FVXX20 KWBC 210451 VOLCANIC ASH ADVISORY ISSUED: 2003OCT21/0500Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/393 INFORMATION SOURCE: GOES-12 IMAGERY. GUAYAQUIL MWO SIGMETS. GEOPHYSICAL INSTITUTE REPORT. ERUPTION DETAILS: CONTINUED ASH AND STEAM EXHALATIONS. OBS ASH DATE/TIME: 20/0415Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE IN SATELLITE DATA. WINDS SFC/FL200 MOVING W 15-20 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: ASH CANNOT BE SEEN IN IMAGERY ALTHOUGH THERE ARE EXTENSIVE CLOUDS PRESENT. NEXT ADVISORY: WILL BE ISSUED BY 2003OCT21/1100Z. NNNN