FVXX20 KNES 231615 VOLCANIC ASH ADVISORY ISSUED: 20070323/1558Z VAAC: WASHINGTON VOLCANO: REVENTADOR 1502-01 LOCATION: S0004 W07740 AREA: ECUADOR SUMMIT ELEVATION: 11686 FT (3562 M) ADVISORY NUMBER: 2007/004 INFORMATION SOURCE: GOES-12. GFS WINDS. SIGMET ERUPTION DETAILS: POSSIBLE ASH EMISSION AT OR BEFORE 1530Z OBS ASH DATE/TIME: 23/1530Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL150 MOVING TO W 5-15 KNOTS. FCST ASH CLOUD +6H: 23/2130Z FCST ASH CLOUD +12H: 24/0330Z FCST ASH CLOUD +18H: 24/0930Z REMARKS: A GUAYAQUIL MWO SIGMET CITES A 1530Z GEOPHYSICAL INSTITUTE OBSERVATION OF ASH WITH THE HEIGHT NOT INDICATED. DENSE WEATHER CLOUDS PREVENT OBSERVATION OF THE ASH BY SATELLITE. ... NEXT ADVISORY: WILL BE ISSUED BY 20070323/2200Z