FVXX21 KWBC 071100 . VOLCANIC ASH ADVISORY ISSUED 1100 UTC 07 NOVEMBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-084 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY . ERUPTION DETAILS: THE INSTITUTO GEOFISICO REPORTS A NEARLY CONTINUOUS EMISSION OF STEAM AND ASH NEAR THE SUMMIT AND STRONG SEISMIC ACTIVITY. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1015 UTC SUGGESTED THE POSSIBILITY OF A VERY NARROW PLUME EXTENDING FROM THE SUMMIT TO POINT 1.6S78.3W...NEARLY 20 KM (11 NMI) TO THE SOUTHEAST OF THE SUMMIT. THE PLUME WAS 10 KM (5 NMI) WIDE. A HOT SPOT IS ALSO SEEN IN NEAR INFRARED SATELLITE IMAGERY. THE HEIGHT OF THE ASH IS ESTIMATED TO BE FL300. . TRAJECTORY: UPPER AIR WIND DATA SUGGESTS ANY ASH BETWEEN FL200 AND FL300 WOULD MOVE TOWARDS THE SOUTHEAST AROUND 5 KTS. REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS 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/) . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED AROUND 07/1700 UTC OR SOONER IF CONDITIONS WARRANT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK . NNNN