FVXX20 KWBC 180730
VOLCANIC ASH ADVISORY
ISSUED 0730 UTC 18 SEP 2000 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 00-246          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: INFRARED AND MULTISPECTRAL SATELLITE
IMAGERY. THE MONTSERRAT VOLCANO OBSERVATORY. 18/0000 UTC
GUADELOUPE UPPER AIR SOUNDING.
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ERUPTION DETAILS: PERIODIC EXPLOSIONS AND EMISSIONS
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DETAILS OF ASH CLOUD: NO ASH IS VISIBLE IN SATELLITE IMAGERY
THROUGH 18/0715 UTC ALTHOUGH SCATTERED CLOUDS PERSIST IN THE
AREA AROUND THE VOLCANO. THE MVO REPORTS THAT THERE HAS BEEN
AT LEAST ONE EXPLOSION PER DAY AND THESE TYPICALLY OCCUR AT
NIGHT. THEREFORE THIS ADVISORY WILL CONTINUE AS LONG AS THERE
IS A CREDIBLE THREAT TO AVIATION IN THE AREA.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH FROM SUMMIT
LEVEL TO FL100 WOULD MOVE WEST AT 15 TO 30 KNOTS. 
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OUTLOOK: SEE SIGMETS.
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THE NEXT ADVISORY WILL BE ISSUED BY 18/1330 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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CLARK
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