FVXX20 KWBC 251745 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1745 UTC 25 APR 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-120 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: MULTISPECTRAL GOES 8 IMAGERY . ERUPTION DETAILS: SEISMIC EXPLOSIVE EVENT AROUND 25/0505 UTC. . DETAILS OF ASH CLOUD: ASH COULD NOT BE DISCERNED IN VISIBLE SATELLITE IMAGERY THROUGH 1732 UTC AND NO ADDITIONAL REPORTS OF VOLCANIC ACTIVITY HAVE BEEN RECEIVED. . 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 ISSUED ON THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN