FVXX20 KNES 311029 VOLCANIC ASH ADVISORY ISSUED: 2005MAR31/1028Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/099 INFORMATION SOURCE: RADIOSONDE. GOES-9. ERUPTION DETAILS: CONTINUOUS LOW LEVEL PLUME OBS ASH DATE/TIME: 31/1013Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING TO W 15-20 KNOTS. FCST ASH CLOUD +6H: 31/1613Z SFC/FL100 15NM WIDE LINE BETWEEN N1640E14427 - N1620E14540. FCST ASH CLOUD +12H: 31/2213Z SFC/FL100 15NM WIDE LINE BETWEEN N1631E14414 - N1620E14540. FCST ASH CLOUD +18H: 01/0413Z SFC/FL100 15NM WIDE LINE BETWEEN N1623E14413 - N1620E14540. REMARKS: IN THE LAST VISIBLE IMAGERY IT COULD BE SEEN THAT THE STEAM AND LIGHT ASH PLUME DIRECTION WAS BECOMING MORE WESTERLY. AT 1013Z SOME CLOUDS HAD MOVED OVER THE AREA OBSCURING THE PLUME AND HOTSPOT. ... NEXT ADVISORY: WILL BE ISSUED BY 2005MAR31/1630Z NNNN