FVXX20 KWBC 270756 VOLCANIC ASH ADVISORY ISSUED: 2003AUG27/0800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/173 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. ERUPTION DETAILS: ASH ERUPTION STARTED AT 20/1745Z. OBS ASH DATE/TIME: 27/0715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/270 MOVING W 15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. REMARKS: ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 27/0715Z. THE MOST RECENT KNOWN ASH OBSERVATION OCCURRED AT 0413Z WHEN THE GEOPHYSICAL INSTITUTE OBSERVED ASH OVER THE VOLCANO. A PILOT REPORT AT 26/2225Z PLACED THE HEIGHT OF THE ASH FROM SUMMIT LEVEL TO FL260. A BRIGHT HOTSPOT CAN BE SEEN IN THE 0615Z SATELLITE IMAGE BUT NOT IN THE 0645Z OR 0715Z IMAGES. NEXT ADVISORY: WILL BE ISSUED BY 2003AUG27/1400Z. NNNN