FVXX21 KWBC 110430 VOLCANIC ASH ADVISORY ISSUED 0430 UTC 11 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-682 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 11/0345 UTC DUE TO THE MID LEVEL WEATHER CLOUDS COVERING THE AREA. AT ABOUT 10/2145 UTC A POSSIBLE FAINT ASH PLUME WAS OBSERVED THROUGH A BREAK IN THE CLOUDS. THIS PLUME EXTENDED FROM THE SUMMIT TOWARD THE WEST AND WAS UP TO ABOUT FL230. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL230 WOULD MOVE TOWARD THE WEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 11/1030 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