FVXX21 KWBC 091900
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VOLCANIC ASH ADVISORY
ISSUED 1900 UTC 09 NOV 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-097    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 METEOROLOGICAL WATCH OFFICE...00 UTC AVIATION
NUMERICAL WEATHER MODEL WIND DATA...REPORT OF THE INSTITUTO
GEOFISICO 
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ERUPTION DETAILS: CONTINUOUS ASH VENTING AND POSSIBLY SOME
OCASSIONAL EXPLOSIONS.
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1815 UTC INDICATES THAT
THE LEVEL OF ASH ACTIVITY HAS REMAINED ABOUT CONSTANT OVER THE
LAST 6 HOURS. ASH CONTINUES TO LEAVE THE SUMMIT WITH A DIRECTION TO 
THE SOUTHEAST. IT CURRENTLY EXTENDS 70 KM (38 NMI) TO THE SOUTHEAST
AND IS 39 KM (21 NMI) WIDE. THE ASH IS STILL ESTIMATED TO BE AT
FL320 BASED ON SATELLITE IMAGERY ANALYSIS AND THE 0000 UTC AVIATION
MODEL UPPER-AIR SOUNDING DATA.
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TRAJECTORY: SOUTHEAST AT 10 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 10/0100 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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