FVXX21 KWBC 211410 VOLCANIC ASH ADVISORY . CORRECTION TO DATE/TIME . ISSUED: 2001DEC21/1410Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2001/116 INFORMATION SOURCE: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY METEOROLOGICAL WATCH OFFICE. CENAPRED. SIX HOUR AVIATION FORECAST. . ERUPTION DETAILS: VENTING OF STEAM AND ASH AT 21/1235Z. . DETAILS OF ASH CLOUD: SATELLITE IMAGERY THROUGH 1345Z SHOWS NO VISIBLE ASH PLUME. A HOT SPOT IS VISIBLE IN MULTISPECTRAL IMAGERY. . TRAJECTORY: ASH AT FL230 MOVING NORTHEAST AT ABOUT 25 KTS. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: WILL BE ISSUED BY 2001DEC21/2000Z . NNNN