FVXX20 KWBC 010630 VOLCANIC ASH ADVISORY ISSUED: 2001MAR01/0615Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . ADVISORY NUMBER: 2001/138 INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. ERUPTION DETAILS: OCCASIONAL ROCKFALLS PRODUCING A LOW LEVEL ASH PLUME. . DETAILS OF ASH CLOUD: ASH IS NOT SEEN IN SATELLITE IMAGERY THROUGH 01/0415Z PROBABLY BECAUSE THIN LOW LEVEL ASH PLUMES ARE DIFFICULT TO SEE AT NIGHT. THE ASH MIGHT AGAIN BE SEEN AFTER DAYLIGHT WHEN VISIBLE SATELLITE IMAGERY BECOMES AVAILABLE. A HOTSPOT IS SEEN IN SHORTWAVE INFRARED IMAGERY. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BELOW FL100 WOULD MOVE TOWARD THE SOUTH OR WEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 01/1230Z. . 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