FVXX22 KWBC 180642 VOLCANIC ASH ADVISORY ISSUED: 2003JUN18/0645Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/161 INFORMATION SOURCE: GOES-9 IMAGERY. GFS MODEL WINDS FORECAST. GUAM UPPER LEVEL SOUNDING. ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 18/0602Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL090 MOVING W 10-15 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: THICK CLOUDS COVER THE AREA OBSCURING ANY ASH. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN18/1245Z. NNNN