FVXX22 KWBC 111800
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1800 UTC 11 NOV 1999 BY THE WASHINGTON VAAC 
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POPOCATEPETL 99-104 MEXICO 19.02N 98.62W 
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BACKGROUND:    POPOCATEPETL MEXICO (1401-09)
               SUMMIT HEIGHT 17930 FT (5465 M)
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SOURCES OF INFORMATION:  GOES-8 VISIBLE INFRARED AND MULTISPECTRAL
IMAGERY.  1200 UTC MEXICO CITY SOUNDING.  MEXICO CITY MWO AND
CENAPRED VOLCANO CAM.
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ERUPTION DETAILS:   THE MEXICO CITY MWO REPORTS A SMALL ERUPTION OF
STEAM AND ASH AT 1725 UTC TO FL180.
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DETAILS OF ASH CLOUD:  SATELLITE IMAGERY THROUGH 11/1732 UTC SHOWS 
CONSIDERABLE CLOUDINESS OVER THE AREA MAKING DETECTION OF ASH
IMPOSSIBLE.  HOWEVER..EARLIER IMAGERY DID SHOW A WELL DEFINED
HOTSPOT ASSOCIATED WITH THE VOLCANO.
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TRAJECTORY: UPPER AIR DATA FROM MEXICO CITY SUGGEST ASH AT FL180
WOULD MOVE TOWARD THE WEST-NORTHWEST AT 10KTS.
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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.
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NEXT ADVISORY WILL BE ISSUED AROUND 12/0000 UTC.      
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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WALTER/SAB/NOAA/NESDIS
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