FVXX21 KWBC 012255
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 2255 UTC 01 NOVEMBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-061      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...UPPER AIR SOUNDING DATA...GUAYAQUIL METEOROLOGICAL WATCH
OFFICE.
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ERUPTION DETAILS...THE VOLCANO ERUPTED AT ABOUT 1245 UTC AS SEEN IN
SATELLITE IMAGERY.
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 2145 UTC SHOWS THAT
TUNGURAHUA IS CURRENTLY IN ERUPTION. A WELL DEFINED ASH PLUME IS
SEEN LEAVING THE VOLCANO SUMMIT AND MOVING TO THE SOUTH AND
SOUTHEAST WELL AWAY FROM THE VOLCANO SITE. THE ASH IS ESTIMATED NOW
TO BE AT FL390 WHICH IS JUST A BIT HIGHER THAN THE PREVIOUS HEIGHT
ASSESSMENT FROM THE GUAYAQUIL METEOROLOGICAL WATCH OFFICE. THE ASH
IS ORIENTED IN A CURVED BAND AND IS PUSHING RATHER RAPIDLY TO THE
SOUTH AND SOUTHEAST OF THE VOLCANO. UPPER-AIR WIND DATA SHOW THAT
WITH TIME THE ASH PLUME SHOULD HEAD MORE TO THE SOUTHEAST RATHER
THAN SOUTH OVERNIGHT.
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AT 2145 UTC THE ASH CLOUD EXTENDS FROM THE SUMMIT TO A POINT AT 2.3S
78.4W. THIS IS A DISTANCE OF 87 KM (47 NMI) SOUTH-SOUTHEAST OF THE
VOLCANO. THE PLUME IS 23 KM (12 NMI) WIDE.
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TRAJECTORY: THE ASH PLUME IS MOVING TO THE SOUTHEAST NOW AT 20 TO 30
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  
http://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 STATEMENT WILL BE ISSUED BY 02/0600 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON
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NNNN
"Attached Graphic Map Depicting Ash" 

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