FVXX20 KWBC 041400
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1400 UTC 04 SEPTEMBER 1999 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 99-209 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: GOES 8 VISIBLE. 04/1200 UTC GUADELOUPE
SOUNDING.
ERUPTION DETAILS: INITIAL ERUPTION AT 04/0310 UTC.
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DETAILS OF ASH CLOUD: VISIBLE IMAGERY INDICATED THAT THE VOLCANO HAS
CONTINUED TO VENT ASH TO LOW LEVELS. AT 1315 UTC ASH WAS WITHIN 15
KM (8 NMI) EITHER SIDE OF A LINE FROM THE SUMMIT TO 17.2N/63.2W.
ANOTHER POSSIBLE AREA OF ASH WAS LOCATED WITHIN 30 KM (16 NMI) OF
POINT 17.4N/62.2W AT 1315 UTC. THIS SECOND AREA MAY BE WHAT REMAINS
OF THE ORIGINAL 04/0310 UTC ERUPTION. BOTH AREAS WERE ESTIMATED TO
BE BELOW FL050.
TRAJECTORY: WEST NORTHWEST AT 7 KT.
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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 SIGMETS AND VAFTAD
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THE NEXT MESSAGE WILL BE ISSUED BY 04/2000 UTC.
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PLEASE REFER TO VAFTAD AND SIGMETS FOR CURRENT WARNINGS.
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NNNN"Attached Graphic Map Depicting Ash"
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