FVXX21 KWBC 291325
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1325 UTC 29 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-310         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...GUAYAQUIL MWO SIGMET...AIRCRAFT REPORT...
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ERUPTION DETAILS: INTERMITTENT ASH AND STEAM EMISSIONS...  
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DETAILS OF ASH: IN THE LAST 30 MINUTES THERE HAVE BEEN REPORTS OF
ASH LEAVING THE SUMMIT OF TUNGURAHUA. IN ADDITION THERE IS
SUGGESTION OF AN ASH PLUME NOW IN THE VISIBLE AND MULTISPECTRAL
IMAGERY THROUGH 29/1245 UTC. THE LATEST QUAYAQUIL MWO SIGMET
INDICATES THAT AN AIRCRAFT REPORTED ASH TO FL230 OVER THE SUMMIT AT
29/1255 UTC. MID AND HIGH LEVEL CLOUDINESS ASSOCIATED WITH NEARBY
SHOWER AND THUNDERSTORM ACTIVITY APPEARS TO BE MIXED IN WITH THE
ASH. EXTREME CAUTION IS ADVISED.
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AT 29/1245 UTC THE SATELLITE DATA SUGGESTS AN ASH PLUME EXTENDING
ABOUT 20 KM (11 NMI) TO THE SOUTHWEST OF THE SUMMIT WHICH IS 10 KM
(5 NMI) WIDE.
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TRAJECTORY: ASH AND STEAM REACHING FL230 MOVING NOW TO THE SOUTH AND
SOUTHWEST AT ABOUT 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/CLARK
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NNNN
"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"