FVXX21 KWBC 212300
VOLCANIC ASH ADVISORY
ISSUED 2300 UTC 21 JUL 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-853         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 AND
MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO.
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ERUPTION DETAILS: EXPLOSION WITH HEAVY ASH EMISSION AROUND
21/2220 UTC.
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DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE HAS JUST REPORTED
THAT A RATHER IMPRESSIVE EXPLOSION HAS OCCURRED AT TUNGURAHUA.
A DENSE ASH CLOUD WAS OBSERVED TO BE LEAVING THE SUMMIT AND
REACHING A ESTIMATED HEIGHT OF FL350. THE REPORT WAS AS OF
21/2220 UTC. SATELLITE IMAGERY THORUGH 21/2215 UTC REVEALED NO
ASH OR SUGGESTIONS OF ANY ERUPTION. THE NEXT SEVERAL IMAGES
SHOULD REVEAL THE NATURE OF THIS EVENT.
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TRAJECTORY: ASH FROM THE SUMMIT TO FL250 SHOULD MOVE TO THE
WEST AT 10 TO 20 KNOTS WHILE ASH FROM FL250 TO FL350 SHOULD
MOVE SOUTHWEST AT 20 TO 30 KNOTS.
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 22/0500 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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ORRISON
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