FVXX22 KWBC 120000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0000 UTC 12 NOV 1999 BY THE WASHINGTON VAAC . POPOCATEPETL 99-105 MEXICO 19.02N 98.62W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED...AND MULTISPECTRAL IMAGERY. MEXICO CITY MET WATCH OFFICE AND CENAPRED VOLCANO RESEARCH CAMERA. U.S. NUMERICAL MODEL WIND DATA. . ERUPTION DETAILS: THE MEXICO CITY MWO REPORTED A SMALL ERUPTION OF STEAM AND ASH AT 1725 UTC TO FL180. . DETAILS OF ASH CLOUD: NO ASH COULD BE SEEN IN EITHER GOES-8 SATELLITE IMAGERY OR THROUGH THE POCATEPETL RESEARCH CAMERA. THERE IS CONVECTIVE CLOUDS IN THE IMMEDIATE AREA SO THE DETECTION OF ASH IF ANY IS VERY DIFFICULT. . TRAJECTORY: NUMERICAL MODEL WIND DATA SUGGEST ANY ASH AT OR BELOW FL180 WOULD MOVE WEST NORTHWEST AT 5 TO 10 KNOTS. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE LATEST SIGMETS. . THIS WILL BE THE LAST STATEMENT ISSUED FOR THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . HUGHES - NOAA/NESDIS/SAB . NNNN