FVXXQ0 KWBC 271400 VOLCANIC ASH ADVISORY ISSUED: 2003AUG27/1400z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/174 INFORMATION SOURCE: GOES-12 IMAGERY. DMSP IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: ASH ERUPTION STARTED AT 20/1745z. OSS ASH DATE/TIME: 27/1245z. OBS ASH CLOUD: FL1OO/270 S0128W07826 S0128W07826 S0043WO7849 S0058W08056 S0157W08031 S0136W07922 MOVING WEST 15-20 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. REMARKS: AFWA FOR WASHINGTON VAAC. SATELLITE IMAGERY THROUGH 27/1245Z SHOWS A LARGE AREA OF THIN ASH TO THE WEST OF THE VOLCANO. NEXT ADVISORY: WILL BE ISSUED By 2003AUG27/2000z NNNN