FVXX21 KWBC 200730
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0730 UTC 20 MAR 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-038    MEXICO  19.02N 98.62W 
MESSAGE NUMBER HAS BEEN CHANGED DUE TO A PREVIOUS ERROR IN NUMBERING
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BACKGROUND:    POPOCATEPETL   MEXICO (1401-09)
               SUMMIT HEIGHT 17930 FT (5465 M)
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SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY
THROUGH 20/0715 UTC. 20/0000 UTC MEXICO CITY UPPER AIR SOUNDING.
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ERUPTION DETAILS: CENAPRED REPORTS AN EXHALATION AT 20/0041 UTC TO
FL400.
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DETAILS OF ASH CLOUD: SKIES ARE CLEAR OVER THE VOLCANO HOWEVER NO
ASH CLOUD IS VISIBLE IN THE SATELLITE IMAGERY AT THE MOMENT.
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TRAJECTORY: UPPER AIR WIND DATA SUGGEST THAT ASH AT FL400 WOULD MOVE
TOWARDS THE EAST AT OVER 50 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 AT 20/1330 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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