FVXX21 KWBC 110730 VOLCANIC ASH ADVISORY ISSUED 0730 UTC 11 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-809 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM AVIATION MODEL. JULY 10 REPORT FROM GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 11/0645 UTC POSSIBLY BECAUSE OF THE LOW LEVEL WEATHER CLOUDS IN THE AREA. ASH WAS LAST SEEN IN SATELLITE IMAGERY AT 10/1645 UTC. THIS ASH WAS ESTIMATED BETWEEN FL180 AND FL220. AND EXTENDED FROM THE SUMMIT TOWARD THE WEST-SOUTHWEST. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL220 WOULD MOVE TOWARD THE WEST AT ABOUT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 11/1330 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