FVXX20 KNES 071311 VOLCANIC ASH ADVISORY ISSUED: 2005AUG07/1310Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/643 INFORMATION SOURCE: GFS MODEL WINDS. GOES-9. ERUPTION DETAILS: ONGOING ASH EMISSIONS OBS ASH DATE/TIME: 07/1202Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING TO W 10-15 KNOTS. FL120/FL180 MOVING TO NW 5-10 KNOTS. FCST ASH CLOUD +6H: 07/1800Z FCST ASH CLOUD +12H: 08/0000Z FCST ASH CLOUD +18H: 08/0600Z REMARKS: SINCE ABOUT 08Z THE PRESENCE OF WEATHER CLOUDS HAS PREVENTED SATELLITE DETECTION OF ASH. PRIOR TO THAT TIME A 20 NM WIDE ASH PLUME TO FL180 WAS SEEN EXTENDING TOWARD THE WEST OR WEST NORTHWEST. IN THE NEXT 18 HOURS ANY PLUME BELOW FL180 IS EXPECTED TO EXTEND TO THE WEST NORTHWEST. ... NEXT ADVISORY: WILL BE ISSUED BY 2005AUG07/1915Z NNNN