FVXX22 KWBC 030120
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0120 UTC 03 NOVEMBER 1999 BY THE WASHINGTON VAAC 
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SOUFRIERE HILLS 99-250    WEST INDIES 16.7N 62.2W  
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BACKGROUND:    SOUFRIERE HILLS MONTSERRAT (1600-05)
               SUMMIT HEIGHT 3000 FT (915M)
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SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY...GOES-8
VISIBLE INFRARED AND MULTISPECTRAL IMAGERY...1200 UTC U.S. NATIONAL
WEATHER SERVICE AVIATION WEATHER MODEL WIND DATA.
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ERUPTION DETAILS: NEW ERUPTION BEGAN AT ABOUT 02/2155 UTC.
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DETAILS OF ASH CLOUD: THERE IS CURRENT EVIDENCE IN SATELLITE IMAGERY
TO INDICATE THAT THE LATEST EXPLOSION AT SOUFRIERE HILLS HAS SENT
ASH TO AN EVEN HIGHER LEVEL IN THE ATMOSPHERE. MULTISPECTRAL IMAGERY
AT 03/0045 UTC INDICATES THAT A SMALL ASH CLOUD HAS RESULTED FROM
THE EXPLOSION BUT THERE ARE TWO DISTINCT DIRECTIONS OF MOVEMENT. IT
IS BELIEVED THAT ASH OVER THE LAST TWO HOURS HAS NOW REACHED FL200. 
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ONE AREA OF ASH IS 11 KM (6 NMI) WIDE AND EXTENDS 45 KM (24 NMI)
FROM THE SUMMIT TO A POINT AT 16.89N 62.56W WITH A HEIGHT ESTIMATED
TO FL150. THIS MOVEMENT IS TO THE WEST AND NORTHWEST.
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THE SECOND AREA OF ASH ESTIMATED BETWEEN FL150 AND FL200 IS LOCATED
IN A LAYER WHERE THE WINDS CHANGE DIRECTION SHARPLY WITH HEIGHT.
THIS AREA OF ASH IS 25 KM (13 NMI) WIDE AND EXTENDS 24 KM (13 NMI)
FROM THE SUMMIT TO A POINT AT 16.65N 61.89W. MOVEMENT HERE IS SLOW
TO THE SOUTHEAST.
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TRAJECTORY: ASH TO FL150 IS MOVING WEST TO NORTHWEST AT 10 TO 15
KNOTS. HOWEVER ASH BETWEEN FL150 AND FL200 IS MOVING SOUTHEAST AT 5
TO 10 KNOTS.
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH
ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH
LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS  
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 03/0730 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON
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NNNN"Attached Graphic Map Depicting Ash" 

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