FVXX21 KWBC 191700 VOLCANIC ASH ADVISORY ISSUED 1700 UTC 19 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-843 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR WIND FORECAST FROM THE 19/1200 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: ASH WAS NOT SEEN IN THE SATELLITE IMAGERY THROUGH 19/1645 UTC. HOWEVER AT 19/1320 UTC THE GEOPHYSICAL INSTITUTE REPORTED ASH OVER THE SUMMIT TO FL270 MOVING NORTHWEST. TRAJECTORY: CURRENT MODEL DATA INDICATE LIGHT AND VARIABLE WINDS FROM THE SUMMIT TO FL270. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 19/2300 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. . WALTER . NNNN