FVXX20 KWBC 111330
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1330 UTC 11 APR 1999 BY THE WASHINGTON VAAC
CORRECTED FOR TRAJECTORY
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SOUFRIERE HILLS 99-103    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 INFRARED AND MULTISPECTRAL
SATELLITE IMAGERY. 1200 UTC GUADELOUPE UPPER AIR SOUNDING.
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ERUPTION DETAILS: INITIAL ERUPTION AT 11/0640 UTC.
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DETAILS OF ASH CLOUD:1245 UTC IMAGERY INDICATES A BAND OF DIFFUSE
ASH 70 NMI LONG AND 10 NMI WIDE EXTENDING FROM ABOUT 16.3N 61.5W TO
17.2N 61.0W.  MOVEMENT IS TO THE EAST AND EAST-SOUTHEAST AT 10KT.
THE 1200 UTC GUADELOUPE SOUNDING WOULD PUT THE HEIGHT AT ABOUT
FL100. 
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TRAJECTORY:EAST TO EAST-SOUTHEAST  AT 10 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 MESSAGE WILL BE AT 11/1930 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN

"Attached Graphic Map Depicting Ash" 

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