FVXX21 KWBC 071730
VOLCANIC ASH ADVISORY
ISSUED 1730 UTC 07 JUL 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-794         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: GOES-8 VISIBLE ... INFRARED AND
MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM THE 07/1200
UTC AVIATION MODEL. SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH
OFFICE.
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ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS.  
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DETAILS OF ASH: ASH CANNOT BE DISCERNED IN THE SATELLITE
IMAGERY THROUGH 07/1645 UTC DUE TO BROKEN CLOUDS IN THE
VICINITY OF THE VOLCANO.  HOWEVER A WEAK HOT SPOT WAS SEEN AT
1645 UTC.  AT 07/1355 UTC A PILOT REPORTED ASH TO FL270.  AT
1620 UTC THE GEOPHYSICAL INSTITUTE REPORTED POSSIBLE ASH OVER
THE VOLCANO AT UNKNOWN HEIGHT.       
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TRAJECTORY: ANY ASH NEAR THE SUMMIT WOULD MOVE TOWARDS THE
WEST AT ABOUT 15 KNOTS.  FROM THE SUMMIT TO FL270 WINDS BECOME
LIGHT AND VARIABLE.
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 07/2330 UTC.
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC
ASH ADVISORIES 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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