FVXX21 KWBC 011915
VOLCANIC ASH ADVISORY STATEMENT  
ISSUED 1915 UTC 01 FEB 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-131         ECUADOR 0128S 7826W 
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BACKGROUND:    TUNGURAHUA ECUADOR (1502-08)
               SUMMIT HEIGHT 16480 FT (5023 M)
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SOURCES OF INFORMATION: GEOPHYSICAL INSTITUTE...GUAYAQUIL
METEOROLOGICAL WATCH OFFICE...GOES-8 VISIBLE..INFRARED AND
MULTISPECTRAL SATELLITE IMAGERY...06 UTC AVIATION MODEL WIND
FORECAST.
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ERUPTION DETAILS: THE GEOPHYSICAL INSTITUTE REPORTS AN ERUPTION AT
1805 UTC. 
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DETAILS OF ASH: A SMALL AREA OF ASH CAN BE SEEN IN VISIBLE SATELLITE
IMAGERY JUST TO THE WEST OF THE SUMMIT. THE AREA IS NEARLY CIRCULAR
IN SHAPE AND IS DETACHED FROM THE VOLCANO SUMMIT..INDICATING A BURST
OF ASH. THE ASH IS 7 KM WIDE CENTERED AT 0130S 7834W AND IS
ESTIMATED TO BE AT ABOUT FL300. HOWEVER THE HEIGHT ESTIMATE IS
UNCERTAIN DUE TO NEARLY UNIFORM EASTERLY FLOW FROM THE SUMMIT LEVEL
TO FL400.  
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TRAJECTORY: DEEP EASTERLY FLOW FROM THE SUMMIT LEVEL UP TO FL400 IS
DEPICTED ON LAST NIGHTS OBSERVED UPPER AIR WINDS AND ON MODEL
FORECAST WINDS. ANY ASH IN THIS DEEP LAYER WILL MOVE TO THE WEST AT
15 TO 30 KNOTS.
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OUTLOOK:  SEE SIGMETS 
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NEXT MESSAGE WILL BE ISSUED BY 02/0100 UTC.
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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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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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RUMINSKI
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NNNN
"Attached Graphic Map Depicting Ash" 

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