FPUS53 KLSX 180617 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 117 AM CDT Mon May 18 2026 ILZ100-101-MOZ061-063-064-181400- 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 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Partly cloudy. Near steady temperature in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Mostly cloudy with thunderstorms likely. A chance of showers in the morning, then showers likely in the afternoon. Highs in the upper 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows around 70. South winds 15 to 20 mph. Chance of rain 60 percent. .TUESDAY...Showers and thunderstorms. Highs in the mid 80s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain near 100 percent. .TUESDAY NIGHT...Showers and thunderstorms likely, mainly in the evening. Cooler with lows in the mid 50s. Northwest winds 5 to 10 mph. Chance of rain 70 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs around 70. Lows in the lower 50s. .THURSDAY...Mostly sunny. Highs in the lower 70s. .THURSDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 50s. Chance of rain 20 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the upper 50s. Chance of rain 40 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 60s. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ049-050-181400- Osage MO-Callaway MO- Including the city of Fulton 117 AM CDT Mon May 18 2026 ...FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THIS EVENING... .REST OF TONIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows around 70. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 30 percent. .MONDAY...Mostly cloudy in the morning, then becoming partly sunny. Showers and thunderstorms likely. Highs in the mid 80s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with showers and thunderstorms likely after midnight. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY...Showers and thunderstorms. Highs in the upper 70s. Temperature falling into the lower 70s in the afternoon. Southwest winds 10 to 15 mph, becoming west in the afternoon. Chance of rain 90 percent. .TUESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Much cooler. Less humid with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs in the upper 60s. Lows in the upper 40s. .THURSDAY...Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Chance of rain 40 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the upper 80s. Chance of rain 20 percent. $$ MOZ042-181400- Audrain MO- Including the city of Mexico 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. South winds around 15 mph with gusts up to 30 mph. Chance of rain 50 percent. .MONDAY...Mostly cloudy. Showers and thunderstorms likely, mainly in the morning. Highs in the lower 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with showers and thunderstorms likely after midnight. Lows in the mid 60s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY...Showers and thunderstorms likely. Highs in the mid 70s. Temperature falling into the lower 70s in the afternoon. Southwest winds around 15 mph, becoming northwest in the afternoon. Gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Much cooler. Less humid with lows around 50. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs in the mid 60s. Lows in the upper 40s. .THURSDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Chance of rain 40 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the mid 80s. Chance of rain 20 percent. $$ MOZ041-047-048-181400- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 117 AM CDT Mon May 18 2026 ...FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THIS EVENING... .REST OF TONIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent. .MONDAY...Mostly cloudy with showers and thunderstorms likely in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy in the evening, then mostly cloudy with showers and thunderstorms likely after midnight. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY...Showers and thunderstorms. Highs in the upper 70s. Temperature falling into the lower 70s in the afternoon. Southwest winds 10 to 15 mph, becoming northwest 5 to 10 mph in the afternoon. Chance of rain 90 percent. .TUESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms in the evening. Much cooler. Less humid with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs in the upper 60s. Lows in the upper 40s. .THURSDAY...Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Chance of rain 50 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the lower 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows around 60. Highs in the upper 80s. Chance of rain 20 percent. $$ ILZ095>097-MOZ018-019-026-027-034>036-181400- 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 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows around 70. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent. .MONDAY...Mostly cloudy. Showers and thunderstorms likely, mainly in the morning. Highs in the lower 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with showers and thunderstorms likely after midnight. Lows in the mid 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY...Showers and thunderstorms likely. Highs in the upper 70s. Temperature falling into the lower 70s in the afternoon. Southwest winds 10 to 15 mph, becoming northwest in the afternoon. Gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Much cooler. Less humid with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Partly cloudy. Highs in the upper 60s. Lows in the upper 40s. .THURSDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 20 percent. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Chance of rain 40 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 50s. Chance of rain 20 percent. .SATURDAY...Partly sunny. Highs in the lower 80s. