Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
708 FPUS53 KLSX 181828 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 128 PM CDT Tue Aug 18 2026 ILZ100-101-MOZ061-063-064-190200- 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 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Mostly sunny. Near steady temperature in the mid 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Lows around 70. South winds around 5 mph. Chance of rain 70 percent. .WEDNESDAY...Mostly cloudy with a chance of thunderstorms. Showers, mainly in the morning. Highs around 80. Southwest winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Highs in the lower 80s. Northeast winds around 5 mph. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of showers and thunderstorms. Lows in the upper 60s. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the mid 60s. .SUNDAY...Mostly sunny. Highs in the lower 80s. .SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. $$ MOZ042-049-050-190200- Audrain MO-Osage MO-Callaway MO- Including the cities of Mexico and Fulton 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Partly sunny. Near steady temperature in the mid 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then showers with a chance of thunderstorms after midnight. Lows in the upper 60s. East winds around 5 mph. Chance of rain near 100 percent. .WEDNESDAY...Mostly cloudy with a chance of thunderstorms. Showers, mainly in the morning. Highs around 80. Southeast winds around 5 mph, becoming northeast in the afternoon. Chance of rain 90 percent. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Highs in the lower 80s. Northeast winds around 5 mph. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the lower 60s. .SUNDAY...Mostly sunny. Highs in the lower 80s. .SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ041-047-048-190200- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Partly sunny. Highs in the upper 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then mostly cloudy with showers with a chance of thunderstorms after midnight. Lows around 70. East winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY...Mostly cloudy with a chance of thunderstorms. Showers, mainly in the morning. Highs in the lower 80s. East winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 60s. Northeast winds around 5 mph. .THURSDAY...Partly sunny in the morning, then clearing. Highs in the mid 80s. Northeast winds around 5 mph. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the upper 80s. .FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of showers and thunderstorms. Lows in the upper 60s. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the mid 60s. .SUNDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. .SUNDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs around 90. Chance of rain 20 percent. $$ ILZ095>097-MOZ018-019-026-027-034>036-190200- Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO- Including the cities of Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Mostly cloudy. Near steady temperature in the lower 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Lows in the upper 60s. South winds around 5 mph. Chance of rain 70 percent. .WEDNESDAY...Mostly cloudy. A chance of showers and thunderstorms, mainly in the morning. Highs around 80. Southeast winds around 5 mph, becoming northeast around 5 mph in the afternoon. Chance of rain 50 percent. .WEDNESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 30 percent. .THURSDAY...Partly sunny in the morning, then clearing. Highs in the lower 80s. Northeast winds around 5 mph. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the lower 60s. .SUNDAY...Mostly sunny. Highs around 80. .SUNDAY NIGHT...Mostly cloudy with a slight chance of showers in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 80s. Chance of rain 20 percent. $$ ILZ069-070-074-190200- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the mid 80s. Light and variable winds. .TONIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 60s. South winds around 5 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. Showers with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs around 80. Southwest winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. North winds around 5 mph in the evening, becoming light and variable. Chance of rain 30 percent. .THURSDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Northeast winds around 5 mph. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 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 mid 80s. $$ MOZ074-084-085-099-190200- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Sunny. Highs around 90. Light and variable winds. .TONIGHT...Mostly clear in the evening, then partly cloudy with a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Southeast winds around 5 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly sunny with a slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Northeast winds around 5 mph, becoming southeast in the afternoon. Chance of rain 50 percent. .WEDNESDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 50 percent. .THURSDAY...