FVXX20 KWBC 120400 VOLCANIC ASH ADVISORY ISSUED: 2001JAN12/0400Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/38 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 00OOZ UPPER AIR DATA FROM GUADELOUPE. . ERUPTION DETAILS: OCCASIONAL ROCKFALLS THAT PRODUCE LOW LEVEL ASH. . DETAILS OF ASH CLOUD: SHORTWAVE IMAGERY CONTINUES TO SHOW A HOTSPOT OVER THE VOLCANO BUT NO PLUME CAN BE DETECTED. THE LAST VISIBLE IMAGE AT 2115Z SHOWED A PLUME EXTENDING TO THE WEST AND NORTHWEST FROM THE VOLCANO. ASH IS ESTIMATED BELOW FL100. TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR BELOW FL100 TO MOVE TOWARDS THE WEST AND NORTHWEST AT 5 TO 10 KTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 12/1000Z. . 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. . KARST . NNNN