FVXX20 KWBC 181800 CCA VOLCANIC ASH ADVISORY... CORRECTION ISSUED: 2001DEC18/1800Z VAAC: WASHINGTON . CORRECTION FOR NEXT ADVISORY DATE . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2001/109 . INFORMATION SOURCE: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY MWO REPORT. CENAPRED CAMERA. . ERUPTION DETAILS: SMALL ERUPTION AROUND 18/1835Z. . DETAILS OF ASH CLOUD: THE MEXICO CITY MWO CALLED TO REPORT A SMALL ERUPTION TO AROUND FL210 AND DRIFTING SLOWLY NORTHEAST. SATELLITE IMAGERY PRIOR TO THE ERUPTION THROUGH 18/1732Z SHOWED A HOT SPOT AT THE VOLCANO. . TRAJECTORY: WINDS AROUND THE SUMMIT TO FL230 ARE LIGHT AND VARIABLE. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: WILL BE ISSUED BY 2001DEC18/1845Z. . . NNNN