FVXX21 KWBC 031030
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VOLCANIC ASH ADVISORY
ISSUED 1030 UTC 03 NOVEMBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-068      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 INFRARED AND MULTISPECTRAL
IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE...INSTITUTO
GEOFISICO IN ECUADOR...AVIATION MODEL WIND DATA FROM THE U.S.
NATIONAL WEATHER SERVICE.
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ERUPTION DETAILS: THE NOVEMBER 2 BULLETIN OF THE INSTITUTO GEOFISICO
DESCRIBES A CONTINUOUS ASH GRAY EMISSION FROM THE VOLCANO AS WELL AS
INTERMITTENT EXPLOSIONS.
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DETAILS OF ASH: WE CONTINUE TO BE UNABLE TO DETECT ASH IN
MULTISPECTRAL OR INFRARED SATELLITE IMAGERY THROUGH 0945 UTC. 
SCATTERED LOW AND MID LEVEL METEOROLOGICAL CLOUDS CONTINUE TO HAMPER
ASH DETECTION. AT ABOUT 03/0000 UTC ASH BETWEEN FL300 AND FL340
COULD STILL BE OBSERVED EXTENDING FROM THE SUMMIT TOWARD THE
SOUTHEAST. 
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TRAJECTORY: UPPER AIR PATTERNS INDICATE THAT ANY ASH BETWEEN FL300
AND FL340 WOULD MOVE TOWARD THE EAST AT 15 TO 20 KNOTS.  ANY ASH
BETWEEN FL200 AND FL280 WOULD MOVE TOWARD THE EAST SOUTHEAST AT LESS
THAN 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 AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 03/1630 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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