FVXX21 KWBC 1845
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1845 UTC 24 May 1999 BY THE WASHINGTON VAAC 
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POPOCATEPETL 99-070   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: CENEPRED..PILOT REPORT...1200 UTC UPPER AIR
DATA FROM MEXICO CITY...GOES 8 VISIBLE AND MULTISPECTRAL IMAGERY
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ERUPTION DETAILS: ERUPTION AROUND 24/1750 UTC.
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DETAILS OF ASH CLOUD: VISIBLE AND MULTISPECTRAL SATELLITE IMAGERY
THROUGH 1815 UTC DID NOT INDICATE ANY ASH CLOUD UNDER CLEAR SKIES.
THE MEXICAN VOLCANO OBSERVATORY (CENEPRED) AND A PILOT REPORT
INDICATED ASH TOPS BETWEEN FL210 AND FL250. 
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TRAJECTORY: ANY ASH BETWEEN FL180 AND FL240 WOULD MOVE TOWARDS THE
SOUTHWEST AT 20 KNOTS WHILE ASH BETWEEN FL240 AND FL250 WOULD MOVE
SOUTH SOUTHWEST AT 5 KNOTS.
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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 ISSUED AROUND 25/0100 UTC
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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