FVXX20 KWBC 130310 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0310 UTC 13 MAR 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-026 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: METEOROLOGICAL WATCH OFFICE IN MEXICO CITY...GOES-8 IMAGERY. . ERUPTION DETAILS: APPROXIMATELY 12/2348 UTC. . DETAILS OF ASH CLOUD: ACCORDING TO THE MEXICO CITY METEOROLOGICAL WATCH OFFICE ANOTHER ERUPTION OF POPOCATEPETL OCCURRED AT 2348 UTC. THIS EMISSION WAS REPORTED TO FL210 MOVING TO THE EAST SOUTHEAST AT ABOUT 15 KTS. NONE OF THIS ASH WAS VISIBLE ON INFRARED OR MULTISPECTRAL IMAGERY THROUGH 13/0245 UTC. . TRAJECTORY: EAST SOUTHEAST AT ABOUT 15 KNOTS ESTIMATED AT FL210. . 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 AND SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 13/0930. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN