FVXX21 KWBC 171535 VOLCANIC ASH ADVISORY ISSUED 1535 UTC 17 NOV 2000 BY THE WASHINGTON VAAC . POPOCATEPETL 00-117 MEXICO 1901N 9837W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY METEOROLOGICAL WATCH OFFICE. UPPER AIR WIND FORECAST FROM AVIATION MODEL. . ERUPTION DETAILS: STEAM AND POSSIBLE ASH EMISSION AT 17/1510 UTC . DETAILS OF ASH CLOUD: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTS A STEAM AND ASH EMISSION FROM THE VOLCANO. THE NEAR INFRARED SATELLITE IMAGERY THROUGH 17/1515 UTC SHOWS A DEFINITE HOT SPOT OVER THE VOLCANO BUT THE ASH PLUME IS TOO THIN TO DETECT IN VISIBLE IMAGERY. THE PLUME IS ESTIMATED TO BE UP TO FL210 MOVING TOWARDS THE NORTH NORTHWEST. . TRAJECTORY: ASH FROM THE SUMMIT TO FL210 WILL MOVE TOWARDS THE NORTH NORTHWEST AT 10 TO 15 KTS. . OUTLOOK: SEE SIGMETS . THE NEXT MESSAGE WILL BE ISSUED AT 17/2130 UTC. . 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. . KARST . NNNN