FVXX22 KWBC 161309 VOLCANIC ASH ADVISORY ISSUED: 2003JUN16/1300Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/154 INFORMATION SOURCE: GOES-9 IMAGERY. GUAM 12Z UPPER AIR SOUNDING. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 16/1202Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING NW-W 10 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: DUE TO SCATTERED HIGH LEVEL WEATHER CLOUDS AND DARKNESS THE LOW LEVEL ASH IS DIFFICULT TO DETECT. THE SOUNDING AND MODEL WOULD SAY THE ASH SHOULD BE MOVING WEST TO NORTHWEST HOWEVER IN THE LAST VISIBLE IMAGERY UP TO 09Z THE ASH WAS MAINLY MOVING WEST. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN16/1900Z. NNNN