743
FPUS53 KLSX 201618
ZFPLSX

Zone Forecasts
National Weather Service Saint Louis MO
1118 AM CDT Thu Aug 20 2026

ILZ100-101-MOZ061-063-064-210000-
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
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. North
winds 5 to 10 mph.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. Northeast winds around 5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
East winds around 5 mph, becoming west in the afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the upper 60s. Southwest winds around 5 mph.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the mid 80s. Northwest
winds 5 to 10 mph. 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 in the evening, then becoming
mostly cloudy. Lows in the lower 60s.
.MONDAY...Partly sunny with a slight chance of showers. A slight
chance of thunderstorms in the afternoon. Highs in the lower 80s.
Chance of rain 20 percent.
.MONDAY NIGHT...Partly cloudy with a slight chance of showers and
thunderstorms. Lows in the mid 60s. Chance of rain 20 percent.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 80s.
Lows in the upper 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s. Chance of
rain 20 percent.

$$

MOZ042-049-050-210000-
Audrain MO-Osage MO-Callaway MO-
Including the cities of Mexico and Fulton
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. North
winds around 5 mph.
.TONIGHT...Mostly clear. Lows in the lower 60s. East winds around
5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
South winds around 5 mph, becoming west in the afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the upper 60s. West winds around 5 mph.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 80s. North winds
5 to 10 mph. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs around 80.
.SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy
with a slight chance of showers after midnight. Lows in the lower
60s. Chance of rain 20 percent.
.MONDAY...Partly sunny. A chance of showers and thunderstorms,
mainly in the morning. Highs around 80. Chance of rain
30 percent.
.MONDAY NIGHT AND TUESDAY...Partly cloudy. Lows in the mid 60s.
Highs in the mid 80s.
.TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A slight chance of
showers and thunderstorms. Lows in the upper 60s. Highs in the
mid 80s. Chance of rain 20 percent.

$$

MOZ041-047-048-210000-
Boone MO-Moniteau MO-Cole MO-
Including the cities of Columbia and Jefferson City
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. North
winds around 5 mph.
.TONIGHT...Mostly clear. Lows in the mid 60s. East winds around
5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the upper
80s. South winds around 5 mph, becoming west in the afternoon.
.FRIDAY NIGHT...Partly cloudy. A slight chance of showers after
midnight. Lows in the upper 60s. West winds around 5 mph. Chance
of rain 20 percent.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the mid 80s. North winds
around 5 mph. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.SUNDAY NIGHT...Mostly cloudy. A chance of showers with a slight
chance of thunderstorms after midnight. Lows in the mid 60s.
Chance of rain 30 percent.
.MONDAY...Partly sunny. A chance of showers and thunderstorms,
mainly in the morning. Highs in the mid 80s. Chance of rain
40 percent.
.MONDAY NIGHT...Partly cloudy in the evening, then clearing. Lows
in the upper 60s.
.TUESDAY...Mostly sunny. Highs in the upper 80s.
.TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A slight chance of
showers and thunderstorms. Lows in the upper 60s. Highs in the
upper 80s. Chance of rain 20 percent.

$$

ILZ095>097-MOZ018-019-026-027-034>036-210000-
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
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. Northeast
winds around 5 mph.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. East winds around 5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
Southwest winds 5 to 10 mph.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. A slight chance of showers and thunderstorms. Lows in the
upper 60s. West winds around 5 mph. Chance of rain 20 percent.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 80s. North winds
5 to 10 mph. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the upper 70s.
.SUNDAY NIGHT...Mostly cloudy. Lows in the lower 60s.
.MONDAY...Partly sunny. A slight chance of showers in the
morning. Highs around 80. Chance of rain 20 percent.
.MONDAY NIGHT THROUGH WEDNESDAY...Partly cloudy. Lows in the mid
60s. Highs in the mid 80s.

