FVXX21 KWBC 221500
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1500 UTC 22 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-279        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 INFRARED VISIBLE AND MULTISPECTRAL
IMAGERY. GEOPHYSICAL INSTITUTE REPORT AND AVIATION MODEL WIND DATA. 
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ERUPTION DETAILS: CONTINUAL STEAM AND ASH EMISSION.
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DETAILS OF ASH: THERE IS EXTENSIVE METEOROLOGICAL CLOUD COVER IN THE
AREA THROUGH 1415 UTC MAKING DETECTION OF ANY ASH DIFFICULT.  ANY
ASH PRESENT IS BELIEVED TO BE BELOW FL230 BASED ON YESTERDAYS
DAILY REPORT FROM THE GEOPHYSICAL INSTITUTE WHICH INDICATED ASH
HEIGHTS NO GREATER THAN FL230. 
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TRAJECTORY: ANY ASH BETWEEN FL165 AND FL230 WOULD MOVE TOWARD THE
WEST SOUTHWEST AT 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 22/2100 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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CLARK/SAB/NOAA/NESDIS 
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