From the Joint Base Myer-Henderson Hall public affairs office:
Due to impending inclement weather tonight’s Twilight Tattoo will no longer take place on Summerall Field. It is now scheduled to be inside Conmy Hall on Joint Base Myer-Henderson Hall. Unfortunately Conmy Hall only seats approximately 1,000 patrons and admission will be granted on a first-requested, first-seated basis. The U.S. Army Military District of Washington Public Affairs Office will contact groups that have requested admission to inform them of their status. We apologize for the inconvenience.
For more information call 202-685-2888.