FVXX21 KWBC 311430 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1430 UTC 31 MAR 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-056 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES8 INFRARED AND MULTISPECTRAL IMAGERY. . ERUPTION DETAILS: ERUPTED AT APPROXIMATELY 31/0158 UTC . DETAILS OF ASH CLOUD: OVER THE LAST 6 HOURS THE ASH CLOUD HAS CONTINUED TO DISSIPATE AND IS NOT DETECTABLE ON ANY SATELLITE IMAGERY. . 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. . THIS WILL BE THE LAST MESSAGE FOR THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN