FVXX22 KWBC 040020 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0020 UTC 04 AUG 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-196 WEST INDIES 16.7N 62.2W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: APPROXIMATELY 03/2345 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTED THAT THE SOUFRIERRE HILLS VOLCANO ERUPTED AROUND 2345 UTC. THE HEIGHT OF THE ASH COLUMN WAS ESTIMATED UP TO FL150. . TRAJECTORY: ASH IS MOVING TOWARD THE NORTHWEST. . 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 FOLLOW AS SOON AS SATELLITE DATA BECOMES AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN