FVXX20 KWBC 210130
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0130 UTC 21 May 1999 BY THE WASHINGTON VAAC 
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SOUFRIERE HILLS 99-132    WEST INDIES 16.7N 62.2W  
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BACKGROUND:    SOUFRIERE HILLS MONTSERRAT (1600-05)
               SUMMIT HEIGHT 3000FT (915M)
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SOURCES OF INFORMATION: GOES 8 MULTISPECTRAL SATELLITE
IMAGERY...0000 UTC GUADELOUPE SOUNDING DATA
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ERUPTION DETAILS: ERUPTION AT 20/2140 UTC
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DETAILS OF ASH CLOUD:  WHILE CONVENTIONAL ENHANCED INFRARED GOES 8
SATELLITE IMAGERY FAILED TO RESOLVE AN ASH CLOUD FROM THE 20/2140
UTC ERUPTION...MULTISPECTRAL SATELLITE IMAGERY CLEARLY INDICATED ONE
WITHIN 10 KM (5 NMI) EITHER SIDE OF A LINE FROM 16.8N/62.9W AND
16.7N/62.5W AT 0045 UTC.  THE HEIGHT OF THE ASH CLOUD TOPS WAS
ESTIMATED TO BE BELOW FL100 BASED ON THE 0000 UTC SOUNDING FROM
GUADELOUPE.
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TRAJECTORY: SATELLITE DATA INDICATES THAT THE ASH CLOUD IS MOVING
SIGNIFICANTLY SLOWER THAN PREVIOUSLY ANALYSED. MOVEMENT IS TOWARD
THE WEST 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 ISSUED AROUND 21/0730.
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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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