FVXX21 KWBC 071800 VOLCANIC ASH ADVISORY ISSUED: 2003MAR07/1800Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 1401-09 LOCATION: N1901W09837 AREA: MEXICO SUMMIT ELEVATION: 17930 FT (5465 M) ADVISORY NUMBER: 2003/065 INFORMATION SOURCE: GOES-8 IMAGERY. UPPER AIR SOUNDING. MEXICO CITY MWO. CENAPRED VOLCANO CAMERA. ERUPTION DETAILS: ERUPTION AT ABOUT 1100Z. OBS ASH DATE/TIME: 07/1715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL220 MOVING E 20-25 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: MULTISPECTRAL SATELLITE IMAGERY SHOWS AN AREA OF ASH HAS MOVED EAST AND HAS DISSIPATED ABOUT 70-75 NM FROM THE SUMMIT. ASH IS NOW TOO THIN TO BE DETECTED IN THE SATELLITE IMAGERY. HOWEVER...MULTISPECTRAL IMAGERY DOES CONTINUE TO SHOW A WEAK HOTSPOT SIGNATURE AT THE SUMMIT. CENAPRED VOLCANO CAM SHOWS OCCASIONAL WEAK EXHALATIONS. TEB NEXT ADVISORY: WILL BE ISSUED BY 2003MAR08/0000Z NNNN