FVXX20 KWBC 161220   
VOLCANIC ASH ADVISORY
ISSUED 1220 UTC 16 SEP 2000 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 00-238          WEST INDIES 1643N 6211W  
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BACKGROUND:    SOUFRIERE HILLS  MONTSERRAT (1600-05)
               SUMMIT HEIGHT  3000 FT (915M)
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SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED..AND
MULTISPECTRAL IMAGERY. 16/1200 UTC FORECAST UPPER WINDS FROM
THE 16/0600 UTC AVIATION MODEL.  
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ERUPTION DETAILS: CONTINUED ROCKFALLS AND SMALL PYROCLASTIC
FLOWS. 
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DETAILS OF ASH CLOUD: GOES-8 IMAGERY THROUGH 1145 UTC DOES NOT
INDICATE THE PRESENCE OF ASH DUE TO BROKEN MID AND HIGH LEVEL
CLOUDS PARTIALLY OBSCURING THE VIEW NEAR AND AROUND THE
VOLCANO. LOW LEVEL ASH BELOW FL100 WOULD BE DIFFICULT TO
DETECT AT THIS TIME. WE WILL KEEP THE ADVISORY ALIVE UNTIL
THERE IS DEFINITIVE EVIDENCE TO WARRANT AND END ADVISORY. 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR BELOW
FL100 TO MOVE SOUTHWEST AT 5 TO 10 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT ADVISORY WILL BE ISSUED BY 16/1830 UTC.
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REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES 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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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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HUGHES
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