FVXX21 KWBC 081900 VOLCANIC ASH ADVISORY ISSUED 1900 UTC 08 SEP 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1053 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM THE 08/1200 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1815 UTC SHOWS MID AND HIGH LEVEL CLOUDS OVER THE VOLCANO MAKING IT DIFFICULT TO DETECT ASH. THE VOLCANO REMAINS UNSTABLE AND MAY ERUPT AT ANY TIME. . TRAJECTORY: ANY ASH AROUND NEAR SUMMIT WILL MOVE TOWARDS THE WEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 09/0100 UTC. . REAL TIME SATELLITE IMAGERY AND 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. . KARST . NNNN