FVXX20 KWBC 031735 
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VOLCANIC ASH ADVISORY STATEMENT...AMENDMENT
ISSUED 1735 UTC 03 JAN 1999 BY THE WASHINGTON VAAC
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AMENDMENT TO SAY VAFTAD WILL BE AVAILABLE...
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GUAGUA PICHINCHA 99-001    ECUADOR 0.17S 78.6W  
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BACKGROUND:    GUAGUA PICHINCHA (NEAR QUITO) (1502-02)
               SUMMIT HEIGHT 15696 FT (4784M)
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SOURCES OF INFORMATION:  SIGMET FROM GUAYAQUIL (SEGU)...GOES-8
VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. GOES HIGH DENSITY WINDS.
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ERUPTION DETAILS: SOMETIME BEFORE 1240 UTC MOVING WEST.
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DETAILS OF ASH CLOUD: WE HAVE RECEIVED AN AMENDED SIGMET FROM
ECUADOR ISSUED AT 1610 UTC (NOT THE ORIGINAL ISSUED AT 1240 UTC) FOR
AN ERUPTION OF GUAGUA.  SATELLITE IMAGERY SHOWS BROKEN CONVECTIVE
CLOUDS AROUND THE AREA. NO DISCERNABLE ASH CLOUD CAN BE FOUND
THROUGH THE BREAKS. THE SIGMET STATES THE ERUPTION LASTED 20 MINUETS
AND WENT TO 2000M AND MOVED WEST. WE ARE ASSUMING THIS IS ABOVE THE
SUMMIT WHICH WOULD PLACE THE ERUPTION CLOUD TO BETWEEN FL200 AND
FL250. 
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TRAJECTORY: THE ASH WILL MOVE WEST TO WEST SOUTHWEST AROUND 15 TO 20
KNOTS. 
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THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY
A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS  
www.ssd.noaa.gov/VAAC/messages.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE LATEST SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED AROUND 03/23OO UTC UNLESS FURTHER
INFORMATION IS RECEIVED OR THE ASH CLOUD BECOMES DETECTABLE.       
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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