FVXX20 KWBC 031945 VOLCANIC ASH ADVISORY ISSUED: 2004MAR03/1945z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: N1643W06211 AREA: MONTSERRAT . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2004/001 INFORMATION SOURCE: MONTSERRAT VOLCANIC OBSERVATORY. 12Z GUADELOUPE UPPER LEVEL SOUNDING. . ERUPTION DETAILS: MAJOR ERUPTION AT 03/1850Z. . OBS ASH DATE/TIME: 03/1915Z. . OBS ASH CLOUD: SFC/FL200 N1645W06214 - N1637W06223 - N1630W06218 N1634W06208 - N1641W067209. ASH IS MOVING SW AT 20-25KT. . FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL . REMARKS: AFWA FOR WASHINGTON VAAC. THE MONTSERRAT VOLCANO OBSERVATORY REPORTS AN EMISSION AT 1850Z. 1200Z UPPER LEVEL SOUNDING WOULD PLACE THE ASH AT ABOUT FL200. AT 1915Z THE ASH AREA WAS 15 NM LONG AND 10 NM WIDE. NEXT ADVISORY: WILL BE ISSUED BY 2004MAR04/0200z . .