FVXX20 KWBC 231130 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1130 UTC 23 MAR 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-059 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. 23/0000 UTC GUADELOUPE SOUNDING. . ERUPTION DETAILS: ASH VENTING EVENT AROUND 22/2230 UTC. . DETAILS OF ASH CLOUD: ASH IS CURRENTLY NOT DETECTED ON SATELLITE IMAGERY THROUGH 23/1102 UTC. . TRAJECTORY: BASED ON THE 23/0000 UTC GUADELOUPE SOUNDING ASH BELOW FL100 WOULD MOVE WEST TO NORTHWEST AT 10 TO 15 KNOTS. ASH BETWEEN FL180 AND FL300 WOULD MOVE EAST AT 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 23/1730 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN