FVXX21 KWBC 210100 VOLCANIC ASH ADVISORY ISSUED: 2003APR21/0100Z VAAC: WASHINGTON VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: CARIBBEAN SUMMIT ELEVATION: 3000 FT (915 M) ADVISORY NUMBER: 2003/423 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUED EMISSION OF GASES AND ASH. OBS ASH DATE/TIME: 21/0045Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE IN SATELLITE DATA. WINDS SFC/FL070 MOVING N 15-20 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: EXTENSIVE CLOUDS COVERS THE AREA OBSCURING ANY ASH. NEXT ADVISORY: WILL BE ISSUED BY 2003APR21/0700Z. NNNN