FVXX21 KWBC 291600 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1600 UTC 29 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-628 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. GUAYAQUIL METEOROLOGICAL WATCH OFFICE. 12 HOUR WIND FORECAST FROM THE 29/0600 AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 29/1545 UTC SHOWS EXTENSIVE CLOUDS OVER THE VOLCANO MAKING ANY DETECTION OF ASH DIFFICULT. THE LAST REPORTED ASH OVER THE VOLCANO WAS AT 28/1227 UTC BUT THE VOLCANO REMAINS UNSTABLE SO FURTHER ERUPTIONS MAY OCCUR AT ANY TIME. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL250 WOULD MOVE TO THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 29/2200 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS 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