FVXX21 KWBC 110230  
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0220 UTC 11 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-232        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  MULTISPECTRAL AND INFRARED 
IMAGERY...UPPER AIR DATA AND REPORTS FROM THE INSTITUTO GEOFISICO
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ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND STEAM WITH
OCCASIONAL LARGER PUFFS
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DETAILS OF ASH: UNTIL ABOUT 2345 UTC A VERY FAINT ASH PLUME COULD BE
SEEN IN SATELLITE IMAGERY.  THE PLUME EXTENDED FROM THE VOLCANO
SUMMIT 25 KM (13 NMI) TOWARD THE SOUTHWEST. THIS ASH WAS ESTIMATED
TO BE AT ABOUT FL180.  HOWEVER WITH MID LEVEL WEATHER CLOUDS MOVING
INTO THE AREA THIS PLUME CAN NO LONGER BE DISCERNED IN SATELLITE
IMAGERY THROUGH 0145 UTC.  
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TRAJECTORY: ASH WAS OBSERVED MOVING TO THE WEST SOUTHWEST AT ABOUT
15 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 11/0830 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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