FVXX21 KWBC 280630
VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 0630 UTC 28 APR 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-497         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. FORECAST FROM THE 28/0000 UTC
AVIATION MODEL.
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ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS.   
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 27/0545 UTC SHOWS
LOW AND MID LEVEL CLOUDS OVER THE VOLCANO MAKING ANY DETECTION
OF ASH AND STEAM DIFFICULT. BOTH THE GEOPHYSICAL INSTITUTE AND
A SURFACE OBSERVATION FROM CHIMBORAZO REPORTED VOLCANIC ASH
OVER THE VOLCANO. THE LATEST OBSERVATION FROM EARLIER TODAY
PLACED THE ASH AT FL240.
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TRAJECTORY: ASH UP TO FL240 WOULD MOVE TOWARDS THE WEST AT 20
KNOTS.
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 28/1230 UTC.
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC
ASH ADVISORY STATEMENTS 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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