FVXX20 KWBC 150520 VOLCANIC ASH ADVISORY ISSUED 0520 UTC 15 SEP 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-232 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: INFRARED AND MULTISPECTRAL SATELLITE IMAGERY. 15/0000 UTC GUADELOUPE UPPER AIR SOUNDING. MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: ERUPTION AROUND 500 UTC. PYROCLASTIC FLOW AROUND 1900 UTC AND CONTINUED LOW LEVEL ASH AND STEAM EMISSIONS. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY HAS REPORTED AN EXPLOSIVE ERUPTION OF THE VOLCANO AROUND 0500 UTC. THE ASH PLUME HEIGHT WAS REPORTED TO BE BETWEEN FL080 AND FL100 MOVING WEST NORTHWEST. SATELLITE IMAGERY IS UNAVAILABLE UNTIL THE 0645 UTC IMAGE DUE TO ECLIPSE. TRAJECTORY: ASH AT OR BELOW FL100 IS EXPECTED TO MOVE TOWARD THE WEST NORTHWEST AT ABOUT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 15/1100 UTC OR SOONER IF ADDITIONAL INFORMATION BECOMES AVAILABLE. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN