Another significant blowdown of trees occurred in the Park on 5 July 2012, as a derecho moved southwest across the Great Tennessee Valley. There were several reports of strong northeasterly winds in excess of 60 mph at several observation sites within the Park. Northeasterly winds are an unusual direction to observe high winds in the southern Appalachian region, which may have contributed to the significance of the tree damage. The most significant tree damage occurred within the Laurel Creek valley and near Cades Cove, where pockets of damage were observed mainly in areas that had a good open view to the northeast direction. On the Tennessee side of the Park, there are no mountain barriers to slow down or block winds from a northeasterly direction. Chilhowee Mountain normally blocks strong westerly winds from reaching the Laurel Creek and Cades Cove valleys, while Hannah Mountain likely slows down or blocks any winds from the southwest (the predominant wind direction in the area). The strong northeasterly winds observed on July 5th likely flowed unimpeded into the northeast-to-southwest oriented valleys of the southwestern portion of the Park (and possibly even accelerated in the valleys due to constricted flow).