FVXX20 KWBC 281515     
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1515 UTC 28 MAY 1999 BY THE WASHINGTON VAAC 
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POPOCATEPETL   99-073     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 SATELLITE IMAGERY.
CENAPRED ONLINE POPO-CAM.  1200 UTC MEXICO CITY SOUNDING ...
CENAPRED VOLCANO OBSERVATORY   
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ERUPTION DETAILS: ERUPTION AT APPROX 28/1230 UTC.
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DETAILS OF ASH CLOUD: EXTREMELY FAINT ASH CLOUD FROM A SMALL
ERUPTION IS APPARENT ON MULTI-SPECTRAL IMAGERY AND POPO-CAM.  DUE TO
UNSTABLE ATMOSPHERE... ASH HAS RISEN TO APPROXIMATELY FL300.  THE
EXTENT OF THE PLUME IS UNCERTAIN DUE TO RAPID DISPERSION... BUT
APPEARS TO EXTEND 70 KM (38 NMI) NORTH FROM THE SUMMIT AND IS
APPROXIMATELY 21 KM (11 NMI) WIDE.         
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TRAJECTORY: MOVING TOWARDS THE NORTH AND NORTH-NORTHEAST AT 30 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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NEXT STATEMENT WILL BE ISSUED BY 28/2115
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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"Attached Graphic Map Depicting Ash" 

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