FVXX20 KWBC 170730 VOLCANIC ASH ADVISORY ISSUED 0730 UTC 17 SEP 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-242 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: INFRARED AND MULTISPECTRAL SATELLITE IMAGERY. 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. NO ASH WAS DETECTED IN SATELLITE IMAGERY THROUGH 17/0702 UTC AS CONVECTIVE CLOUDS PREVAIL IN THE AREA SURROUNDING THE ISLAND. . TRAJECTORY: ANY 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 17/1330 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