Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
735 FPUS53 KLSX 091829 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 128 PM CDT Sun Aug 9 2026 ILZ100-101-MOZ061-063-064-100200- 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 Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Mostly sunny. Near steady temperature around 90. South winds 10 to 15 mph. Heat index values up to 103. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 10 to 15 mph. Heat index values up to 101 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 111 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 110 early in the evening. .TUESDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 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. A chance of showers with a slight chance of thunderstorms in the morning. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .THURSDAY...A chance of thunderstorms. Showers likely, mainly in the morning. Highs in the upper 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 70s. Chance of rain 70 percent. .FRIDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning. Highs in the mid 80s. Chance of rain 50 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 40 percent. $$ MOZ049-050-100200- Osage MO-Callaway MO- Including the city of Fulton 128 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .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 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...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 25 mph. Heat index values up to 107 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 106 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 in the afternoon. .TUESDAY NIGHT...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. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105 in the afternoon. .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 105 early in the evening. .THURSDAY AND THURSDAY NIGHT...Mostly cloudy. Showers likely with a chance of thunderstorms. Highs in the upper 80s. 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...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .SATURDAY...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. $$ MOZ042-100200- Audrain MO- Including the city of Mexico 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Mostly sunny. Highs around 90. South winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 101. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds around 10 mph with gusts up to 25 mph. Heat index values up to 100 early in the evening. .MONDAY...Mostly sunny. Humid with highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 30 mph. Heat index values up to 103 in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows in the mid 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 103 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the lower 90s. Southwest winds around 10 mph with gusts up to 20 mph. Heat index values up to 104. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny. A chance of showers with a slight chance of thunderstorms in the morning. Highs around 90. Chance of rain 30 percent. Heat index values up to 100 in the afternoon. .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...Becoming mostly cloudy in the afternoon. A chance of thunderstorms. Showers likely, mainly in the morning. Highs in the lower 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 50 percent. .SATURDAY...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the morning, then partly sunny in the afternoon. Highs in the mid 80s. Chance of rain 50 percent. $$ MOZ041-047-048-100200- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 128 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Sunny. Highs in the mid 90s. South winds 10 to 15 mph with gusts up to 25 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 100 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 108 in the afternoon. .MONDAY NIGHT...Partly cloudy in the evening, then becoming mostly 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 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. 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 in the afternoon. .WEDNESDAY 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. .THURSDAY...Partly sunny with a chance of thunderstorms. Showers likely, mainly in the morning. Highs in the upper 80s. Chance of rain 60 percent. Heat index values up to 100 in the afternoon. .THURSDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 70s. Chance of rain 70 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. Lows in the lower 70s. Chance of rain 50 percent. .SATURDAY...Partly sunny. A chance of showers with a slight chance of thunderstorms in the morning. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 100 in the afternoon. $$ ILZ095>097-MOZ018-019-026-027-034>036-100200- 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 Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Mostly sunny. Highs in the lower 90s. South winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 101. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A slight chance of showers. Lows in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .MONDAY...Partly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 20 percent. 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 with gusts up to 20 mph. Heat index values up to 107 early in the evening. .TUESDAY...Mostly sunny. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 107 in the afternoon. .TUESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 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 in the morning. Highs around 90. Chance of rain 40 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...Showers likely with a chance of thunderstorms. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY...Mostly cloudy. A chance of showers and thunderstorms, mainly in the morning. Highs in the lower 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 60 percent. .SATURDAY...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 lower 80s. Chance of rain 50 percent. $$ ILZ069-074-100200- Clinton IL-Washington IL- 128 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Mostly sunny. Near steady temperature in the upper 80s. South winds around 10 mph with gusts up to 20 mph. .TONIGHT...Partly cloudy in the evening, then becoming mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 10 to 15 mph. Heat index values up to 112 in the afternoon. .MONDAY NIGHT...Mostly clear. Humid with lows in the upper 70s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 109 early in the evening. .TUESDAY...Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 111. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. Heat index values up to 110 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the mid 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 100. .THURSDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows around 70. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. Lows in the lower 70s. Chance of rain 40 percent. $$ ILZ070-100200- Marion IL- Including the cities of Centralia and Salem 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Mostly sunny. Near steady temperature in the upper 80s. South winds 5 to 10 mph with gusts up to 20 mph. .TONIGHT...Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY...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 107. .MONDAY NIGHT...Partly cloudy. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 25 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. Heat index values up to 107. .TUESDAY NIGHT...Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT...Partly cloudy with 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. .THURSDAY...A chance of thunderstorms. Showers likely, mainly in the morning. Highs in the mid 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY...Mostly cloudy. A chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 50 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows around 70. Highs in the mid 80s. Chance of rain 40 percent. $$ MOZ074-084-085-099-100200- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. South winds 5 to 10 mph with gusts up to 20 mph. .TONIGHT...Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106 in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 103 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. .TUESDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 100 early in the evening. .WEDNESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 100. .THURSDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .FRIDAY...Partly sunny. A slight chance of showers and thunderstorms in the morning. Highs around 90. Chance of rain 20 percent. Heat index values up to 100. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. $$ MOZ051-060-100200- Montgomery MO-Warren MO- 128 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Mostly sunny. Highs in the lower 90s. South winds 5 to 10 mph with gusts up to 20 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...