FVXX23 KWBC 082230
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2230 UTC 08 NOV 1999 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS   99-254   WEST INDIES  16.7N 62.2W 
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BACKGROUND:      SOUFRIERE HILLS   MONTSERRAT  (1600-05)
                 SUMMIT HEIGHT  3000 FT  (915 M)
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SOURCES OF INFORMATION: MONTSERRAT VOLCNO OBSERVATORY...GOES-8
VISIBLE AND MULTISPECTRAL SATELLITE IMAGERY...12 UTC AVN MODEL
UPPER-AIR SOUNDING.
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ERUPTION DETAILS: ERUPTION OCCURRED AT 08/2030 UTC.
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DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY HAS
REPORTED AND SATELLITE IMAGERY CONFIRMS THAT AN ERUPTION OCCURRED AT
THE SOUFRIERE HILLS VOLCANO. IN FACT THE MULTISPECTRAL AND INFRARED
SATELLITE IMAGERY THROUGH 2145 UTC SHOWS AN ASH CLOUD NOW OVER AND
TO THE EAST OF THE VOLCANO SITE. IT APPEARS BASED ON SATELLITE
IMAGERY AND A CHECK OF UPPER-AIR WIND DATA THAT THE ASH PLUME
CONTINUED ITS ASCENT FROM FL100. THE ASH IS ESTIMATED TO HAVE
REACHED A FINAL ALTITUDE OF ABOUT FL250.
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THE ASH CLOUD EXTENDS 20 KM (11 NMI) TO THE EAST OF THE SUMMIT AND
IS 18 KM (10 NMI) WIDE AT 08/2145 UTC. ASH IS ALSO HOVERING OVER THE
SUMMIT AND TO A SHORT DISTANCE OF ABOUT 5 KM (3 NMI) TO THE WEST.
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TRAJECTORY: ASH FROM THE SUMMIT TO FL100 IS EXPECTED TO MOVE TO THE
WEST-NORTHWEST AT ONLY 5 KNOTS. FROM FL100 TO FL250 THE MOVEMENT
SHOULD BE TO THE EAST 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 AND VAFTAD.
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THE NEXT MESSAGE WILL BE ISSUED BY 09/0430 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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