FVXX21 KWBC 192045 VOLCANIC ASH ADVISORY ISSUED 2045 UTC 19 SEP 2000 BY THE WASHINGTON VAAC . POPOCATEPETL 00-072 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. 1200 UTC MEXICO CITY RADIOSONDE. . ERUPTION DETAILS: SERIES OF EXHALATIONS BETWEEN 1930 UTC AND 2030 UTC. . DETAILS OF ASH: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTS AN HOUR LONG SERIES OF EXHALATIONS THAT MIGHT HAVE PRODUCED ASH TO AN UNKNOWN HEIGHT. NO ASH CAN BE SEEN IN GOES-8 IMAGERY THROUGH 2015 UTC BECAUSE OF THE DENSE WEATHER CLOUDS COVERING THE AREA. CLOUDY CONDITIONS ARE ALSO LIMITING GROUND BASED OBSERVATIONS. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH THAT MIGHT EXIST AT SUMMIT LEVEL WOULD MOVE TOWARD THE NORTH AT ABOUT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 20/0230 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. . NNNN