FVXX21 KWBC 181830 VOLCANIC ASH ADVISORY ISSUED: 2001JUN18/1830Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/167 . INFORMATION SOURCE: MONTSERRAT VOLCANO OBSERVATORY...GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. . ERUPTION DETAILS: THE LOW-LEVEL ASH EMISSIONS NOTED TO BE INCREASING AND WITH SOME GREATER DENSITY. . DETAILS OF ASH CLOUD: COORDINATION WITH THE MONTSERRAT VOLCANO OBSERVATORY (MVO) CONFIRMS OBSERVATIONS FROM GOES-8 VISIBLE SATELLITE IMAGERY THAT LOW-LEVEL ASH IS INCREASING FROM THE SUMMIT. THE MVO REPORTS MODERATE ROCKFALL ACTIVITY IS NOW PRODUCING ASH TO APPROXIMATELY FL070. THE VISIBLE IMAGERY THORUGH 18/1815Z IS SHOWING AN INCREASINGLY DISTINCT PLUME AND THERE IS SOME DETECTION NOTED IN MULTISPECTRAL IMAGERY. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL070 WILL MOVE WEST TO NOETHWEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED ASAP AND WILL CONTAIN A GRAPHICAL ANALYSIS. . 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. . ORRISON . NNNN