FVXX20 KNES 041325 VOLCANIC ASH ADVISORY ISSUED: 2005AUG04/1325Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/631 INFORMATION SOURCE: GFS MODEL WINDS. RADIOSONDE. GOES-9. ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND GASES OBS ASH DATE/TIME: 04/1225Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL050 MOVING TO W 10 KNOTS. FL050/FL200 MOVING TO NW 10 KNOTS. FCST ASH CLOUD +6H: 04/1830Z FCST ASH CLOUD +12H: 05/0030Z FCST ASH CLOUD +18H: 05/0630Z REMARKS: DUE TO MULTIPLE LAYERS OF CLOUDS NO ASH CAN BE DETECTED IN IMAGERY. THE FORECAST WINDS SHOW ANY LOWER LEVEL ASH WILL MOVE MORE NORTHWESTERLY AND INCREASE SLIGHTLY IN SPEED OVER THE NEXT 12 HOURS. ...SWANSON NEXT ADVISORY: WILL BE ISSUED BY 2005AUG04/1930Z NNNN