FVXX23 WBC 281815 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1815 UTC 28 OCTOBER 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-241 WEST INDIES 16.7N 62.2W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY..GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY AND GUADELOUPE 28/1200 UTC UPPER AIR SOUNDING. . ERUPTION DETAILS: ERUPTION OCCURRED AT 28/1651 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY HAS INDICATED AN ERUPTION AT THE SOUFRIERE HILLS VOLCANO. GOES 8 VISIBLE MULTISPECTRAL AND INFRARED SATELLITE IMAGERY THROUGH 1745 UTC INDICATES AN ASH CLOUD THAT CONTINUES TO PUSH TO THE WEST FROM THE SUMMIT. AFTER FURTHER COORDINATION WITH THE MONTSERRAT VOLCANO OBSERVATORY AND ANALYSIS OF SATELLITE IMAGERY THE ASH APPEARS TO NOW HAVE REACHED FL150. ASH EXTENDS FROM THE SUMMIT TO 16.7N 62.6W AND 7.5 KM EITHER SIDE OF THIS LINE. . TRAJECTORY: ASH IS MOVING TO THE WEST AT 20 TO 25 KNOTS FL150. SATELLITE IMAGERY CONFIRMS THIS MOTION. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS http://www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 28/2300 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. ORRISON . NNNN