FVXX20 KWBC 151757 VOLCANIC ASH ADVISORY ISSUED: 2003OCT15/1800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/370 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: CONTINUED ASH AND GAS EMISSIONS. OBS ASH DATE/TIME: 15/1715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/230 MOVING NW 10 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: ASH CAN NOT BE SEEN IN THE CURRENT SATELLITE IMAGERY THROUGH 15/1715Z. THE ASH THAT WAS VISIBLE EARLIER APPEARS TO HAVE DISSIPATED....WALTER NEXT ADVISORY: WILL BE ISSUED BY 2003OCT16/0000Z NNNN