FVXX22 KWBC 130500
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0500 UTC 13 JAN 2000 BY THE WASHINGTON VAAC 
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POPOCATEPETL 00-002         MEXICO 1901N 9837W 
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BACKGROUND:    POPOCATEPETL MEXICO (1401-04)
               SUMMIT HEIGHT 17930 FT (5465 M)
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SOURCES OF INFORMATION: GOES 8 INFRARED AND MULTISPECTRAL
IMAGERY...MEXICO CITY MWO...1800 UTC AVIATION MODEL SOUNDING
DATA...0000 UTC MEXICO CITY UPPER-AIR SOUNDING...
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ERUPTION DETAILS: ERUPTION BEGAN AT 13/0303 UTC...
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DETAILS OF ASH CLOUD: GOES-8 INFRARED AND MULTISPECTRAL SATELLITE
IMAGERY THROUGH 13/0440 UTC INDICATES THAT A SIGNIFICANT EXPLOSION
OCCURRED AT POPOCATEPETL. ALL CURRENT AVAILABLE CHANNELS OF
SATELLITE IMAGERY INDICATE ASH AND STEAM MOVING AWAY FROM THE
SUMMIT. THE APPEARANCE SEEN IN INFRARED IMAGERY STRONGLY SUGGESTS
THAT THE ASH AND STEAM HAS REACHED A RATHER SIGNIFICANT HEIGHT. THE
ASH AND STEAM IS ESTIMATED TO HAVE REACHED FL300. GIVING SUPPORT TO
THIS HEIGHT IS THE 0000 UTC UPPER-AIR SOUNDING DATA FROM MEXICO
CITY. NOW AS OF 13/0440 UTC THE ASH CAN BE SEEN SPLITTING APART AND
MOVING IN MULTIPLE DIRECTIONS. THE ASH REACHING FL300 HAS MOVED
NORTHEAST TO THE POINT 1918N9827W WHICH IS A DISTANCE OF 36 KM (19
NMI) FROM THE SUMMIT. THE OVERALL ASH CLOUD IS AN IMPRESSIVE 51 KM
(28 NMI) WIDE. ASH BETWEEN THE SUMMIT AND FL230 IS MOVING NORTHWEST
WHILE ASH BETWEEN FL230 AND FL300 IS MOVING NORTH.
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TRAJECTORY: ASH BETWEEN THE SUMMIT AND FL230 IS MOVING NORTHWEST AT
ONLY 5 KNOTS. ASH BETWEEN FL230 AND FL300 IS MOVING NORTH AT 5 TO 10
KNOTS. ASH AT FL300 IS MOVING NORTHEAST AT 10 TO 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  
www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE LATEST SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 13/1100 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON
NNNN"Attached Graphic Map Depicting Ash" 

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