FVXX20 KWBC 280130 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0130 UTC 28 JAN 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-002 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...2100 UTC HIGH DENSITY SATELLITE WINDS . ERUPTION DETAILS: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTS AN EXHALATION TO FL220 AT 27/1840 UTC. THE STEAM AND ASH IS MOVING NORTHWARD AT 10 TO 15 KTS. . DETAILS OF ASH CLOUD: A SMALL ASH PLUME WAS VISIBLE ON THE SATELLITE IMAGERY SHORTLY AFTER THE ABOVE REPORT. THIS PLUME MOVED TO THE NORTHEAST AND DISSIPATED. AT THIS TIME NO ASH PLUME CAN BE SEEN ON THE SATELLITE IMAGERY. . TRAJECTORY: ASH BETWEEN FL180 AND FL220 WOULD MOVE NORTH TO NORTHEAST AT 10 TO 15 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. . THIS WILL BE THE LAST MESSAGE FOR THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN