FVXX20 KWBC 250120 VOLCANIC ASH ADVISORY ISSUED: 2001FEB25/0120Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . ADVISORY NUMBER: 2001/121 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. MONTSERRAT VOLCANO OBSERVATORY. 1200Z GUADELOUPE UPPER AIR SOUNDING. PILOT REPORT. . ERUPTION DETAILS: CONTINUAL ROCKFALLS PRODUCING A STEADY LOW LEVEL ASH PLUME. . DETAILS OF ASH CLOUD: SCATTERED CIRRUS CLOUDS ARE OBSCURING ANY CURRENT LOW LEVEL ASH PLUME. LOW LEVEL PLUMES ARE NOTORIOUSLY DIFFICULT TO SEE IN INFRARED AND MULTISPECTRAL IMAGERY. A HOT SPOT AT THE SUMMIT WAS NOTED IN IMAGERY AROUND 24/2145Z BUT HAS NOT BEEN NOTICED IN MORE RECENT IMAGERY. . TRAJECTORY: ANY ASH UP TO FL100 WOULD MOVE TOWARD THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 25/0730Z. . 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