FVXX20 KWBC 211630 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1630 UTC 21 MAR 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-052 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND MULTISPECTRAL IMAGERY MONTSERRAT VOLCANO OBSERVATORY . ERUPTION DETAILS: ASH PRODUCING EVENT AROUND 20/2145 UTC. . DETAILS OF ASH CLOUD: VISIBLE SATELLITE IMAGERY THIS MORNING DID NOT REVEAL AN ASH CLOUD. THE MONTSERRAT VOLCANO OBSERVATORY INDICATED THE ACTIVITY HAD BEEN LOW SINCE YESTERDAYS EVENT WITH THE EXCEPTION OF A MINOR ASH PRODUCING EVENT AROUND 1230 UTC TODAY. NO ASH PLUME WAS DETECTED IN SATELLITE IMAGERY FROM THIS MINOR EVENT WHICH WAS ESTIMATED BY THE OBSERVATORY AT FL0350. . TRAJECTORY: N/A . THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS www.ssd.noaa.gov/VAAC/messages.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS. . THIS WILL BE THE FINAL MESSAGE ON THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN