FVXX20 KWBC 031700
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1700 UTC 03 APR 1999 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 99-086    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. GOES-8
VISIBLE AND MULTISPECTRAL SATELLITE IMAGERY. 1200 UTC GUADELOUPE
SOUNDING. 
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ERUPTION DETAILS: ERUPTION AT 03/1549 UTC
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DETAILS OF ASH CLOUD: IN THE 1632 UTC IMAGERY BOTH AN ASH CLOUD AND
A THUNDERSTORM CAN BE SEEN ON THE SMALL ISLAND OF MONTSERRAT. THE
LEADING EDGE OF THE ASH CLOUD AT 1632 UTC WAS 31 KM (17 NMI) EAST OF
THE SUMMIT. THE DETECTABLE ASH CLOUD WAS STILL MOVING EAST TO EAST
NORTHEAST FROM THE ISLAND AND WAS ROUGHLY BOUNDED BY POINTS 16.82N
62.09 TO 16.84N 61.75W TO 16.71N 61.75W TO 16.68N 62.17W AND IS
ESTIMATED AROUND FL200 AND MOVING AROUND 35 KNOTS. ANY LOW LEVEL ASH
IS BEING MASKED BY THE THUNDERSTORM.  
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TRAJECTORY: ASH BELOW FL150 WILL MOVE NORTH TO NORTHEAST AROUND 15
KNOTS. ASH FL150 TO FL220 WILL MOVE EAST AROUND 35 TO 40 KNOTS. 
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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 AND VAFTAD.
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THE NEXT ADVISORY WILL BE ISSUED BEFORE 03/2300 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"