FVXX20 KWBC 251200
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1200 UTC 25 APR 1999 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 99-119   WEST INDIES 16.72N 62.18W
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BACKGROUND:    SOUFRIERE HILLS MONTSERRAT (1600-05)
               SUMMIT HEIGHT 3000 FT (915 M)
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SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY. 0000 UTC
GUADELOUPE UPPER AIR SOUNDING. MULTISPECTRAL GOES 8 IMAGERY
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ERUPTION DETAILS: SEISMIC EXPLOSIVE EVENT AROUND 25/0505 UTC.
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DETAILS OF ASH CLOUD: ASH COULD NOT BE DISCERNED IN VISIBLE
SATELLITE IMAGERY THROUGH 1132 UTC.  SIGNIFICANT HIGH CLOUDS
DOMINATE THE EASTERN CARIBBEAN MAKING DETECTION OF ASH DIFFICULT.
CAUTION SHOULD BE EXERCISED.  THE MONTSERRAT VOLCANO OBSERVATORY HAD
INDICATED THAT THE HEIGHT OF THE PLUME WAS LIKELY TO FL100 BASED ON
SEISMICITY.
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TRAJECTORY: UP TO FL050 ASH WOULD MOVE NORTHWEST AT ABOUT 5 KTS.
BETWEEN FL050 AND FL1OO ASH WOULD MOVE MORE TO THE NORTH AT ABOUT 7
TO 10 KTS.                                    
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THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY
A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS
www.ssd.noaa.gov/VAAC/messages.html
(all lower case except /VAAC/)
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED AROUND 25/1800 UTC UNLESS ADDITIONAL
INFORMATION BECOMES AVAILABLE.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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