When you're talking about weather in Missouri, it's nearly impossible to have some good news without some bad news also. Internet weather personality Ryan Hall says that Missouri may finally see an end to the current heatwave, but it looks like that will happen by incoming potentially severe storms. Ryan Hall, Y'all via YouTube Ryan Hall, Y'all via YouTube loading...That line through the heart of Missouri is where he expects the cooler air to potentially cause a flare-up of severe thunderstorm activity. Ryan Hall, Y'all via YouTube Ryan Hall, Y'all via YouTube loading... Since this is Missouri weather we're talking about, prepare for everything and anything.