sentences:  The strongest tornado of the outbreak was a large, rain-wrapped EF4 wedge that devastated the town of Northwood, North Dakota.This multiple-vortex tornado began to the southwest of town, snapping numerous trees and striking the Northwood Muni-Vince Airport at EF1 strength, where several planes were damaged.A metal storage building and a small airplane hangar were reduced to bare slabs at that location.