FVXX20 KWBC 271930
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1930 UTC 27 JAN 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-001   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
INFRAFRED AND MULTISPECTRAL IMAGERY....1200 UTC SOUNDING FROM MEXICO
CITY...1800 UTC HIGH DENSITY SATELLITE WINDS
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ERUPTION DETAILS: THE MEXICO CITY METEOROLOGICAL WATCH OFFICE REPORTS
AN EXHALATION TO FL220 AT 27/1840 UTC.  THE STEAM AND ASH IS MOVING
NORTHWARD AT 10 TO 15 KTS. 
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DETAILS OF ASH CLOUD: SATELLITE IMAGERY DOES NOT INDICATE THE
ERUPTION. THE SHORTWAVE IMAGERY SHOWS A HOTSPOT OVER THE VOLCANO. 
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TRAJECTORY: ASH BETWEEN FL180 AND FL220 WILL MOVE NORTH TO NORTHEAST
AT 10 TO 15 KTS..
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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.
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THE NEXT MESSAGE WILL BE SENT AROUND 28/0130 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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