FVXX21 KWBC 111145 . VOLCANIC ASH ADVISORY ISSUED 1145 UTC 11 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-104 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED VISIBLE AND MULTISPECTRAL IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMETS...GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: CONTINUOUS VENTING OF ASH AND STEAM NOW AT LOWER LEVELS. . DETAILS OF ASH: FIRST VISIBLE SATELLITE IMAGES THROUGH 1115 UTC INDICATED CONVECTION OVER THE SUMMIT AND THE IMMEDIATE SURROUNDINGS PRECLUDING THE DETECTION OF ASH. THE LATEST SIGMET FROM THE GUAYAQUIL MWO INDICATES ASH TO FL250. . TRAJECTORY: UPPER AIR DATA INDICATE THAT ASH TO FL250 WOULD MOVE EAST AT 15 KTS. . 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 http://www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 11/1730. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK . NNNN