FVXX21 KWBC 211330 VOLCANIC ASH ADVISORY ISSUED 1330 UTC 21 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-724 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR WIND FORECAST FROM THE 21/0600 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 21/1245 UTC SHOWS EXTENSIVE CLOUDS OVER AND AROUND THE AREA OF THE VOLCANO MAKING DETECTION OF ASH DIFFICULT. HOWEVER AT 211025 UTC THE GEOPHYSICAL INSTITUTE DID REPORT ASH OVER THE SUMMIT BUT DID NOT INDICATE A HEIGHT. . TRAJECTORY: ANY ASH THAT MAY EXIST BETWEEN THE SUMMIT AND FL220 WOULD MOVE TOWARDS THE WEST AT 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 21/1930 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. . WALTER . NNNN