FVXX21 KWBC 272000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2000 UTC 27 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-038 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE 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 27/1915 UTC SHOWS EXTENSIVE CLOUDINESS OVER THE AREA THUS MAKING DETECTION OF ANY ASH IMPOSSIBLE. . THE QUITO GEOPHYSICAL INSTITUTE THROUGH THE GUAYAQUILL MWO REPORTS ASH FROM THE VOLCANO AT FL200 MOVING TOWARD THE SOUTHWEST. . TRAJECTORY: NATIONAL WEATHER SERVICE NUMERICAL METEOROLOGICAL MODELS INDICATE THAT ANY ASH AT FL200 WOULD MOVE TOWARD SOUTH 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 28/0200 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . WALTER/SAB/NOAA/NESDIS . NNNN