FVXX20 KWBC 200600 VOLCANIC ASH ADVISORY ISSUED: 2002DEC20/0600Z VAAC: WASHINGTON VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: CARIBBEAN SUMMIT ELEVATION: 3000 FT (915M) ADVISORY NUMBER: 2002/236 INFORMATION SOURCE: GOES-8 IMAGERY. GFS MODEL WINDS FORECAST ERUPTION DETAILS: ASH EMISSIONS OBS ASH DATE/TIME: 20/0532Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING SW 10 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: MULTISPECTRAL IMAGERY THROUGH 0532Z DOES NOT SHOW ASH BUT SHORTWAVE INFRARED IMAGERY SHOWS A BRIGHT HOTSPOT AT THE VOLCANO. NUMERICAL WEATHER MODEL DATA SUGGESTS A WIND SHIFT IN THE PAST FEW HOURS. IF THE MODEL DATA IS CORRECT ANY ASH BELOW FL100 WOULD NOW BE EXPECTED TO MOVE TOWARD THE SW RATHER THAN SE AS SEEN EARLIER. NEXT ADVISORY: WILL BE ISSUED BY 2002DEC20/1200Z NNNN