FVXX20 KWBC 200200 VOLCANIC ASH ADVISORY ISSUED: 2001DEC20/0200Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2001/114 . INFORMATION SOURCE: MEXICO CITY MWO REPORT. GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY UPPER AIR SOUNDING. SIX HOUR WIND FORECAST FROM THE 19/1800Z AVIATION MODEL. . ERUPTION DETAILS: NEW EXHALATION AT 20/0127Z. . DETAILS OF ASH CLOUD: THE MEXICO CITY MWO RECEIVED A REPORT FROM CENAPRED THAT THE VOLCANO HAD AN OTHER EXHALATION AT 20/0127Z. THE ASH WAS REPORTED TO FL250 AND MOVING TO THE NORTHEAST AT 25 KNOTS. CURRENT SATELLITE IMAGERY THROUGH 20/0132Z DOES SHOW A VERY SMALL AREA OF ASH JUST TO THE NORTHEAST OF THE SUMMIT. . TRAJECTORY: ASH AT FL250 WILL MOVE TOWARDS THE NORTHEAST AT 25 KNOTS. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: NEXT ADVISORY: 2001DEC20/0800Z. . WALTER . NNNN