FVXX20 KWBC 301215 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1215 UTC 30 MAR 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-074 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: ASH VENTING THAT HAS LASTED FOR 30 MINUTES AND WAS STILL CONTINUING WHEN THIS BULLETIN WAS ISSUED. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTS THAT LOW LEVEL ASH VENTING HAS BEEN OCCURRING FOR THE LAST 30 MINUTES. SATELLITE IMAGERY DOES NOT YET SHOW THIS ACTIVITY. . TRAJECTORY: THE OBSERVATORY INDICATES THAT THE ASH IS MOVING WESTWARD. . 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 WITHIN THE HOUR. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN