FVXX21 KWBC 061700 . VOLCANIC ASH ADVISORY ISSUED 1700 UTC 06 NOVEMBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-081 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...GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMETS. . ERUPTION DETAILS: THE INSTITUTO GEOFISICO REPORTS A NEARLY CONTINUOUS EMISSION OF STEAM AND ASH AND STRONG SEISMIC ACTIVITY. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1545 UTC SHOWS DENSE METEOROLOGICAL CLOUDS OVER THE VOLCANO AND NO ASH CAN BE DETECTED. . TRAJECTORY: UPPER AIR WIND DATA SUGGESTS ASH BETWEEN FL200 AND FL250 WILL MOVE TOWARDS THE SOUTHEAST AT 10 TO 20 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 06/2300 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN