FVXX20 KWBC 041555 VOLCANIC ASH ADVISORY ISSUED: 2003OCT04/1600Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/321 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: SERIES OF EMISSIONS STARTING AT 21/2345Z OBS ASH DATE/TIME: 04/1515Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/200 MOVING W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: THE MOST RECENT KNOWN ASH OBSERVATION WAS AT 04/0817Z WHEN THE GEOPHYSICAL INSTITUTE OBSERVED AN ASH CLOUD. THRU 1515Z NO HOTSPOT NOR ASH COULD BE SEEN IN VISIBLE INFRARED OR MULTISPECTRAL SATELLITE IMAGERY...GALLINA NEXT ADVISORY: WILL BE ISSUED BY 2003OCT04/2200Z. NNNN