FVXX21 KWBC 041015
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1015 UTC 04 APR 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-060    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: GOES-8 MULTISPECTRAL IMAGERY. 00 UTC MEXICO
CITY SOUNDING. 
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ERUPTION DETAILS: ERUPTION BETWEEN 04/0815 AND 04/0845 UTC.
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DETAILS OF ASH CLOUD: GOES-8 MULTISPECTRAL IMAGERY THROUGH 0945 UTC
SHOWS AN ELONGATED ASH CLOUD MOVING BOTH NORTHEAST AND SOUTHEAST FROM
POPOCATEPETL. THE ASH IS LOCATED IN A LINE 125 KM (67 NMI) LONG AND
13 KM (7 NMI) WIDE FROM 19.48N 98.22W TO 18.57N 97.53W. THE NORTHERN
HALF OF THIS CLOUD IS ESTIMATED TO BE AT OR BELOW FL300 WHILE THE
SOUTHERN HALF IS ESTIMATED TO BE AT OR BELOW FL360.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL180 AND
FL300 TO MOVE EAST NORTHEAST AT 15 TO 25 KNOTS. ANY ASH BETWEEN FL300
AND FL360 WOULD MOVE SOUTHEAST AT 15 TO 25 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 VAFTAD.
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THE NEXT MESSAGE FOR THIS EVENT WILL BE ISSUED BY 04/1600 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN
"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"