FVXX21 KWBC 151310
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1310 UTC 15 NOV 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-122         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...0000 UTC AVIATION MODEL WIND DATA
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ERUPTION DETAILS: CONTINUOUS ASH EMISSIONS....THICKER ASH RELEASED
OVER LAST TWO HOURS.
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DETAILS OF ASH: GOES 8 SATELLITE IMAGERY THROUGH 1315 UTC SHOWS THAT
A RATHER IMPRESSIVE ASH CLOUD NOW EXISTS FROM THE SUMMIT AND OFF TO
THE NORTHWEST. OVER THE LAST 2 HOURS THERE HAS BEEN A RELEASE OF
VERY THICK ASH WITH A STRONGER EMISSION. THE LEADING EDGE OF ASH AT
1315 UTC IS 171 KM (92 NMI) TO THE NORTH-NORTHWEST OF THE SUMMIT. AT
THE MOST IT IS 101 KM (54 NMI) WIDE. WHILE MOST OF THIS ASH IS THIN
IN NATURE THERE IS AN AREA OF MUCH THICKER ASH THAT EXTENDS FROM THE
SUMMIT TO A DISTANCE OF 45 KM (25 NMI) TO THE NORTH-NORTHWEST. THE
ASH IS STILL ESTIMATED TO BE AT FL250. IT IS POSSIBLE THAT THE MOST
RECENT THICK ASH EMISSION COULD BE SLIGHTLY HIGHER.
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TRAJECTORY: ASH UP TO FL250 WOULD MOVE NORTH NORTHWEST AT 15 TO 20
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 15/1930 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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ORRISON/KARST
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NNNN
"Attached Graphic Map Depicting Ash" 

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