FVXX21 KWBC 271600 VOLCANIC ASH ADVISORY ISSUED 1600 UTC 27 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-751 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. THE GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTS VOLCANIC ASH OVER THE VOLCANO AT 27/1541 UTC TO FL240 MOVING WEST. SATELLITE IMAGERY THROUGH 27/1515 UTC SHOWS LOW AND MID LEVEL CLOUDINESS OVER THE VOLCANO MAKING IT DIFFICULT TO DETECT ANY ASH. . TRAJECTORY: ACCORDING TO UPPER AIR WIND FORECASTS ASH FROM THE SUMMIT TO FL250 WILL MOVE TO THE WEST AT 15 TO 20 KTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 27/2200 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. . KARST . NNNN