FVXX20 KWBC 151310 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1310 UTC 15 JAN 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-016 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE ... INFRARED...AND MULTISPECTRAL IMAGERY. MONTSERRAT VOLCANO OBSERVATORY. 0000 UTC GUADELOUPE UPPER AIR SOUNDING. . ERUPTION DETAILS: ERUPTION OCCURRED APPROXIMATELY 15/1230 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTED AN ERUPTION OF SOUFRIERE HILLS VOLCANO WITH ASH REPORTED UP TO AT LEAST FL200. THE OBSERVATORY INDICATED THAT THE EVENT DURATION WAS AT LEAST TEN MINUTES (STILL ONGOING AT THE TIME OF THE CALL) AND THAT THEY SUSPECTED A FAIRLY MAJOR DOME COLLAPSE WAS INVOLVED. SATELLITE IMAGERY THROUGH 1245 UTC SHOWS ONLY A SLIGHT ENHANCEMENT IN THE IMMEDIATE VICINITY OF THE VOLCANO. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ASH UP TO FL100 WOULD MOVE WEST NORTHWEST AT 15 TO 20 KTS. ASH BETWEEN FL100 AND FL200 WOULD MOVE NORTHEAST AT 5 TO 10 KTS. ASH ABOVE FL200 WOULD MOVE EAST NORTHEAST. . THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS www.ssd.noaa.gov/VAAC/messages.html (all lower case except /VAAC/) . OUTLOOK: SEE LATEST SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 15/1900 UTC OR SOONER IF ADDITIONAL INFORMATION BECOMES AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN