FVXX21 KWBC 172215
VOLCANIC ASH ADVISORY
ISSUED 2215 UTC 17 JUL 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-836         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 AND INFRARED IMAGERY. 
GEOPHYSICAL INSTITUTE REPORT. WINDS FORECAST FROM THE AVIATION
MODEL. SURFACE REPORT FROM RIOBAMBA. PILOT REPORT.
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ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS.  
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DETAILS OF ASH: A SMALL ASH PLUME WAS VISIBLE ON SATELLITE
IMAGERY AT 17/2115 UTC EXTENDING FROM THE SUMMIT TOWARD THE
SOUTHWEST. A SURFACE REPORT FROM RIOBAMBA CONFIRMED ASH OVER
THE VOLCANO DRIFTING TOWARD THE SOUTHWEST.  AT 17/2115 UTC THE
PLUME EXTENDED ROUGHLY 6 KM (3 NMI) FROM THE SUMMIT.  THE
PLUME IS ESTIMATED AT FL300 BASED ON EARLIER GEOPHYSICAL
INSTITUTE REPORTS. 
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TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL300 WILL MOVE
SOUTHWEST AT 10 TO 20 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 18/0400 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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CLARK
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