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows around 60. Highs in the mid 80s. Chance of rain 20 percent. $$ ILZ069-070-074-181400- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Partly cloudy. Near steady temperature in the lower 70s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Partly sunny with a slight chance of showers and thunderstorms in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent. .MONDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows around 70. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent. .TUESDAY...Showers and thunderstorms. Highs in the mid 80s. Southwest winds 15 to 20 mph. Chance of rain near 100 percent. .TUESDAY NIGHT...Showers and thunderstorms. Cooler with lows in the upper 50s. West winds 5 to 10 mph, becoming northwest with gusts up to 20 mph after midnight. Chance of rain near 100 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms. Highs around 70. Lows in the lower 50s. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Highs in the lower 70s. .THURSDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of showers and thunderstorms. Lows in the mid 50s. Chance of rain 20 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows around 60. Chance of rain 40 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SUNDAY...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 30 percent. $$ MOZ074-084-085-099-181400- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Mostly cloudy. Near steady temperature in the lower 70s. South winds 5 to 10 mph with gusts up to 30 mph. .MONDAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Highs in the mid 80s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 40 percent. .MONDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 20 percent. .TUESDAY...Showers and thunderstorms. Highs in the mid 80s. Southwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100 percent. .TUESDAY NIGHT...Showers and thunderstorms. Cooler with lows in the mid 50s. Northwest winds 5 to 10 mph, becoming north with gusts up to 20 mph after midnight. Chance of rain near 100 percent. .WEDNESDAY...Mostly cloudy. A chance of showers and thunderstorms, mainly in the morning. Cooler with highs in the lower 70s. Chance of rain 50 percent. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 50s. Chance of rain 20 percent. .THURSDAY...Partly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 30 percent. .THURSDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 50s. Chance of rain 40 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the upper 50s. Chance of rain 50 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows around 60. Chance of rain 20 percent. .SUNDAY...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 mid 80s. Chance of rain 30 percent. $$ MOZ051-060-181400- Montgomery MO-Warren MO- 117 AM CDT Mon May 18 2026 ...FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THIS EVENING... .REST OF TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. .MONDAY...Thunderstorms likely. Showers likely. Highs in the mid 80s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the mid 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY...Showers and thunderstorms. Highs around 80. Temperature falling into the mid 70s in the afternoon. Southwest winds 10 to 15 mph, becoming west in the afternoon. Chance of rain 90 percent. .TUESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Much cooler. Less humid with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .WEDNESDAY...Partly sunny. Cooler with highs in the upper 60s. .WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s. .THURSDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs around 70. Chance of rain 20 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Chance of rain 40 percent. .SATURDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the mid 80s. Chance of rain 20 percent. $$ MOZ052-181400- Lincoln MO- 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows around 70. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. .MONDAY...Showers and thunderstorms likely. Highs in the mid 80s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .TUESDAY...Showers and thunderstorms. Highs in the lower 80s. Temperature falling into the mid 70s in the afternoon. Southwest winds 10 to 15 mph, becoming west 5 to 10 mph in the afternoon. Chance of rain 90 percent. .TUESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Much cooler. Less humid with lows in the lower 50s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40 percent. .WEDNESDAY...Partly sunny. Cooler with highs in the upper 60s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the upper 40s. Highs around 70. .THURSDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 50s. Chance of rain 30 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the upper 50s. Chance of rain 40 percent. .SATURDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 20 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms. Lows around 60. Highs in the mid 80s. Chance of rain 20 percent. $$ ILZ058-059-098-099-181400- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Partly cloudy. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Showers and thunderstorms likely. Highs in the mid 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the mid 60s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70 percent. .TUESDAY...Showers and thunderstorms. Highs in the lower 80s. Temperature falling into the mid 70s in the afternoon. Southwest winds 15 to 20 mph, becoming west 10 to 15 mph in the afternoon. Chance of rain 90 percent. .TUESDAY NIGHT...Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Cooler. Less humid with lows in the lower 50s. Northwest winds 5 to 10 mph. Chance of rain 50 percent. .WEDNESDAY...Partly sunny. Cooler with highs in the upper 60s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the upper 40s. Highs around 70. .THURSDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 50s. Chance of rain 20 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the mid 50s. Chance of rain 40 percent. .SATURDAY AND SATURDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms. Highs around 80. Lows in the upper 50s. Chance of rain 20 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 20 percent. $$ ILZ060-064-065-181400- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Partly cloudy. Near steady temperature in the lower 70s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Partly sunny with a chance of showers and thunderstorms in the morning, then mostly cloudy with showers and thunderstorms likely in the afternoon. Highs in the lower 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. South winds around 15 mph with gusts up to 25 mph. Chance of rain 50 percent. .TUESDAY...Showers and thunderstorms. Highs in the lower 80s. Southwest winds 15 to 20 mph. Chance of rain 90 percent. .TUESDAY NIGHT...Showers and thunderstorms, mainly in the evening. Cooler with lows in the mid 50s. Northwest winds 5 to 10 mph. Chance of rain 90 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Highs in the upper 60s. Lows in the upper 40s. .THURSDAY...Mostly sunny. Highs around 70. .THURSDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 50s. Chance of rain 20 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the upper 50s. Chance of rain 30 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the upper 70s. Chance of rain 30 percent. .SATURDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows around 60. Chance of rain 20 percent. .SUNDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 20 percent. $$ ILZ079-MOZ075-181400- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Mostly cloudy. Near steady temperature in the lower 70s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY...Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Highs in the upper 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent. .MONDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows around 70. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 30 percent. .TUESDAY...Showers and thunderstorms. Highs in the mid 80s. Southwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100 percent. .TUESDAY NIGHT...Showers and thunderstorms. Cooler with lows in the upper 50s. Northwest winds 5 to 10 mph, becoming north with gusts up to 20 mph after midnight. Chance of rain near 100 percent. .WEDNESDAY THROUGH THURSDAY...Mostly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 70s. Lows in the lower 50s. Chance of rain 20 percent. .THURSDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 50s. Chance of rain 30 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the upper 50s. Chance of rain 50 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SUNDAY...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 30 percent. $$ MOZ059-062-072-073-181400- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 117 AM CDT Mon May 18 2026 ...FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THIS EVENING... .REST OF TONIGHT...Mostly cloudy. Lows around 70. South winds around 10 mph with gusts up to 25 mph. .MONDAY...Mostly cloudy in the morning, then becoming partly sunny. Showers and thunderstorms likely. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent. .MONDAY 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. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent. .TUESDAY...Showers and thunderstorms. Highs in the mid 80s. Temperature falling into the upper 70s in the afternoon. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain near 100 percent. .TUESDAY NIGHT...Showers and thunderstorms likely, mainly in the evening. Much cooler with lows in the mid 50s. North winds around 5 mph. Chance of rain 70 percent. .WEDNESDAY THROUGH THURSDAY...Mostly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 70s. Lows around 50. Chance of rain 20 percent. .THURSDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 50s. Chance of rain 30 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the upper 50s. Chance of rain 50 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows around 60. Chance of rain 20 percent. .SUNDAY...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. $$ ILZ102-MOZ065-181400- Monroe IL-Jefferson MO- 117 AM CDT Mon May 18 2026 .REST OF TONIGHT...Mostly cloudy. Lows in the lower 70s. South winds 5 to 10 mph with gusts up to 25 mph. .MONDAY...Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly sunny with showers and thunderstorms likely in the afternoon. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent. .MONDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent. .TUESDAY...Showers and thunderstorms. Highs in the mid 80s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain near 100 percent. .TUESDAY NIGHT...Showers and thunderstorms. Cooler with lows in the mid 50s. Northwest winds 5 to 10 mph. Chance of rain near 100 percent. .WEDNESDAY THROUGH THURSDAY...Mostly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 70s. Lows around 50. Chance of rain 20 percent. .THURSDAY NIGHT...Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then achance of showers and thunderstorms after midnight. Lows in the mid 50s. Chance of rain 30 percent. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 70s. Lows in the upper 50s. Chance of rain 50 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .SATURDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 20 percent. .SUNDAY...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. $$