FVXX21 KWBC 230200
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 0200 UTC 23 OCTOBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-019       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: THE GEOPHYSICAL INSTITUTE IN ITS DAILY REPORT ON THE
VOLCANO INDICATED A CONTINUOUS VENTING OF ASH AND GASES.  SEISMIC
ACTIVITY HAS ALSO BEEN CONTINUOUS AT HIGH LEVELS.  EARLY YESTERDAY
(0900 LOCAL) PILOTS REPORTED THE ERUPTING COLUMN AT NEARLY FL230.
BASED ON THE INSTITUTES REPORT AN ASH PLUME IS ASSUMED TO BE PRESENT
EVEN THOUGH UNDETECTABLE IN SATELLITE IMAGERY THROUGH 0115 UTC DUE
TO EXTENSIVE HIGH AND MID LEVEL CLOUDS.
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TRAJECTORY: NUMERICAL MODEL FORECASTS VALID AT 23/0000 UTC SUGGEST
THAT ANY ASH BETWEEN FL160 AND FL230 WOULD MOVE TOWARD THE WEST
SOUTHWEST OR 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 23/0800 UTC.
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TURK/SAB/NOAA/NESDIS
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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