FVXX20 KWBC 292130 VOLCANIC ASH ADVISORY ISSUED: 2004JUN29/2000Z VAAC: WASHINGTON VAAC VOLCANO: USER MESSAGE LOCATION: XX AREA: XX REMARKS: THE AIR FORCE WEATHER AGENCY IS ISSUING THIS MESSAGE ON BEHALF OF THE WASHINGTON VAAC. THE WASHINGTON VAAC AND AFWA ARE CONDUCTING A SCHEDULED BACK-UP 29/2130Z-30/0400Z. PLEASE BE AWARE THAT AFWA WILL ISSUE ANY NECESSARY VOLCANIC ASH ADVISORIES ON BEHALF OF THE WASHINGTON VAAC UNTIL FURTHER NOTICE. NNNN