FVXX21 KWBC 171330
VOLCANIC ASH ADVISORY  
ISSUED 1330 UTC 17 JUN 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-708         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. WIND FORECAST FROM AVIATION MODEL.
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ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS.  
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 17/1245 UTC SHOWED
EXTENSIVE WEATHER CLOUDS OVER THE VOLCANO MAKING ASH DETECTION 
DIFFICULT.  IN THE SATELLITE IMAGES A PLUME OF POSSIBLE MIXED
ASH AND CLOUDS WAS OBSERVED EXTENDING FROM THE SUMMIT TOWARD
THE SOUTHWEST.  HOWEVER IT IS NOT CERTAIN WHETHER ASH IS
REALLY PRESENT IN THIS PLUME.  IF ASH IS PRESENT IT IS
BELIEVED TO BE BELOW FL260 BASED ON THE APPEARANCE OF THE
POSSIBLE PLUME IN VISIBLE AND INFRARED IMAGERY.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH FROM THE
SUMMIT TO FL260 WOULD MOVE TOWARD THE SOUTHWEST AT 15 TO 20
KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 17/1930 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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