Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
520 FPUS53 KLSX 091303 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 803 AM CDT Sun Aug 9 2026 ILZ100-101-MOZ061-063-064-092100- 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 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Highs in the mid 90s. South winds 10 to 15 mph. Heat index values up to 106 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 104 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 110 in the afternoon. .MONDAY NIGHT...Partly cloudy. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 109 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110. .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 105 early in the evening. .THURSDAY...Showers and thunderstorms likely in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows around 70. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 80s. Lows around 70. Chance of rain 50 percent. $$ MOZ049-050-092100- Osage MO-Callaway MO- Including the city of Fulton 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Hot with highs in the mid 90s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106 this afternoon. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 104 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 108 in the afternoon. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 105 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106. .TUESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 30 percent. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy. Showers and thunderstorms likely. Highs in the mid 80s. Lows in the upper 60s. Chance of rain 60 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 80s. Lows in the upper 60s. Chance of rain 50 percent. $$ MOZ042-092100- Audrain MO- Including the city of Mexico 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. A slight chance of showers this morning. Highs in the lower 90s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. Heat index values up to 105 this afternoon. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds around 10 mph with gusts up to 20 mph. Heat index values up to 103 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds around 10 mph with gusts up to 20 mph. Heat index values up to 108 in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 105 early in the evening. .TUESDAY...Mostly sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 103. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A chance of showers and thunderstorms. Lows in the mid 70s. Highs in the upper 80s. Chance of rain 40 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with showers and thunderstorms likely after midnight. Lows around 70. Chance of rain 60 percent. Heat index values up to 100 early in the evening. .THURSDAY AND THURSDAY NIGHT...Showers and thunderstorms likely. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs around 80. Lows in the upper 60s. Chance of rain 50 percent. $$ MOZ041-047-048-092100- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Hot with highs in the mid 90s. South winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 107 this afternoon. .TONIGHT...Mostly clear. Lows in the upper 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 109 in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 107 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 108 in the afternoon. .TUESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the upper 70s. Chance of rain 40 percent. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 105. .THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the lower 70s. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 80s. Lows around 70. Chance of rain 50 percent. $$ ILZ095>097-MOZ018-019-026-027-034>036-092100- 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 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly cloudy with a slight chance of showers and thunderstorms this morning, then mostly sunny this afternoon. Highs in the mid 90s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. Heat index values up to 108 this afternoon. .TONIGHT...Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Humid with lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 106 early in the evening. .MONDAY...Partly sunny. Humid 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. .MONDAY NIGHT...Partly cloudy. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 107 early in the evening. .TUESDAY...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 107 in the afternoon. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A chance of showers and thunderstorms. Lows in the mid 70s. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with showers and thunderstorms likely after midnight. Lows around 70. Chance of rain 60 percent. Heat index values up to 100 early in the evening. .THURSDAY AND THURSDAY NIGHT...Showers and thunderstorms likely. Highs in the lower 80s. Lows in the mid 60s. Chance of rain 70 percent. .FRIDAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Highs in the upper 70s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the upper 60s. Chance of rain 60 percent. .SATURDAY...Partly sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the upper 70s. Chance of rain 50 percent. $$ ILZ069-074-092100- Clinton IL-Washington IL- 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. Heat index values up to 105. .TONIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 102 early in the evening. .MONDAY...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109. .MONDAY NIGHT...Mostly clear. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 106 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 110. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 105. .THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows around 70. Chance of rain 60 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 80s. Lows in the upper 60s. Chance of rain 50 percent. $$ ILZ070-092100- Marion IL- Including the cities of Centralia and Salem 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 102. .TONIGHT...Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph. .MONDAY...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 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 106. .TUESDAY NIGHT...Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Showers and thunderstorms likely in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 60 percent. Heat index values up to 100 early in the evening. .THURSDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the upper 60s. Chance of rain 60 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 50 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Highs in the mid 80s. Chance of rain 40 percent. $$ MOZ074-084-085-099-092100- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. Heat index values up to 101 this afternoon. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 100 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph with gusts up to 20 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. .THURSDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 50 percent. Heat index values up to 100. