FVXX21 KWBC 271917 VOLCANIC ASH ADVISORY ISSUED 1917 UTC 27 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-878 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. UPPER AIR WIND FORECAST FROM AVIATION MODEL . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: NO ASH WAS DISCERNED IN SATELLITE IMAGERY THROUGH 1845 UTC WITH BROKEN CLOUDS IN THE VICINITY OF THE SUMMIT. THE GEOPHYSICAL INSTITUTE HAD REPORTED VOLCANIC ASH TO FL280 OVER THE VOLCANO AT 1235 UTC. TRAJECTORY: ANY ASH THAT MAY EXIST BETWEEN THE SUMMIT AND FL280 WOULD MOVE TOWARDS THE WEST AT 20 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 28/0130 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