FVXX20 KWBC 182000 VOLCANIC ASH ADVISORY ISSUED: 2000DEC18/2000Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2000/193 INFORMATION SOURCE: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. 12Z UPPER AIR DATA FROM MEXICO CITY. POPOCATEPETL CAMERA. . ERUPTION DETAILS: ERUPTION BEGAN ABOUT 17/1250Z. . DETAILS OF ASH CLOUD: NO ASH COULD BE DISCERNED IN SATELLITE IMAGERY THROUGH 1945Z AS HIGH AND LOW CLOUD HAVE OBSCURED THE SUMMIT. THERE WAS ALSO NO INDICATION OF THE RESIDUAL ASH CLOUD SEEN EARLIER FAR TO THE WEST SOUTHWEST OF THE SUMMIT. THE POPOCATEPETL CAMERA SUGGESTED THAT AN INTERMITTENT PLUME OF STEAM AND POSSIBLY SOME ASH CONTINUES TO RISE FROM THE CRATER. A HOT SPOT HAS BEEN NOTED IN SATELLITE IMAGERY THROUGH BREAKS IN THE CLOUD. . TRAJECTORY: ANY ASH THAT MAY EXIST NEAR THE SUMMIT TO FL300 WOULD MOVE TOWARDS THE EAST NORTHEAST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 19/0200Z. . 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. . TURK/RUMINSKI . NNNN