FVXX21 KWBC 241300
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1300 UTC 24 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-288         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...GEOPHYSICAL INSTITUTE REPORT...0600 UTC AVIATION MODEL
WIND FORECAST
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ERUPTION DETAILS: INTERMITTENT ASH AND STEAM EMISSIONS
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DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH
24/1215 UTC POSSIBLY DUE TO THE WEATHER CLOUDS IN THE AREA.
OCCASIONAL SMALL EXPLOSIONS THAT HAVE BEEN REPORTED BY THE
GEOPHYSICAL INSTITUTE ON A DAILY BASIS HAVE BEEN TYPICALLY SENDING
ASH AND STEAM TO BETWEEN FL180 AND FL230.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL160
AND FL200 WOULD MOVE TO THE WEST OR NORTHWEST AT ABOUT 5 KNOTS. 
HIGHER LEVEL ASH WOULD MOVE MORE TO THE SOUTH OR SOUTHWEST AT UP
TO 15 KTS.
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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 24/1900 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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STREETT
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