FVXX27 KNES 281804 VOLCANIC ASH ADVISORY ISSUED: 2005MAR28/1804Z VAAC: WASHINGTON VOLCANO: USER MESSAGE LOCATION: XX AREA: XX REMARKS: THE AIR FORCE WEATHER AGENCY IS ISSUING THIS MESSAGE ON BEHALF OF THE WASHINGTON VAAC. AFWA AND THE WASHINGTON VAAC ARE CONDUCTING A COORDINATED OPERATIONAL BACKUP TEST FROM 28/1800Z - 29/0200Z. PLEASE BE AWARE THAT AFWA WILL ISSUE ANY NECESSARY VOLCANIC ASH ADVISORIES ON BEHALF OF THE WASHINGTON VAAC DURING THIS TIME FRAME. NNNN