FVXX20 KWBC 080150 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0150 UTC 08 SEPTEMBER 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-211 WEST INDIES 16.7N 62.2W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY...0000 UTC GUADELOUPE RADIOSONDE. . ERUPTION DETAILS: ERUPTION AT APPROXIMATELY 08/0120 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTS AN ERUPTION PRODUCING ASH THAT THEY ESTIMATE REACHED ABOUT FL120. TRAJECTORY: ASH WAS OBSERVED TO MOVE TO THE WEST. UPPER AIR PATTERNS SUGGEST THAT ANY ASH AT FL120 WILL MOVE TO THE WEST AT ABOUT 20 KNOTS. . REAL TIME SATELLITE IMAGERY ALONG WITH 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/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED AS SOON AS SATELLITE IMAGERY BECOMES AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN