloudy
with scattered thunderstorms with isolated showers after
midnight. Lows in the upper 60s. South winds around 5 mph. Chance
of rain 50 percent.
.WEDNESDAY...Mostly cloudy. Showers and numerous thunderstorms in
the morning, then scattered showers and thunderstorms in the
afternoon. Highs in the lower 80s. West winds 5 to 10 mph,
becoming southwest in the afternoon. Chance of rain 80 percent.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of thunderstorms.
A chance of showers in the evening, then showers likely after
midnight. Lows in the upper 60s. Northeast winds around 5 mph in
the evening, becoming light and variable. Chance of rain
70 percent.
.THURSDAY...Partly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 80s. Chance of
rain 20 percent.
.THURSDAY NIGHT THROUGH FRIDAY NIGHT...Mostly clear. Lows in the
mid 60s. Highs in the mid 80s.
.SATURDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Highs in the mid 80s. Chance of rain
20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the mid 60s.
Highs in the lower 80s.
.SUNDAY NIGHT...Partly cloudy. Lows in the mid 60s.
.MONDAY...Mostly sunny. A slight chance of showers in the
morning. Highs in the mid 80s. Chance of rain 20 percent.

$$

MOZ074-084-085-099-181400-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Light and variable winds.
.TUESDAY...Sunny. Highs around 90. South winds around 5 mph.
.TUESDAY NIGHT...Mostly clear. Scattered showers and
thunderstorms after midnight. Lows in the upper 60s. Southeast
winds around 5 mph. Chance of rain 50 percent.
.WEDNESDAY...Partly sunny. Numerous showers and thunderstorms,
mainly in the morning. Highs in the upper 80s. Northeast winds
5 to 10 mph with gusts up to 25 mph, becoming south in the
afternoon. Chance of rain 70 percent.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of thunderstorms.
A chance of showers in the evening, then showers likely after
midnight. Lows in the upper 60s. East winds around 5 mph in the
evening, becoming light and variable. Chance of rain 70 percent.
.THURSDAY...Mostly cloudy with a chance of showers and
thunderstorms in the morning, then mostly sunny in the afternoon.
Highs in the mid 80s. Chance of rain 40 percent.
.THURSDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Lows in the mid 60s.
.FRIDAY THROUGH SATURDAY NIGHT...Mostly clear. Highs in the upper
80s. Lows in the mid 60s.
.SUNDAY...Sunny. A slight chance of showers in the afternoon.
Highs in the mid 80s. Chance of rain 20 percent.
.SUNDAY NIGHT...Partly cloudy. A slight chance of showers in the
evening, then a chance of showers after midnight. Lows in the mid
60s. Chance of rain 30 percent.
.MONDAY...Mostly sunny. A slight chance of showers in the
morning. Highs in the mid 80s. Chance of rain 20 percent.

$$

MOZ051-052-060-181400-
Montgomery MO-Lincoln MO-Warren MO-
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Light and variable winds.
.TUESDAY...Mostly sunny. Highs in the mid 80s. Southwest winds
around 5 mph.
.TUESDAY NIGHT...Mostly clear in the evening, then mostly cloudy
with showers and thunderstorms after midnight. Lows in the upper
60s. Southeast winds around 5 mph, becoming northeast after
midnight. Chance of rain 90 percent.
.WEDNESDAY...Mostly cloudy. Showers and thunderstorms in the
morning, then scattered showers with isolated thunderstorms in
the afternoon. Highs in the lower 80s. Southeast winds 5 to
10 mph, becoming northeast in the afternoon. Chance of rain
80 percent.
.WEDNESDAY 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. Northeast
winds around 5 mph in the evening, becoming light and variable.
Chance of rain 50 percent.
.THURSDAY...Mostly sunny. Highs in the lower 80s.
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the lower 60s.
Highs in the mid 80s.
.FRIDAY NIGHT...Mostly clear with a slight chance of showers and
thunderstorms. Lows in the mid 60s. Chance of rain 20 percent.
.SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the mid
80s. Lows in the lower 60s.
.SUNDAY...Mostly sunny. Highs in the lower 80s.
.SUNDAY NIGHT...Partly cloudy. A chance of showers after
midnight. Lows in the mid 60s. Chance of rain 30 percent.
.MONDAY...Partly sunny. A slight chance of showers in the
morning. Highs in the mid 80s. Chance of rain 20 percent.

$$

ILZ058-059-098-099-181400-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Light and variable winds.
.TUESDAY...Mostly sunny. Highs in the mid 80s. Southwest winds
around 5 mph.
.TUESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy
with numerous showers and thunderstorms after midnight. Lows in
the upper 60s. Southeast winds around 5 mph, becoming east around
5 mph after midnight. Chance of rain 70 percent.
.WEDNESDAY...Mostly cloudy with showers and numerous
thunderstorms in the morning, then partly sunny with scattered
showers with isolated thunderstorms in the afternoon. Highs in
the lower 80s. South winds around 5 mph, becoming north in the
afternoon. Chance of rain 70 percent.
.WEDNESDAY 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. Northeast
winds around 5 mph. Chance of rain 40 percent.
.THURSDAY...Mostly sunny. Highs in the lower 80s.
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the lower 60s.
Highs in the mid 80s.
.FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of
showers and thunderstorms. Lows in the mid 60s. Highs in the mid
80s. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.SUNDAY NIGHT AND MONDAY...Partly cloudy. A 20 percent chance of
showers. Lows in the lower 60s. Highs in the lower 80s.

$$

ILZ060-064-065-181400-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Light and variable winds.
.TUESDAY...Sunny. Highs in the lower 80s. Southwest winds around
5 mph.
.TUESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy
with scattered showers and thunderstorms after midnight. Lows in
the upper 60s. South winds around 5 mph. Chance of rain
50 percent.
.WEDNESDAY...Mostly cloudy. Showers and numerous thunderstorms in
the morning, then scattered showers and thunderstorms in the
afternoon. Highs in the lower 80s. West winds around 5 mph.
Chance of rain 80 percent.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of showers.
Scattered thunderstorms, mainly in the evening. Lows in the mid
60s. Northeast winds around 5 mph. Chance of rain 50 percent.
.THURSDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 80s. Chance of
rain 20 percent.
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.FRIDAY NIGHT...Mostly clear. A slight chance of showers after
midnight. Lows in the mid 60s. Chance of rain 20 percent.
.SATURDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Highs in the mid 80s. Chance of rain
20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.SUNDAY NIGHT...Partly cloudy. Lows in the lower 60s.
.MONDAY...Mostly sunny. A slight chance of showers in the
morning. Highs in the lower 80s. Chance of rain 20 percent.

$$

ILZ079-MOZ075-181400-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
upper 60s. Light and variable winds.
.TUESDAY...Sunny. Highs in the upper 80s. Southwest winds around
5 mph.
.TUESDAY NIGHT...Mostly clear. Scattered showers and
thunderstorms after midnight. Lows in the upper 60s. Southeast
winds around 5 mph. Chance of rain 50 percent.
.WEDNESDAY...Mostly cloudy with numerous showers and
thunderstorms in the morning, then partly sunny with scattered
showers and thunderstorms in the afternoon. Humid with highs in
the mid 80s. South winds 5 to 10 mph. Chance of rain 70 percent.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of thunderstorms.
A chance of showers in the evening, then showers likely after
midnight. Humid with lows in the upper 60s. Northeast winds
around 5 mph. Chance of rain 70 percent.
.THURSDAY...Mostly cloudy with a slight chance of showers and
thunderstorms in the morning, then mostly sunny in the afternoon.
Highs in the lower 80s. Chance of rain 20 percent.
.THURSDAY NIGHT THROUGH SUNDAY...Mostly clear. Lows in the mid
60s. Highs in the mid 80s.
.SUNDAY NIGHT AND MONDAY...Partly cloudy. A 20 percent chance of
showers. Lows in the mid 60s. Highs in the mid 80s.

$$

MOZ059-062-072-073-181400-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Near steady temperature in the
mid 60s. Light and variable winds.
.TUESDAY...Sunny. Highs around 90. Southwest winds around 5 mph.
.TUESDAY NIGHT...Clear in the evening, then partly cloudy with
numerous showers and thunderstorms after midnight. Lows around
70. Southeast winds around 5 mph. Gusts up to 20 mph after
midnight. Chance of rain 70 percent.
.WEDNESDAY...Mostly cloudy with showers and thunderstorms in the
morning, then partly sunny with scattered showers and
thunderstorms in the afternoon. Humid with highs in the mid 80s.
Southeast winds 5 to 10 mph. Chance of rain 80 percent.
.WEDNESDAY NIGHT...Mostly cloudy. Scattered thunderstorms with a
chance of showers in the evening, then showers likely with a
slight chance of thunderstorms after midnight. Lows in the mid
60s. Northeast winds around 5 mph in the evening, becoming light
and variable. Chance of rain 70 percent.
.THURSDAY...Partly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 80s. Chance of
rain 20 percent.
.THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s.
Highs in the mid 80s.
.FRIDAY NIGHT...Mostly clear. A slight chance of showers and
thunderstorms after midnight. Lows in the mid 60s. Chance of rain
20 percent.
.SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the upper
80s. Lows in the mid 60s.
.SUNDAY...Mostly sunny. Highs in the mid 80s.
.SUNDAY NIGHT AND MONDAY...Partly cloudy. A 30 percent chance of
showers. Lows in the mid 60s. Highs in the upper 80s.

$$

ILZ102-MOZ065-181400-
Monroe IL-Jefferson MO-
127 AM CDT Tue Aug 18 2026

.REST OF TONIGHT...Mostly clear. Lows in the lower 60s. Light and
variable winds.
.TUESDAY...Sunny. Highs in the upper 80s. Southwest winds around
5 mph.
.TUESDAY NIGHT...Clear in the evening, then partly cloudy with
numerous showers and thunderstorms after midnight. Lows in the
upper 60s. Southeast winds around 5 mph. Chance of rain
70 percent.
.WEDNESDAY...Mostly cloudy with numerous showers and
thunderstorms in the morning, then partly sunny with scattered
showers and thunderstorms in the afternoon. Humid with highs in
the mid 80s. South winds 5 to 10 mph, becoming southeast in the
afternoon. Chance of rain 70 percent.
.WEDNESDAY NIGHT...Mostly cloudy. Scattered thunderstorms with a
chance of showers in the evening, then showers likely with a
slight chance of thunderstorms after midnight. Lows in the upper
60s. Northeast winds around 5 mph in the evening, becoming light
and variable. Chance of rain 70 percent.
.THURSDAY...Mostly cloudy with a slight chance of showers and
thunderstorms in the morning, then mostly sunny in the afternoon.
Highs in the lower 80s. Chance of rain 20 percent.
.THURSDAY NIGHT THROUGH SUNDAY...Mostly clear. Lows in the mid
60s. Highs in the mid 80s.
.SUNDAY NIGHT AND MONDAY...Partly cloudy. A 20 percent chance of
showers. Lows in the mid 60s. Highs in the mid 80s.

$$