FVXX22 KWBC 161905 VOLCANIC ASH ADVISORY ISSUED: 2003JUN16/1900Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/155 INFORMATION SOURCE: GOES-9 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 16/1802Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING NW 10 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: DUE TO WEATHER CLOUDS AND DARKNESS THE LOW LEVEL ASH IS DIFFICULT TO DETECT. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN17/0100Z. NNNN