$$

ILZ069-070-074-210000-
Clinton IL-Marion IL-Washington IL-
Including the cities of Centralia and Salem
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. A slight chance of showers. Highs
in the lower 80s. North winds around 5 mph. Chance of rain
20 percent.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. Northeast winds around 5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
Light and variable winds, becoming northwest around 5 mph in the
afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 60s. Southwest winds around 5 mph.
.SATURDAY...Mostly sunny. Highs in the mid 80s. Northwest winds
5 to 10 mph.
.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 AND MONDAY NIGHT...Partly cloudy. A slight chance of
showers and thunderstorms. Highs in the lower 80s. Lows in the
lower 60s. Chance of rain 20 percent.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 80s.
Lows in the mid 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s. Chance of
rain 20 percent.

$$

MOZ074-084-085-099-210000-
Saint Francois MO-Iron MO-Madison MO-Reynolds MO-
Including the city of Farmington
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the mid 80s. North winds
around 5 mph.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
mid 60s. Northeast winds around 5 mph in the evening, becoming
light and variable.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the upper
80s. Light and variable winds, becoming northeast around 5 mph in
the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 60s. Southeast
winds around 5 mph in the evening, becoming light and variable.
.SATURDAY...Mostly sunny with a slight chance of showers. A
slight chance of thunderstorms in the afternoon. Highs in the mid
80s. Northwest winds around 5 mph. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy
with a slight chance of showers and thunderstorms after midnight.
Lows in the lower 60s. Chance of rain 20 percent.
.MONDAY...Partly sunny with a slight chance of thunderstorms. A
chance of showers, mainly in the morning. Highs in the lower 80s.
Chance of rain 30 percent.
.MONDAY NIGHT AND TUESDAY...Partly cloudy. A slight chance of
showers and thunderstorms. Lows in the lower 60s. Highs in the
mid 80s. Chance of rain 20 percent.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s. Chance of
rain 20 percent.

$$

MOZ051-052-060-210000-
Montgomery MO-Lincoln MO-Warren MO-
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. Northeast
winds around 5 mph.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. Northeast winds around 5 mph in the evening, becoming
light and variable.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
South winds around 5 mph, becoming west around 5 mph in the
afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 60s. West winds around 5 mph.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the lower 80s. North winds
around 5 mph. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs around 80.
.SUNDAY NIGHT...Mostly cloudy. Lows in the lower 60s.
.MONDAY...Partly sunny with a slight chance of showers and
thunderstorms. Highs in the lower 80s. Chance of rain 20 percent.
.MONDAY NIGHT...Partly cloudy in the evening, then mostly clear
with a slight chance of showers and thunderstorms after midnight.
Lows in the mid 60s. Chance of rain 20 percent.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 80s.
Lows in the mid 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the mid 80s. Chance of
rain 20 percent.

$$

ILZ058-059-098-099-210000-
Greene IL-Macoupin IL-Calhoun IL-Jersey IL-
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. Northeast
winds 5 to 10 mph.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows around
60. Northeast winds around 5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
Southeast winds around 5 mph, becoming west around 5 mph in the
afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then partly cloudy
with a slight chance of showers after midnight. Lows in the mid
60s. Southwest winds around 5 mph. Chance of rain 20 percent.
.SATURDAY...Mostly sunny. Highs in the lower 80s. Northwest winds
5 to 10 mph.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows around 60. Highs
in the lower 80s.
.SUNDAY NIGHT...Mostly cloudy. Lows around 60.
.MONDAY THROUGH TUESDAY NIGHT...Partly cloudy. Highs in the lower
80s. Lows in the mid 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s. Chance of
rain 20 percent.

