FVXX20 KWBC 280158 VOLCANIC ASH ADVISORY ISSUED: 2003AUG28/0200Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/176 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. ERUPTION DETAILS: ASH ERUPTION STARTED AT 20/1745Z. OBS ASH DATE/TIME: 28/0145Z. OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/260 MOVING WEST AT 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. REMARKS: THE GEOPHYSICAL INSTITUTE AT 27/2306Z REPORTED ASH AT FL260. A HOTSPOT IS VISIBLE IN SHORTWAVE IMAGERY. NEXT ADVISORY: WILL BE ISSUED BY 2003AUG28/0800Z. NNNN