FVXX20 KWBC 1311235 VOLCANIC ASH ADVISORY ISSUED: 2001DEC13/1235Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/270 . INFORMATION SOURCE: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. MONTSERRAT VOLCANO OBSERVATORY. 12Z GUADELOUPE UPPER AIR WINDS REPORT. . ERUPTION DETAILS: ASH REPORTED AT 13/1225Z. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTED AN INCREASE IN VOLCANIC ACTIVITY PRODUCING SOME THICK LOW LEVEL ASH MOVING TO THE WEST. SATELLITE IMAGERY IS ONLY AVAILABLE THROUGH 1215Z. HOWEVER THERE ARE SOME LOW AND MIDDLE LEVEL CLOUDS IN THE VICINITY OF THE VOLCANO. . TRAJECTORY: ASH REPORTED MOVING WEST IS ESTIMATED TO BE BELOW FL100 AND AROUND 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: WILL BE ISSUED BY 13/1400Z. . . NNNN