Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
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159 FPUS53 KLSX 211828 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 128 PM CDT Tue Jul 21 2026 ILZ100-101-MOZ061-063-064-220200- Madison IL-Saint Clair IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO- Including the cities of Alton, Edwardsville, Belleville, Cahokia, Saint Charles, and Saint Louis 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Mostly sunny. Near steady temperature around 90. Northwest winds 10 to 15 mph. Heat index values up to 100. .TONIGHT...Mostly clear. Cooler with lows in the upper 60s. North winds 10 to 15 mph. .WEDNESDAY...Mostly sunny. Cooler with highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing. Lows in the lower 60s. Northeast winds 5 to 10 mph. .THURSDAY...Sunny. Highs in the lower 80s. Northeast winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Hot. Lows around 70. Highs in the mid 90s. Heat index values up to 110. .SUNDAY NIGHT...Mostly clear. Lows in the upper 70s. Heat index values up to 110 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110. $$ MOZ049-050-220200- Osage MO-Callaway MO- Including the city of Fulton 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Sunny. Near steady temperature around 90. Northwest winds 10 to 15 mph. .TONIGHT...Mostly clear. Cooler with lows in the mid 60s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight. .WEDNESDAY...Sunny. Highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the lower 60s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs around 80. East winds around 5 mph. .THURSDAY NIGHT...Mostly cloudy. A chance of showers after midnight. Lows in the lower 60s. Chance of rain 40 percent. .FRIDAY...Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 70 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Warmer with highs in the upper 80s. .SATURDAY NIGHT...Clear. Lows around 70. .SUNDAY THROUGH MONDAY...Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105. $$ MOZ042-220200- Audrain MO- Including the city of Mexico 128 PM CDT Tue Jul 21 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. Northwest winds around 15 mph. .TONIGHT...Clear, cooler with lows in the lower 60s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight. .WEDNESDAY...Sunny. Highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows around 60. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs in the upper 70s. East winds around 5 mph. .THURSDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the lower 60s. Chance of rain 40 percent. .FRIDAY...Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 70 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Warmer with highs in the mid 80s. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 100. .SUNDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. Heat index values up to 100 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 105. $$ MOZ041-047-048-220200- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. Northwest winds 10 to 15 mph. .TONIGHT...Mostly clear. Cooler with lows in the mid 60s. North winds 5 to 10 mph. .WEDNESDAY...Sunny. Highs in the mid 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the mid 60s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs in the lower 80s. East winds around 5 mph. .THURSDAY NIGHT...Mostly cloudy. A chance of showers after midnight. Lows in the mid 60s. Chance of rain 40 percent. .FRIDAY...A chance of thunderstorms. Showers likely, mainly in the morning. Highs in the upper 70s. Chance of rain 70 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Warmer with highs around 90. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Hot. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 105. .SUNDAY NIGHT AND MONDAY...Mostly clear. Hot. Lows in the upper 70s. Highs in the upper 90s. Heat index values up to 110. $$ ILZ095>097-MOZ018-019-026-027-034>036-220200- Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO- Including the cities of Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green 128 PM CDT Tue Jul 21 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the mid 80s. Northwest winds around 15 mph with gusts up to 25 mph. .TONIGHT...Clear, cooler with lows in the lower 60s. North winds 10 to 15 mph with gusts up to 25 mph, diminishing to around 5 mph after midnight. .WEDNESDAY...Sunny. Highs around 80. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 50s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs around 80. East winds around 5 mph. .THURSDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the lower 60s. Chance of rain 40 percent. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the upper 70s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Warmer with highs in the upper 80s. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows around 70. Highs in the mid 90s. Heat index values up to 105. .SUNDAY NIGHT AND MONDAY...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105. $$ ILZ069-074-220200- Clinton IL-Washington IL- 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Mostly sunny. Near steady temperature around 90. Northwest winds 10 to 15 mph. Heat index values up to 102. .TONIGHT...Mostly clear. Cooler with lows in the upper 60s. North winds 5 to 10 mph. .WEDNESDAY...Mostly sunny. Cooler with highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing. Lows in the lower 60s. Northeast winds 5 to 10 mph. .THURSDAY...Sunny. Highs in the upper 70s. Northeast winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms. Highs in the upper 70s. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 110. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110. $$ ILZ070-220200- Marion IL- Including the cities of Centralia and Salem 128 PM CDT Tue Jul 21 2026 .THIS AFTERNOON...Mostly sunny. Near steady temperature around 90. Northwest winds 10 to 15 mph. Heat index values up to 100. .TONIGHT...Mostly clear. Lows in the upper 60s. Northwest winds 5 to 10 mph. .WEDNESDAY...Mostly sunny. Cooler with highs in the upper 70s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing. Lows around 60. Northeast winds 5 to 10 mph. .THURSDAY...Sunny. Highs in the upper 70s. Northeast winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. .FRIDAY...Partly sunny in the morning, then mostly cloudy with a slight chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 20 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 105. