FVXX20 KWBC 210050 VOLCANIC ASH ADVISORY ISSUED: 2001JAN21/0050Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/74 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WINDS FORECAST FROM AVIATION MODEL. . ERUPTION DETAILS: ROCKFALLS PRODUCING LOW LEVEL ASH. . DETAILS OF ASH CLOUD: NO ASH COULD BE DETECTED IN SATELLITE IMAGERY THROUGH 0015Z. ASH SEEN IN THE VISIBLE IMAGERY DURING THE DAY WAS ESTIMATED TO BE BELOW FL070. . TRAJECTORY: ASH BELOW FL070 WOULD MOVE TOWARD THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 21/0700. . 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. . BROWN . NNNN