FVXX21 KWBC 042330 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2330 UTC 04 APR 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-063 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND MULTISPECTRAL IMAGERY. 1200 UTC MEXICO CITY SOUNDING. CENAPRED REPORT. . ERUPTION DETAILS: ERUPTION AROUND 04/0823UTC. . DETAILS OF ASH CLOUD: MID AND HIGH LEVEL CLOUDS CURRENTLY COVER THE AREA AROUND THE VOLCANO. IT IS NOT POSSIBLE TO DETECT THE ASH THAT HAD DRIFTED TO THE EAST FROM THE EARLIER ERUPTION. . TRAJECTORY: ANY ASH REMAINING FROM THE EARLIER ERUPTION BETWEEN FL180 AND FL300 WOULD MOVE TO THE EAST AT 30 TO 40 KTS. . 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 VAFTAD. . THIS WILL BE THE LAST MESSAGE FOR THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN