FVXX21 KWBC 210700  
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0700 UTC 21 APR 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-468         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 INFRARED AND MULTISPECTRAL
IMAGERY.  6 HOUR WIND FORECAST FROM THE 21/0000 UTC AVIATION
MODEL.  THE GEOPHYSICAL INSTITUTE IN QUITO.
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ERUPTION DETAILS: OCCASIONAL ASH EMISSIONS.
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DETAILS OF ASH: GOES-8 IMAGERY THROUGH 21/0615 UTC CONTINUES
TO SHOW EXTENSIVE CLOUDINESS OVER THE AREA MAKING ASH
DETECTION DIFFICULT.  AT 21/0303 UTC THE GEOPHYSICAL INSTITUTE
REPORTED ASH OVER THE VOLCANO HOWEVER NO HEIGHT WAS GIVEN.
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TRAJECTORY: ANY ASH UP TO FL300 WOULD MOVE WEST-SOUTHWEST AT
20 KNOTS.
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THE NEXT STATEMENT WILL BE ISSUED BY 21/1300 UTC.
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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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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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WALTER
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