FVXX22 KWBC 111505 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1505 UTC 11 OCT 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-099 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: MEXICO CITY MWO...PILOT REPORT...GOES 8 SATELLITE IMAGERY...12Z UPPER AIR SOUNDING FROM MEXICO CITY . ERUPTION DETAILS: ERUPTION OCCURRED AT 11/1417 UTC. . DETAILS OF ASH CLOUD: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTED A SMALL EMISSION OF WATER VAPOR AND ASH OCCURRED AT 1417 UTC. GOES 8 VISIBLE IMAGERY AT 1432 UTC INDICATED A POSSIBLE SMALL ASH CLOUD OF 2 KM RADIUS CENTERED NEAR 18.9N 98.7W. THE ASH CLOUD WAS ROUGHLY 11 KM TO THE SOUTHWEST OF THE SUMMIT AND WAS ESTIMATED TO BE AT FL200. . TRAJECTORY: TOWARD THE SOUTHWEST AT 20 KNOTS. . REAL TIME SATELLITE IMAGERY ALONG WITH 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/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED AROUND 11/2100 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK/STREETT/HUGHES . NNNN