FVXX20 KWBC 110700 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0700 UTC 11 APR 1999 BY THE WASHINGTON VAAC CORRECTED FOR TRAJECTORY . SOUFRIERE HILLS 99-101 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL SATELLITE IMAGERY. THE MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: INITIAL ERUPTION AT 11/0640 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTS ANOTHER ERUPTION OF SOUFRIERE HILLS TO FL100. ACCORDING TO THE UPPER AIR SOUNDING THE ASH WOULD MOVE TOWARDS THE WEST AT 10 KTS. THE GOES8 SATELLITE IMAGE AT 11/0646 UTC SHOWS THE ERUPTION JUST BEGINNING.WE WILL SEND ANOTHER MESSAGE AS SOON AS POSSIBLE ONCE ASH MOVEMENT IS DETECTED IN THE IMAGERY. . TRAJECTORY: ASH TO FL100 WILL MOVE TOWARDS THE WEST AT 10 KTS. . 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 AT 11/1300 UTC OR EARLIER ONCE ASH MOVEMENT IS DETECTED IN SATELLITE IMAGERY. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN