FVXX21 KWBC 231400
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1400 UTC 23 NOV 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-156         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. THE GEOFISICO INSTITUTO.  23/0000 UTC AVIATION MODEL WIND
FORECAST.
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ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS...AND OCCASIONAL
EXPLOSIONS AS REPORTED BY THE GEOFISICO INSTITUTO.
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DETAILS OF ASH: AT 1315 UTC ASH EXTENDS 144 KM (78 NMI) TO THE EAST
NORTHEAST OF THE SUMMIT.  THIS ASH IS APPROXIMATELY BOUNDED BY 1.5S
78.4W TO 1.0S 77.9W TO 0.8S 77.3W TO 1.4S 77.5W TO 1.5S 78.4W. 
UPPER AIR PATTERNS SUGGEST THAT THE ASH IS BELOW FL300.  
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TRAJECTORY: ASH IS MOVING TOWARD THE EAST NORTHEAST AT ABOUT 8
KNOTS. IF FUTURE EMISSIONS PRODUCE ASH BETWEEN FL330 AND FL400 IT
IS ANTICIPATED THAT THIS ASH WOULD MOVE TO THE WEST AT 15 TO 30
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 23/2000 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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RUMINSKI
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NNNN"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"