FVXX20 KWBC 181859 VOLCANIC ASH ADVISORY ISSUED: 2004OCT18/1900Z VAAC: WASHINGTON VOLCANO: ST. HELENS 1201-05 LOCATION: N4612W12211 AREA: US-WASHINGTON SUMMIT ELEVATION: 8363 FT (2549 M) ADVISORY NUMBER: 2004/031 INFORMATION SOURCE: CASCADES VOLCANO OBSERVATORY. GOES-10 AND GOES-12 INFRARED AND MULTISPECTRAL IMAGERY. REMARKS: AFTER DISCUSSION WITH AUTHORITIES AT THE CASCADES VOLCANO OBSERVATORY WE ARE DISCONTINUING THE WATCH FOR MOUNT SAINT HELENS. THERE CONTINUES TO BE LOW LEVEL WITHIN CALDERA ACTIVITY AT THE VOLCANO HOWEVER IT IS NOT POSING AN EMINENT THREAT TO AVIATION. A NOTICE TO AVIATION WITHIN 5 NAUTICAL MILES AND BELOW FL130 SHOULD CONTINUE. IF THREAT CONDITIONS RISE A WATCH WILL AGAIN BE ISSUED. THE WASHINGTON VAAC WILL CONTINUE TO MONITOR THE AREA AND 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. . NO FURTHER ADVISORIES. . NNNN