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 108 in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows in the mid 70s. Southwest winds 5 to 10 mph. Heat index values up to 109 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 in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 70s. 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. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 50 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 60 percent. .FRIDAY...Mostly cloudy with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 80s. Chance of rain 40 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the upper 60s. Highs in the upper 80s. Chance of rain 50 percent. $$ MOZ052-100200- Lincoln MO- 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Mostly sunny. Highs in the lower 90s. South winds around 10 mph with gusts up to 20 mph. Heat index values up to 104. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. 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...Mostly sunny. Humid with highs in the mid 90s. Southwest winds 10 to 15 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 109 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...Partly cloudy. Lows in the upper 70s. 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. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105 in the afternoon. .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 105 early in the evening. .THURSDAY...A chance of thunderstorms. Showers likely, mainly in the morning. Highs in the mid 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning. Highs in the mid 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers. Lows around 70. Chance of rain 50 percent. .SATURDAY...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. $$ ILZ058-059-098-099-100200- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Partly 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 with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. 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 107 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...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy with 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...Becoming mostly cloudy in the afternoon. A chance of thunderstorms. Showers likely, mainly in the morning. Highs in the mid 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Showers likely with a chance of thunderstorms. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY...Mostly cloudy with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the lower 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 50 percent. .SATURDAY...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. $$ ILZ060-064-065-100200- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Partly sunny. Near steady temperature in the upper 80s. South winds around 10 mph with gusts up to 20 mph. .TONIGHT...Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .MONDAY...Mostly sunny. A slight chance of showers in the morning. Humid with highs in the lower 90s. Southwest winds 10 to 15 mph. Chance of rain 20 percent. Heat index values up to 108 in the afternoon. .MONDAY NIGHT...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. .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 slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs around 90. Chance of rain 30 percent. Heat index values up to 105 in the afternoon. .WEDNESDAY NIGHT...Partly cloudy with 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...A chance of thunderstorms. Showers likely, mainly in the morning. Highs in the mid 80s. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 70 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Lows in the upper 60s. Chance of rain 50 percent. $$ ILZ079-100200- Randolph IL- Including the cities of Chester and Sparta 128 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. South winds around 10 mph with gusts up to 20 mph. .TONIGHT...Mostly clear. Humid with 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. South winds 5 to 10 mph. Heat index values up to 111 in the afternoon. .MONDAY NIGHT...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 110 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 mid 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 105. .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 40 percent. Heat index values up to 105 early in the evening. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 40 percent. Heat index values up to 105 in the afternoon. .THURSDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .FRIDAY...Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 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...Partly sunny. A chance of showers in the morning, then a slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100 in the afternoon. $$ MOZ075-100200- Sainte Genevieve MO- 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. South winds around 10 mph with gusts up to 20 mph. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. .MONDAY...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 109. .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 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 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. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .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 30 percent. Heat index values up to 105 early in the evening. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 40 percent. Heat index values up to 105 in the afternoon. .THURSDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .FRIDAY...Mostly cloudy with a slight chance of showers and thunderstorms in the morning, then partly sunny in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. .FRIDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Chance of rain 30 percent. .SATURDAY...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. $$ MOZ059-062-100200- Gasconade MO-Franklin MO- Including the cities of Washington, Union, and Sullivan 128 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Sunny. Near steady temperature in the lower 90s. South winds 5 to 10 mph with gusts up to 20 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 100 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 108 in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows in the mid 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 108 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 107. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 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. A chance of showers and thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 30 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 upper 80s. Lows around 70. Chance of rain 50 percent. Heat index values up to 100. .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 AND SATURDAY...Partly cloudy. A chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Highs in the upper 80s. Chance of rain 40 percent. $$ MOZ072-073-100200- Crawford MO-Washington MO- 128 PM CDT Sun Aug 9 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Sunny. Near steady temperature around 90. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 100. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 102 early in the evening. .TUESDAY...Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Heat index values up to 100 early in the evening. .WEDNESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 105. .WEDNESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the mid 70s. Chance of rain 30 percent. Heat index values up to 100 early in the evening. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 40 percent. Heat index values up to 100. .THURSDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .FRIDAY...Mostly cloudy in the morning, then becoming partly sunny. A slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms. A chance of showers, mainly in the evening. Lows in the lower 70s. Chance of rain 30 percent. .SATURDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs around 90. Chance of rain 20 percent. $$ ILZ102-MOZ065-100200- Monroe IL-Jefferson MO- 128 PM CDT Sun Aug 9 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM CDT WEDNESDAY... .THIS AFTERNOON...Sunny. Near steady temperature around 90. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 102. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. .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 111. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 110 early in the evening. .TUESDAY...Mostly 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. 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 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 40 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 upper 80s. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105. .FRIDAY...Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. .FRIDAY NIGHT...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Chance of rain 40 percent. .SATURDAY...Partly sunny. A chance of showers in the morning, then a slight chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 40 percent. Heat index values up to 100. $$