FVXX21 KWBC 170000 VOLCANIC ASH ADVISORY ISSUED 0000 UTC 17 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-831 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. GEOPHYSICAL INSTITUTE REPORT. WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY AT 16/2315 UTC SHOWS NO CURRENT ASH PLUME. OCCASIONAL HOT SPOTS HAVE BEEN NOTED IN THE MULTISPECTRAL IMAGERY. THE GEOPHYSICAL INSTITUTE REPORTED ASH TO FL280 AT 16/1659 UTC MOVING WEST. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL280 WILL BE UNDER LIGHT AND VARIABLE WIND CONDITIONS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 17/0600 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