FVXX22 KWBC 050500 VOLCANIC ASH ADVISORY ISSUED: 2003JUL05/0500Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/229 INFORMATION SOURCE: GOES 9 IMAGERY. PILOT REPORT. ERUPTION DETAILS: ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 05/0413Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL080 MOVING W 15-20 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: THE LATEST PILOT REPORT FROM GUAM MWO CONFIRMS THAT A THIN ASH PLUME IS BEING EMITTED FROM THE VOLCANO. THE ASH IS ESTIMATED TO FL080 AND IS MOVING W AT 15 TO 20 KNOTS. NEXT ADVISORY: WILL BE ISSUED BY 2003JUL05/1100Z NNNN