FVXX20 KWBC 210125
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0125 UTC 21 JULY 1999 BY THE WASHINGTON VAAC 
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SOUFRIERE HILLS 99-182    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 21/0045 UTC.  MONTSERRAT VOLCANO OBSERVATORY. 21/0000 UTC
GUADELOUPE RADIOSONDE.

ERUPTION DETAILS:  ERUPTION OCCURRED AT ABOUT 20/0910 UTC.
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DETAILS OF ASH CLOUD: THE 21/0045 UTC SATELLITE IMAGE SHOWS ASH
APPROXIMATELY BOUNDED BY 17.5N 64.5W 17.0N 64.5W 17.3N 65.8W 16.8N
65.8W 16.5N 64.2W 17.5N 63.0W.  THIS AREA IS APPROXIMATELY 170 NMI
LONG AND 35 NMI WIDE.  THE 21/0000 UTC SOUNDING FROM GUADELOUPE WOULD 
PLACE THE LEVEL AT ABOUT FL100.  THE HIGH LEVEL ASH TO THE NORTH AND
NORTHEAST OF MONTSERRAT HAS BECOME TOO DISPERSED TO BE OBSERVED ON
SATELLITE BUT PROBABLY STILL REMAINS IN THE AREA.
TRAJECTORY: THE ASH AROUND FL100 WAS MOVING TOWARD THE WEST AT 15KT.
EARLIER THE ASH FROM FL230 TO FL400 WAS MOVING TO THE NORTHEAST AT 20-25KT.
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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
www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE LATEST SIGMETS AND VAFTAD.
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THE NEXT MESSAGE WILL BE ISSUED BY 21/0730 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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"Attached Graphic Map Depicting Ash" 

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