FVXX22 WBC 161319 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1323 UTC 16 May 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-065 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: MEXICO CITY METEOROLOGICAL WATCH OFFICE...CENAPRED...PIREP...GOES-8 VISIBLE AND INFRARED . ERUPTION DETAILS: LAST ERUPTION AT 16/1226 UTC. . DETAILS OF ASH CLOUD: MEXICO CITY HAS ISSUED SIGMET 1A. AN OBSERVATION AT 16/1230 UTC HAD ASH 10NM SSW BETWEEN FL180 AND FL210. GOES-8 VISIBLE SATELLITE IMAGERY AT 1302 UTC SHOWS MIDDLE AND HIGH LEVEL CLOUDS OVER THE AREA. WE ARE UNABLE TO DETECT ANY ASH. . TRAJECTORY: ANY ASH FROM FL180 TO FL210 WOULD MOVE TOWARDS THE SOUTHWEST AT LESS THAN 20 KTS. . 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. . NEXT MESSAGE WILL BE ISSUED BY 16/1900 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN