FVXX21 KWBC 230400 VOLCANIC ASH ADVISORY ISSUED: 2002OCT23/0400Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: MONTSERRAT . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2002/168 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. MONTSERRAT VOLCANO OBSERVATORY . ERUPTION DETAILS: ONGOING ASH VENTING. . OBS ASH DATE/TIME: 23/0315Z. . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL080 MOVING WEST AT 12 TO 18 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 23/0315Z DUE TO EXTENSIVE WEATHER CLOUDS. AN OCCASIONAL HOT SPOT CAN BE DETECTED IN SHORTWAVE IMAGERY. THE MONTSERRAT VOLCANO OBSERVATORY REPORTED A PYROCLASTIC FLOW AT 2100Z. ASH IS ESTIMATED TO AT LEAST FL080. . NEXT ADVISORY: WILL BE ISSUED BY 2002OCT23/1000Z. . NNNN