FVXX20 KWBC 171235 VOLCANIC ASH ADVISORY ISSUE: 2003JUL17/1100Z VAAC: WASHINGTON VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: CARIBBEAN SUMMIT ELEVATION: 3000 FT (915 M) ADVISORY NUMBER: 2003/599 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: NEAR CONTINUOUS EMISSIONS OF ASH AND GASES. OBS ASH DATE/TIME: 17/1015Z OBS ASH CLOUD: SFC/FL100 7 NM WIDE LINE OF ASH EXTENDING BETWEEN N1643W06211 N1643W06228 N1657W06308 MOVING W 10-15 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: EARLY MORNING VISIBLE IMAGERY SHOWS A PLUME TO THE WEST OF THE SUMMIT. IT APPEARS THAT THE ASH IS MOVING TO THE WNW AT 10-15 KNOTS...GALLINA NEXT ADVISORY: WILL BE ISSUED BY 2003JUL17/1700Z. NNNN