FVXX21 KWBC 291730 VOLCANIC ASH ADVISORY . ISSUED: 2001DEC29/1730Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2001/129 INFORMATION SOURCE: MEXICO CITY METEOROLOGICAL WATCH OFFICE. GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM 29/1200Z AVIATION MODEL. 29/1200Z MEXICO CITY UPPER AIR SOUNDING. . ERUPTION DETAILS: ASH OBSERVED AT 29/1032Z. . DETAILS OF ASH CLOUD: ASH IS NOT OBSERVED IN THE SATELLITE IMAGERY THROUGH 29/1702Z. . TRAJECTORY: ANY REMAINING ASH BETWEEN FL180 AND FL290 WILL MOVE TOWARDS THE NORTHEAST AT 20 TO 30 KNOTS. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: NO FURTHER ADVISORIES. . WALTER . NNNN