FVXX21 KWBC 111930 VOLCANIC ASH ADVISORY ISSUED 1930 UTC 11 OCT 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-272 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED...AND MULTISPECTRAL IMAGERY. 11/1200 UTC UPPER AIR SOUNDING OUT OF GUADELOUPE. . ERUPTION DETAILS: INCREASED ASH AND STEAM EMISSIONS. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY AT 1845 UTC SHOWS AN ASH PLUME EXTENDING FROM THE SUMMIT TOWARD THE WEST TO THE POINT 1643N 6240W. THE PLUME IS ABOUT 50 KM (27 NMI) LONG AND UP TO 10 KM (5 NMI) WIDE. ASH IS ESTIMATED TO BE BELOW FL100. . TRAJECTORY: ASH IS MOVING TOWARD THE WEST AT ABOUT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 12/0130 UTC. . 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