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 105. $$ MOZ074-084-085-099-220200- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Sunny with a chance of showers and thunderstorms. Hot. Near steady temperature in the lower 90s. Northwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 30 percent. Heat index values up to 107. .TONIGHT...Mostly clear. Lows in the mid 60s. North winds 5 to 10 mph. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph. .THURSDAY...Sunny. Highs around 80. Northeast winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the lower 60s. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms. Highs in the upper 70s. Lows in the mid 60s. Chance of rain 50 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 105. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110 in the afternoon. $$ MOZ051-060-220200- Montgomery MO-Warren MO- 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. Northwest winds 10 to 15 mph. .TONIGHT...Mostly clear. Cooler with lows in the lower 60s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows around 60. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs around 80. East winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. A slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Showers likely with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 70 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Warmer with highs in the upper 80s. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 105. .SUNDAY NIGHT AND MONDAY...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 110. $$ MOZ052-220200- Lincoln MO- 128 PM CDT Tue Jul 21 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. Northwest winds 10 to 15 mph. .TONIGHT...Mostly clear. Cooler with lows in the mid 60s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight. .WEDNESDAY...Sunny. Highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows around 60. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs in the lower 80s. East winds around 5 mph. .THURSDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Warmer with highs in the upper 80s. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Hot. Lows around 70. Highs in the mid 90s. Heat index values up to 110. .SUNDAY NIGHT AND MONDAY...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 110. $$ ILZ058-059-098-099-220200- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 128 PM CDT Tue Jul 21 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. Northwest winds 10 to 15 mph with gusts up to 25 mph. .TONIGHT...Mostly clear. Cooler with lows in the mid 60s. North winds 10 to 15 mph. .WEDNESDAY...Mostly sunny. Cooler with highs around 80. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the upper 50s. Northeast winds 5 to 10 mph. .THURSDAY...Sunny. Highs around 80. East winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 50s. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Highs in the upper 80s. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 105. .SUNDAY NIGHT AND MONDAY...Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105. $$ ILZ060-064-065-220200- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 128 PM CDT Tue Jul 21 2026 .THIS AFTERNOON...Sunny. Near steady temperature in the upper 80s. Northwest winds 10 to 15 mph with gusts up to 25 mph. .TONIGHT...Mostly clear. Cooler with lows in the mid 60s. Northwest winds 5 to 10 mph. .WEDNESDAY...Mostly sunny. Cooler with highs in the upper 70s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the upper 50s. Northeast winds 5 to 10 mph. .THURSDAY...Sunny. Highs in the upper 70s. Northeast winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 50s. .FRIDAY...Partly sunny. A slight chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 20 percent. .FRIDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers. A slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. Highs in the mid 80s. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 105. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 110. $$ ILZ079-MOZ075-220200- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Sunny with a slight chance of showers and thunderstorms. Near steady temperature in the lower 90s. Northwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 104. .TONIGHT...Mostly clear. Cooler with lows in the upper 60s. North winds 5 to 10 mph. .WEDNESDAY...Mostly sunny. Cooler with highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs around 80. Northeast winds around 5 mph. .THURSDAY NIGHT...Partly cloudy. Lows around 60. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 110. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 110 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110 in the afternoon. $$ MOZ059-062-072-073-220200- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Sunny. Near steady temperature in the lower 90s. Northwest winds 10 to 15 mph. Heat index values up to 100. .TONIGHT...Mostly clear. Cooler with lows in the mid 60s. North winds 5 to 10 mph. .WEDNESDAY...Sunny, cooler with highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the lower 60s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs around 80. East winds around 5 mph. .THURSDAY NIGHT...Mostly cloudy in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent. .FRIDAY...Partly sunny with a chance of showers in the morning, then mostly cloudy with showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 60 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 20 percent. .SATURDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Warmer with highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Hot. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 105. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110. $$ ILZ102-MOZ065-220200- Monroe IL-Jefferson MO- 128 PM CDT Tue Jul 21 2026 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... .THIS AFTERNOON...Sunny. Near steady temperature in the lower 90s. Northwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 101. .TONIGHT...Mostly clear. Cooler with lows in the mid 60s. North winds 5 to 10 mph. .WEDNESDAY...Mostly sunny. Cooler with highs in the lower 80s. North winds 5 to 10 mph. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing. Lows in the lower 60s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs around 80. Northeast winds around 5 mph. .THURSDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 60s. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SATURDAY...Partly sunny. A slight chance of showers in the morning. Warmer with highs in the upper 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Hot. Lows in the upper 60s. Highs in the mid 90s. Heat index values up to 110. .SUNDAY NIGHT...Mostly clear. Lows in the mid 70s. Heat index values up to 110 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110. $$