FVXX21 KWBC 210800
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 0800 UTC 21 OCTOBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-012       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...
GUAYAQUIL METEOROLOGICAL WATCH OFFICE...U.S. NATIONAL WEATHER
SERVICE NUMERICAL WEATHER PREDICTION MODELS 
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ERUPTION DETAILS: PERIODIC MINIMAL TO MODERATE ERUPTIONS.
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DETAILS OF ASH: ASH CAN NOT BE SEEN ON CURRENT GOES-8 SATELLITE
IMAGERY THROUGH 21/0715 UTC.
IN ADDITION A PILOT REPORT RECEIVED BY THE METEOROLOGICAL WATCH
OFFICE ON THE EVENING OF OCTOBER 20 INDICATED THAT THERE WAS SOME
ASH TO FL230 NEAR THE VOLCANO.
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TRAJECTORY: NUMERICAL MODEL FORECASTS SUGGEST THAT ANY ASH AT THE
SUMMIT UP TO A LEVEL OF FL230 WOULD MOVE SOUTHWEST AT 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 BY 21/1400 UTC.
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WALTER/SAB/NOAA/NESDIS
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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