FVXX20 KWBC 250700 VOLCANIC ASH ADVISORY ISSUED: 2001SEP25/0700Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/216 . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. SIGMET 1 FROM PIARCO. 00Z UPPER AIR WINDS FROM GUADELOUPE. . ERUPTION DETAILS: LOW LEVEL ASH OBSERVED. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY AT 0645Z DOES NOT INDICATE ANY ASH...HOWEVER THERE IS A REPORT OF ASH TO FL050 MOVING WEST AT 20 KNOTS. THESE LOW LEVEL ASH PLUMES FROM MONTSERRAT CAN NOT TYPICALLY BE DETECTED BY THE LOW RESOLUTION INFRARED SENSORS. TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL050 WOULD MOVE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 25/1300Z. . INTERNET URLS... MESSAGE LISTSERV WWW.SSD.NOAA.GOV/VAAC/SUBSCRIBE.HTML MESSAGES GRAPHICS AND IMAGERY WWW.SSD.NOAA.GOV/VAAC/WASHINGTON.HTML (ALL LOWERCASE EXCEPT /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . HUGHES . NNNN