FVXX20 KNES 300139 VOLCANIC ASH ADVISORY ISSUED: 2005AUG30/0139Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/738 INFORMATION SOURCE: HONOLULU MWO. GOES-9. ERUPTION DETAILS: ONGOING ASH EMISSIONS OBS ASH DATE/TIME: 30/0025Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL070/FL120 MOVING TO SW 15-25 KNOTS. SFC/FL070 MOVING TO S 5-15 KNOTS. FCST ASH CLOUD +6H: 30/0630Z FCST ASH CLOUD +12H: 30/1230Z FCST ASH CLOUD +18H: 30/1830Z REMARKS: WITH THE APPROACH OF TROPICAL STORM NABI... ASH DETECTION HAS BECOME DIFFICULT AND WILL BECOME NEAR IMPOSSIBLE OVER THE NEXT FEW DAYS AS CLOUDY CONDITIONS WILL DOMINATE SATELLITE DETECTION. WINDS WILL TRANSPORT ASH TO THE S IN LOW LEVELS AND SW ABOVE FL070 OVER THE NEXT 6-12 HOURS AND WILL BECOME VERY STRONG WITH THE DIRECTION BEING VERY DEPENDENT ON THE TRACK OF CIRCULATION CENTER OF NABI. AVOIDANCE OF AREA DUE TO ASH APPEARS TO BE SECONDARY TO TROPICAL CYCLONE AVOIDANCE. ...GALLINA NEXT ADVISORY: WILL BE ISSUED BY 2005AUG30/0745Z NNNN