FVXX21 KWBC 291230
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1230 UTC 29 FEB 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-254         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. THE GEOPHYSICAL INSTITUTE IN QUITO.
29/1200 UTC AVN MODEL WINDS.
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ERUPTION DETAILS: MODERATE EXPLOSION AT 12:44 LOCAL TIME.
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DETAILS OF ASH: SATELLITE IMAGERY THRU 29/1145 SHOWS THICK
CIRRUS OVER THE VOLCANO DUE TO CONVECTION LOCATED TO THE EAST
OF TUNGURAHUA MAKING ASH DETECTION IMPOSSIBLE. THE GEOPHYSICAL
INSTITUTE IN QUITO REPORTS THAT THERE WAS A MODERATE EXPLOSION
AT 12:44 LOCAL TIME. HOWEVER NO HEIGHT COULD BE ASSESSED DUE
TO THE ADVERSE WEATHER CONDITIONS SURROUNDING TUNGURAHUA. 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL200 TO
MOVE WEST-SOUTHWEST AT 10 TO 15 KNOTS. ASH BETWEEN FL200 TO
FL300 WOULD MOVE WEST-SOUTHWEST AT 20 KNOTS. ASH ABOVE FL300
WOULD MOVE WEST AT 10 TO 15 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 29/1830 UTC.

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
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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HUGHES-NOAA/NESDIS/SAB
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