FVXX20 KWBC 010030 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0030 UTC 01 MAY 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-123 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: PILOT REPORT...MONTSERRAT VOLCANO OBSERVATORY...INFRARED GOES 8 IMAGERY AND GUADELOUPE SOUNDING. . ERUPTION DETAILS: ASH VENTING EVENT AROUND 30/1745 UTC. . DETAILS OF ASH CLOUD: INFRARED GOES 8 IMAGERY THRU 0015 UTC DOES NOT INDICATE ANY ASH FROM THE EARLIER ERUPTION. THE INITIAL PLUME TRACKED TOWARDS THE NORTHWEST AT 15 KTS UP TO FL050 WHILE THE SLIGHTLY HIGHER ASH AT FL100 DISSIPATED AS IT MOVED SOUTHWESTWARD. . TRAJECTORY: FROM SURFACE TO FL050 TOWARD THE NORTHWEST AT 15 TO 20 KNOTS. . 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. . THE NEXT MESSAGE WILL BE ISSUED AT 01/0630 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN