FVXX20 KWBC 112100 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1800 UTC 11 JAN 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-004 WEST INDIES 16.7N 62.2W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000FT (915M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. 1200 UTC GUADELOUPE SOUNDING. MONTSERRAT VOLCANO OBSERVATORY REPORT . ERUPTION DETAILS: ERUPTED ON JAN 11 AT 2033 UTC. . DETAILS OF ASH CLOUD; THE MONTSERRAT VOLCANO OBSERVATORY REPORTED A LOW LEVEL ERUPTION OF THE SOUFRIERE HILLS VOLCANO FOR 1 MINUTE TO ABOUT FL100. ASH IS NOT YET VISIBLE ON SATELLITE IMAGERY BUT A SHOT SPOT IS VISIBLE IN SHORTWAVE INFRARED IMAGERY. ASH WAS REPORTED MOVING WEST. . TRAJECTORY: THE 1200 UTC GUADELOUPE SOUNDING INDICATES THAT ASH AT FL100 WOULD MOVE TO THE WEST AT 10-15 KT. . 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. . NEXT ADVISORY WILL BE ISSUED AROUND 12/03000 UTC OR SOONER IF ADDITIONAL INFORMATION BECOMES AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN