FVXX21 KWBC 162300
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2300 UTC 16 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-256         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...17/0000 UTC AVIATION MODEL WIND
FORECAST...GEOPHYSICAL INSTITUTE REPORT AND UPPER AIR DATA.
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ERUPTION DETAILS: STEAM EMISSIONS WITH OCCASIONAL PULSES OF ASH.
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DETAILS OF ASH: GOES-8 MULTISPECTRAL IMAGERY THROUGH 2215 UTC SHOWS
A VERY THIN PLUME OF ASH EXTENDING 44 KM (24 NMI) TO THE SOUTHWEST
OF TUNGURAHUA TO 1.77S 78.69W. THIS ASH IS ESTIMATED TO BE AT OR
BELOW FL240.  
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH AT OR BELOW
FL240 TO MOVE SOUTHWEST AT 5 TO 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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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 17/0500 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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HUGHES/NOAA/NESDIS/SAB
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NNNN
"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"