FVXX20 KWBC 221600
VOLCANIC ASH ADVISORY 
ISSUED 1600 UTC 22 OCT 2000 BY THE WASHINGTON VAAC
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TUNGURAHUA 00-1170        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. 22/1800 UTC FORECAST UPPER WINDS FROM
THE 22/0600 UTC AVIATION MODEL. GOES-8 DERIVED WINDS.
GUAYAQUIL METEOROLOGICAL WATCH OFFICE.
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ERUPTION DETAILS: REPORT OF ASH AT 1325 UTC WITH OBSERVED
POSSIBLE ASH AT 1345 UTC.
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DETAILS OF ASH CLOUD: THE MWO IN GUAYAQUIL INDICATED A RECENT
PILOT REPORT OF ASH OBSERVED AT 1325 UTC TO FL260 MOVING WEST.
GOES-8 IMAGERY AT 1345 UTC DID SHOW A SMALL ASH CLOUD BUT THIS
CLOUD MOVED EAST NORTHEAST OF THE VOLCANO AND QUICKLY
DISSIPATED. THIS COINCIDES WITH A PILOT REPORT OF ASH TO FL250
OBSERVED AT 1338 UTC. CURRENT GOES-8 IMAGERY THROUGH 1545 DOES
NOT INDICATE THE PRESENCE OF ASH. EXTRAPOLATION OF THE
OBSERVED CLOUD PLACES IT NEAR 0114S 7747W WITH A RADIUS OF 25
KM AROUND THE POINT. ESTIMATED ASH HEIGHT IS FL250 BASED ON
REPORTS AND UPPER AIR SOUNDING FORECAST. 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL200 TO
MOVE WEST AT 10 TO 15 KNOTS. ASH ABOVE FL200 WOULD MOVE
NORTHEAST AT 5 TO 10 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 22/2200 UTC.
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REAL TIME SATELLITE IMAGERY AND 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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HUGHES
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