A line of very strong thunderstorms pushed through downtown Zanesville Friday evening between 7:15pm and 7:45pm. Significant damage occurred to Gus Macker tents and other structures. Also damaged was the Zak's building on 3rd Street, where a portion of the roof collapsed, and the rest of the building was ruled unsafe Friday night. It is possible that a funnel cloud or possibly even a very weak tornado caused the damage. A final determination is not yet available.