FVXX21 KWBC 181450
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1450 UTC 18 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-263         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...18/0600 UTC AVIATION MODEL WIND FORECAST 00 UTC UPPER
LEVEL REPORT FROM GEOPHYSICAL INSTITUTE. 
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ERUPTION DETAILS: CONTINUOUS  EMISSIONS OF ASH AND STEAM.
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DETAILS OF ASH: LATEST GOES-8 IMAGERY THRU 1415 UTC SHOWS POSSIBLE
SMALL PUFFS OF ASH CLOUDS MOVING TOWARD THE WEST-SOUTHWEST AT 15
KNOTS. EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA MAKES EXACT
LOCATION OF  ASH DIFFICULT TO DISCERN.  UPPER LEVEL WIND DATA WOULD
PLACE THIS ASH AT FL180. THE GEOPHYSICAL INSTITUTE REPORTED
YESTERDAY THAT THERE WERE CONTINUOUS EMISSIONS OF ASH 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ASH AT FL180 WOULD MOVE
TO THE WEST-SOUTHWEST AT 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 18/2100 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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SCHWARTZ/NOAA/NESDIS/SAB
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