FVXX20 KWBC 161747 VOLCANIC ASH ADVISORY ISSUED: 2003OCT16/1800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/374 INFORMATION SOURCE: GOES-12 IMAGERY. GEOPHYSICAL INSTITUTE. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: CONTINUED ASH AND GAS EMISSIONS. OBS ASH DATE/TIME: 16/1715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/250 NW 0 TO 10 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: ASH IS NO LONGER VISIBLE IN SATELLITE IMAGERY. A REPORT RECEIVED FROM KLM AIRLINES SHORTLY BEFORE 1500Z CONFIRMED THAT NO ASH WAS VISIBLE OVER THE SUMMIT OR NEARBY. THE GEOPHYSICAL INSTITUTE REPORTED ASH OVER THE VOLCANO AT 1637Z. SINCE 1500Z ONLY INTERMITTENT HOTSPOT ACTIVITY HAS BEEN NOTED IN SATELLITE IMAGERY THROUGH 1715Z. NEXT ADVISORY: WILL BE ISSUED BY 2003OCT17/0000Z NNNN