FVXX21 KWBC 271330
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1330 UTC 27 NOV 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-174        ECUADOR 1.47S 78.44W 
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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 AND MULTISPECTRAL AND
INFRARED IMAGERY...SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH
OFFICE...  REPORT FROM THE GEOFISICO INSTITUTO.
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ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS
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DETAILS OF ASH: NO ASH IS SEEN IN SATELLITE IMAGERY THROUGH 27/1245
UTC. HOWEVER  CLOUDS OVER THE VOLCANO AND STRONG THUNDERSTORMS TO
THE EAST MIGHT BE OBSCURING ASH IN THE IMAGERY. THE GEOFISICO
INSTITUTO REPORTS THAT THE VOLCANO HAS AN ALMOST PERMANENT PLUME OF
GASES AND A LITTLE ASH THAT REACHES AROUND 1KM (3,300FT) ABOVE THE
SUMMIT TO AROUND FL200. 
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TRAJECTORY: UPPER AIR PATTERNS OVER THE VOLCANO ARE QUITE VARIABLE
AND ASH COULD EASILY MOVE IN A VARIETY OF DIRECTIONS.  HOWEVER AT
ABOUT FL200 SOME OF THE ASH WILL PROBABLY MOVE TO THE SOUTHWEST AT
LESS THAN 15 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  
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 27/1930 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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