Flag Day and Flag EtiquetteTopper Shutt, WUSA6:11 PM. EST June 13, 2016 Flag Day storm 1989 (Photo: WUSA) Tuesday is Flag Day. I will always remember Flag Day for that monster thunderstorm back in 1989. The skies darkened around 3:30 that afternoon. A downburst in Chevy Chase and northwest DC downed trees and power lines. Some homes in Northwest and Chevy Chase were without power for three weeks. As strong as those...