FVXX21 KWBC 160430 VOLCANIC ASH ADVISORY ISSUED 0430 UTC 16 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-827 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE REPORT. WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 16/0415 UTC SHOWS NO ASH ALTHOUGH THERE IS EXTENSIVE CLOUDS PRESENT. THE LATEST REPORT FROM THE GEOPHYSICAL INSTITUTE AT 15/2250 UTC INDICATED ASH AT FL250 MOVING NORTHWEST. . TRAJECTORY: ASH FROM THE SUMMIT TO FL180 WILL MOVE TOWARDS THE WEST TO NORTHWEST AT 15-20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 16/1030 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