FVXX21 KWBC 311320
VOLCANIC ASH ADVISORY
ISSUED 1320 UTC 31 JUL 2000 BY THE WASHINGTON VAAC
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TUNGURAHUA 00-894         ECUADOR 0128S 7826W 
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BACKGROUND:    TUNGURAHUA ECUADOR (1502-08)
               SUMMIT HEIGHT 16480 FT (5023 M)
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SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND
MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE...WIND FORECAST
FROM THE AVIATION MODEL. 
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ERUPTION DETAILS: EMISSIONS OF ASH AND STEAM.
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1245 UTC SHOWS A
FAINT NARROW PLUME EXTENDING FROM THE SUMMIT TO APPROXIMATELY
THE POINT 0129S 7854W.  THE PLUME IS ABOUT 47KM (25 NMI LONG)
AND 05KM (3NMI) WIDE. THE PLUME IS ESTIMATED AT OR SLIGHTLY
ABOVE SUMMIT HEIGHT OR APPROXIMATELY FL180.

TRAJECTORY: ASH NEAR THE SUMMIT LEVEL WOULD MOVE TOWARD THE
WEST AT 15 TO 20 KNOTS. 
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OUTLOOK: SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 31/1930 UTC.
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC
ASH ADVISORIES 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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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN"Attached Graphic Map Depicting Ash" 

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