FVXX20 KWBC 170400 VOLCANIC ASH ADVISORY ISSUED 0400 UTC 17 SEP 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-240 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: INFRARED AND MULTISPECTRAL SATELLITE IMAGERY. 17/0000 UTC SOUNDING FROM GUADELOUPE. THE MONTSERRAT VOLCANO OBSERVATORY. . ERUPTION DETAILS: EXPLOSION AROUND 17/0340 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTED AN EXPLOSION OCCURRED AROUND 17/0340 UTC WHICH PRODUCED A DENSE ASH CLOUD TO ABOUT FL100. AN UPDATED ADVISORY WILL BE SENT AS SOON AS SATELLITE IMAGERY BECOMES AVAILABLE. . TRAJECTORY: ASH FROM SUMMIT LEVEL TO FL100 WILL MOVE TOWARD THE WEST AT ABOUT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED AS SOON AS 17/0345 UTC SATELLITE IMAGERY IS 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. . CLARK . NNNN