FVXX20 KWBC 120759 VOLCANIC ASH ADVISORY ISSUED: 2003SEP12/0800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/234 INFORMATION SOURCE: GOES-12 IMAGERY. GUAYAQUIL MWO SIGMET. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: EMISSION AT 11/0055Z OBS ASH DATE/TIME: 12/0715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/250 MOVING W 5-10 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. REMARKS: THE LATEST OBSERVATION OF ASH BY THE GEOPHYSICAL INSTITUTE WAS AT 12/0004Z. ASH IS ESTIMATED TO FL250 AND IS MOVING TOWARDS THE W AT 5 TO 10 KNOTS. ASH IS NOT OBSERVED IN SATELLITE IMAGERY DUE TO EXTENSIVE CLOUDS. NEXT ADVISORY: WILL BE ISSUED BY 2003SEP12/1400Z. NNNN