FVXX20 KWBC 150100 VOLCANIC ASH ADVISORY ISSUED: 2001JAN15/0100Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/50 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. AVIATION MODEL FORECAST. . ERUPTION DETAILS: ROCKFALLS PRODUCING LOW LEVEL ASH. . DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN GOES-8 INFRARED IMAGERY. HOWEVER...A LOW LEVEL ASH CLOUD IS MOST LIKELY PRESENT AND BETWEEN FL080 AND FL100. THE LAST VISIBLE IMAGES OF THE DAY SHOWED THIS THICK ASH PLUME MOVING NORTH-NORTHWEST FROM THE ISLAND. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH BETWEEN FL080 AND FL100 TO MOVE NORTH-NORTHWEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 15/0700Z. . 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. . HUGHES . NNNN