FVXX21 KWBC 170600 VOLCANIC ASH ADVISORY ISSUED 0600 UTC 17 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-832 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 AT 16/0545 UTC SHOWS NO ASH ALTHOUGH THERE ARE SOME CLOUDS PRESENT. THE LAST GEOPHYSICAL INSTITUTE REPORT AT 16/1659 UTC INDICATED ASH TO FL280 MOVING WEST. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL280 WOULD MOVE WEST AT ABOUT 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 17/1200 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