FVXX21 KWBC 280200 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0200 UTC 28 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-039 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY..GEOPHYSICAL INSTITUTE AND NATIONAL WEATHER SERVICE NUMERICAL MODELS. . ERUPTION DETAILS: OCCASIONAL VENTING OF ASH AND STEAM. . DETAILS OF ASH: GOES-8 SATELLITE IMAGERY THROUGH 28/0115 UTC SHOWS THE AREA AROUND THE VOLCANO SHROUDED IN THICK CLOUDINESS MAKING DETECTION OF VOLCANIC ASH IMPOSSIBLE. . THE QUITO GEOPHYSICAL INSTITUTE THROUGH THE GUAYAQUILL MWO REPORTS ASH FROM THE VOLCANO AT FL190 MOVING TOWARD THE SOUTHEAST. . TRAJECTORY: NATIONAL WEATHER SERVICE NUMERICAL METEOROLOGICAL MODELS INDICATE THAT ANY ASH AT FL190 WOULD MOVE TOWARD SOUTHEAST AT 5-10 KT. . 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. . THE NEXT STATEMENT WILL BE ISSUED AROUND 28/0800 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . WALTER/SAB/NOAA/NESDIS . NNNN