FVXX20 KWBC 050700 VOLCANIC ASH ADVISORY ISSUED: 2001JAN05/0700Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/11 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. AVIATION MODEL UPPER WINDS FORECAST. . ERUPTION DETAILS: FAINT ASH PLUME PRODUCED BY ROCKFALLS. . DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 05/0615Z. HOWEVER LOW LEVEL THIN ASH CAN USUALLY BE SEEN ONLY DURING THE DAYTIME WITH VISIBLE SATELLITE IMAGERY AND IS DIFFICULT TO SEE AT NIGHT WITH JUST INFRARED AND MULTISPECTRAL IMAGERY. ON JANUARY 4 AN ASH PLUME TO FL080 WAS OBSERVED EXTENDING FROM THE SUMMIT TOWARD THE NORTH NORTHWEST. SHORTWAVE INFRARED IMAGERY CONTINUES TO SHOW A HOTSPOT OVER THE VOLCANO SUMMIT. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH AT ABOUT FL080 WOULD MOVE TOWARDS THE NORTH-NORTHWEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 05/1300Z. . 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. . NNNN