FVXX20 KWBC 202210 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2210 UTC 20 MAR 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-048 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: ASH PRODUCING EVENT AROUND 20/2145 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY HAS REPORTED A PARTIAL DOME COLLAPSE WHICH HAS PRODUCED AN ASH CLOUD THAT STARTED AROUND 20/2145 UTC. THE CLOUD WAS AROUND FL080 WHEN THEY CALLED AND WAS CONTINUING TO RISE SLOWLY. . TRAJECTORY: CLOUD DRIFT WINDS WOULD SUGGEST THE CLOUD BELOW FL120 WILL MOVE WEST AROUND 10 KNOTS. . 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 STATEMENT WILL BE ISSUED AROUND 20/2245 WHEN IMAGERY CAN BE ANALYZED TO PROVIDE FURTHER INFORMATION. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN