FVXX21 KWBC 251800 VOLCANIC ASH ADVISORY ISSUED: 2000DEC25/1800Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2000/211 . INFORMATION SOURCE: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY MWO. UPPER WINDS FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: NEW ERUPTION AT 25/1645Z. . DETAILS OF ASH CLOUD: ASH IS NO LONGER VISIBLE OVER GUATEMALA AT 25/1715Z. HOWEVER ANOTHER NEW PLUME WAS VISIBLE FOR ONE IMAGE AT 1645Z. THIS PLUME EXTENDED NORTHEAST..LESS THAN 5KM.. AWAY FROM THE SUMMIT. THIS NEW PLUME IS NO LONGER VISIBLE IN SUBSEQUENT IMAGES. THE MEXICO CITY MWO PLACED THE HEIGHT OF THIS NEW ASH PLUME BETWEEN FL180 AND FL250. . TRAJECTORY: ASH BETWEEN FL180 AND FL250 WOULD MOVE TOWARDS THE NORTHEAST AT 20-30 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED AT 26/0000Z. . 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. . WALTER . NNNN