FVXX21 KWBC 230800
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 0800 UTC 23 OCTOBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-020       ECUADOR 1.47S 78.44W 
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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
...GEOPHYSICAL INSTITUTE...U.S. NATIONAL WEATHER SERVICE NUMERICAL
WEATHER PREDICTION MODELS 
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ERUPTION DETAILS: CONTINUOUS VENTING OF ASH AND STEAM
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DETAILS OF ASH: THROUGH 0715 UTC ANY ASH CLOUD IS OBSCURED BY THICK
METEOROLOGICAL CLOUDS OVER THE COUNTRY.  THE GEOPHYSICAL INSTITUTE
CONTINUES TO REPORT THAT SEISMIC ACTIVITY REMAINS HIGH AND IT IS
LIKELY THAT THE VOLCANO CONTINUES TO VENT ASH AND GASES.
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TRAJECTORY: NUMERICAL MODEL FORECASTS VALID AT 23/0600 UTC SUGGEST
THAT ANY ASH BETWEEN FL160 AND FL250 WOULD MOVE TOWARD THE WEST TO
SOUTHWEST AT 5 TO 10 KNOTS.
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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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OUTLOOK:  SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED AROUND 23/1400 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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