FVXX20 KWBC 020630 VOLCANIC ASH ADVISORY ISSUED: 2001MAR02/0630Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . ADVISORY NUMBER: 2001/142 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. ERUPTION DETAILS: OCCASIONAL ROCKFALLS PRODUCING LOW LEVEL ASH. . DETAILS OF ASH CLOUD: ASH IS NOT SEEN IN INFRARED AND CONVENTIONAL MULTISPECTRAL IMAGERY THROUGH 02/0415Z PROBABLY BECAUSE OF THE DIFFICULTY OF SEEING THIN LOW ASH AT NIGHT. HOWEVER AN EXPERIMENTAL MULTISPECTRAL TECHNIQUE SHOWS A POSSIBLE VERY THIN AREA OF ASH FROM AN EARLIER EMISSION. THIS ROUGHLY CIRCULAR AREA IS CENTERED AT ABOUT 1630N 6300W AND HAS A DIAMETER OF ABOUT 40 KM (22 NMI). ANY ASH IS ESTIMATED TO BE BELOW FL100. SHORTWAVE INFRARED IMAGERY SHOWS AN INTERMITTENT HOTSPOT AT THE VOLCANO SUMMIT. . TRAJECTORY: ASH BELOW FL100 WILL MOVE TOWARDS THE WEST OR SOUTHWEST AT ABOUT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 02/1230Z. . 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