FVXX20 KWBC 080830 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0830 UTC 08 SEPTEMBER 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-213 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...GOES-8 MULTISPECTRAL AND INFRARED SATELLITE IMAGERY...U.S. NATIONAL WEATHER SERVICE NUMERICAL WEATHER MODEL WIND DATA. . ERUPTION DETAILS: ERUPTION AT APPROXIMATELY 08/0120 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTED AN ERUPTION PRODUCING ASH THAT THEY ESTIMATE REACHED ABOUT FL120. ASH FROM THIS ERUPTION COULD NEVER BE DISCERNED IN SATELLITE IMAGERY THROUGH 0745 UTC. THERE ARE NO PILOT REPORTS OF ASH IN THE AREA OF THE VOLCANO. TRAJECTORY: THE VOLCANO OBSERVATORY REPORTED THAT THE ASH MOVED TO THE WEST. UPPER AIR PATTERNS SUGGEST THAT ANY ASH AT FL120 WILL MOVE TO THE WEST AT ABOUT 15 OR 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. . THIS WILL BE THE LAST MESSAGE FOR THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN