Weather Service survey teams find EF-1 damage

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JOHNSON COUNTY, Iowa (KCRG) - Storm damage survey teams from the National Weather Service have found EF-1 level damage from Friday night's storms in Washington and Johnson Counties.

A tornado in rural Johnson County, looking north from Kalona in northern Washington County (Matt Holub)

The survey team found damage consistent with tornado winds of 110 mph, which is at the top end of the scale for EF-1 damage. The EF-scale goes from zero to five.

At around 6:37 p.m., the tornado formed 11 miles west-southwest of the Iowa City Airport and continued to just east of the airport. It dissipated at 7:04 p.m. The total path length was 11.5 miles, with a maximum width of 75 yards.

Officials found damage to rooftops, destroyed outbuildings, snapped and uprooted trees, and trailers that were flipped and destroyed.

Further refining of the survey results is possible through the day.