FVXX21 KWBC 281900
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1900 UTC 28 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-306         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 INFRARED AND MULTISPECTRAL
IMAGERY. INSTITUTE GEOFISICO REPORT AND WIND DATA.
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ERUPTION DETAILS: INTERMITTENT ASH AND STEAM EMISSIONS.  
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DETAILS OF ASH: THE FAINT PLUME SEEN EARLIER THIS MORNING IN IMAGERY
IS NO LONGER DETECTABLE.  THE INSTITUTE AND SURFACE REPORTS INDICATE
THAT THE ASH EMISSION HAS DECREASED BUT ASH AND STEAM CONTINUES TO
VENT INTERMITTENTLY NEAR SUMMIT.
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TRAJECTORY: ANY ASH BELOW FL240 WILL MOVE TOWARDS THE SOUTH TO SOUTH
SOUTHWEST AROUND 10 TO 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.
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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 29/0100 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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