FVXX20 KWBC 180440 VOLCANIC ASH ADVISORY ISSUED: 2001DEC18/0440Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2001/107 . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY MWO. . . ERUPTION DETAILS: ERUPTION AT 18/0415Z. . DETAILS OF ASH CLOUD: THE MEXICO CITY MWO REPORTS AN ERUPTION OF POPOCATEPETL TO FL240 AT 18/0413Z. A PILOT REPORT INDICATES ASH AT FL240 MOVING SOUTHWEST AT 10 KNOTS. THE GOES8 0415Z IMAGE SHOWS ASH AT THE LOCATION OF THE VOLCANO. . TRAJECTORY: ASH AT FL240 IS REPORTED MOVING SOUTHWEST AT 10 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . NEXT ADVISORY: WILL BE ISSUED BY 2001DEC18/1030Z. . . NNNN