FVXX20 KWBC 222240 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2240 UTC 22 MAR 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-056 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE IMAGERY. MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: ASH VENTING EVENT AROUND 22/1445 UTC AND 22/2230 UTC. . DETAILS OF ASH CLOUD: THE SMALL LOW LEVEL ASH PLUME PREVIOUSLY SEEN IN IMAGERY HAS BECOME TO FAINT TO DETECT ANY LONGER. HOWEVER THE VOLCANO OBSERVATORY HAS JUST CALLED WITH ANOTHER EVENT AT 2230 UTC BUT BECAUSE OF CLOUD COVER THEY COULD NOT ESTIMATE THE HEIGHT OF THE ASH. . TRAJECTORY: ASH BELOW FL100 WILL MOVE WEST TO NORTHWEST AROUND 15 TO 20 KNOTS. ASH BETWEEN FL180 AND FL300 WILL MOVE EAST AROUND 20 TO 50 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 22/2300 WITH SATELLITE IMAGERY UPDATE INFORMATION. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN