FVXX21 KWBC 272355
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2355 UTC 27 NOV 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-176        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 AND MULTISPECTRAL AND
INFRARED IMAGERY...REPORT FROM THE GEOFISICO INSTITUTO...1800 UTC
AVIATION MODEL UPPER-AIR SOUNDING DATA
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ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS...
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DETAILS OF ASH: CLOUDINESS ASSOCIATED WITH SCATTERED SHOWER AND
THUNDERSTORM ACTIVITY IS BEGINNING TO BREAK UP AND THIS HAS ALLOWED
FOR THE DETECTION OF A RATHER IMPRESSIVE ASH CLOUD OVER THE LAST
HOUR FROM TUNGURAHUA. ASH IS ESTIMATED TO BE REACHING FL300 AND
IS OBSERVED TO BE CONTINUOUSLY VENTING FROM THE SUMMIT.
MULTISPECTRAL IMAGERY AND LATE VISIBLE IMAGERY VERIFY THE EXISTENCE
OF THE PLUME MOVING TO THE SOUTHWEST. IN ADDITION THE GEOFISICO
INSTITUTO REPORTS THAT THE VOLCANO REMAINS VERY ACTIVE WITH CONSTANT
ASH AND GASES EMISSIONS AND THUS SUPPORT THE SATELLITE DATA
FINDINGS. 
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A MULTISPECTRAL IMAGE AT 27/2315 UTC SHOWS AN ASH CLOUD EXTENDING
134 KM (72 NMI) DOWN TO A POINT AT 2.41S 79.19W WHICH IS SOUTHWEST
OF THE SUMMIT. THE ASH CLOUD IS 85 KM (46 NMI) WIDE.
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TRAJECTORY: SOUTHWEST AT 10 TO 20 KNOTS FROM THE SUMMIT UP TO FL300.
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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 AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 28/0600 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON
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NNNN"Attached Graphic Map Depicting Ash" 

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