FVXX21 KWBC 181700
VOLCANIC ASH ADVISORY  
ISSUED 1700 UTC 18 JUN 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-713         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. WIND FORECAST FROM AVIATION MODEL.
SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE.
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ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS.  
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DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY
THROUGH 18/1615 UTC BECAUSE OF THE DENSE WEATHER CLOUDS
COVERING THE AREA.  THE GEOPHYSICAL INSTITUTE OBSERVED ASH TO
FL250 OVER THE VOLCANO AT 18/0602 UTC.  
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH FROM THE
SUMMIT TO FL250 WOULD MOVE TOWARD THE WEST OR WEST SOUTHWEST
AT 12 TO 20 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 18/2300 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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