Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
528 FPUS53 KLSX 101339 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 839 AM CDT Mon Aug 10 2026 ILZ100-101-MOZ061-063-064-102100- 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 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Partly sunny. Scattered thunderstorms with isolated showers this morning. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 108 this afternoon. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 107 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 112. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 70s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 111 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 110. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105. .FRIDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 100. .FRIDAY NIGHT THROUGH SATURDAY NIGHT...Partly cloudy with 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 105. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs around 90. Chance of rain 20 percent. Heat index values up to 100. $$ MOZ049-050-102100- Osage MO-Callaway MO- Including the city of Fulton 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with scattered showers and thunderstorms this morning, then mostly sunny this afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent. Heat index values up to 106 this afternoon. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 105 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 107 in the afternoon. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 107 early in the evening. .WEDNESDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 40 percent. Heat index values up to 105 early in the evening. .THURSDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .THURSDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 100 early in the evening. .FRIDAY THROUGH SATURDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ042-102100- Audrain MO- Including the city of Mexico 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with scattered showers and thunderstorms this morning, then partly sunny this afternoon. Highs in the lower 90s. Southwest winds around 10 mph with gusts up to 25 mph. Chance of rain 40 percent. Heat index values up to 103 this afternoon. .TONIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. Southwest winds 5 to 10 mph. Heat index values up to 102 early in the evening. .TUESDAY...Sunny with highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 105 in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Southwest winds 5 to 10 mph. Heat index values up to 104 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 102. .WEDNESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 100 early in the evening. .THURSDAY...Partly sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the mid 80s. Chance of rain 50 percent. .THURSDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with showers likely with a slight chance of thunderstorms after midnight. Lows around 70. Chance of rain 60 percent. .FRIDAY...Mostly cloudy in the morning, then becoming partly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 30 percent. .SATURDAY THROUGH SUNDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 80s. Lows around 70. Chance of rain 20 percent. $$ MOZ041-047-048-102100- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with scattered showers and thunderstorms this morning, then mostly sunny this afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent. Heat index values up to 107 this afternoon. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 109 in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 108 early in the evening. .WEDNESDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 108. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .THURSDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 100 early in the evening. .FRIDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Lows in the mid 70s. Chance of rain 30 percent. .SATURDAY THROUGH SUNDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs around 90. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 105. $$ ILZ095>097-MOZ018-019-026-027-034>036-102100- 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 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with isolated showers and thunderstorms this morning, then partly sunny this afternoon. Highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 104 this afternoon. .TONIGHT...Partly cloudy in the evening, then becoming mostly clear. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 104 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 25 mph. Heat index values up to 108 in the afternoon. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 108 early in the evening. .WEDNESDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT...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 lower 70s. Chance of rain 60 percent. Heat index values up to 105 early in the evening. .THURSDAY AND THURSDAY NIGHT...Showers likely with a chance of thunderstorms. Highs in the mid 80s. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY...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. Chance of rain 40 percent. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 50 percent. .SATURDAY THROUGH SUNDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 80s. Lows in the lower 70s. Chance of rain 20 percent. $$ ILZ069-074-102100- Clinton IL-Washington IL- 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109 this afternoon. .TONIGHT...Partly cloudy. Humid with lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 113 in the afternoon. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 111 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 110. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 110. .FRIDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .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 105. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. A slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs around 90. Chance of rain 20 percent. Heat index values up to 100. $$ ILZ070-102100- Marion IL- Including the cities of Centralia and Salem 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Sunny this morning, then becoming partly sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .TONIGHT...Partly cloudy. Lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 104 early in the evening. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the morning. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 110 in the afternoon. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 106 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 106. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 100 early in the evening. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms. Highs in the upper 80s. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 100. .FRIDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Partly 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 lower 70s. Chance of rain 30 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .SATURDAY NIGHT...Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ074-084-085-099-102100- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Sunny. Highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 104. .TONIGHT...Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph. Gusts up to 20 mph after midnight. Heat index values up to 103 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .TUESDAY NIGHT...Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 103 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 106. .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 100 early in the evening. .THURSDAY THROUGH FRIDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 90s. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 105. .FRIDAY NIGHT...Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the lower 90s. Lows in the lower 70s. Heat index values up to 100. .SUNDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. $$ MOZ051-060-102100- Montgomery MO-Warren MO- 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with scattered showers and thunderstorms this morning, then partly sunny this afternoon. Highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40 percent. Heat index values up to 106 this afternoon. .TONIGHT...Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 104 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 109 in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 109 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 108. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 110 early in the evening. .THURSDAY...Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs around 90. Chance of rain 50 percent. Heat index values up to 105 in the afternoon. .THURSDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows around 70. Chance of rain 50 percent. Heat index values up to 100 early in the evening. .FRIDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .FRIDAY NIGHT THROUGH SUNDAY...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 20 percent. Heat index values up to 100. $$ MOZ052-102100- Lincoln MO- 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with scattered showers and thunderstorms this morning, then partly sunny this afternoon. Highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 105 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 110. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the upper 70s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 110 early in the evening. .WEDNESDAY...Mostly sunny. A chance of showers with a slight chance of thunderstorms in the morning. Humid with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 30 percent. Heat index values up to 109. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 110 early in the evening. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms. Highs in the upper 80s. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105. .FRIDAY...Mostly cloudy in the morning, then becoming partly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 80s. Chance of rain 50 percent. .FRIDAY NIGHT THROUGH SUNDAY...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 20 percent. Heat index values up to 100. $$ ILZ058-059-098-099-102100- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with scattered showers and thunderstorms this morning, then partly sunny this afternoon. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 104 this afternoon. .TONIGHT...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 with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109 in the afternoon. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the mid 70s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 107 early in the evening. .WEDNESDAY...Mostly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 106. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Lows in the lower 70s. Chance of rain 60 percent. Heat index values up to 105 early in the evening. .THURSDAY...Partly sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the upper 80s. Chance of rain 50 percent. .THURSDAY NIGHT...Mostly cloudy with showers likely. A chance of thunderstorms, mainly in the evening. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY...Mostly cloudy in the morning, then becoming partly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 40 percent. .SATURDAY AND SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms. Highs in the upper 80s. Lows around 70. Chance of rain 20 percent. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. $$ ILZ060-064-065-102100- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Partly sunny. Scattered showers and thunderstorms this morning. Highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 105 this afternoon. .TONIGHT...Partly cloudy. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 103 early in the evening. .TUESDAY...Sunny. A slight chance of showers and thunderstorms in the morning. Locally heavy rainfall possible in the morning. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 110 in the afternoon. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the mid 70s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 107 early in the evening. .WEDNESDAY...Mostly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 106 in the afternoon. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 100 early in the evening. .THURSDAY...Partly sunny with a chance of thunderstorms. Showers likely, mainly in the morning. Highs in the upper 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Showers likely. A chance of thunderstorms, mainly in the evening. Lows around 70. Chance of rain 70 percent. .FRIDAY...Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Partly 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 upper 60s. Chance of rain 30 percent. .SATURDAY THROUGH SUNDAY...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the upper 80s. Lows in the lower 70s. Chance of rain 20 percent. $$ ILZ079-102100- Randolph IL- Including the cities of Chester and Sparta 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 108. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 107 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 112. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 110 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the upper 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 110. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of thunderstorms. A chance of showers, mainly in the evening. Lows in the mid 70s. Chance of rain 40 percent. Heat index values up to 105 early in the evening. .THURSDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110 in the afternoon. .THURSDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 105 early in the evening. .FRIDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .FRIDAY NIGHT...Mostly clear with a slight chance of showers and thunderstorms. 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 and thunderstorms in the morning. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. A slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SUNDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105. $$ MOZ075-102100- Sainte Genevieve MO- 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 108 this afternoon. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 110. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 108 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 109. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110. .THURSDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 70s. Chance of rain 40 percent. Heat index values up to 105 early in the evening. .FRIDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .FRIDAY NIGHT...Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. .SATURDAY...Sunny. Highs in the mid 90s. Heat index values up to 105 in the afternoon. .SATURDAY NIGHT...Mostly clear in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SUNDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105. $$ MOZ059-062-102100- Gasconade MO-Franklin MO- Including the cities of Washington, Union, and Sullivan 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. A slight chance of showers and thunderstorms this morning. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 107 this afternoon. .TONIGHT...Mostly clear. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 105 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 109. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 109 early in the evening. .WEDNESDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 109. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110. .THURSDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .FRIDAY THROUGH SATURDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs around 90. Chance of rain 20 percent. Heat index values up to 100. $$ MOZ072-073-102100- Crawford MO-Washington MO- 839 AM CDT Mon Aug 10 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 104. .TONIGHT...Mostly clear. Lows in the upper 70s. Southwest winds around 5 mph. Gusts up to 20 mph after midnight. Heat index values up to 103 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 104 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 106. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .THURSDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. .FRIDAY AND FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 100. .SATURDAY...Sunny. A slight chance of showers and thunderstorms in the morning. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. $$ ILZ102-MOZ065-102100- Monroe IL-Jefferson MO- 839 AM CDT Mon Aug 10 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 109 this afternoon. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 112. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 110 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Hot with highs in the upper 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 111. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of thunderstorms. A chance of showers, mainly in the evening. Lows in the mid 70s. Chance of rain 40 percent. Heat index values up to 110 early in the evening. .THURSDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110. .THURSDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .FRIDAY THROUGH SATURDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 105. .SUNDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105. $$