FVXX20 KWBC 011617 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1617 UTC 01 SEP 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-85 MEXCIO 19.02N 98.62W . BACKGROUND: POPOCATEPETL (1401-09) SUMMIT HEIGHT 17930 FT (5465M) . SOURCES OF INFORMATION: MEXICO CITY MWO. . ERUPTION DETAILS: 01/1537 UTC MOVING NW BETWEEN FL180 AND FL240. . DETAILS OF ASH CLOUD: NO ASH PLUME IS VISIBLE IN SATELLITE IMAGERY AS LOW AND MID LEVEL CLOUDS SURROUND THE AREA. . TRAJECTORY: TOWARD THE WEST AT 10 KTS. . 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 FOR THIS EVENT WILL BE ISSUED BY 01/2230 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN