FVXX21 KWBC 260700 VOLCANIC ASH ADVISORY ISSUED 0700 UTC 26 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-872 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 ..INFRARED...AND MULTISPECTRAL IMAGERY. 26/0600 UTC FORECAST UPPER WINDS FROM THE AVIATION MODEL. THE GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTS VOLCANIC ASH OVER THE VOLCANO AT 26/0529 UTC. THE ESTIMATED HEIGHT OF THIS ASH IS AT NEAR SUMMIT LEVEL. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL200 TO MOVE WEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 26/1300 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. . KARST . NNNN