FVXX20 KWBC 111359 VOLCANIC ASH ADVISORY ISSUED: 2003SEP11/1400Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/231 INFORMATION SOURCE: GOES-12 IMAGERY. GUAYAQUIL MWO SIGMET. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: EMISSION AT 11/0055Z OBS ASH DATE/TIME: 11/1315Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/260 MOVING W TO SW 5-10 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. REMARKS: A LATEST SIGMET FROM THE GUAYAQUIL MWO INDICATES THAT THE GEOPHYSICAL INSTITUTE OBSERVED ASH AT 11/1316Z. PREVIOUS SIGMET OBSERVED ASH TO FL260. ASH CAN NOT BE SEEN IN THE CURRENT SATELLITE IMAGERY AS THERE ARE EXTENSIVE CLOUDS PRESENT. TEB NEXT ADVISORY: WILL BE ISSUED BY 2003SEP11/2000Z. NNNN