FVXX21 KWBC 112330
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VOLCANIC ASH ADVISORY
ISSUED 2330 UTC 11 NOV 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-106         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...GUAYAQUIL METEOROLOGICAL WATCH OFFICE
SIGMETS.... GEOPHYSICAL INSTITUTE IN QUITO AND U.S. NUMERICAL MODEL
WINDS.
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ERUPTION DETAILS: CONTINUOUS VENTING OF ASH AND STEAM NOW AT LOWER
LEVELS. A NEW EXPLOSION OCCURRED AT 1945 UTC. 
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DETAILS OF ASH: GOES-8 MULTISPECTRAL IMAGERY AT 1945 UTC PICKED UP A
NEW EXPLOSION OF TUNGURAHUA. ASH COULD BE SEEN MOVING SOUTHWEST AT
10 KNOTS. THIS ASH CLOUD HAS BECOME FAINT AND DETACHED FROM THE
SUMMIT. THIS ASH IS ESTIMATED TO BE BETWEEN FL350 AND FL300 BASED ON
NUMERICAL MODEL WIND DATA. ONLY A SMALL VENTING CAN BE SEEN IN
CURRENT IMAGERY.  
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TRAJECTORY: UPPER AIR DATA AND MODEL OUTPUT DATA SUGGEST ANY ASH
BETWEEN FL250 AND FL300 TO BE MOVING SOUTHWEST AT 10 TO 12 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 AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 12/0530.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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HUGHES - NOAA/NESDIS/SAB
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