FVXX20 KWBC 051045 VOLCANIC ASH ADVISORY ISSUED: 2003OCT05/1100Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/325 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: 05/1015Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/230 MOVING SW 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: THE LATEST OBSERVATION OF ASH OVER THE VOLCANO BY THE GEOPHYSICAL INSTITUTE WAS AT 1010Z. CLOUDS OVER THE VOLCANO MAKE IT DIFFICULT TO DETECT ASH IN SATELLITE IMAGERY. UPPER AIR MODEL WINDS SUGGEST THAT ANY ASH TO FL230 SHOULD MOVE TOWARDS THE SW AT 10-15 KNOTS. NEXT ADVISORY: WILL BE ISSUED BY 2003OCT05/1700Z. NNNN