FVXX21 KWBC 251230
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1230 UTC 25 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-292         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...0600 UTC AVIATION MODEL WIND FORECAST...SIGMET FROM THE
GUAYAQUIL METEOROLOGICAL WATCH OFFICE
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ERUPTION DETAILS: INTERMITTENT ASH AND STEAM EMISSIONS
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DETAILS OF ASH: VISIBLE SATELLITE IMAGERY SHOWS A SMALL ASH PLUME
EXTENDING FROM THE VOLCANO TOWARDS THE NORTH.  THE PLUME IS AT LEAST
20 KM (11 NMI) LONG AND 10 KM (5 NMI) WIDE AND REACHES FROM THE
SUMMIT TO THE POINT 1.3S 78.4W.  A SIGMET FOR THE GUAYQUIL MWO CITES
A 1200 UTC SURFACE OBSERVATION OF NORTHWARD MOVING ASH.  ASH IS
ESTIMATED BELOW FL260.
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TRAJECTORY: ASH BELOW FL260 IS MOVING TOWARD THE NORTH AT ABOUT 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 25/1830 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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STREETT
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NNNN
"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"