FVXX20 KWBC 071915
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1915 UTC 07 OCTOBER 1999 BY THE WASHINGTON VAAC 
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GUAGUA PICHINCHA 99-035 ECUADOR 0.17S 78.60W 
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BACKGROUND:    GUAGUA PICHINCHA (1502-02)
               SUMMIT HEIGHT    15,695 FT (4784 M)  
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SOURCES OF INFORMATION: GOES8 VISIBLE INFRARED AND MULTISPECTRAL
IMAGERY THROUGH 1845 UTC..0000 UTC NUMERICAL WEATHER MODEL AND
TRAJECTORY FORECASTS. UNITED STATES GEOLOGICAL SURVEY AT GEOPHYSICAL
INSITUTE IN QUITO. 
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ERUPTION DETAILS: 07/1207 UTC 

DETAILS OF ASH CLOUD: THE USGS AT THE GEOPHYSICAL INSITUTE REPORTED
AN EXPLOSIVE ERUPTION OF GUAGUA AT 07/1207 UTC. THE GOES 8 VISIBLE
IMAGE AT 07/1845 UTC SHOWS TWO AREAS OF ASH STILL EVIDENT. ONE AREA
TO THE EAST OF THE VOLCANO IS ESTIMATED AT FL500 AND IS BOUNDED BY
THE FOLLOWING POINTS:0.4S 75.9W TO 0.2N 77.2W AND IS 141 KM (76 NMI)
LONG AND 78 KM (42 NMI) WIDE. THE AREA TO THE WEST IS AT FL400 MOVED
TOWARDS THE WESTSOUTHWESTWARD AND IS BOUNDED BY THE FOLLOWING
POINTS: 0.8S 79.6W TO 0.3S 80.2W AND IS 80 KM ( 43 NMI) LONG AND 33
KM (18 NMI) WIDE.
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TRAJECTORY: ASH TO FL400 WOULD MOVE TOWARDS THE WESTSOUTHWEST AT 15
TO 20 KTS WHILE ASH FROM FL400 TO FL500 WOULD MOVE TOWARD THE EAST
AT 20 TO 25 KTS. 
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OJK/BH
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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  
www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE SIGMETS AND VAFTAD.
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THE NEST MESSAGE WILL BE ISSUED AT 08/0130 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN"Attached Graphic Map Depicting Ash" 

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