Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
406 FPUS53 KLSX 301732 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 1232 PM CDT Sun Aug 30 2026 ILZ100-101-MOZ061-063-064-310100- 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 1232 PM CDT Sun Aug 30 2026 ...EXTREME HEAT WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH FRIDAY EVENING... .THIS AFTERNOON...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph. .MONDAY...Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 102 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. .TUESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Hot. Lows in the upper 70s. Highs around 100. Heat index values up to 105. .FRIDAY...Mostly sunny. A slight chance of showers in the morning. Hot with highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 105. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. A slight chance of showers and thunderstorms. Hot. Lows in the mid 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. $$ MOZ042-049-050-310100- Audrain MO-Osage MO-Callaway MO- Including the cities of Mexico and Fulton 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph with gusts up to 20 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 100 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. .TUESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105. .FRIDAY...Mostly sunny. Hot with highs in the mid 90s. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SATURDAY...Mostly sunny. Highs in the lower 90s. $$ MOZ041-047-048-310100- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny, hot with highs in the upper 90s. South winds 10 to 15 mph. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 100 early in the evening. .MONDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 103 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. .TUESDAY NIGHT THROUGH FRIDAY...Mostly clear. Hot. Lows in the upper 70s. Highs in the upper 90s. Heat index values up to 105. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. Lows in the mid 70s. Highs in the mid 90s. Heat index values up to 105. $$ ILZ095>097-MOZ018-019-026-027-034>036-310100- Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO- Including the cities of Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Mostly sunny. Highs in the mid 90s. South winds around 10 mph with gusts up to 20 mph. Heat index values up to 100. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 25 mph. Heat index values up to 104 in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 103 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. .TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...Mostly clear. Hot. Lows in the upper 70s. Highs in the upper 90s. Heat index values up to 105. .THURSDAY THROUGH FRIDAY...Partly cloudy. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 105. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the lower 90s. Chance of rain 20 percent. $$ ILZ069-074-310100- Clinton IL-Washington IL- 1232 PM CDT Sun Aug 30 2026 ...EXTREME HEAT WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH FRIDAY EVENING... .THIS AFTERNOON...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph. Heat index values up to 103. .MONDAY NIGHT...Clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 105. .TUESDAY NIGHT...Clear. Lows in the mid 70s. Heat index values up to 100 early in the evening. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Hot. Highs in the upper 90s. Lows in the upper 70s. Heat index values up to 105. .FRIDAY...Mostly sunny. A slight chance of showers in the morning. Hot with highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 105. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 105 early in the evening. .SATURDAY...Mostly sunny. A chance of showers with a slight chance of thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 30 percent. Heat index values up to 100. $$ ILZ070-310100- Marion IL- Including the cities of Centralia and Salem 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. .TUESDAY NIGHT...Clear. Lows in the upper 70s. Heat index values up to 100 early in the evening. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Hot. Highs in the upper 90s. Lows in the upper 70s. Heat index values up to 105. .FRIDAY...Mostly sunny. A slight chance of showers in the morning. Hot with highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 100. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. .SATURDAY...Mostly sunny. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. $$ MOZ074-084-085-099-310100- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny. Highs in the lower 90s. South winds around 5 mph. .TONIGHT...Mostly clear. Lows in the upper 60s. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. .MONDAY NIGHT...Clear. Lows in the lower 70s. South winds around 5 mph. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 103. .TUESDAY NIGHT AND WEDNESDAY...Clear, hot. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 105. .WEDNESDAY NIGHT THROUGH FRIDAY NIGHT...Mostly clear. Hot. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 105. .SATURDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. $$ MOZ051-052-060-310100- Montgomery MO-Lincoln MO-Warren MO- 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny. Highs in the mid 90s. South winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph. .MONDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 102 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. .TUESDAY NIGHT THROUGH THURSDAY...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105. .THURSDAY NIGHT AND FRIDAY...Partly cloudy. Hot. Lows in the mid 70s. Highs in the mid 90s. Heat index values up to 105. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SATURDAY...Mostly sunny. Highs in the lower 90s. Heat index values up to 100. $$ ILZ058-059-098-099-310100- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny. Highs in the mid 90s. South winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph. .MONDAY...Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. .TUESDAY NIGHT...Clear. Lows in the upper 70s. Heat index values up to 100 early in the evening. .WEDNESDAY THROUGH THURSDAY...Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 105. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 100 early in the evening. .FRIDAY...Mostly sunny. A slight chance of showers in the morning. Hot with highs in the upper 90s. Chance of rain 20 percent. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. $$ ILZ060-064-065-310100- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny. Highs in the lower 90s. South winds 5 to 10 mph with gusts up to 20 mph. .TONIGHT...Mostly clear. Lows around 70. South winds 5 to 10 mph. .MONDAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 101 in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. South winds around 5 mph. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. .TUESDAY NIGHT...Clear. Lows in the upper 70s. Heat index values up to 100 early in the evening. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 105. .FRIDAY...Mostly sunny. A slight chance of showers in the morning. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .FRIDAY NIGHT...Mostly clear with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SATURDAY...Mostly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. $$ ILZ079-310100- Randolph IL- Including the cities of Chester and Sparta 1232 PM CDT Sun Aug 30 2026 ...EXTREME HEAT WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH FRIDAY EVENING... .THIS AFTERNOON...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows around 70. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 103. .MONDAY NIGHT...Clear. Lows in the lower 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 105. .TUESDAY NIGHT...Clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 105. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Hot. Highs in the upper 90s. Lows in the lower 70s. Heat index values up to 105. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. $$ MOZ075-310100- Sainte Genevieve MO- 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows around 70. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 103 in the afternoon. .MONDAY NIGHT...Clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 100 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 105. .TUESDAY NIGHT...Clear. Lows in the mid 70s. Heat index values up to 100 early in the evening. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105. .SATURDAY...Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. $$ MOZ059-062-072-073-310100- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny. Highs in the mid 90s. South winds around 5 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 103 in the afternoon. .MONDAY NIGHT...Clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. .TUESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. $$ ILZ102-310100- Monroe IL- 1232 PM CDT Sun Aug 30 2026 ...EXTREME HEAT WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH FRIDAY EVENING... .THIS AFTERNOON...Sunny. Highs in the mid 90s. South winds around 5 mph. .TONIGHT...Mostly clear. Lows around 70. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph. Heat index values up to 105 in the afternoon. .MONDAY NIGHT...Clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 102 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 107. .TUESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 110. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 110. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. $$ MOZ065-310100- Jefferson MO- 1232 PM CDT Sun Aug 30 2026 ...HEAT ADVISORY IN EFFECT FROM NOON MONDAY TO 8 PM CDT FRIDAY... .THIS AFTERNOON...Sunny, hot with highs in the mid 90s. South winds around 5 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds around 5 mph. .MONDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 105 in the afternoon. .MONDAY NIGHT...Clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 107. .TUESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 110. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 110. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. $$