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the morning, then mostly sunny in the afternoon. Highs in the mid 80s. Northeast winds around 5 mph. Chance of rain 40 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Mostly clear. Lows in the mid 60s. Highs in the upper 80s. .SATURDAY...Sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .SUNDAY NIGHT AND MONDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ051-052-060-190200- Montgomery MO-Lincoln MO-Warren MO- 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Partly sunny. Highs in the upper 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then mostly cloudy with showers with a chance of thunderstorms after midnight. Lows in the upper 60s. Southeast winds around 5 mph, becoming south after midnight. Chance of rain 90 percent. .WEDNESDAY...Mostly cloudy with a chance of thunderstorms. Showers, mainly in the morning. Highs in the upper 70s. South winds around 5 mph, becoming northeast in the afternoon. Chance of rain 90 percent. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Highs in the lower 80s. Northeast winds around 5 mph. .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...Mostly clear. Lows in the lower 60s. .SUNDAY...Mostly sunny. Highs in the lower 80s. .SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. $$ ILZ058-059-098-099-190200- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Partly sunny. Near steady temperature in the mid 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Lows in the upper 60s. South winds around 5 mph. Chance of rain 70 percent. .WEDNESDAY...Mostly cloudy with a chance of thunderstorms. Showers likely, mainly in the morning. Highs in the upper 70s. South winds around 5 mph, becoming north around 5 mph in the afternoon. Chance of rain 70 percent. .WEDNESDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the lower 60s. Northeast winds around 5 mph. Chance of rain 20 percent. .THURSDAY...Partly sunny in the morning, then clearing. Highs in the lower 80s. Northeast winds around 5 mph. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the lower 60s. Highs in the mid 80s. .FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the lower 60s. .SUNDAY...Mostly sunny. Highs in the lower 80s. .SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent. .MONDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the lower 80s. Chance of rain 20 percent. $$ ILZ060-064-065-190200- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Mostly sunny. Near steady temperature in the lower 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 60s. South winds around 5 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly cloudy. Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Southwest winds around 5 mph. Chance of rain 70 percent. .WEDNESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the mid 60s. North winds around 5 mph in the evening, becoming light and variable. Chance of rain 40 percent. .THURSDAY...Mostly sunny. Highs in the lower 80s. Northeast winds around 5 mph. .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 lower 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. $$ ILZ079-MOZ075-190200- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the mid 80s. South winds around 5 mph. .TONIGHT...Mostly clear in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 60s. South winds around 5 mph. Chance of rain 50 percent. .WEDNESDAY...Cloudy in the morning, then becoming partly sunny. A chance of thunderstorms. Showers, mainly in the morning. Highs in the lower 80s. South winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 40 percent. .THURSDAY...Mostly cloudy with a slight chance of showers and thunderstorms in the morning, then mostly sunny in the afternoon. Highs in the lower 80s. Northeast winds around 5 mph. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY NIGHT...Mostly clear. A slight chance of showers in the evening. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY...Sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the mid 60s. .SUNDAY...Mostly sunny. Highs in the lower 80s. .SUNDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. $$ MOZ059-062-072-073-190200- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Mostly sunny. Near steady temperature in the upper 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then mostly cloudy with showers with a chance of thunderstorms after midnight. Lows in the upper 60s. Southeast winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY...Mostly cloudy. Showers with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 80s. East winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 20 percent. .THURSDAY...Mostly cloudy with a slight chance of showers in the morning, then mostly sunny in the afternoon. Highs in the lower 80s. Northeast winds around 5 mph. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the upper 80s. .FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the lower 60s. .SUNDAY...Mostly sunny. Highs in the mid 80s. .SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ ILZ102-MOZ065-190200- Monroe IL-Jefferson MO- 128 PM CDT Tue Aug 18 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. Southwest winds around 5 mph. .TONIGHT...Partly cloudy in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Lows in the upper 60s. South winds around 5 mph. Chance of rain 70 percent. .WEDNESDAY...Mostly cloudy. Showers with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 80s. South winds around 5 mph. Chance of rain 90 percent. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 20 percent. .THURSDAY...Mostly cloudy with a slight chance of showers in the morning, then mostly sunny in the afternoon. Highs in the lower 80s. Northeast winds around 5 mph. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. .FRIDAY NIGHT AND SATURDAY...Mostly clear. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT...Mostly clear. Lows in the mid 60s. .SUNDAY...Mostly sunny. Highs in the lower 80s. .SUNDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 30 percent. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. $$