FVXX21 KWBC 081300 VOLCANIC ASH ADVISORY ISSUED: 2001DEC08/1300Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/266 . INFORMATION SOURCE: GOES-8 VISIBLE/INFRARED/MULTISPECTRAL IMAGERY. 08/12Z UPPER AIR SOUNDING FROM GUADELOUPE. . ERUPTION DETAILS: LOW LEVEL ASH EMISSION STARTING BEFORE 08/1245Z. . DETAILS OF ASH CLOUD: EARLY MORNING SATELLITE IMAGERY THROUGH 1245Z SHOWS A LOW LEVEL PLUME OF ASH EXTENDING TO THE WEST OF THE VOLCANO. THE LEADING EDGE OF THE ASH IS AT 1633N 6327W WHICH IS 139 KM (75 NMI) FROM THE SUMMIT. THE ASH IS ESTIMATED AT FL060. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR BELOW FL060 WILL MOVE TOWARDS THE WEST AT 15 TO 20KTS. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: WILL BE ISSUED BY 2001DEC08/1900Z . KARST . NNNN