FVXX22 KWBC 171255 VOLCANIC ASH ADVISORY ISSUED: 2003JUN17/1250Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/158 INFORMATION SOURCE: GOES-9 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 17/1202Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING W 10 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: CONTINUED CLOUD COVER OVER THE AREA MAKES THE LOW LEVEL ASH DETECTION DIFFICULT. THERE HAVE BEEN NO SURFACE OR PILOT REPORTS OF ACTIVITY HOWEVER UNTIL THERE IS BETTER IMAGERY WE WILL CONTINUE THE EVENT. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN17/1900Z. NNNN