FVXX21 KWBC 070500 . VOLCANIC ASH ADVISORY ISSUED 0500 UTC 07 NOVEMBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-083 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 AND THE INSTITUTO GEOFISICO. . ERUPTION DETAILS: THE INSTITUTO GEOFISICO REPORTS A NEARLY CONTINUOUS EMISSION OF STEAM AND ASH NEAR THE SUMMIT AND STRONG SEISMIC ACTIVITY. . DETAILS OF ASH: THE LATEST SIGMET FROM GUAYAQUIL INDICATES ASH HEIGHTS BETWEEN FL260 AND FL360. SATELLITE IMAGERY THROUGH 0415 UTC REVEALED A BROKEN METEOROLOGICAL CLOUDS AROUND THE VOLCANO BUT NO DEFINITIVE INDICATION OF ASH WAS DETECTED. THE GEOPHYSICAL INSTITUTE IN ITS DAILY REPORT YESTERDAY INDICATED THAT THE NUMBER OF ERUPTIONS AND THE AMOUNT OF ASH EMITTED HAVE INCREASED OVER WHAT HAD BEEN OBSERVED ON PREVIOUS DAYS. . TRAJECTORY: UPPER AIR WIND DATA SUGGESTS ANY ASH BETWEEN FL200 AND FL300 WOULD MOVE TOWARDS THE SOUTHEAST AROUND 5 KTS WHILE ASH BETWEEN FL300 AND FL360 WOULD MOVE TOWARDS THE SOUTHWEST AROUND 5 KNOTS. 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 07/1100 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK . NNNN