FVXX21 KWBC 291230
VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1230 UTC 29 APR 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-502         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. SIX HOUR
FORECAST FROM THE 29/0600 UTC AVIATION MODEL.
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ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS.   
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 29/1145 UTC SHOWS
LOW TO MID LEVEL CLOUDS OVER THE AREA MAKING DETECTION OF ASH
DIFFICULT.  THE GEOPHYSICAL INSTITUTE HOWEVER DID REPORT
PROBABLE ASH OVER THE SUMMIT AT 29/0642 UTC.  NO HEIGHT
ASSIGNMENT WAS GIVEN.
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TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL250 WOULD MOVE
TOWARDS THE WEST AT ABOUT 20 KNOTS.
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 29/1830 UTC.
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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
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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