FVXX21 KWBC 080430 VOLCANIC ASH ADVISORY ISSUED 0430 UTC 08 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-670 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 12 HOUR WIND FORECAST FROM THE 07/1800 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 08/0345 UTC SHOWS UPPER LEVEL CLOUDS IMPEDING THE DETECTION OF ANY ASH IN THE AREA. HOWEVER SATELLITE IMAGERY DEPICTED AN ASH EXHALATION AROUND 08/0015 UTC WITH THE ASH MOVING TO THE NORTHWEST FROM THE VOLCANO. AT 0115 UTC THE LEADING EDGE OF THE ASH WAS LOCATED 24 KM (13 NMI) FROM THE SUMMIT. CLOUDS ENTERED THE AREA AROUND 0145 UTC MAKING DETECTION OF THIS ASH DIFFICULT IN SATELLITE IMAGERY. THE GEOPHYSICAL INSTITUTE ESTIMATED THIS ASH AT FL280. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL280 WILL MOVE TOWARDS THE WEST AND NORTHWEST AT 10 - 15 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 08/1030 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. . CLARK . NNNN