FVXX20 KWBC 200945
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0945 UTC 20 JULY 1999 BY THE WASHINGTON VAAC 
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SOUFRIERE HILLS 99-178    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: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY
THROUGH 20/0915 UTC.  MONTSERRAT VOLCANO OBSERVATORY.  00 UTC
GUADELOUPE RADIOSONDE.

ERUPTION DETAILS:  ERUPTION OCCURRED AT ABOUT 20/0910 UTC.
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DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTS AN
ASH PRODUCING ERUPTION AT ABOUT 0910 UTC.  SATELLITE IMAGERY AT 0915
UTC SHOWS AN ASH PLUME EXTENDING FROM THE VOLCANO ABOUT 15 KM (8 NMI)
TOWARD THE EAST NORTHEAST.  ASH HEIGHT ASSIGNMENT IS DIFFICULT BASED
ON THE SINGLE AVAILABLE SATELLITE IMAGE BUT THE DIRECTION OF ASH
MOVEMENT SUGGESTS THE PRESENCE OF ASH TO ABOUT FL300 OR EVEN FL350. 
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TRAJECTORY: ASH IS MOVING TO THE EAST NORTHEAST AT LESS THAN 20 KNOTS. 
LOWER ASH MIGHT BE MOVING TO THE SOUTHEAST AT LESS THAN 15 KNOTS.

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
www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE LATEST SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 20/1545 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"