The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.

IEM Daily Feature

Busy Two Days

Posted: 12 Jun 2026 05:30 AM, Views: 749
Thursday picked up where Wednesday left off with two rounds of severe weather impacting Iowa. The first round plowed through the state early Thursday morning bringing strong winds with the storm and even strong winds after the storm passed associated with what is known as a "wake low", more on that with a future IEM feature. The second round developed over southeastern Iowa and pushed off into Illinois by early evening with the most significant severe weather happening outside of the state. The featured screenshot is from the IEM Local Storm Report App showing the combination of storm reports and issued storm warnings by the NWS over Wednesday and Thursday. A new tool was recently added to this app allowing the bean counting of both LSRs and warnings over a rectangle of your choice. Individual warning and report types are counted within this box and shows a large number of events over the past two days. One important item to denote is that LSRs are preliminary, unfiltered, and sometimes contain duplicated reports. So while the LSR total of Tornadoes is shown at 13, this is not an official total number of observed tornadoes over this period!
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