FVXX21 KWBC 240800 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0800 UTC 24 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-024 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 ...GEOPHYSICAL INSTITUTE. UPPER AIR SOUNDING NEAR THE VOLCANO. . ERUPTION DETAILS: CONTINUOUS VENTING OF ASH AND STEAM. . DETAILS OF ASH: THE LATEST GOES-8 SATELLITE IMAGERY AT 0715 UTC SHOWS DENSE MULTILAYERED CLOUDS OVER THE VOLCANO MAKING IT DIFFICULT TO DETECT ANY ASH. THE GEOPHYSICAL INSTITUTE CONTINUES TO REPORT THAT SEISMIC ACTIVITY REMAINS HIGH AND IT IS LIKELY THAT THE VOLCANO WILL CONTINUE TO VENT ASH AND GASES. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL240 WILL MOVE TOWARD THE WEST BETWEEN 5 TO 15 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 24/1400 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . BROWN . NNNN