FVXX22 KWBC 221501 VOLCANIC ASH ADVISORY ISSUED: 2003MAY22/1500Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/051 INFORMATION SOURCE: GOES-9 IMAGERY. UPPER AIR SOUNDING ERUPTION DETAILS: ONGOING ASH EMISSIONS...FIRST ERUPTION BEGAN MAY 10 OBS ASH DATE/TIME: 22/1425Z OBS ASH CLOUD: SFC/FL120 ASH NOT IDENTIFIABLE IN SATELLITE DATA. WINDS SFC/120 MOVING SOUTHWEST AT 10-15 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: CLOUDS FROM TYPHOON CHAN-HOM ARE OBSCURING THE AREA OF THE VOLCANO. THE LARGE AREA OF ASH WEST OF THE SUMMIT IS TOO DIFFUSE TO OBSERVE IN MULTISPECTRAL OR INFRARED IMAGERY. NEXT ADVISORY: WILL BE ISSUED BY 2003MAY22/2100Z. NNNN