FVXX21 KWBC 040915
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0915 UTC 04 APR 1999 BY THE WASHINGTON VAAC
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POPOCATEPETL 99-058    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 AND SHORTWAVE INFRARED
IMAGERY.
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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 SHOWS AN ERUPTION
OF POPOCATEPETL. PRELIMINARY SATELLITE ANALYSIS SHOWS THE ASH CLOUD
AS OF 04/0845 UTC ALONG A LINE 33 KM LONG (18 NMI) AND 10 KM WIDE (5
NMI) FROM 19.16N 98.47W TO 18.93N 98.27W. AN ESTIMATE OF HEIGHT IS
NOT AVAILABLE AT THIS TIME. A HEIGHT AND TRAJECTORY ASSESSMENT WILL
FOLLOW IN THE NEXT MESSAGE TO BE ISSUED SHORTLY.
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TRAJECTORY: SATELLITE EXTRAPOLATION SHOWS ASH MOVING NORTHEAST AT 10
TO 20 KNOTS AT THIS TIME.
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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 04/0945 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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"Attached Graphic Map Depicting Ash" 

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