UW-Wisconsin State Climatology Office
May 4 saw significant dust squalls across the Midwest. Indiana was hit with dust blowing from Illinois fields. Fences and utility lines came down in north-central and central Illinois. Eastern Iowa saw pseudo-tornadoes made of topsoil swirling across roads. Several highways were closed. Dust-storm warnings were issued across the area. Folks caught in the strong winds posted numerous photos on social media.
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