FVXX21 KWBC 291245
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1245 UTC 29 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-309         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 IN QUITO...UPPER-AIR SOUNDING
DATA...
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ERUPTION DETAILS: INTERMITTENT ASH AND STEAM EMISSIONS...  
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DETAILS OF ASH: MORNING SATELLITE DATA THRU 29/1215 UTC DOES NOT
INDICATE ANY ASH OR STEAM IN THE VICINITY OF THE SUMMIT. A LAYER OF
MID AND HIGH LEVEL CLOUDS ASSOCIATED WITH NEARBY SHOWER AND
THUNDERSTORM ACTIVITY IS NOTED. HOWEVER THE GEOPHYSICAL INSTITUTE
REPORTS THAT THERE CONTINUE TO BE SMALL EXPLOSIONS ON A DAILY BASIS
WITH ASH AND STEAM EMITTED. THE EMISSIONS HAVE BEEN BEEN REPORTED TO
BE RATHER WEAK AND GENERALLY REACHING FL200.
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TRAJECTORY: ANY ASH AND STEAM FROM THE SUMMIT TO FL200 SHOULD MOVE
MOVE TO THE SOUTHEAST 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 29/1900 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON
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