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 40 percent. .SATURDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ051-060-092100- Montgomery MO-Warren MO- 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Highs in the mid 90s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 107 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 104 early in the evening. .MONDAY...Mostly 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 110 in the afternoon. .MONDAY NIGHT...Partly cloudy. Humid with lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 108 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 108 in the afternoon. .TUESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 40 percent. Heat index values up to 110 early in the evening. .WEDNESDAY...Mostly 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 105 in the afternoon. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows around 70. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .THURSDAY...Showers and thunderstorms likely in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 50 percent. $$ MOZ052-092100- Lincoln MO- 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 107 this afternoon. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 105 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 111 in the afternoon. .MONDAY NIGHT...Partly cloudy. Humid with lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 110 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 108. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A chance of showers and thunderstorms. Lows in the upper 70s. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 110. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .THURSDAY...Showers and thunderstorms likely in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 50 percent. $$ ILZ058-059-098-099-092100- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Highs in the lower 90s. South winds 10 to 15 mph. Heat index values up to 106 this afternoon. .TONIGHT...Mostly clear in the evening, then partly cloudy with a chance of showers and thunderstorms after midnight. Lows in the mid 70s. South winds 10 to 15 mph. Chance of rain 30 percent. Heat index values up to 103 early in the evening. .MONDAY...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107 in the afternoon. .MONDAY 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 106 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A chance of showers and thunderstorms. Lows in the mid 70s. Highs around 90. Chance of rain 50 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows around 70. Chance of rain 50 percent. Heat index values up to 100 early in the evening. .THURSDAY...Thunderstorms likely. Showers likely, mainly in the morning. Highs in the lower 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Showers and thunderstorms likely. Lows in the mid 60s. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. Lows in the mid 60s. Chance of rain 50 percent. $$ ILZ060-064-065-092100- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Mostly sunny. Highs in the lower 90s. South winds 10 to 15 mph. Heat index values up to 102. .TONIGHT...Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. South winds 5 to 10 mph. Chance of rain 20 percent. .MONDAY...Mostly sunny. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 107 in the afternoon. .MONDAY NIGHT...Partly cloudy. Humid with lows in the mid 70s. Southwest winds 5 to 10 mph. Heat index values up to 104 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 107. .TUESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .WEDNESDAY...Partly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 50 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT...Showers and thunderstorms likely in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 60 percent. Heat index values up to 100 early in the evening. .THURSDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .THURSDAY NIGHT...Showers and thunderstorms likely. Lows in the mid 60s. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. Lows in the mid 60s. Chance of rain 50 percent. $$ ILZ079-092100- Randolph IL- Including the cities of Chester and Sparta 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. Heat index values up to 105 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 102 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 104 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 109. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .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 105 early in the evening. .THURSDAY THROUGH FRIDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. Lows around 70. Chance of rain 50 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Highs in the upper 80s. Chance of rain 40 percent. $$ MOZ075-092100- Sainte Genevieve MO- 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. Heat index values up to 104 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 102 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 104 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 108. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 105 early in the evening. .THURSDAY THROUGH FRIDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. Lows around 70. Chance of rain 50 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 40 percent. $$ MOZ059-062-092100- Gasconade MO-Franklin MO- Including the cities of Washington, Union, and Sullivan 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 107 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. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 108. .MONDAY 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. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 107. .TUESDAY NIGHT AND WEDNESDAY...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. .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 105 early in the evening. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy. Showers and thunderstorms likely. Highs in the upper 80s. Lows in the upper 60s. Chance of rain 60 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 80s. Lows in the upper 60s. Chance of rain 50 percent. $$ MOZ072-073-092100- Crawford MO-Washington MO- 803 AM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Sunny. Highs in the lower 90s. South winds 5 to 10 mph. Heat index values up to 103. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 101 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .MONDAY NIGHT...Mostly clear. Lows in the upper 70s. South winds around 5 mph with gusts up to 20 mph. Heat index values up to 101 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. Hot. Lows in the upper 70s. Highs in the mid 90s. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. .THURSDAY THROUGH FRIDAY...Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. Lows around 70. Chance of rain 50 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 40 percent. $$ ILZ102-MOZ065-092100- Monroe IL-Jefferson MO- 803 AM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT FROM NOON TODAY TO 8 PM CDT WEDNESDAY... .TODAY...Sunny. Highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 106 this afternoon. .TONIGHT...Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 103 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 110. .MONDAY 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 107 early in the evening. .TUESDAY...Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 110. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 70s. 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 mid 90s. Chance of rain 20 percent. Heat index values up to 110. .WEDNESDAY NIGHT THROUGH SATURDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 105. $$