FVXX21 KWBC 281900 VOLCANIC ASH ADVISORY ISSUED 1900 UTC 28 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-882 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: HIGH THIN CLOUDS SEEN IN SATELLITE IMAGERY THROUGH 1745 UTC MADE ASH DETECTION DIFFICULT. THE GEOPHYSICAL INSTITUTE INDICATED THERE WAS AN EMISSION OF ASH THIS MORNING TO ABOUT FL180 BUT LITTLE GENERATION OF ASH HAS BEEN NOTED SINCE THAT TIME. TRAJECTORY: ANY ASH THAT MAY EXIST NEAR THE SUMMIT LEVEL WOULD MOVE TOWARDS THE WEST-SOUTHWEST AT 15-20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 29/0100 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