FVXX20 KWBC 111618 VOLCANIC ASH ADVISORY-WATCH ISSUED: 2004OCT11/1630Z VAAC: WASHINGTON VOLCANO: ST. HELENS 1201-05 LOCATION: N4612W12211 AREA: US-WASHINGTON SUMMIT ELEVATION: 8363 FT (2549 M) ADVISORY NUMBER: 2004/024 INFORMATION SOURCE: CASCADES VOLCANO OBSERVATORY. GOES-10 AND GOES-12 INFRARED AND MULTISPECTRAL IMAGERY. REMARKS: NO EXPLOSIVE ERUPTION OR ASH IS CURRENTLY BEING OBSERVED OR REPORTED. THE VOLCANO OBSERVATORY REPORTS SEISMIC ACTIVITY REMAINS ELEVATED AND SUGGESTS THAT AN EXPLOSIVE ERUPTION WITH LITTLE OR NO WARNING IS POSSIBLE. THE WASHINGTON VAAC WILL CONTINUE TO MONITOR THE AREA AND ISSUE VOLCANIC ASH WATCH ADVISORIES EVERY 24 HOURS. IF ASH IS OBSERVED OR REPORTED A VOLCANIC ASH ADVISORY WILL BE ISSUED AS SOON AS POSSIBLE. . EFFECTIVE OCT 28 2004...THE HEADER IDENTIFICATION FOR THIS PRODUCT WILL CHANGE FROM KWBC TO KNES. . NEXT ADVISORY: WILL BE ISSUED BY 2004OCT12/1630Z. . NNNN