Yesterday we talked about a minimal threat for strong storms across much of Iowa. That remains true, but extreme eastern Iowa is now under a formal slight risk for severe weather. Why? Not much has changed in our thinking, but the Storm Prediction Center has slightly increased confidence that some isolated severe weather could develop across eastern Iowa and portions of Illinois.
Surface-based storms are expected to fire later this afternoon across portions of eastern Iowa and could overspread some areas with brief downpours, strong wind gusts and large hail. The tornado risk, at this time, appears very remote.
Not all parameters for severe weather look particularly strong today. Although Iowa will see an unstable air mass, vertical shear is not particularly strong, keeping today’s threat relatively conditional. Even so, this is a threat that needs to be taken seriously. It has been a while since anyone in the state has seen an organized severe weather threat and, with weekend plans, any threat, big or small should be taken seriously.
We’ll continue to watch how conditions develop this afternoon and bring you updates throughout the day and night here on iowachase.com and on our Facebook page.