FVXX22 KWBC 201935 VOLCANIC ASH ADVISORY ISSUED: 2003JUN20/1900Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/171 INFORMATION SOURCE: GOES-9 IMAGERY. MWO GUAM. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 20/1825Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL080 MOVING W 10-15 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: IN THE LATEST SATELLITE IMAGERY 20/1825Z SCATTERED CLOUDS ACROSS THE REGION HAS MADE IT DIFFICULT TO DETECT ASH. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN21/0100Z. NNNN