FVXX20 KWBC 080900 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0900 UTC 08 APR 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-096 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. 0000 UTC GUADELOUPE UPPER AIR SOUNDING. . ERUPTION DETAILS: ERUPTION AT 08/0204 UTC. . DETAILS OF ASH CLOUD: HIGH LEVEL METEOROLOGICAL CLOUDS IN THE VICINITY OF THE VOLCANO HAVE PREVENTED THE DETECTION OF ASH IN SATELLITE IMAGERY THROUGH 0815 UTC. . TRAJECTORY: UPPER AIR SOUNDINGS INDICATE THAT ASH AT FL050 WOULD MOVE NORTHWEST AT ABOUT 15 KTS. FL100 WINDS WOULD PUSH THE ASH MORE TO THE WEST AT ABOUT 8KTS. . 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: N/A. . THE NEXT MESSAGE WILL BE ISSUED AROUND 08/1500 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN