FVXX20 KWBC 202257 VOLCANIC ASH ADVISORY ISSUED: 2003SEP20/2300Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/265 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: EMISSION AT 19/1004Z OBS ASH DATE/TIME: 20/2215Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/230 MOVING SW-W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. REMARKS: ASH IS NOT VISIBLE IN SATELLITE IMAGERY DUE TO WEATHER CLOUDS ACROSS THE REGION. THE GEOPHYSICAL INSTITUTE EVENING REPORT NOTED CONTINUED ACTIVITY WITH LIGHT ASH AMOUNTS MOVING SOUTHWEST. MODEL DATA ESTIMATES WINDS TO THE WEST. THE LAST AIRCRAFT REPORT INDICATE THAT ASH AROUND FL200 MOVING SW. NEXT ADVISORY: WILL BE ISSUED BY 2003SEP21/0500Z. NNNN