Developing thunderstorms in western Iowa later this afternoon are expected to quickly grow into supercells capable of producing strong tornadoes. This threat should last for at least 2-4 hours.
Along with the tornado threat you see to the right, western Iowa also faces the greatest threat for hail between 1” and 3” in diameter. Overall it could be an extremely dangerous day across western Iowa as this storm ramps up. Any area that falls in the path of a violent tornado or extremely large hail is in serious trouble.
But as the storms progress into the nighttime hours, the threat shifts to straight line winds. This could lead to even more widespread damage that what is cause by tornadoes and hail in the first 4 hours.
These storms could produce countless storms capable of producing winds in excess of 60mph and as high as 90mph. This will also prolong the threat for severe weather through most of the overnight hours until the storms pass to our east.
Overall this looks to be the most active severe weather day Iowa has seen yet this year. Chasers will fan out across Iowa and Minnesota today as storms develop and begin trekking to the east across the state. There is also a risk tomorrow we will focus on later this afternoon. For now stay with us for the very latest and we’ll launch our live chat this afternoon as storms begin to develop.