FVXX21 KWBC 121530 VOLCANIC ASH ADVISORY ISSUED: 2004JAN12/1530Z VAAC: WASHINGTON VOLCANO: SANTA MARIA 1402-03 LOCATION: N1445W09133 AREA: GUATEMALA SUMMIT ELEVATION: 12375 FT (3772 M) ADVISORY NUMBER: 2004/007 INFORMATION SOURCE: GOES 12 IMAGERY GFS MODEL WINDS FORECAST ERUPTION DETAILS: EXHALATIONS STARTING ABOUT 12/1430Z OBS ASH DATE/TIME: 12/1445Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL150 MOVING NW 5-10 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: A SIGMET FROM TEGUCIGALPA INDICATES THE VOLCANO HAD AN EXHALATION AROUND 12/1430Z. A VERY SMALL POSSIBLE PLUME IS OBSERVED IN THE CURRENT IMAGERY THROUGH 12/1445Z. THIS PLUME WAS OBSERVED MOVING OFF TO THE NORTHWEST. BASED ON THIS MORNINGS GFS MODEL WINDS FORECAST WE BELIEVE THE ASH IS SOMEWHAT LOWER..FL150..THAN THE FL200 STATED IN THE CURRENT SIGMET....WALTER NEXT ADVISORY: WILL BE ISSUED BY 2004JAN12/2130Z NNNN