FVXX20 KWBC 212220
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2220 UTC 21 MAR 1999 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 99-053    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: GOES-8 VISIBLE IMAGERY. PILOT REPORT AND 
MONTSERRAT VOLCANO OBSERVATORY. 1200 UTC GUADELOUPE SOUNDING.
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ERUPTION DETAILS: ASH PRODUCING EVENT AROUND 21/2000 UTC.
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DETAILS OF ASH CLOUD: A PILOT REPORT WAS RECEIVED AT 2200 UTC
STATING AN ASH CLOUD WAS 30 MILES WEST OF MONTSERRAT. THE VOLCANO
OBSERVATORY HAS CONFIRMED A ROCKFALL THAT PRODUCED SOME ASH THAT HAS
BEEN PICKED UP BY THE WIND.  VISIBLE SATELLITE IMAGERY THROUGH 2130
UTC SHOWS THE FAINT ASH CLOUD MOVING WEST (270 DEGREES) FROM THE
ISLAND EXTENDING 40 KM (22 NMI) FROM THE VOLCANO. THE PILOT REPORTED
ESTIMATED THE HEIGHT OF THE ASH AS FL080.
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TRAJECTORY: ASH BELOW FL100 WILL MOVE WEST AROUND 10 TO 15 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.
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THE NEXT STATEMENT WILL BE ISSUED AROUND 22/0430 UTC.   
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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