$$

ILZ060-064-065-210000-
Montgomery IL-Bond IL-Fayette IL-
Including the cities of Litchfield and Vandalia
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. North
winds around 5 mph.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. Northeast winds around 5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the lower
80s. Light and variable winds, becoming west around 5 mph in the
afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then partly cloudy
with a slight chance of showers and thunderstorms after midnight.
Lows in the mid 60s. Southwest winds around 5 mph. Chance of rain
20 percent.
.SATURDAY...Mostly sunny. Highs in the lower 80s. Northwest winds
5 to 10 mph.
.SATURDAY NIGHT...Clear. Lows in the lower 60s.
.SUNDAY...Sunny. Highs around 80.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...Partly cloudy. Lows in the
lower 60s. Highs in the lower 80s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the mid 80s. Chance of
rain 20 percent.

$$

ILZ079-MOZ075-210000-
Randolph IL-Sainte Genevieve MO-
Including the cities of Chester and Sparta
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. A slight chance of showers. Highs
in the lower 80s. North winds around 5 mph. Chance of rain
20 percent.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
mid 60s. North winds around 5 mph.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
Light and variable winds, becoming north around 5 mph in the
afternoon.
.FRIDAY NIGHT...Mostly clear. Lows in the mid 60s. Southeast
winds around 5 mph, becoming southwest after midnight.
.SATURDAY...Mostly sunny. Highs in the mid 80s. Northwest winds
5 to 10 mph.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.SUNDAY NIGHT...Mostly cloudy in the evening, then becoming
partly cloudy. Lows in the lower 60s.
.MONDAY THROUGH TUESDAY...Partly cloudy with a slight chance of
showers and thunderstorms. Highs in the lower 80s. Lows in the
lower 60s. Chance of rain 20 percent.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the mid 80s. Chance of
rain 20 percent.

$$

MOZ059-062-072-073-210000-
Gasconade MO-Franklin MO-Crawford MO-Washington MO-
Including the cities of Washington, Union, and Sullivan
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Partly sunny. Highs in the lower 80s. North
winds around 5 mph.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. Northeast winds around 5 mph in the evening, becoming
light and variable.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
South winds around 5 mph, becoming northwest in the afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 60s. Southwest winds around 5 mph.
.SATURDAY...Mostly sunny with a slight chance of showers. A
slight chance of thunderstorms in the afternoon. Highs in the mid
80s. Northwest winds around 5 mph. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.SUNDAY NIGHT...Mostly cloudy. A slight chance of showers and
thunderstorms after midnight. Lows in the lower 60s. Chance of
rain 20 percent.
.MONDAY...Partly sunny. A chance of showers and thunderstorms,
mainly in the morning. Highs in the lower 80s. Chance of rain
30 percent.
.MONDAY NIGHT...Partly cloudy in the evening, then clearing. A
slight chance of showers and thunderstorms. Lows in the mid 60s.
Chance of rain 20 percent.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 80s.
Lows in the mid 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s. Chance of
rain 20 percent.

$$

ILZ102-MOZ065-210000-
Monroe IL-Jefferson MO-
1118 AM CDT Thu Aug 20 2026

.THIS AFTERNOON...Mostly cloudy early, then becoming partly
sunny. A slight chance of showers. Highs in the lower 80s. North
winds around 5 mph. Chance of rain 20 percent.
.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. Northeast winds around 5 mph in the evening, becoming
light and variable.
.FRIDAY...Patchy fog in the morning. Sunny. Highs in the mid 80s.
Light and variable winds, becoming northwest around 5 mph in the
afternoon.
.FRIDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 60s. Southwest winds around 5 mph.
.SATURDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the morning. Highs in the mid 80s. Northwest
winds around 5 mph. Chance of rain 20 percent.
.SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 60s.
Highs in the lower 80s.
.SUNDAY NIGHT...Mostly cloudy. Lows in the lower 60s.
.MONDAY...Partly sunny with a slight chance of showers and
thunderstorms. Highs in the lower 80s. Chance of rain 20 percent.
.MONDAY NIGHT AND TUESDAY...Partly cloudy. A slight chance of
showers and thunderstorms. Lows in the mid 60s. Highs in the mid
80s. Chance of rain 20 percent.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 60s.
.WEDNESDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s. Chance of
rain 20 percent.

$$