FVXX21 KWBC 171410
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1410 UTC 17 OCTOBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-001       ECUADOR 1.47S 78.44W 
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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...GUAYAQUIL MWO...SURFACE OBSERVATIONS
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ERUPTION DETAILS: GOES 8 IMAGERY SUGGESTS A SMALL ERUPTION BEGAN AT
17/1030 UTC. LATEST IMAGERY SUGGESTS THICKER ASH LEAVING THE VOLCANO
AND REACHING FL400.
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DETAILS OF ASH: GOES 8 VISIBLE MULTISPECTRAL AND INFRARED IMAGERY
INDICATE THAT THE TUNGURAHUA VOLCANO HAS BECOME MORE ACTIVE OVER THE
LAST SEVERAL HOURS. THE VOLCANO WHICH HAS BEEN OCCASIONALLY EMITTING
SMALL AMOUNTS OF ASH AND STEAM OVER THE LAST 24 HOURS APPEARS TO NOW
BE EMITTING MORE IMPRESSIVE AMOUNTS OF ASH AND STEAM. THROUGH 1315
UTC A NARROW ASH PLUME CAN BE SEEN MOVING TO THE WEST-NORTHWEST AWAY
FROM THE VOLCANO. OVER THE LAST HOUR MULTISPECTRAL AND INFRARED
PICTURES ARE SUGGESTING ASH WHICH INDICATES A THICKER ASH
CONCENTRATION AND AT A HIGHER ALTITUDE. ASH IS ESTIMATED TO BE AT
FL400. THE LATEST PLUME EXTENDS 57 KM (31 NMI) TO THE WEST-NORTHWEST
FROM THE SUMMIT (1.47S 78.45W) TO A COORDINATE OF 1.27S 78.92W AND IS
21 KM (11 NMI) WIDE.
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TRAJECTORY: WEST TO NORTHWEST AT 15 KNOTS.
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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 NEXT MESSAGE WILL BE ISSUED BY 17/2030 UTC.       
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON
NNNN
"Attached Graphic Map Depicting Ash" 

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