HULL, Iowa (AP) – Many in northwest Iowa spent Monday cleaning up after a severe thunderstorm hit Sioux County.  The Sioux County Sheriff’s Office says trees, branches and power lines were knocked down during the storm as it passed over Hull, Hawarden and Boyden on Sunday night.  The Sioux City Journal reports several homes were hit by downed trees but that no injuries were reported. Officials say wind gusts up to 70 miles per hour were also reported and some residents lost power for about three hours.