FVXX20 KWBC 051642 VOLCANIC ASH ADVISORY ISSUED: 2003OCT05/1700Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/326 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: 05/1615Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/230 MOVING W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: VISIBLE IMAGERY SHOWS CLOUDS OVER THE VOLCANO MAKING IT DIFFICULT TO DETECT ANY ASH. THE LATEST OBSERVATION OF ASH OVER THE VOLCANO BY THE GEOPHYSICAL INSTITUTE WAS AT 1010Z. UPPER AIR MODEL WINDS SUGGEST THAT ANY ASH TO FL230 SHOULD MOVE TOWARDS THE W AT 10-15 KNOTS. NEXT ADVISORY: WILL BE ISSUED BY 2003OCT05/2300Z. NNNN