FVXX21 KWBC 180056 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0056 UTC 18 JUNE 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-080 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: MEXICO CITY MWO AND CENEPRED REPORTS. 1200 UTC MEXICO CITY SOUNDING. GOES 8 IMAGERY. CENEPRED REMOTE CAMERA. . ERUPTION DETAILS: REPORTED ERUPTION 17/1936 UTC TO FL200. . DETAILS OF ASH CLOUD: MEXICO CITY MWO AND CENEPRED REPORTED A MINOR ERUPTION OF THE POPOCATEPETL VOLCANO TO FL200 POSSIBLY CONTAINING ASH. NO PLUME WAS EVER VISIBLE ON GOES8 IMAGERY ALTHOUGH THERE HAS BEEN EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA. . TRAJECTORY: THE 17/1200 UTC MEXICO CITY UPPER AIR SOUNDING SUGGEST ANY ASH AT THIS REPORTED LEVEL WOULD MOVE TOWARD THE WEST NORTHWEST AT 5-10 KNOTS. . 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 LATEST SIGMETS. . THIS IS THE LAST MESSAGE ON THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN