FVXX21 KWBC 271900 VOLCANIC ASH ADVISORY ISSUED 1900 UTC 27 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1004 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. WINDS FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1815 UTC SHOWED EXTENSIVE CLOUD COVER OVER THE VOLCANO AND SURROUNDING REGIONS PRECLUDING THE DETECTION OF ASH. VISIBLE IMAGERY PRIOR TO THE ARRIVAL OF CLOUD COVER SUGGESTED THAT THE INTENSITY OF THE ASH EMISSIONS WAS DECREASING. THE ASH PLUME HAD BEEN ESTIMATED NEAR FL250. . TRAJECTORY: TOWARDS THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 28/0100 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. . TURK . NNNN