FVXX21 KWBC 231900 VOLCANIC ASH ADVISORY ISSUED: 2002JUL23/1930Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2002/121 . INFORMATION SOURCE: GOES-8 IMAGERY. UPPER AIR SOUNDING. AVN MODEL WINDS FORECAST. MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: VENT COLLAPSE AT ABOUT 23/1200Z. . OBS ASH DATE/TIME: NIL . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE IMAGERY. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE MVO REPORTED A VENT COLLAPSE EARLIER TODAY. SINCE THEN THE ASH HAS MOVED WEST OF THE ISLAND AND HAS BECOME TOO THIN AND DIFFUSE TO BE OBSERVED ON SATELLITE IMAGERY...GALLINA . NEXT ADVISORY: NO FURTHER ADVISORIES. . NNNN