FVXX21 KWBC 201700
VOLCANIC ASH ADVISORY
ISSUED 1700 UTC 20 JUL 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-847         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. WINDS FORECAST FROM THE AVIATION MODEL.
GEOPHYSICAL INSTITUTE REPORT.
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ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS.  
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DETAILS OF ASH: ASH WAS NOT SEEN IN THE SATELLITE IMAGERY
THROUGH 20/1615 UTC ALTHOUGH THERE ARE EXTENSIVE CLOUDS IN THE
AREA. THE GEOPHYSICAL INSTITUTE REPORTED ASH OVER THE SUMMIT
AT 20/1440 UTC TO FL250 MOVING WEST.

TRAJECTORY: ASH FROM THE SUMMIT TO FL250 WOULD MOVE TOWARDS
THE WEST AT 10-20 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 20/2300 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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WALTER
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