FVXX21 KWBC 120930 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0930 UTC 12 MAR 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-021 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES-8 AND GOES-10 INFRARED AND MULTISPECTRAL SATELLITE IMAGERY. . ERUPTION DETAILS: ERUPTION AT 12/0145 UTC. . DETAILS OF ASH CLOUD: GOES-8 AND GOES-10 MULTISPECTRAL IMAGERY THROUGH 0900 UTC SHOWS THE ASH CLOUD COMPLETELY DISSIPATED. . TRAJECTORY: N/A . 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 AND VAFTAD. . THIS WILL BE THE LAST MESSAGE ISSUED FOR THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN