FVXX20 KWBC 280757 VOLCANIC ASH ADVISORY ISSUED: 2003AUG28/0800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/177 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. ERUPTION DETAILS: ASH ERUPTION STARTED AT 20/1745Z. OBS ASH DATE/TIME: 28/0745Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/260 MOVING WEST AT 10-20 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. REMARKS: NO ASH CAN BE SEEN IN INFRARED OR MULTISPECTRAL SATELLITE IMAGERY THROUGH 28/0745Z UNDER FAIRLY CLEAR SKIES. HOWEVER THE GEOPHYSICAL INSTITUTE AT 27/2306Z REPORTED ASH TO FL260. CURRENTLY NO HOTSPOT CAN BE SEEN. NEXT ADVISORY: WILL BE ISSUED BY 2003AUG28/1400Z. NNNN