FVXX20 KNES 180544 VOLCANIC ASH ADVISORY ISSUED: 2005AUG18/0544Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/689 INFORMATION SOURCE: HONOLULU MWO. GFS MODEL WINDS. PILOT REPORT. GOES-9. USGS. ERUPTION DETAILS: ONGOING ASH EMISSIONS OBS ASH DATE/TIME: 18/0449Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING TO N 5-10 KNOTS. FL100/FL200 MOVING TO NE 5-15 KNOTS. FCST ASH CLOUD +6H: 18/1100Z FCST ASH CLOUD +12H: 18/1700Z FCST ASH CLOUD +18H: 18/2300Z REMARKS: ASH CAN NOT BE SEEN IN SATELLITE IMAGERY DUE TO CLOUDS. A PILOT REPORTED ASH OVER THE VOLCANO AT 0412 UTC TO FL200 WITH LITTLE MOVEMENT. A BRIEF INCREASE IN SEISMIC ACTIVITY OCCURED AT 0521 UTC. ... NEXT ADVISORY: WILL BE ISSUED BY 2005AUG18/1145Z NNNN