FVXX20 KWBC 071450 VOLCANIC ASH ADVISORY ISSUED 1450 UTC 07 JUL 2000 BY THE WASHINGTON VAAC . POPOCATEPETL 00-042 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... POPO CAM...AVIATION MODEL WINDS . ERUPTION DETAILS: EMISSIONS OF STEAM AND ASH AT 07/1351 UTC. . DETAILS OF ASH CLOUD: THE MEXICO CITY MWO REPORTS AN EMISSION PRODUCING ASH UP TO FL220 MOVING TOWARD THE NORTHWEST. SATELLITE IMAGERY THROUGH 1415 UTC SHOWS NO DISCERNABLE ASH PLUME DUE TO SCATTERED CLOUDS AROUND THE VOLCANO. THERE IS NO DEFINITIVE ASH SIGNATURE IN MULTISPECTRAL IMAGERY. . TRAJECTORY: ASH UP TO FL220 IS REPORTED TO BE MOVING TO THE NORTHWEST AT UP TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 07/2100 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER 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