FVXX20 KWBC 201555 VOLCANIC ASH ADVISORY ISSUED: 2003NOV20/1550Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/513 INFORMATION SOURCE: GOES-12 IMAGERY. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: OUTGASING WITH LIGHT WITH LIGHT ASH SINCE 20/12Z OBS ASH DATE/TIME: 20/1445Z OBS ASH CLOUD: SFC/FL200 AREA OF ASH CLOUD LOCATED BETWEEN S0128W07826 S0132W7827 ASH MOVING SOUTHWEST AT 10 KNOTS FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: AFWA FOR WASHINGTON VAAC. UPDATE TO BULLETIN SOONER THAN SCHEDULED DUE TO PLUME DIRECTION CHANGEMARTINEZ/PIATT NEXT ADVISORY: WILL BE ISSUED BY 2003NOV20/2155Z NNNN