FVXX20 KWBC 152120 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2120 UTC 15 JUNE 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-078 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: MEXICO CITY MWO...PILOT REPORT...CENAPRED...GOES-8 VISIBLE AND MULTISPECTRAL IMAGERY . ERUPTION DETAILS: ERUPTION AROUND 15/1428 UTC . DETAILS OF ASH CLOUD: THE MEXICO CITY MWO REPORTED AN ERUPTION AT 15/1428 UTC TO BETWEEN FL180 AND FL240. GOES-8 IMAGERY NEVER INDICATED ANY ASH ALTHOUGH THERE WAS EXTENSIVE CLOUDINESS IN THE AREA.. . TRAJECTORY: ANY REMAINING ASH BETWEEN FL180 AND FL240 WOULD MOVE WEST TO SOUTHWEST AT ABOUT 5-10 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. . THIS IS THE LAST MESSAGE ON THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN