FVXX23 KWBC 041815
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1815 UTC 04 NOV 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-102 MEXICO 19.0N 98.6W
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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 AND MULTISPECTRAL SATELLITE
IMAGERY. MEXICO CITY METEOROLOGICAL WATCH OFFICE ...POPO CAMERA.
12Z UPPER LEVEL WIND SOUNDING.
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ERUPTION DETAILS: ERUPTION OCCURRED AT 04/1711 UTC.
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DETAILS OF ASH CLOUD: THE ERUPTION IS VERY EVIDENT IN SATELLITE
IMAGERY THROUGH 1745 UTC. THE PLUME IS MOVING IN 2 DIRECTIONS FROM
THE SUMMIT WITH ONE AREA ESTIMATED BETWEEN FL19O AND FL240 EXTENDING
TO THE WEST AROUND 9 NMI AND WAS AROUND 5 NMI WIDE AND THE OTHER
HIGHER LEVEL AREA BETWEEN FL280 AND FL300 EXTENDING TO THE NORTHEAST
AROUND 12 NMI AND ALSO AROUND 5 NMI WIDE.
TRAJECTORY: ANY ASH BETWEEN FL190 AND FL240 WILL MOVE WESTERLY
AROUND 10 KNOTS AND SWING AROUND TO THE NORTHEAST BETWEEN FL280 TO
FL300 AROUND 20 KNOTS.
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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
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED AROUND 05/0015 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN"Attached Graphic Map Depicting Ash"
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