FVXX21 KNES 131431 VOLCANIC ASH ADVISORY ISSUED: 2005AUG13/1431Z VAAC: WASHINGTON VOLCANO: REVENTADOR 1502-01 LOCATION: S0004W07740 AREA: ECUADOR SUMMIT ELEVATION: 11686 FT (3562 M) ADVISORY NUMBER: 2005/180 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12. GFS MODEL WINDS. ERUPTION DETAILS: ASH OBSERVED AT 1300Z OBS ASH DATE/TIME: 13/1345Z OBS ASH CLOUD: SFC/FL150 4NM WIDE LINE BETWEEN S0004W07816 - S0005W07739. ASH IS MOVING W 5-10 KNOTS. FCST ASH CLOUD +6H: 13/2000Z NO ASH EXP. FCST ASH CLOUD +12H: 14/0200Z FCST ASH CLOUD +18H: 14/0800Z REMARKS: A SIGMET INDICATES THAT AT 1300Z THE GEOPHYSICAL INSTITUTE OBSERVED PROBABLE ASH MOVING WESTWARD. A FAINT AREA OF ASH CAN BE SEEN IN VISIBLE SATELLITE IMAGERY AND IT APPEARS TO BE A NARROW PLUME THAT HAS NOW DETACHED FROM THE VOLCANO. IT HAS BECOME FAINTER BETWEEN 1315Z AND 1345Z. ... NEXT ADVISORY: WILL BE ISSUED BY 2005AUG13/2030Z NNNN