FVXX21 KWBC 121936 VOLCANIC ASH ADVISORY ISSUED: 2003NOV12/1930Z VAAC: WASHINGTON VOLCANO: COLIMA 1401-04 LOCATION: N1931W10337 AREA: MEXICO SUMMIT ELEVATION: 13451 FT (4100 M) ADVISORY NUMBER: 2003/57 INFORMATION SOURCE: GOES-12 IMAGERY. MEXICO CITY MWO. GFS MODEL WINDS FORECAST ERUPTION DETAILS: 1842Z EMISSION OF AN ASH AND STEAM MIX. OBS ASH DATE/TIME: 12/1915Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL180 MOVING W 5-15 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTS AN EMISSION OF ASH OR AN ASH AND STEAM MIX TO FL180 AT 1842Z. ASH WAS OBSERVED MOVING WEST. ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 1915Z BUT WEATHER CLOUDS WEST OF THE VOLCANO MIGHT BE HINDERING ASH DETECTION. NEXT ADVISORY: WILL BE ISSUED BY 2003NOV13/0130Z NNNN