FVXX20 KWBC 170420 VOLCANIC ASH ADVISORY ISSUED 0420 UTC 17 SEP 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-241 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: THE MONTSERRAT VOLCANO OBSERVATORY. 17/0000 UTC SOUNDING FROM GUADELOUPE. . 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. THE LATEST SATELLITE IMAGERY IS 17/0332 UTC AND DUE TO THE GOES-8 ECLIPSE SCHEDULE..SUBSEQUENT IMAGERY WILL NOT BE AVAILABLE UNTIL 17/0645 UTC. AN UPDATE ADVISORY WILL BE SENT AS SOON AS THIS SATELLITE IMAGERY IS 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 BY 17/0715 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. . CLARK . NNNN