FVXX20 KWBC 200700 VOLCANIC ASH ADVISORY ISSUED: 2001JAN20/0700Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/71 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 21/0000Z GUADELOUPE SOUNDING. . ERUPTION DETAILS: ASH PLUME PRODUCED BY ROCKFALLS. . DETAILS OF ASH CLOUD: NO ASH COULD BE DISCERNED IN SATELLITE IMAGERY THROUGH 0615Z. ASH WAS DETECTED IN DAY TIME VISIBLE IMAGERY ESTIMATED TO BE BELOW FL070. SUCH LOW LEVEL ASH IS OFTEN NOT SEEN INFRARED OR MULTISPECTRAL IMAGERY. . TRAJECTORY: ASH BELOW FL070 WOULD MOVE TOWARD THE WEST AT ABOUT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 20/1300Z. . 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