A warm up expected Wednesday may also bring strong storms to central Iowa. According to the National Weather Service, daytime highs will likely top 90 degrees, with heat index values approaching the mid-90s by the afternoon. Chances for thunderstorms will increase by the evening, with the severe risk determined as marginal. However, multiple rounds of precipitation may produce heavy rain in some locations, especially along and north of Interstate 80. Stay tuned to KNIA/KRLS for updates.