FVXX21 KWBC 290400 VOLCANIC ASH ADVISORY ISSUED 0400 UTC 29 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-758 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. THE GEOPHYSICAL INSTITUTE IN QUITO. 12 HOUR WINDS FORECAST FROM THE 18 UTC AVIATION MODEL . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 29/0315 UTC DOES NOT CURRENTLY SHOW ANY ASH FROM THE VOLCANO. HOWEVER OVER THE PAST FEW IMAGES THERE HAS BEEN A DISTINCT HOT SPOT. THE GEOPHYSICAL INSTITUTE CONFIRMED THAT AN EXPLOSION OCCURRED AT 2006 UTC AND AN ASH COLUMN WAS PRODUCED. THIS ASH COLUMN WAS ESTIMATED TO BE UP TO FL280. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL280 WOULD MOVE WESTWARD AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 29/1000 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. . NNNN