FVXX20 KWBC 292107 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2107 UTC 29 JAN 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-003 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: SIGMET FROM MEXICO CITY MWO...GOES 8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY....1200 UTC SOUNDING FROM MEXICO CITY. . ERUPTION DETAILS: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTS AN EXHALATION OF STEAM AND ASH UP TO FL290 AT 29/2015 UTC. THE STEAM AND ASH WAS REPORTED MOVING NORTHEAST. . DETAILS OF ASH CLOUD: NO OBVIOUS ASH SIGNATURES WERE OBSERVED ALTHOUGH THERE WAS EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA. . TRAJECTORY: THE 1200 UTC FROM MEXICO CITY INDICATES THAT ASH BETWEEN FL180 AND FL290 WOULD MOVE TOWARD THE EAST-NORTHEAST AT UP TO 20KT. . 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. . THIS NEXT MESSAGE WILL BE ISSUED BY 30/0300 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN