Lacona, Iowa tornado upgraded to EF-3

JOHNSTON, Iowa -- The National Weather Service has upgraded the tornado that hit Lacona, in Warren County, yesterday (Tue) to an EF-3.

"Looking at the photographs of the damage, and the structures, and kind of piecing everything together, we determined that the winds speeds needed to go up higher. In this case we estimated the peak winds around 150 miles-per-hour."

In Johnston, Weather Service Meteorologist Mike Fowle says a sturdy metal warehouse with steel construction was nearly demolished by the tornado.

He says it's not unusual to upgrade a tornado's strength after a closer look at the damage done by the storm.

The Weather Service says tornadoes in Marion County near Tracy and in Madison County near Badger Creek State Park were both EF-1s.

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