FVXX20 KWBC 110748 VOLCANIC ASH ADVISORY ISSUED: 2003MAR11/0800Z VAAC: WASHINGTON VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: CARIBBEAN SUMMIT ELEVATION: 3000 FT (915M) ADVISORY NUMBER: 2003/265 INFORMATION SOURCE: GOES-8 IMAGERY. UPPER AIR SOUNDING. MONTSERRAT VOLCANO OBSERVATORY. GFS MODEL WINDS FORECAST ERUPTION DETAILS: EMISSIONS OF GASES AND LIGHT ASH. OBS ASH DATE/TIME: 11/0715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING W 5-20 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: ASH IS TOO LOW OR TOO THIN TO DETECT IN MULTISPECTRAL OR INFRARED SATELLITE IMAGERY THROUGH 0715Z. HOWEVER AN INTERMITTENT HOTSPOT CAN BE SEEN. THE MONTSERRAT VOLCANO OBSERVATORY REPORTED A SMALL EXPLOSION AROUND 10/2200Z THAT SENT ASH TO BETWEEN FL080 AND FL100. NEXT ADVISORY: WILL BE ISSUED BY 2003MAR11/1400Z NNNN