FVXX21 KWBC 101930 VOLCANIC ASH ADVISORY ISSUED 1930 UTC 10 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-807 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM AVIATION MODEL. . ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 10/1845 UTC SHOWS CLOUDS COVERING THE AREA AROUND THE SUMMIT MAKING ASH DETECTION DIFFICULT. ASH WAS LAST SEEN IN SATELLITE IMAGERY AT 10/1645 UTC MOVING WEST-SOUTHWEST FROM THE SUMMIT. THE ASH PLUME WAS ESTIMATED BETWEEN FL180 AND FL220. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL220 IS FORECAST TO MOVE TOWARD THE WEST AROUND 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 11/0130 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. . CLARK . NNNN