FVXX20 KWBC 131200
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1200 UTC 13 JAN 1999 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 99-008    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
IMAGERY. MONTSERRAT VOLCANO OBSERVATORY. 0000 UTC GUADELOUPE SOUNDING.
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ERUPTION DETAILS: 2 ERUPTIONS OCCURRING AROUND 13/1035 UTC.
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DETAILS OF ASH CLOUD: GOES-8 VISIBLE IMAGERY THROUGH 1132 UTC SHOWS
TWO DISTINCT ASH CLOUDS...ONE MOVING WEST OFF THE ISLAND...AND THE
OTHER OVER MONTSERRAT EXTENDING NORTHEAST OFF OF THE ISLAND. THE FIRST
ASH CLOUD IS LOCATED WITHIN 20 KM (11 NMI) EITHER SIDE OF A LINE 24 KM
(13 NMI) LONG DUE WEST FROM THE VOLCANO. THIS ASH IS ESTIMATED TO BE
BELOW FL100. THE SECOND ASH CLOUD IS LOCATED WITHIN 3.5 KM (1.9 NMI)
EITHER SIDE OF A LINE 50 KM (27 NMI) LONG FROM 16.59N 62.28W TO 16.91N
61.96W. THIS ASH IS ESTIMATED TO BE AT A HEIGHT OF FL250.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH UP TO FL100 WOULD
MOVE WEST AT 15 TO 20 KNOTS. ASH TO FL250 WOULD MOVE NORTHEAST AT 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 LATEST SIGMETS AND VAFTAD.
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THE NEXT MESSAGE FOR THIS EVENT WILL BE ISSUED BY 13/1800.
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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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