FVXX20 KWBC 280740 VOLCANIC ASH ADVISORY ISSUED: 2000DEC28/0740Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2000/344 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 28/0000Z GUADELOUPE UPPER AIR SOUNDING. . ERUPTION DETAILS: FAINT ASH PLUME PRODUCED BY ROCKFALLS. . DETAILS OF ASH CLOUD: SATELLITE IMAGERY THROUGH 28/0715Z SHOWS NO CURRENT ASH PLUME. LOW LEVEL ASH PLUMES ARE NOTORIOUSLY DIFFICULT TO DETECT WITHOUT VISIBLE IMAGERY. HOT SPOT ACTIVITY HAS BEEN DETECTED IN MULTISPECTRAL AND SHORTWAVE INFRARED IMAGERY OVER THE PAST FEW HOURS. . TRAJECTORY: ANY ASH UP TO FL070 WOULD MOVE TOWARD THE NORTHWEST AT ABOUT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 28/1400Z. . 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. . . NNNN