Expires:202605181300;;750008 FPUS53 KDMX 180601 ZFPDMX Zone Forecast Product for Iowa National Weather Service Des Moines IA 1258 AM CDT Mon May 18 2026 IAZ034-181300- Calhoun- Including the cities of Rockwell City, Manson, Lake City, and Pomeroy 1258 AM CDT Mon May 18 2026 .REST OF TONIGHT...Showers and thunderstorms likely. Some thunderstorms may produce damaging winds, large hail, and tornadoes. Lows around 60. Southwest winds 10 to 15 mph. Chance of rain 70 percent. .MONDAY...Mostly cloudy. A chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Northwest winds around 5 mph, becoming south in the afternoon. Chance of rain 50 percent. .MONDAY NIGHT...Showers with thunderstorms likely in the evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible in the evening. Lows in the upper 40s. South winds 10 to 15 mph, becoming northwest 15 to 20 mph after midnight. Chance of rain 90 percent. .TUESDAY...Cloudy in the morning, then becoming partly sunny. Cooler with highs around 60. Northwest winds 15 to 20 mph with gusts up to 30 mph. .TUESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the upper 30s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight. .WEDNESDAY...Mostly sunny. Highs in the lower 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 40s. .THURSDAY...Partly sunny in the morning, then mostly cloudy with a slight chance of showers in the afternoon. Highs in the mid 60s. Chance of rain 20 percent. .THURSDAY NIGHT...Mostly cloudy. A slight chance of showers after midnight. Lows in the mid 40s. Chance of rain 20 percent. .FRIDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 20 percent. .FRIDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Lows around 50. Chance of rain 20 percent. .SATURDAY...Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 50s. Chance of rain 20 percent. .SUNDAY...Mostly sunny. Highs in the mid 80s. $$