FVXX21 KWBC 041700 VOLCANIC ASH ADVISORY ISSUED: 2000DEC04/1700Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2000/156 INFORMATION SOURCE: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. . ERUPTION DETAILS: SATELLITE IMAGERY INDICATES A COUPLE OF EXHALATIONS OCCURRED BETWEEN 0945Z AND 1030Z. . DETAILS OF ASH CLOUD: GOES-8 SATELLITE IMAGERY THROUGH 04/1615Z SHOWS NO ASH IN THE VICINITY OF POPOCATEPETL. ASH FROM THE EARLIER EXHALATIONS MOVED TOWARD THE EAST AND HAS BECOME TOO DIFFUSED TO BE DETECTED IN THE IMAGERY. . TRAJECTORY: ASH MOVED TOWARD THE EAST AT ABOUT 40 KTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 04/2300Z. . 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. . BROWN . NNNN