FVXX21 KWBC 061610
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1610 UTC 06 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-213        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. DISTINCT
ERUPTION WITH ASH TO APPROXIMATELY FL600 AT ABOUT 1400 UTC.         
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DETAILS OF ASH: THERE ARE TWO DISTINCT PLUMES OF ASH. ONE PLUME IS
DETACHED FROM AND EAST OF THE VOLCANO EXTENDING FROM 1.3S 78.3W TO
1.5S 78.2W AND IS 14 KM (8 NMI) WIDE. THIS ASH IS AT FL600 AND IS
FROM A BRIEF EXPLOSIVE ERUPTION AT 1400 UTC. 
THE OTHER PLUME IS TO FL200 AND APPEARS TO BE FROM NEAR CONTINUOUS
ASH AND STEAM EMISSIONS. THIS PLUME EXTENDS 37 KM (20 NMI) TO THE
WEST OF THE VOLCANO AND IS 16 KM (9 NMI) WIDE. 
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TRAJECTORY: THE ASH AT FL600 IS MOVING TO THE EAST AT ABOUT 20 KT.
THE ASH AT FL200 IS MOVING TO THE WEST AT 10 KT.
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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 06/2200 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.

NNNN"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"