FVXX21 KWBC 071800 VOLCANIC ASH ADVISORY ISSUED 1800 UTC 07 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-668 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. 6 HOUR UPPER LEVEL WIND FORECAST FROM THE AVIATION MODEL. GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THRU 07/1745 UTC SHOWS LOW AND MID LEVEL CLOUDINESS OVER THE VOLCANO MAKING ANY DETECTION OF ASH AND STEAM DIFFICULT. THE GEOPHYSICAL INSTITUTE REPORTED VOLCANIC ASH OVER THE VOLCANO TO FL290 AT 07/1720 UTC. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL300 WILL MOVE TOWARDS THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 08/0000 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