FVXX21 KWBC 280800 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0800 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 ANY DETECTION OF ANY VOLCANIC ASH DIFFICULT. . THE QUITO GEOPHYSICAL INSTITUTE THROUGH THE GUAYAQUIL MWO REPORTS ASH FROM THE VOLCANO AT FL190 MOVING TOWARD THE NORTHWEST. . TRAJECTORY: NATIONAL WEATHER SERVICE NUMERICAL METEOROLOGICAL MODELS INDICATE THAT ANY ASH AT FL190 WOULD MOVE TOWARD NORTHWEST AT LESS THAN 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 28/1400 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . SCHWARTZ/SAB/NOAA/NESDIS . NNNN