FVXX21 KWBC 212350
VOLCANIC ASH ADVISORY
ISSUED 2350 UTC 21 JUL 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-854         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 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: SATELLITE IMAGERY THROUGH 21/2315 UTC CONFIRMS
REPORTS OF AN ASH CLOUD THIS EVENING AT TUNGURAHUA. THE LATEST
IMAGES SUGGEST THAT THERE IS AN AREA OF AT LEAST MODERATELY
DENSE ASH MOVING TO THE WEST AND NORTHWEST OF THE SUMMIT. IT
IS VERY DIFFICULT THOUGH TO ASCERTAIN THE AREAL COVERAGE DUE
TO OTHER CLOUDS IN THE REGION. THE GEOPHYSICAL INSTITUTE
REPORTED THAT THE EMISSION STARTED AT 21/2220 UTC. THEY HAVE
JUST REPORTED HOWEVER WITHIN THE LAST 5 MINUTES THAT THERE IS
STILL ASH EMMANATING FROM THE SUMMIT. IT IS ESTIMATED TO BE
REACHING AS HIGH AS FL350.
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TRAJECTORY: ASH FROM THE SUMMIT TO FL250 SHOULD MOVE TO THE
NORTHWEST AT 10 TO 20 KNOTS WHILE ASH FROM FL250 TO FL350
SHOULD MOVE WEST 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 22/0600 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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