FVXX21 KWBC 202300
VOLCANIC ASH ADVISORY
ISSUED 2300 UTC 20 JUL 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-848         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 DETECTED IN THE SATELLITE IMAGERY
THROUGH 20/2215 UTC ALTHOUGH THERE ARE EXTENSIVE CLOUDS IN THE
AREA. THE GEOPHYSICAL INSTITUTE REPORTED AN EXPLOSION AT
20/1941 UTC THAT PRODUCED A LARGE AMOUNT OF ASH OVER THE
SUMMIT TO FL260. AS OF 20/2200 UTC THE GEOPHYSICAL INSTITUTE
HAD RECEIVED NO REPORTS OF ASH FALL NEAR THE CITY OF AMBATO OR
OTHER AREAS SOUTH AND WEST OF THE VOLCANO.

TRAJECTORY: ASH FROM THE SUMMIT TO FL260 WOULD MOVE TOWARDS
THE SOUTHWEST AT 5-15 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 21/0500 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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CLARK
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