FVXX20 KWBC 161830 VOLCANIC ASH ADVISORY ISSUED 1830 UTC 16 SEP 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-239 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED..AND MULTISPECTRAL IMAGERY. 16/1200 UTC SOUNDING FROM GUADELOUPE. THE MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: SMALL ROCKFALLS OVERNIGHT YET NO SIGNIFICANT ACTIVITY. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY THROUGH 1815 UTC DOES NOT INDICATE THE PRESENCE OF ASH...HOWEVER THERE ARE HIGH CLOUDS PARTIALLY OBSCURING THE VOLCANO. THE MVO REPORTS THAT THERE HAVE BEEN SEVERAL ROCKFALLS OVERNIGHT BUT NO SIGNIFICANT ACTIVITY SINCE. . THE REMNANTS OF TROPICAL DEPRESSION 12 WILL MOVE THROUGH THE NORTHERN LEEWARD ISLANDS AND OBSCURE VIEWS FROM THE SATELLITE. THE VOLCANO HAS A HISTORY OF PRODUCING ROCKFALLS AND PYROCHLASTIC FLOWS AFTER HEAVY RAIN EVENTS...SO AVIATION INTERESTS SHOULD MONITOR THE VOLCANO IN THE COMING DAYS. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR BELOW FL100 TO MOVE SOUTHWEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THIS WILL BE THE LAST ADVISORY ISSUED ON THIS EVENT. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS HTTP://WWW.SSD.NOAA.GOV/VAAC/WASHINGTON.HTML (ALL LOWER CASE EXCEPT /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . HUGHES . NNNN