FVXX20 KWBC 210700 VOLCANIC ASH ADVISORY ISSUED: 2001JAN21/0700Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/75 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 21/0000Z GUADELOUPE SOUNDING. AVIATION MODEL FORECAST WINDS. . ERUPTION DETAILS: ASH PLUME PRODUCED BY ROCKFALLS. . DETAILS OF ASH CLOUD: NO ASH WAS DETECTED IN SATELLITE IMAGERY THROUGH 0615Z. A LOW LEVEL ASH PLUME MOVING TO THE WEST WAS SEEN IN DAY TIME VISIBLE IMAGERY AND WAS ESTIMATED AT OR BELOW FL070. SUCH LOW LEVEL ASH IS NORMALLY NOT DISCERNIBLE IN INFRARED OR MULTISPECTRAL IMAGERY. . TRAJECTORY: ASH BELOW FL070 WOULD MOVE TOWARD THE WEST AT ABOUT 15 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 21/1300Z. . 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