FVXX21 KWBC 311200 CCA VOLCANIC ASH ADVISORY CORRECTION ISSUED: 2000DEC31/1200Z VAAC: WASHINGTON . CORRECTED FOR VAFTAD DISTRIBUTION . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2000/218 . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 0000Z MEXICO CITY UPPER AIR SOUNDING. . ERUPTION DETAILS: ERUPTION AT APPROXIMATELY 31/1107Z . DETAILS OF ASH CLOUD: SATELLITE IMAGERY AT 1132Z SHOWS A SMALL ASH CLOUD CENTERED NEAR 1900N 9823W WHICH IS 25 KM (13 NMI) TO THE EAST OF THE VOLCANO. THE ASH PLUME IS 8 KM (4NMI) WIDE. THE ASH IS ESTIMATED AT FL280. . TRAJECTORY: ASH AT FL280 SHOULD MOVE TO THE EAST AT 50 TO 60 KTS. . OUTLOOK: SEE SIGMETS.NOTE: NCEP IS HAVING PROBLEMS GENERATING THE VAFTAD GRAPHICS FOR WAFS AND DIFAX DISTRIBUTION AND WEBPAGE. . THE NEXT MESSAGE WILL BE ISSUED AT 31/1800Z. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS HTTP://WWW.SSD.NOAA.GOV/VAAC/WASHINGTON.HTML (ALL LOWER CASE EXCEPT /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . KARST . NNNN