FVXX21 KWBC 270730
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0720 UTC 27 NOV 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-173        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 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 27/0645
UTC. HOWEVER THE DENSE WEATHER CLOUDS IN THE AREA 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 OR 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 27/1330 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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