FVXX21 KWBC 071930
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1930 UTC 07 APR 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-412         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. 6 HOUR WIND FORECAST FROM THE 07/1200
UTC AVIATION MODEL.
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ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS.
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DETAILS OF ASH: VISIBLE IMAGERY THROUGH 07/1745 UTC INDICATES
CLOUD COVER OVER THE AREA SURROUNDING THE SUMMIT.  THE CLOUDS
ARE IMPEDING ASH DETECTION IN THE VISIBLE CHANNEL.  HOWEVER A
POSSIBLE ASH PLUME APPEARED IN 07/1715 UTC MULTISPECTRAL
IMAGERY TO THE SOUTHWEST OF THE SUMMIT. 
   THE POSSIBLE AREA OF ASH EXTENDS 37 KM (20 NMI) TO A POINT
0137S7845W AND IS APPROXIMATELY 10 KM (5 NMI) WIDE. THE ASH IS
ESTIMATED AT FL200.   
    
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TRAJECTORY: ANY VOLCANIC ASH PRESENT UP TO FL200 WOULD MOVE
SOUTHWEST AT 15 TO 20 KTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 08/0130 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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CLARK
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