FVXX21 KWBC 191000 VOLCANIC ASH ADVISORY ISSUED 1000 UTC 19 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-842 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WINDS FORECAST FROM THE AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: ASH WAS LAST REPORTED OVER THE VOLCANO BY THE GEOPHYSICAL INSTITUTE AT 18/2040 UTC AND WAS ESTIMATED AT FL270. SATELLITE IMAGERY THROUGH 19/0945 UTC DOES NOT SHOW ANY ASH BUT RECENTLY WHEN ASH HAS BEEN DETECTED IT WAS BEEN OBSERVED ONLY IN VISIBLE IMAGERY. TRAJECTORY: CURRENT MODEL DATA INDICATE LIGHT AND VARIABLE WINDS FROM THE SUMMIT LEVEL TO FL270. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 19/1600 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