FVXX21 KWBC 072120
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2120 UTC 07 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-218        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 VISIBLE MULTISPECTRAL AND INFRARED
IMAGERY.  UPPER AIR DATA AND REPORTS FROM THE GEOPHYSICAL INSTITUTE. 
U.S. NATIONAL WEATHER SERVICE MODEL DATA.
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ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND STEAM.
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DETAILS OF ASH:  CURRENT SATELLITE IMAGERY THROUGH 2015 UTC SHOWS NO
DETECTABLE ASH PLUME.  THE AREA IS COVERED WITH THUNDERSTORM DEBRIS
AND CIRRUS.
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TRAJECTORY: MODEL DATA FORECASTS INDICATE THAT ANY ASH BETWEEN FL190
AND FL320 WOULD MOVE NORTHWESTERLY AT 15 TO 20 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 AND VAFTAD.
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EFFECTIVE JANUARY 3 2000 AT 0000 UTC... ALL REFERENCES TO LATITUDE
AND LONGITUDE IN VOLCANIC ASH ADVISORY STATEMENTS WILL BE IN DEGREES
AND MINUTES OF A DEGREE.  EXAMPLE: 16.70N 62.20W  WILL BE 1642N6212W
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THE NEXT STATEMENT WILL BE ISSUED BY 08/0330 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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