FVXX20 KWBC 191504 VOLCANIC ASH ADVISORY ISSUE: 2003JUL19/1500Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 1401-09 LOCATION: N1901W09837 AREA: MEXICO SUMMIT ELEVATION: 17930 FT (5465 M) ADVISORY NUMBER: 2003/101 INFORMATION SOURCE: GOES-12 IMAGERY. MEXICO CITY METEOROLOGICAL WATCH OFFICE. MEXICO CITY UPPER AIR SOUNDING ERUPTION DETAILS: ERUPTION AT 1420Z OBS ASH DATE/TIME: 19/1445Z OBS ASH CLOUD: SFC/FL280 N1901W09837 N1911W09842 N1911W09849 N1901W09849 N1901W09837 MOVING NW 10-15 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTED A 1420Z ERUPTION OF POPOCATEPETL. A CURRENTLY SMALL BUT FAIRLY DENSE AREA OF ASH CAN BE SEEN IN GOES IMAGERY MOVING TO THE NORTHWEST. ASH HEIGHT IS DIFFICULT TO DETERMINE AND IS PARTLY BASED ON THE MEXICO CITY MWO ESTIMATE AND PARTLY ON SATELLITE IMAGERY. A BRIGHT HOTSPOT CAN BE SEEN IN THE 1432Z AND 1445Z GOES IMAGES. NEXT ADVISORY: WILL BE ISSUED BY 2003JUL19/2100Z. NNNN