FVXX20 KWBC 121430 VOLCANIC ASH ADVISORY ISSUED: 2003JAN12/1430Z VAAC: WASHINGTON VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: CARIBBEAN SUMMIT ELEVATION: 3000 FT (915M) ADVISORY NUMBER: 2003/048 INFORMATION SOURCE: GOES-8 IMAGERY. 12Z GUADELOUPE UPPER AIR SOUNDING. GFS MODEL WINDS FORECAST ERUPTION DETAILS: SERIES OF ASH AND STEAM EMISSIONS OBS ASH DATE/TIME: 12/1402Z OBS ASH CLOUD: SFC/FL100 12 NM WIDE LINE OF ASH EXTENDING BETWEEN N1643W06211 N1649W06314. ASH IS MOVING W 20 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: A PLUME OF FAIRLY THICK ASH EXTENDS FROM THE VOLCANO TOWARD THE WEST. THE PLUME IS ABOUT 12 NM WIDE AT ITS WIDEST PART AND 62 KM LONG. NEXT ADVISORY: WILL BE ISSUED BY 2003JAN12/2030Z. NNNN