FVXX21 KWBC 281320 VOLCANIC ASH ADVISORY ISSUED 1315 UTC 28 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-881 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. THE GEOPHYSICAL INSTITUTE IN QUITO. WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: EXTENSIVE CLOUDINESS SEEN IN SATELLITE IMAGERY THROUGH 1245 UTC PRECLUDED THE DETECTION OF ASH. NO FURTHER INDICATION OF ASH PRODUCTION HAS BEEN RECEIVED SINCE A 27/1235 UTC GEOPHYSICAL INSTITUTE REPORT OF VOLCANIC ASH TO FL280. THE GEOPHYSICAL INSTITUTE REPORTED IN YESTERDAYS DAILY REPORT THAT THE VOLCANO REMAINS SEISMICALLY ACTIVE. TRAJECTORY: ANY ASH THAT MAY EXIST NEAR THE SUMMIT LEVEL WOULD MOVE TOWARDS THE WEST-SOUTHWEST AT 20-25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 28/1900 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORIES 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK . NNNN