FVXX21 KWBC 112357 VOLCANIC ASH ADVISORY ISSUED: 2003MAY11/2355Z VAAC: WASHINGTON VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: CARIBBEAN SUMMIT ELEVATION: 3000 FT (915 M) ADVISORY NUMBER: 2003/507 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: EMISSION OF GASES AND ASH. OBS ASH DATE/TIME: 11/2315Z. OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL050 WEST AT 15-20 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: ASH IS NOT IDENTIFIABLE FROM SATELLITE DATA AS WEATHER CLOUDS CONTINUE TO OBSCURE THE AREA. THE MONTSERRAT VOLCANO OBSERVATORY EARLIER REPORTED THAT PYROCLASTIC ACTIVITY CONTINUES TO PRODUCE A PLUME AT OR BELOW FL050. ANALYST..RUMINSKI NEXT ADVISORY: WILL BE ISSUED BY 2003MAY12/0600Z. NNNN