FVXX20 KWBC 292107    
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2107 UTC 29 JAN 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-003   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: SIGMET FROM MEXICO CITY MWO...GOES 8 VISIBLE
INFRARED AND MULTISPECTRAL IMAGERY....1200 UTC SOUNDING FROM MEXICO
CITY.
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ERUPTION DETAILS: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTS
AN EXHALATION OF STEAM AND ASH UP TO FL290 AT 29/2015 UTC.  THE STEAM
AND ASH WAS REPORTED MOVING NORTHEAST. 
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DETAILS OF ASH CLOUD: NO OBVIOUS ASH SIGNATURES WERE OBSERVED
ALTHOUGH THERE WAS EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA.
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TRAJECTORY: THE 1200 UTC FROM MEXICO CITY INDICATES THAT ASH BETWEEN
FL180 AND FL290 WOULD MOVE TOWARD THE EAST-NORTHEAST AT UP TO 20KT.
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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/messages.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE SIGMETS AND VAFTAD.
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THIS NEXT MESSAGE WILL BE ISSUED BY 30/0300 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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