FVXX20 KWBC 151835 VOLCANIC ASH ADVISORY ISSUED: 2003DEC15/1830Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/610 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: ASH EMISSIONS AT 15/1702Z OBS ASH DATE/TIME: 15/1815Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL230 MOVING TO W 10-15 KNOTS FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: THE GEOPHYSICAL INSTITUTE INDICATES THAT AN ERUPTION OCCURRED AT 15/1702 AND THAT ASH WAS HEADING WEST. THERE IS A SLIGHT INDICATION OF POSSIBLE ASH MOVING WEST IN SATELLITE IMAGERY AT 15/1815Z HOWEVER DUE TO CLOUDS ACROSS THE REGION ASH COULD NOT BE CONFIRMED. WE WILL CONTINUE TO MONITOR AND ADVISE AS NEEDED...GALLINA/KIBLER NEXT ADVISORY: WILL BE ISSUED BY 2003DEC16/0030Z NNNN